check list for roads & buildings works

Check List for R&B WorksGovt. of A.P., Roads & Bldgs. Department

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CHECK LIST No. 1

Check list For Clearing And Grubbing

PRE-CONSTRUCTION STAGE

1) Review the plans, special provision, right of way agreements, which may require special

staking.

2) Confirm land acquisition is completed and area demarcated is in possession.

3) Confirm encroachments (if any) are removed and tree cutting (if any) is carried out

with permission of competent authority.

4) Check whether all the tree roots and stumps are removed in the formation area. Check

whether the pits from where trees have been removed are filled with granular material

and suitably compacted.

5) Ensure that features and facilities, which are to be preserved, are clearly marked.

6) Attention shall be paid to environmental commitments.

7) Determine the method for disposal of all materials outside the right of way.

8) Identify the location of all public utilities (telephone poles, power lines, water supply

lines, sewer lines, UG cables etc.) and ensure proper liaison with concerned authorities

for shifting or for carrying out work safely without affecting the utilities during execution

of works.

CONSTRUCTION STAGE

1) Check whether the Executing Agency equipment has required safety devices for the

protection of personnel and environment. (In forest areas required spark arresters

shall be used in the equipment).

2) Ensure no hazard to public during operations like timber felling, blasting.

3) Ensure a better and coordinated traffic control.

4) Check whether adjacent property and environmentally service-line areas are being

affected and prevent such operations.

5) Limits of clearing areas which do not require removal of stumps should be determined,

and the height of stumps above natural ground be checked.

6) Determine if dead, dying or otherwise unstable trees, which are in the right of way but

outside the clearing limits to constitute a hazard. Any such tree shall be removed.

7) Check whether the cut timber is being handed over to the concerned agencies, in case

the contract provides such handing over.

8) When burial of debris is permitted within the right of way that it will not act as a

permeable layer, does not block drainage and will not interfere with maintenance.

9) Ensure proper precautions, if burning of debris is permitted. Ensure that the smoke will

not interfere with the visibility of public traffic and no air pollution problem is created.

10) Ensure that tree branches overhanging above the roadway are cut off as specified.


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CHECK LIST No. 2

Earth Works

Earthwork includes operation connected with roadway excavation, structure excavation,

backfill, ditch/drain excavation, compaction, embankment construction and borrow area

excavation.

Pre-Construction Stage

1) Confirm required drawings I.e. Longitudinal Section and Cross Section for the proposed

stretch are updated and at hand.

2) Confirm centerline of the proposed road has been set out using Total Station. Drive

pegs to mark it at every 10 m or less in straight reaches. Erect masonry pillars 23x25

cm at each peg position with two sides plastered. Mark on the pillars proposed level

upto which filling is to be done.

3) In the case of road in cutting, two additional pillars are to be constructed on each flank

of the road and with the proposed level of formation on the plaster.

4) Check road safety signs such as "Road work under progress", "Take diversions", etc.

are properly positioned.

5) Earmark/detail personnel for traffic control (if any) concerned authorities to be

informed in advance and publicize the traffic restriction if any.

6) Make a list of persons deployed at site along with qualification and experience.

7) Confirm reference pillars (Temporary Bench Marks) are erected.

8) Confirm quarries are identified and permission (if any) from appropriate authority has

been obtained.

9) Calculate required quantities and assess and satisfy the material is available with quarries.

10) Confirm quarry material have been tested and results are satisfactory.

11) Confirm setting out of curves - Horizontal and vertical have been completed.

12) Confirm requisite templates for camber and depth of loose earth spread are available.

13) Check watering arrangements are satisfactory.

14) Check agreed upon plant and machinery including Vibrohammer for vertical banks

are in good working condition.

15) Check fuel, oil, lubricant, urgent spares (if any) are readily available (in the vicinity)

nearby.

16) Confirm checking and measuring instruments like leveling instrument / staff of 30 m,

tapes etc. is available at site.

17) Check testing equipment for field tests like field density apparatus, rapid moisture

meter etc. are available.

18) Confirm registers/site documents for recording the levels, and any other activity at site

are available.


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19) Check whether marking of exact location of CD works have been completed.

20) Check if any vegetation has grown after clearing and grubbing. If yes repeat the

operation of clearing and grubbing.

21) Check whether the existing ground has been rolled to meet the compaction requirement.

22) Whenever Ground improvement has been proposed check if prefabricated drains (band

drains), sand for sand blanket, geotextile and free draining material of required quantity

are available, before the work is taken up in hand. Please check that the complete

design has been approved by the Engineer.

23) Sections where reinforced soil structures are to be provided, check if precast concrete

facing units, soil reinforcing elements with accessories / Fitting and back fill material

of required quantity are as specification before the work is taken up. Please also check

that the design have been approved by the Engineer.

24) Establish contract for coordination with any other agency working/operating in the

same area.

Construction Stage

In Fill

1) Ensure removal of top 15 to 20 cm of soil when filling is proposed.

2) Ensure ground treatment as per Technical specification - Appendix XXVI-Vol. II in

marking areas before earth wall in embankment is taken in hand.

3) Approved soil for filling to be free from organic or decomposed material.

4) Breaking up of earth clods and compaction of the layers (of 20 to 30 cm as specified)

and rolling to be done with rollers (of type and size as specified). To ensure uniform

thickness of spread, use templates.

5) Modified density to be taken at specified intervals and ensure top 500 mm of

embankment and shoulders to have 97% standard modified proctor density and lower

layers 95%.

6) Ensure that each layer of earthwork is tested (Density and Moisture content) before

starting next layer.

7) Check whether water has been sprinkled over the previous layer top, before laying and

next layer.

8) Check the layer thickness of any later laid to compensate the thickness of grades. If it

is less than 100 mm, then the previous layer top shall be suitably watered and scarified

and then next layer is laid. Ensure proper bonding with old compacted layer and avoid

'peeling off in patches' of the newly laid layer during compaction.

9) Ensure the benching into existing material during hillside construction or where the

section changes from embankment to excavation or while widening the existing

formation is adequate for proper keying of embankment material to original ground.

10) Ensure that rolling over entire area - completely to outside edges is being carried out.


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11) Necessary treatment to side slopes to avoid blockage of drains by loose earth coming

down.

12) Plan cutting operation in such a way to avoid filling the same area later on.

13) Ensure camber, super elevation and gradient of road formation after rolling using

levels, templates etc. liberally. Special templates to be used for curves.

14) No dumping in heaps at the area of work.

15) Ensure that the top of the cut section sub-grade is property rolled. If granular subbase

is proposed straight on top of the cut formation, the top 500 mm below the cut

formation level shall be excavated and re-rolled to have 97% standard modified proctor

density compaction. If the soil at the cut formation level is found unsuitable either due

to inadequate CBR value or due to sub-standard quality, top 500 mm soil below the

cut formation level shall be removed and thrown away. The formation base shall be

compacted to 95% of modified proctor density value, and suitable sub-grade material

of 500 mm thick shall be placed on top of cut formation and compacted according to

the specification, before laying any pavement layers.

16) Check the material used for sub-grade, whether it has four days soaked CBR of minimum

10%.

17) Quality control tests during construction as stipulated in Annexure A.

18) Ensure earthwork in Earth retaining Structures as per Technical Specification Appendix

XXVII-Volume II.

Post Construction Stage

1) Confirm width of formation is as specified

2) Ensure side slopes are dressed to specified slope.

3) Check camber is achieved.

4) Tolerances in Surface levels as specified.


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CHECK LIST No. 3

Check list for Protective Works

PRE- CONSTRUCTION STAGE

Stone Pitching or Turfing

• Confirm slope of embankment is as specified (1 in 2)

• Check the stones collected for size. Large size boulders should be used. Each stone

should be over 40 kgs. Smaller size stones should not be used.

• For turfing, the clods of turf should be at least 50 mm thick and contain roots.

Roadside and Catchment Drains

• Check drains planned for road in cutting

• Check whether bed slope is correct

• Check whether the slopes of drains are as per designs

• Check whether the excavated earth is removed and spread or disposed off.

CONSTRUCTION STAGE

Stone Pitching or Turfing

• Ensure stone pitching is in accordance with IRC: 89 Clause 5.3.5.1.

• Ensure Stones and clods of turf are hand packed from bottom on top.


• In case of turfing, unless done during the monsoon, daily watering for 30 days should

be ensured.

• In case of drains, ensure excavated earth is removed from site.


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CHECK LIST No. 4

Check list for Granular Subbase

Pre- Construction Stage

1) Confirm subgrade is adequately compacted. If there is time gap for execution of GSB

layer and the previously finished subgrade, check whether the subgrade test results are

valid. Check whether the compaction of the subgrade is still in good condition, if not

carryout proof rolling. Clear all loose or external materials before laying GSB from

subgrade top.

2) Confirm camber, cross slope and side slope of embankment are correct. Check whether

the subgrade top surface tolerance levels are within the permissible limits prescribed.

3) Confirm grading of GSB materials has been tested and is of correct specifications as

per Appendix A.

4) Check whether the "Ten Percent Fines Value" test and water absorption value test

have been conducted and the results are as per the Specification.

5) Check templates available for indicating thickness of loose layer to be spread.

6) Check watering arrangements are adequate.

7) Confirm rollers are available and in working order.

Construction Stage

8) Observe the spreading and compacting operations. Ensure the material is being spread

without significant segregation. If necessary, obtain samples from the material being

spread and conduct sieve analysis test. Check the layer thickness and confirm that it is

as per specification requirements.

9) Check layer of loose material is as specified in the specification. (For Moisture Content-

IS: 2720 Part 2).

10) Check layer of compacted layer is as specified.

11) Check density of compacted layer is as specified (Density 98% according to IS: 2720

Part 8).

12) Observe the compacting operation to determine that the material forms a firm, stable

base throughout the spread width.


13) Tolerance as specified.


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CHECK LIST No. 5

Check list for Wet Mix Macadam


1) Check whether the previous true layer GSB or subgrade as the case may be, has beenfinished properly and is to the required grades and lines and the surface irregularitiesare within the tolerance levels. Verify whether the subgrade has been prepared to thespecifications laid in Cl. 404.3.1 of MOST.

2) Check whether GSB/subgrade layer compaction is intact if there is a considerabletime delay in execution of WMM and the previous pavement layer (say 10 days). Ifnot, carryout proof rolling.

3) Check whether any loose materials or external materials are on the GSB/subgrade topand remove all loose and external materials before laying WMM.

4) Confirm mix design is known to supervisor in charge of mixing. The design watercontent should be known.

5) Confirm stone aggregate has been tested and is of acceptable quality and adequatequantity (IS: 2386 Part 5) as per Appendix A.

6) Confirm fine aggregate is of correct gradation and adequate quantity.7) Confirm equipment and plant necessary are available and in working order.8) Confirm the sub-base on which wet mix macadam is to be laid is clean.9) Check that the paver is adjusted to give the specified minimum thickness and camber.

Do a trial stretch of about 5 to 10 m to confirm this.

Construction Stage

10) Observe the spreading and compacting operations. Ensure the material is being spreadwithout significant segregation. When WMM is spread by graders/pavers, the layersize particles have a tendency to segregate. Check continuously while spreading thatthis type of segregation does not take place and take suitable remedial action eithermanually rectifying or adjusting the blade angles of the paver screed. Ensure nosegregation takes place and material is spread without rock pockets.

11) Confirm that the gradation of spread materials are as per the job mix, by takingsamples from the spread materials and conducting gradation tests.

12) Monitor thickness of wet mix macadam layer. (Not less than 75 mm)13) Monitor whether required camber is achieved.14) Monitor water content. Excess water will/result in separation of coarse and fines

(Optimum moisture for mixing IS: 2720 Part 8).15) Monitor compaction achieved is as required. Observe the compacting operation to

determine that the material forms a firm, stable base throughout the spread width.Rolling continued till density achieved is at least 98% of MDD (IS: 2720 Part 8).

16) Control tests and their minimum frequencies as specified in Appendix - A.

17) Tolerance shall be within the limits as specified.


18) Erect barricades or pitchstones to prevent traffic.19) Road shall be allowed to dry for a minimum period of 24 hours. No traffic shall be

allowed over the surface before any priming coat is laid.


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CHECK LIST No. 6

Check list for Laying Prime Coat

PRIME COAT

Prime coat is the application of liquid asphalt/emulsion over an absorbent granular

surface preparatory to any superimposed bituminous treatment or construction. Generally prime

coat is applied to seal the granular surface


1) Check the choice of bitumen and quantity shall be as per relevant specifications.

2) Confirm cut back mix emulsion is known to supervisor in charge of mixing.

3) Confirm bitumen has been tested and is of acceptable quality.

Sampling and Testing of Bituminous primer according to

IS: 217 (Cutback bitumen)

IS: 454 (Digbol type cutback bitumen)

IS: 8887 (Specification for bitumen emulsion for roads {cationic type})

Generally heavier grades of bitumen can be used during hot weather and on open

surface texture; lighter grades are more suitable under normal surface conditions or

cold weather construction. Confirm the type of bitumen, which is going to be used, is

as per the particular specification requirements.

4) Prime coat shall not be applied on a wet surface or during dust storm or when the

weather is rainy, windy or foggy. Ensure that no priming is done when the atmospheric

temperature is less than 10OC.

5) Check arrangements for ensuring correct dosing is in place.

6) Confirm equipment like bitumen boiler, bitumen spreader to be used is available and

in working order.

Construction Stage

7) Surface should be swept clean, free from dust and shall be dry. If the surface to be

primed is so dry or dusty, a light and uniform sprinkling of water may be done, but no

priming shall be undertaken till such time is no surface water is visible,


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8) Check bitumen spread per sqm. is as specified. Check the temperature of the bitumen

prior to application and ensure that it is within the specified range.

9) Check the viscosity of bitumen used.

10) Check whether the spread of bitumen is uniform and no uncovered patches are left on

the surface.

11) Control tests and frequencies shall be as per Appendix A.


12) Erect barricades or pitchstones to prevent traffic.

13) Surface shall be allowed to cure for a minimum period of 24 hours or any other period

as per site conditions.

14) If the primed surface is not cured within 24 hours of application, sand may be spread

lightly over the primed surface.

15) Sand should be spread only thick enough to prevent pickup of asphalt. The need for

large amounts of sand to blot up excess liquid asphalt is an indicative or error in

selecting the rate of application or type of binder.

16) Care shall be taken to remove all loose sand before taking up the next course.


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CHECK LIST No. 7

Check list for Laying Tack Coat

TACK COAT

Tack coat is the application of liquid asphalt/emulsion over an existing road surface preparatory

to another bituminous construction over it. Tack coat is applied to ensure better bonding of

layers.


1) Check the choice of bitumen and quantity shall be as per relevant specifications.

2) Confirm cut back mix emulsion is known to supervisor in charge of mixing.

3) Confirm bitumen has been tested and is of acceptable quality and confirms to

specifications (IS: 217, 454 and 8887).

4) Ensure arrangements for applying liquid asphalt confirm to requirements and all the

equipments are available and are in working condition.

5) Confirm that surface over which tack coat is to be applied is clean and all loose material

or extraneous material is removed either by mechanical brooms or by other approved

method.

Construction Stage

6) Check whether the liquid asphalt is heated and the temperature prior to application is

within the range.

7) Check whether the spread of bitumen is uniform and the entire area is covered

uniformly.

8) Ensure that no further layer is spread over tacked area before the tack coat is cured (

until the water/cutter in case of emulsion/cutback has completely evaporated). In

general time gap of 30 minutes will be sufficient.

9) Ensure that tack coat is not applied when the atmospheric temperature is less than

10OC.

10) Check that tack coat is not applied over a freshly laid bituminous course. If due to site

condition, traffic is allowed over the finished layer before next layer is laid, a light tack

coat as decided based on site conditions shall be applied.

11) Normally tack coat is not to be applied over a freshly laid bituminous course. If due to

site condition, traffic is allowed over the finished layer before next layer is laid, a light

tack coat as decided based on site conditions shall be applied.


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CHECK LIST No. 8

Check list For Bituminous Layers Using

Mechanized Construction (BM, DBM & BC)


General

1) Confirm mix design is available.

2) Confirm hot mix plant setting and match the mix design.

3) Confirm whether all the materials are as per criteria furnished in Appendix 'A'.

4) Do a trial run for paver settings and for evolving rolling pattern.

5) Ensure freshly laid surface is barricaded or boulder pitched to prevent traffic for 48

hours.

6) Check the tolerance in surface levels as specified.

7) Check and do not allow any bituminous work when there is a possibility of rain or

during rain.

8) Check the probable environmental impacts due to functioning of the hot mix plant

and ensure proper remedial actions are taken before the actual operation begins. Ensure

regular check to monitor the environmental mitigation action plan and its proper

implementation.

PLANT OPERATION


1) Observe the aggregate storage areas and facilities to ensure that storage is as specified.

When various sizes are stored separately, required physical separation, either by space

between stock piles or some types of wall that will provide separation.

2) Determine whether the stock piled aggregate is similar to the material used for the mix

design. Confirm their quality.

3) Examine the plant whether weighing equipment is as specified.

4) See that scales and meters are sealed or tested as required.

5) Examine the plant to determine if it has a temperature indicating device or the drier

and that it meets requirements set forth in the specification.

6) Check method used for including supplemental fine aggregates or bag house dust as

per specification.

7) Check that the plant is equipped with a functional dust collection system as per

specifications.

8) Determine if there are safety provisions for sample collection as per specifications.

9) Check asphalt storage tanks and determine that they meet specifications. All storage

tanks, transfer lines, pumps etc. should have heating oils or should be jacketed and

heated to maintain the asphalt at the required temperatures.


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10) Check batch plants and determine that it meets the requirements of the specifications.

a) Check whether there are overflow chutes for the hot aggregate storage, which will

prevent overflow between adjacent bins. Examine the chutes to see that they are not

clogged.

b) Provisions for the binder to be introduced uniformly at the specified location.

c) A timing device, which will indicate by audible or visual signal the expiration of the

mixing period - check to ensure that the system is in working order.

Production Stage

1) Maintain a daily plant record. Use a form approved by the Engineer.

2) Ascertain that the production rate for the mix plant does not exceed the specifications.

Production rates in continuous mix plants must not exceed those rates established

during the preceding aggregate weigh belt and asphalt meter calibration.

3) Monitor plant interlocks.

4) Obtain the required certificates of compliance for all asphalt binder loads.

5) Observe aggregate storage and determine that it meets requirement set forth in the

specifications.

6) Determine that supplemental fine aggregate is kept dry and stored properly.

7) Monitor and record the temperature of the asphalt and aggregate and determine that

it meets requirement set forth in the specifications. Any excessive moisture in aggregates

may cause slump of flattened loads, accompanied by considerable bubbling or streaming

of the mixture.

8) Compare aggregate from all bins to determine that it meets specifications. Obtain

samples of the aggregate prior to mixing with asphalt, and test for the grading. Gradings

used by the laboratory for mix design are based on volume and not weight. When

there is a difference of more than 0.2 between the specific gravities of coarse material

and fine material, the field sieve analysis must be adjusted to volume for comparison

with the design curve.

9) Observe the overall plant operation to see that dust or smoke is being controlled as

specified.

10) Observe plant productions to assume that a homogenous mixture is being produced

check the aggregate gradation, mixture consistency, stability and bitumen content. If

the mixture appears to be deficient in any of these respects, the condition should be

discussed and rectified. For batch mixing, do not approve a mixing time of less than

30 seconds unless the reason for such action is adequately documented and based on

tests for uniformity of 'aggregate and asphalt distribution. Mixing time in a continuous'

flow mixer is a function of length of the mixing area and the rate of drop in drier

drum mixing. The most efficient pug mill mixing is obtained when the level of material

is at the top of the paddies, throughout the length of the mixer. Feed must be continuous

and uniform for best results. Also it must be noted in the daily report.


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11) Monitor the temperature of asphalt. In batch plants ensure that the temperature of

the asphalt in the line does not drop more than 8OC (15OF). In continuous feed plants

ensure that the temperature of the asphalt does not vary more than 28OC (50OF).

12) Check to ensure that all the equipments are functioning properly and within the

specifications. When automatic batch mixing is used, check to see that the automatic

equipment is functioning within specifications. When any continuous mixing plant

(drier drum or drier drum pug mill) is used, check to see that the vibrating unit on the

fine bin is in operation. Also ensure that the low-level interlock systems for the aggregate

feeder bins and the asphalt storage are functional.

13) Observe the operation of all weighing systems. Required scales and meters to be retested

whenever there is any indication that there may be in error.

a) The weight of the material falling from the bin gates to the weighing hopper after

the gates are closed must be considered in the batching process. Check that the

weigh box containing the total batch does not contact anything, which prevents a

true indication of the batch weight.

b) Periodically check the batching by comparing the total weight of the batches in a

truckload with the platform scale weight for the some load (This can be done only

when the mixed materials are not kept in silos).

c) Check the asphalt scales frequently to make sure that there is no zero error; that the

scale levers and knife edges move freely; and that there is no bind or drag on the

lever systems.

d) The accuracy of meter driven asphalt proportioning devices should be checked by

comparing meter totalizer readings with asphalt tank stabbings and/or with the

combined aggregate totalizer readings in conjuction with an on site vehicle scales.

14) Observe storage of materials in silos to ensure that segregation is prevented, that

specified temperatures are maintained, and that minimum silo levels are maintained.

15) Examine truck beds prior to loading to ensure that contaminating agents are not used

and that parting agents are used sparingly.

16) Ensure that the automatic aggregate asphalt proportioning system in continuous mix

plants is operating.

17) Record all information that will support payment and will assist in determination of

causes for out of specification materials.

Transportation Stage

1) Check whether truck beds are smooth and free form holes and depression.

2) Is there any leakage of gas or oil from trucks?

3) Are trucks equipped with adequate covers?

4) Do truck and paver operate together without interference?

5) Is the method of coating of contact surfaces of truck beds agreed upon?


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6) Whether any provision for checking the temperature is made in the trucks.

7) Whether any segregation takes place while loading the trucks from the plant.

8) Check whether there is any spillage of mixed material while loading into the trucks

from the plant or at loading the pavers from the trucks. Any spillage shall be removed

and discarded.

9) Check the temperature of mix at the time of loading and unloading. If the reduction

in temperature is substantial, the mix should be discarded.

BITUMEN DISTRIBUTOR

1) Are the heaters and the pump in good working condition?

2) Does the distributor have a volume calibration chart?

3) Are spray bars and nozzles analogged and set at the proper angle for application of

tack coat?

4) Is a proper thermometer provided to verify temperature?

5) Whether a hand held spray hose with nozzle provided to tack irregular areas.

LAYING OPERATIONS

PRE-LAYING

1) Ensure that the base of previous road surface has been prepared as specified, remove

all loose materials and have problems corrected.

2) Ensure that the prime coat/tack coat has been applied uniformly and properly.

Determine temperature of the asphalt material used for prime coat/tack coat. Check

whether all vertical faces are coated.

3) Ensure that tack coat material is being applied at the specified rate and at the proper

distance in advance of the paving operation. Check distributor spray bar height and

nozzle angle.

4) Ensure that the tack coat is broken or cured prior to having wherever required.

5) Ensure that certificates of compliance have been received for each shipment and that

weight and load slips for each liquid asphalt load are accurate.

6) Determine the temperature of the air and record.

7) Examine the spreading equipment to determine whether it has the specified attributes.

Pay particular attention to pavers, which are variable in width, to ensure that spreading

and compacting components extend for the full width of the traffic areas lane to be

paved.

8) Examine rollers to determine whether they have the specified attributes. Ensure that

the specified number of rollers is available as decided during the trial compaction.

Check frequency of vibratory rollers to assure 30-40 impacts per meter with a

tachometer. Whether a rubber tyred roller is used, verify the manufacturer's


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recommended contact pressure.

9) Ensure that all equipments required for checking bitumen content/density are available.

Check for all hand equipments like, lutes, rakes and shovels.

DURING LAYING

1) Record measurements of air, surface and asphaltic mix temperatures. Cool air blowing

can reduce the temperatures of the mix. A cold surface can suck heat out the mix

extremely fast. This will be critical when the lift thickness is thin.

2) Observe spreading:

a) Check equipment being used to ensure it meets specifications.

b) Monitor thickness and observe that the road/lane width is being met.

c) Record number of layers.

d) Check spread rate against theoretical rate.

e) Ensure that longitudinal joints are offset as specified.

f) Check whether the conveyor is exposed to make sure that material is on the hopper

conveyor at all times.

g) Check whether paver hopper is near full at all times. Check flow gates and augurs.

Paver wings should not be dumped as large aggregates accumulate in the wings.

Waste it at the end of the day.

3) Confirm that rolling pattern and compaction effort determined during the trial test are

being met. Check breakdown rolling has been accomplished before minimum

temperature is reached.

4) Obtain a sample of the completed mixture from the mat behind the paving machine

and test it for extraction, moisture, and sieve analysis.

Identify the samples to indicate both the stationing where they were taken and the

approximate area they represent.

Analyze the test data at the earliest possible time. It is preferable that samples

representing drier - drums or continuous mixing be tested in the field, in order that

immediate corrective action can be taken for any deviations.

For determining the uniformity of the mixture as placed - consider tests from the mat

at longitudinal intervals and not at transverse.

For determining mixer efficiency - consider taking samples from the pug mill or discharge

gates of batch plant or from the discharge chute of drum-mixer plant.

5) Check the rolling temperature of mix during laying shall be 120OC - 160OC. It is an

extremely important factor in compaction. Rolling should begin in sequences as soon

as mat will support the weight of roller without picking up material on the drum or

unduly marking of shoving the mat. Check that rolling is done at as high a temperature

as possible, because highest initial densities are achieved at high temperature optimal

for rolling.

6) Check transverse and longitudinal joints are constructed properly. Observe constructions

at cold transverse joints to see specifications are being met.


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7) Observe that the segregation and visual pavement deformities are being avoided or corrected.

8) Ensure that smoothness of the surface is as specified record measurements.

9) Check the edge alignment of the material being placed. Check is should not be thin or

thick compared to lift thickness.

10) Ensure that defective areas have not developed. Check pavement for pooling of asphalt,

bleeding, raveling, rock pockets, consistent color etc.

DURING TRIAL COMPACTION

1) Use a test trip. The use of a compaction test strip before the start of a project will headoff problems before they arise. It will also provide information to the roller operatorto establish the:

• Roller pattern and speeds

• Frequency and amplitude settings

• Density specifications for job

• Number of passes, vibratory or static

2) Testing shall be done on a test strip, which is similar in condition and nature to that ofthe project highway. Preferably a short length of the project road itself is treated astest strip.

3) Testing should begin with the roller set at its recommended amplitude. If the unitbounces, or moves sideways, reduce the amplitude setting. If it is obvious that particlesare being fractured, reduce the amplitude.

4) It should be obvious that maximum amplitude should not be utilized when beginningto roll a thin lift.

5) The use of the test strip is an educated trial and error process to determine the mostproductive procedure for a particular project.

6) Even if density requirements are set by using the marshal or kneading compactor atest strip will still permit the contractor to develop the rolling patterns, type of compactoretc. to meet the specifications.

DURING ROLLING

1) Check the fuel tanks are full and there will be no delay during the day.

2) Check the water supply, spray bars and nozzles. Any clogged nozzles need to be cleanedout before work beings.

3) Check the engine oil, hydraulic tank Grease the machine and inspect the drums for anydent.

4) If the rollers are to be stopped for any length of time, park at an angle on a cool part of themat. Parking on a warm mat will most likely leave an indentation that will not roll out.

5) At the end of a pass, while reversing, turn the roller into a slight curve prior to stoppingavoid leaving a transverse ridge across the mat.

6) When using a vibratory roller, check whether it is operated at a speed that will provide at leastone drum impact or more per 2.5 cm of travel. Ripples may result if this is exceeded.

7) Never allow to vibrate when the roller is stationary; use-automatic vibration cut off.

8) Check whether deceleration /acceleration is being done smoothly while reversingdirection to avoid pushing or shoving the mat.

9) Sharp turns shall be avoided otherwise it will cut the mat.


17

CHECK LIST No. 9Typical Corrective Action Plan for

Asphaltic Layers Placement

Test Item Corrective Action

Asphalt Content If test results are outside tolerance (4.5-5.5%) an immediate investigation

will be conducted to determine the cause. Corrections will be made and

material will be tested immediately to ensure that the correction has

been effective.

Aggregate If test results are outside tolerance an immediate investigation will be

conducted to determine the cause. Corrections will be made to stockpiles,

bins, bells or scales and material will be tested immediately to assure that

the correction has been effective.

Aggregate When individual or composite aggregate moisture values differ from

those of the plant computer, the plant computer will be adjusted to

reflect the most recent aggregate moisture.

Asphalt If the asphalt temperature exceeds the permissible ranges (120°C to

160°C) the plant operator will immediately take corrective action to raise

or lower the temperature as required. Temperature will be closely

monitored to verify that the corrections were adequate.

Mix Temperature If the mix temperature exceeds 160°C the plant operator will immediately

take corrective action to lower the temperature as needed. Temperature

will be closely monitored to verify that the correction was adequate.

Asphalt concrete- that exceeds 160°C shall not be used in the work and

shall be disposed off suitably.

Mix Moisture If the mix moisture exceeds 1%, the plant operator will note the moisture

content and corrective action will be taken to reduce the moisture in the

mix. Aggregate piles may be spread to dry, aggregate time in the heater

may be increased, etc.

Sub-grade If inspection indicates that the sub-grade is not prepared as specified,

and as required, immediate action will be taken. Sub grade problems will

be corrected-dried, cleaned, compacted, graded, etc. Asphalt concrete

will not be placed until the corrections have been made and the Engineer

has inspected and approved.

Prime/Tack Coat If inspection indicates that the prime or tack coat material or application

arc not in accordance with the specifications immediately action will be

taken,. Prime coat will be re-applied, changed, time for “break” will be

lengthened, etc. Asphalt concrete will not be placed until the corrections

have been made and the Engineer has inspected and approved.

Temperature

in the Hot

Mix Plant

Gradation

Preparation

Moisture


18

Ambient If physical measurements indicate that the ambient temperature is less

than specified (13"C), the paving foreman will be notified and placement

will cease as soon as safety concerns have been provided for.

Mix Temperature If physical measurements indicate that the mix temperature is below the

temperature, which the paving foreman has requested for placement

and breakdown, corrective action will be taken mmediately. Cool mix

will be returned to the plant, the operation will be changed to correct

the situation which is causing the problem, AC will be held in covered

trucks and not windrowed until necessary

In-place Density If field density determination indicates that the asphalt concrete is not

being placed to a minimum relative density of 96%, immediate action

will be taken.Roller operations will be investigated and may be changed,

plant will be notified and mix quality will be examined, temperature will

be determined, etc. Density will be tested immediately following the

corrective action to assure that the action has been effective.

at the Time

of Laying

temperature


19

CHECK LIST No. 10

Check list for Temporary Diversions


FORMATION

1) Check drawings and specifications given in the contract. If site conditions and estimated

period of use so dictate, recommend improvement.

2) Check alignment for gradients and curves. The alignment should be marked in the

same way as formation.

3) Carryout checks as given in Check list No. 1 and 2.

4) The general provision laid out in Clause 112 of MOST Specifications may be adhered

to.

CONSTRUCTION STAGE

WBM, PIPE CULVERTS AND SURFACE DRESSING

5) Carryout all checks given in Check list No. 1 and 2.

6) For WBM check the following:

• Stone metal laid in correct thickness.

• Adequate compaction is done.

• Blindage spread evenly and adequately watered.

• Surface re-rolled.

7) For CD works carryout checks as per Check list No. 14 and 15.

8) For surface dressing check the following:

• Surface cleaned and made dust free.

• Tack coat correctly applied as per specifications, uniformly and without any

uncovered gaps.

• Mixture spread evenly to required thickness and compacted. Test compaction by

field density test.

• Manila ropes or wooden markers laid on edges to improve compaction.

• Seal coat applied if provided for.

POST CONSTRUCTION STAGE

9) Check dimensions of completed work.

10) Check periodic maintenance earned out.


20

CHECK LIST No. 11

Check list for Strengthening of Existing Two Lanes

In strengthening of the existing two lanes, the check lists given in Check list 1 to 12 are also

applicable. This check list covers certain additional aspects to be checked while strengthening

existing roads. All the checks pertain to pre-construction activities.

1) Confirm existing pavement thickness is as assumed in designs. In case this is not so

additional corrections will be required.

2) All cracks in the existing pavement shall be filled with either fog seal or slurry seal.

3) All incorrectly laid/repaired patches/potholes shall be removed and correctly laid.

4) At places having excessive heaving, sinking and undulations of 75mm or more, the

existing pavement should be removed and a fresh layer of granular sub-base should be

laid to facilitate drainage. In such of those locations, the existing pavement shall be

removed either up to the pavement layer or up to the sub grade bottom, depending

upon the gravity of distress and re-compacted in layers. The size of the plot to be dug

open shall be in 5 x 3.5m to ensure compaction using rollers. The edges where

compaction through rollers is not possible, the same shall be compacted by mechanical

plate compactors or mechanical tampers. The plot size may be smaller than 5 x 3.5m,

depending upon site requirements and in such cases entire compaction shall be done

through mechanical plate compactors or mechanical tampers. In case the road passes

through BC soil and hard murum of granular blanket is not provided, the same should

be provided. The pavement should there after be rebuilt.

5) The existing pavement should be roughened before laying fresh layers of wet mix

macadam to ensure proper bonding.

6) Camber and gradients should be checked and corrected where necessary.


21

CHECK LIST No. 12

Check list for Road Furnitures

A. FENCES

1) Review the plans, special provisions and right of way agreements for any special details.

2) Compare the planned location n with actual conditions in the field to ensure that

fences, gates, openings etc will serve the purpose, as intended.

3) Fences should not obstruct flow in streams or drainage areas.

4) Check that the areas in which fences are to be placed are graded and that high points,

which interfere with placing of wire mesh are excavated.

5) Examine the fence material so that it satisfies requirements.

6) Observe the placing of fence posts and measure the spacing. Observe the placement

of corner posts and pull posts to ensure that they are placed at required locations and

in accordance with specified details. Also check that the proper type and number of

brace posts and diagonal wires are used.

7) The barbed wire mesh is placed on the property owner’s side. For chain link fence, the

fabric is generally placed on the highway side.

8) Ensure that fencing is snubbed or guyed at all grade depressions as specified.

B. MARKERS AND DELINEATORS

1) Review the list of markers and delineators shown on the plans.

2) Examine the markers and delineators to ensure that they are as specified. Required

certificates of compliance shall be obtained from quality control inspectors.

3) Observe the installation to ensure that it is performed as specified. Check installation

of target plates and ensure washers are used and that the nuts are not tightened to the

extent that the enamel is cracked.

C. RAILINGS AND BARRIERS

General

1) Make a careful review of the required details. Review the locations in the field.

2) Review the stakes and layout work. Ascertain the offsets and flares are as per the plans.

Metal Beam Guard Railing

1) Measure woods posts or concrete posts, they should satisfy the standards.

2) Ensure that bolt holes in treated posts are filled with grease when required.

3) Observe backfilling of post holes to see that this is performed as specified. Posts

should be set to the full depth shown on the plans.


22

4) Measure the spacing of posts and ensure they are as per specifications.

5) Ensure that the blocks for metal beam guard railing are toe nailed to timber posts and

properly fixed with nuts and bolls on the concrete posts.

6) Ensure that rail elements are lapped so that the exposed ends will not face approaching

traffic. Check bolts for tightness.

7) Measure the height of the railing or barriers above the ground to ensure that it is as

shown on the plans.

8) Ensure that connections to bridge railings, retaining walls, abutments or other flat

surfaces are made as specified.

9) Ensure that anchor assemblies are constructed as specified. Cable clips should be

installed in the proper directions and tightened to the required torque.

10) Where posts are installed in loose soil or near the edge of embankments, it may be

necessary to use longer posts.

11) Concrete anchors and footings must be built according to the dimensions shown on

the plans. Check holes immediately prior to placing concrete.

12) Bolts must be long enough so that nuts are threaded completely into the bolt. Be sure

that no more than 12mm of bolt is exposed on the traffic side of the rail.

13) Ensure that flares are constructed as per the plans.

Concrete Barriers

1) Check that no concrete barriers or railing is placed on new structures until the false

work is released.

2) Review the provisions for closing the temporary gaps in barriers during construction.

3) Check the forms whether they conform to the guidelines and specifications.

4) When extrusion or slip form machineries are used in concrete barrier construction,

inspect the grade upon which the machine will ride to determine if it is smooth enough

to prevent foreseeable violations of specified tolerances.

5) Check the relevant specifications and check lists for producing, placing, finishing and

curing cement concrete to be used.

6) Equipment and concrete design should be such, in extended or slip form barrier

placement, that no hand finishing other than the light brush finish is required. It is

desirable to have the traffic face surface of the barrier as smooth as possible.

Pipe Hand Railing

1) Determine that materials and methods used in anchorage and connections are as

specified and as shown in the drawings.

2) Ensure that cables, chain link fabric and tension wires are connected properly, stretched

and tightened as required.

3) Check railings for proper alignment, appearance and workmanship.


23

D. LANE MARKINGS

1) Review the signing and marking plans, any special requirements and other standard

details.

2) Inspect the equipment for specification compliance. Determine methods for checking

spread rates of paint and glass beads, application temperatures of thermo plastic

materials and maximum temperature of paint.

3) Check pavement temperature prior to application of thermoplastic material. Check

atmospheric temperature and conditions prior to applying paint.

4) Check condition of the pavement prior to application. The pavement should be dry

and clean.

5) Check whether the stencils will produce correctly dimensioned pavement markings.

6) Check the layout work. Determine whether the pavement markings will be correctly

located.

7) Ensure that the thermoplastic material is placed within the correct temperature range.

Thermoplastic material heated to excessive temperatures can flash and splatter when

exposed to air. Temperature gauges mounted on heating equipment should be checked

for accuracy.

8) Check the lane stripe for correct width and edge definition, lengths of gaps and

individual stripes, alignment and correct super imposition of second coats.

9) Any drips, over spray, improper markings, and material tracked by traffic shall be

removed.

10) Check applied thermoplastic material for compliance with thickness requirements.

11) Check application rates for glass beads and paint.

12) Check thermoplastic markings for workmanship as they are applied. .Bumps resulting

from overlaps in extruded materials should not be permitted.


24

CHECK LIST No. 13

Check list for Pipe Culverts

The works can be of two types, extension or new construction. In the case of pipe culverts the

mark out, excavation, bedding and placing of the pipes are most important and any mistake in

these activities cannot be corrected except by complete removal and reconstruction.


1) Test soil and see if it matches design value. If the culvert is in Black Cotton Soil, an

extra 150mm of hard granular blanket should be provided to ensure pipes do not sink

both below the headwalls and below pipes. If the surface is rocky, a concrete bedding

may be necessary to cover the undulation in the rock surface.

2) Pipe should be tested in accordance with IS: 458 (Concrete pipes with and without

reinforcement) for the relevant clauses like NP3 and NP4.

3) Check for the identification marks left on the pipes while inspection and testing of

pipes were carried out in the manufacturing plant.

4) Check for any cracks in the pipes, which might have been caused during transportation

or loading and unloading.

CONSTRUCTION STAGE

a) Excavation

The excavation should be as per drawings but the following should be checked:

• The length of excavation caters for the number of pipes plus the spacing of pipes,

which should be half the diameter of the pipes but not less than 45cms.

• The depth of excavation should cater for the following:

G Cushion above pipe of minimum 60cm of half the dia. or the pipe including

pavements.

G

If the required cushion is not available due to low embankment embed the pipe

in concrete. A minimum of 200mm thick PCC or 150mm RCC all round the

pipe shall be provided.

G

Granular/concrete bedding and foundation depending upon the height of

embankment as per relevant IRC clauses, if necessary.

G

1/3 of pipe dia or 300mm will be buried below nala bed to prevent scour.

• The distances between trenches for foundation of headwalls are such that it suits the

proposed pipe lengths.

b) Foundation and Bedding

1) Check excavation is correct.

2) Check mix proportion of PCC is as specified.

3) Check thickness and material of bedding is as specified.


25

4) Check cradles are provided for resting of pipe joints.

5) Check length of pipe is same as the distance between the outer surfaces of the headwalls.

6) Check proper foundation in case of Black Cotton/Soft soil and concrete bedding in

case of rocky strata is provided.

c) Placing of Pipes

1) Check spacing between pipes is not less than 1/2 dia. of pipe or 50 cms, which

ever is more.

2) Check pipes do not protrude beyond the headwalls.

3) Check cross slope of pipes is as per design.

4) Check joints of pipes properly done using collars or other methods as per specifications.

Joints shall be sealed with mortar, rubber gaskets or other sealing materials.

5) Check pipe joints properly cradled. Joints shall be kept covered and damp for at least 4

days.

d) Headwalls

1) Check headwall foundation is as per drawing.

2) Check headwall constructed as per design. If the same is of un-course rubble ensure

headers are used.

3) UCR masonry cannot be constructed properly to have a watertight joint at outer surface

of pipe at headwalls. In that case the pipes should be encased in 1:2:4 CC near the

headwalls to prevent floodwater from entering around the pipes.

4) Ensure curing for 7 days.

e) Filling Earth over Pipes

1) Ensure the culvert is filled with approved earth in layers not more than 30cms, watered

and compacted.

2) Ensure filling material free of boulders and black cotton or other unsuitable soils.

3) Initial compaction should be done manually.

4) Rolling to be done only after 30cm of earth has been laid over the pipes.

f) General

In general embankment is formed to the full height as required in the profile and plan

drawings. Then the pipe culverts are marked and excavated for pipe laying. This will ensure

better compacted embankment on either side of the pipes. After laying the pipe, the excavated

portion can be filled with granular material and properly compacted so that no settlement takes

place. In case pipes are laid before embankment is constructed, the portion between the pipe

rows and for a width of 0.6 to 0.75m on either side of the pipe shall be backfilled with coarse

granular materials and rolled along with earthwork.


26

CHECK LIST No. 14

Check list for Slab Culverts And Bridges

A. FOUNDATIONS


1) Confirm line out and position of abutments.

2) Confirm sub-soil investigation has been carried out up to 3m below design foundation

depth and design assumptions match actual site conditions.

a. Soil Investigation for foundation: IS: 1498, IS: 1888, IS: 1892, IS: 2131, IS: 2720,

IS: 4434, IS: 1968 and IRC: 75.

b. Foundations resting on Rock: IS: 5313, IS: 4464, IS: 7292, IS: 7317 and IS: 7746

for in-situ tests.

3) Check drawings are available at site.

4) Check materials like aggregate, sand, cement, HYSD bars have been tested as per

Appendix A and test results are satisfactory.

5) Check adequate numbers of moulds are available for taking CC cubes for testing.

6) Check curing arrangements are adequate.

7) Check the required compressive strength of concrete for various items and mix designs

are available.

8) Check equipment and plant like weigh-batching machines, concrete mixers, water

measuring arrangements, Vibrators etc. are available.

9) Check quality control equipment like slump cones are available.

10) Check whether the area to be concreted is free from standing water. The area shall be

properly dewatered and kept clean before concreting.

11) If underwater concreting is to be done, ensure that the same is done through tremie

pipes, or drop bottom buckets or any other approved methods.

12) Before concreting check the weather. If extreme weather concreting is to be done,

ensure necessary precautionary methods as stipulated in the specifications. No

concreting shall be done if the atmospheric temperature is above 35°C or below 5°C.

The concrete temperature should be less than 40°C (or more than 40°C) and not less

than 5°C.

13) Ensure that proper platforms or pathways are laid for movement of people in and

around the concreting area and they are sound and safe.

CONSTRUCTION STAGE

1) Check the load tickets if concrete is delivered through transit mixers or agitators.

2) Check that the transported concrete is not segregated and contains no cement balls.


27

3) Check that no additional water added during hauling or at delivery point without an

prior instructions. If water is to be added, check that it is mixed as specified.

4) Ensure that concrete is placed while fresh and before it has taken an initial set. Ensure

that stiffening of concrete has not taken place in case of transported concrete.

5) Observe the method of placing of concrete and ensure concrete to placed without

any segregation and it is being compacted by specified vibrators.

6) Check that no over vibration takes place. Concrete shall be vibrated to the point where

mortar and water flush to the surface. Under vibration will leave rock pockets contact

between the vibrator and any reinforcement should be minimum, if possible avoid

such contacts.

7) If concreting is done through chutes, ensure that segregation of mortar and aggregate

does not take place. In case the drop height is more, a remixing of concrete shall be

done before placing.

8) Ensure that the drop of concrete shall not be more than 1.5 meters (as per section

1709).

9) In case of underwater concreting, ensure that extra 10% cement is added in the mix

over and above the required cement quantity as decided in the mix design.

10) If any use of admixtures is allowed, check whether they are being mixed as per the

specifications or approvals.

11) If concrete is pumped, ensure that approved type of pump is being used. Ensure that

no segregation takes place in pipes. Ensure that a continuous pumping is done. In case

of frequent stoppages, the pumps are to be cleaned properly other wise, the pumped

material will remain in the pipelines. In that case cleaning will be very tedious concreting

operation may have to be stopped till the pump and pipelines are cleaned.

12) Carry out slump test to ensure correct water cement ratio.

13) Ensure mix design being followed.

14) Ensure adequate CC cubes collected for testing, as per Cl.1716.2


1) Ensure curing earned out for 14 days.

2) Ensure CC cubes tested for 7 days and 28 days strength. In case of M:35 concrete 56

and 90 days strengths must also be determined and found satisfactory.

B. ABUTMENTS, PIERS AND SLABS


In addition to the pre-construction checks for foundation, the following additional

checks will be carried out:

1) Formwork is of desired quality and rigidly fixed. Special care is required to be taken for

second and subsequent lifts to avoid bulging and honeycombing at junction of lifts.


28

2) Confirm reinforcement is correctly tied as per drawings.

3) Approved type of vibrators are available and in working condition.

CONSTRUCTION STAGE

1) Check slab thickness, wall thickness and the area to be concreted is clean from an

foreign materials.

2) Ensure mix design is followed.

3) Carry out workability tests such as slump test to ensure correct water cement ratio.

4) Ensure approved type of vibrators are used.

5) In case of abutments and wing walls ensure weep holes are provided at specific

horizontal and vertical spacing.

6) Check the surface, in case of slab with straight edge. Remove any depressions and

irregularities.

7) Ensure adequate CC cubes (as per Table 1700.8) collected for testing.

8) Ensure that water is not used as a finishing aid. If approved, use approved chemical

finishing aids or evaporation retardants.

9) During placing of concrete, check for any movement or deformation of forms have

the permissible tolerance limits.

10) Ensure that required cover for reinforcement is maintained and not disturbed while

placing concrete.


1) Ensure date of casting painted on surface as soon as side forms are removed.

2) Ensure curing carried out for H days.

3) Ensure that the formwork/false work is removed after stipulated time.

4) Ensure CC cubes tested as per ‘aid down norms and the results are satisfactory.

C. APPROACHES TO CULVERT/BRIDGE

1) Ensure soil used for back filling is of approved material.

2) Ensure embankment built, up in layers of 30cm compacted to 20cms. Test

compaction of each layer by field density test. 98% compaction is necessary.

3) Ensure invert filters are provided at weep holes.

D. PROTECTIVE WORKS

All checks as listed at Check list 2 will be carried out. If additional protective works like aprons

orflood protection bunds have been provided for in the designs, it will be verified that these are

constructed as per drawings and specifications.


29

CHECK LIST No. 15

Check list for Formwork Inspection

LOCATION: DATED:

YES NO N.A.

1. Formwork design/drawing/sketch approved

including de-shuttering arrangements

2. Trial panel approved (if required)

3. Formwork alignment correct

4. Formwork levels correct, including screeds

5. Formwork dimensions correct

6. Formwork member spacing correct

7. Formwork member material quality acceptable

8. False work member sizes correct

9. False work member spacing correct

10. False work member material quality acceptable

11. Gaps between primary and secondary members

closed/wedged.

12. Face boarding/plywood/metal thickness correct

13. Joints between panels closed (no gaps)

14. Joints between panels flush (no steps/lips)

15. Panel flatness acceptable

16. Gaps between secondary members and face panels closed

17. Tie rod material and sizes correct

18. Tie rod spacing correct

19. Tie rods tight, face cones flush

20. Spacers between shutter surface tightly fitting

21. Box outs, cast-in-items, ducts fixed correct, securely

22. Pre-stressing sheathing and vents, alignments and

spacing of supports acceptable

23. Empty sheathing secured against floatation

24. Pre-stressing anchorage positions and fixing acceptable

25. Chamfers/fillets sizes, straightness, fixing acceptable

26. Formwork clean

27. Formwork release oil material approved

28. Form work release oil [Material applied correctly

29. Construction joint preparation satisfactory

30. Safe access constructed

31. Adequate workspace provided for labour, equipment

32. Shutter vibrator (if required) location and fixing arrangements approved


30

CHECK LIST No. 16

Check list for Reinforcement Inspection

LOCATION: DATED:

EXECUTING AGENCY INSPECTION REQUEST NO.

REF. DRAWING NO.

YES NO N.A.

1. Working drawing checked and approved

2. Latest revision being used

3. Bar schedules approved

4. Reinforcement steel material approved

5. Bar bending and cutting satisfactory

6. Formwork member spacing correct

7. Corrosion treatment of bars, if required, satisfactory

8. Bar sizes correct

9. Bar lap lengths correct

10. Bar laps at correct locations

11. Bar tied as specified (check proper quality binding

wires are used)

12. Bar assembly rigid and adequately supported

(Including spacers/chair supports)

13. Cover to bottom bars correct

14. Cover to side bars correct

15. Cover to top bars correct

16. Cover blocks approved including fixing

Inspected by: Signed Date

(For Executing Agency)

Approved by: Signed Date

(For Engineer)


31

CHECK LIST No.17

Check list for inspection before approval to Concrete

LOCATION: DATED:

EXECUTING AGENCY INSPECTION REQUEST NO.

YES/NO CHECK OR N.A. INITIAL

1. Method statement approved

2. Batching plant mixers in working order

(Separate dispenser for admixture, if required, available)

3. Standby batcher in working order

4. Water, sand, coarse aggregate, cement, admixture

approved

5. Water, sand, coarse aggregate, admixture, cementstock sufficient

6. Concrete conveying arrangement (including transit

mixers) available in working condition and of sufficient

capacity.

7. Formwork/scaffolding approved

8. Reinforcement approved

9. Pre-stressing sheathing approved

10. Concreting equipment in working order

11. Standby crane, vibrators present

12. Tremie in working order (for under water work)

13. Concrete gang present, including carpenter, steel fixer,

mechanics and electricians

14. Access like walkways are provided

15. Safety arrangements adequate

16. Lighting provided

17. Communication between various points provided

18. Arrangements for arranging suspension/stoppage of

concrete provided

19. Curing arrangements made

20. Laboratory notified

Inspected by Signed Date

(for Executing Agency)

Approved by Signed Date

(for Engineer)


32

CHECK LIST No.18

Check list for Post Concreting Inspection

LOCATION:

Date of :

Date of pour: Date of side shutter stripped:

Curing: Method Class of finish specified:

Start date: Finish date:

Checks

S or NS *

Curing: Whether properly done as specified and curing register maintained.

1. Class of finish

2. Surface Defects:

(honeycombing/sand No defects

streaks/air bubbles/cold Minor defects

joints) Major efects

Non conformance report No. Date:

3. Cracks: No cracks

Cracks

Nature of cracks:

4. Any other defects

5. If cracking noticed

6. Position/Dimensions: Alignment S or NS

Levels S or NS

Dimension S or NS

- Non conformance report no.:

*S = Satisfactory, NS = Not Satisfactory

Remarks:

Inspected by: Signed Date

(for Executing Agency)

Approved by: Signed Date


33

CHECK LIST No.19

Check List for Batching And Pouring Of Concrete

CONCRETE MIXING

1) Check the concrete grade and the respective mix Design already approved.

2) Check the condition of aggregates to be used.

3) Check the weighing and water dispensing methods adopted during the mixing.

4) Check whether the mixer machine has been cleaned properly.

5) Check whether required mixing time is allowed.

TRANSPORTATION/CONVEYANCE OF CONCRETE

1) Check whether the equipment is in proper working order.

2) Check whether specified methods are being followed.

3) Check whether the stipulated time limits are observed.

4) Check whether non-conforming wet concrete is being rejected and disposed off.

PLACING OF CONCRETE

1) Check whether the concrete is not segregated during pour. The height of dropping is

controlled. It should not exceed 1.5m.

2) Check whether the concrete is poured in layers of about 300 mm.

3) Check that the vibrator is applied systematically to compact uniformly and adequately.

4) Avoid over vibration.

5) Concrete shall not be pulled or pushed. Pouring should be done close to the final

position.

6) Cold joints are not allowed to be developed.

7) Under water concrete shall be poured only by tremies or pipeline.

8) The forms are not displaced or deformed during the concrete pour and vibration.

9) No slurry loss. Suitable no. of carpenters should be present and watch formwork

during the pour.

10) The concrete is poured within the allowable time limits from the time of batching.

11) Concrete cubes are taken as required as per table 1700.8 of MO Check the curing

arrangements whether they are satisfactory.


34

APPENDIX D:

Proposed Methodology for Rectifying The

Dimensional Control Failure

1. Subgrade: Where the sub grade is high, it shall be trimmed and suitably compacted. Wherethe same is low, the deficiency shall be corrected by scarifying the lower layer and adding freshmaterial and recompacting to the required density.

2. Granular Sub Base: Same as at (i) above except that the degree of compaction and the typeof material to be used shall confirm to the requirement of Clause 401.

3. Wet Mix Macadam: Where the surface is high or low, the top 75 mm shall be scarified,reshaped with added material as necessary and re-compacted to Clause 406.6. Where thesurface irregularity of the Wet Mix Macadam exceeds the permissible tolerances or where thecourse is otherwise defective due to subgrade soil getting mixed with the aggregates, the fullthickness of the layer shall be scarified over the affected area, reshaped with added premixedmaterial or removed and replaced with fresh premixed material as applicable and re-compactedin accordance with Clause 406.3. The area treated in the aforesaid manner shall not be lessthan 5m long and 2m wide. In no case shall depressions be filled up with unmixed and ungradedmaterial or fines.

4. Bituminous Constructions: For bituminous construction other than wearing course, wherethe surface is low, the deficiency shall be corrected by adding fresh material over a suitabletack coat if needed and re-compacting to specifications. Where the surface is high, the fulldepth of the layer shall be removed and replaced with fresh material and compacted tospecifications.

For wearing course, where the surface is high or low, the full depth of the layer shall beremoved and replaced with fresh material and compacted to specifications. In all cases wherethe removal and replacement of a bituminous layer is involved, the area treated shall not beless than 5m in length and not less than 3.5m in width.

5. Dry Lean Concrete Sub-base: The defective length of the course shall be removed to fulldepth and replaced with material confirming to Clause 601 or 603, as applicable. The areatreated shall be at least 3m long, not less than 1 lane wide and extend to the full depth. Beforerelaying the course, the disturbed sub-grade or layer below shall be corrected by levelling,watering and compacting. Loose/segregated or defective areas may be corrected by usingfresh lean concrete material laid and compacted as per specifications. For repairing honeycombed surface, concrete with aggregate of size 10 mm and below shall be spread andcorrected. Any level/thickness deficiency should be corrected after applying concrete withaggregates of size I0mm and below after roughening the surface.

6. Cement Concrete Pavement: The defective areas having surface irregularity exceeding 3mmbut not greater than 6mm may be rectified by bump cutting or scrabbling or grinding usingapproved equipment. When required by the Consultant, areas which have been reduced inlevel by the above operation(s) shall be retextured in an approved manner either by cuttinggrooves (5mm deep) or roughening the surface by hacking the surface. If high areas in excess6mm or low areas in excess of 3mm occur, exceeding the permitted numbers and if theExecuting Agency cannot rectify, the slab shall be demolished and reconstructed at theExecuting Agency’s expense and in no case the area removed shall be less than the full widthof the lane in which the irregularity occurs and full length of the slab.

If deemed necessary by the Consultant, any section of the slab, which deviates from thespecified levels and tolerances, shall be demolished and reconstructed at the Executing Agency’sexpense.

Check List for R&B Works

Communicated byADVISOR

Quality control for R&B DepartmentHyderabad, A.P.

Government of Andhra Pradesh

Roads & Buildings Department

check list for roads & buildings works

Documents