ce 39007 – concrete lab - lecture8skbarai/cl8.pdf · 2016-08-03 · 1 ce 39007 – concrete lab...

1

CE 39007 – Concrete Lab

Mondays/Thursdays/Fridays

Instructors:

Nirjhar Dhang (CE, Monday)

Sudhirkumar Barai (CE, Monday)

S K Bhattacharyya (CE, Thursday)S K Bhattacharyya (CE, Thursday)

Biswanath Banerjee (CE, Thursday)

Sushanta Chakrabarti (CE, Friday)

A George (ARP, Friday)

Mix Design

2

Mix Design Methods

Minimum void method

Maximum density method

Fineness modulus method

British Mix Design

ACI Mix Design

IS Mix Design

Data Requirement

Concrete

Cement

Aggregate

Water

3

Data Requirement - Concrete

Characteristic compressive Strength (fck)

Workability desired - Compacting factor

Degree of Quality Control

Type of Exposure

Data Requirement- Cement

Specific gravity

Compressive strength of cement

4

Data Requirement - Aggregate

Maximum size of aggregate

C.A. - Specific gravity, Water absorption (%), Surface moisture, Sieve analysis

F.A. - Specific gravity, Water absorption (%), Surface moisture, Sieve analysis

Data Requirement - Water

Water

5

IS 2000 Clauses

In specifying a particular grade of concrete, the following information shall be included:

Type of mix that is design mix concrete or nominal mix concrete Grade designation Type of cement Maximum nominal size of aggregate Minimum cement content (for design mix concrete) Maximum water cement ration Maximum water-cement ration Workability Mix proportion (for nominal mix concrete) Exposure conditions as per Table 4 and 5 of IS 456:2000 Maximum temperature of concrete at the time of placing Method of placing; and Degree of supervision

IS 2000 Clauses

In appropriate circumstance, the following additional information may be specified.

Type of aggregate

Maximum cement content and

Whether an admixture shall or shall not be used and the type ofadmixture and the condition of use.

6

Mix Design Steps

Design requirements

Characteristic compressive strength at 28 dyas, fck

Maximum size of the available aggregate

Shape of coarse aggregate

Degree of workability desired, compacting factor

Degree of quality control

Type of exposure

Mix Design Steps

Test data for concrete making materials Specific gravity of cement Specific gravity of coarse aggregate Specific gravity of fine aggregate Water absorption (air dray to saturated surface dry) in coarse

aggregate, percent Water absorption (air dray to saturated surface dry) in fineWater absorption (air dray to saturated surface dry) in fine

aggregate, percent Surface moisture - coarse aggregate Surface moisture - fine aggregate Compressive strength of cement at 28 days Sieve analysis results

7

Step 1: Computation of target mean strength

Step 2: Determination of w/c ratio

8

Step 3: Computation of water quantity and determination of entrapped air

Step 3: (Cont.)

9

Step 3: (Cont.)

Step 4: Determination of cement content

10

Step 5: Quantity of coarse aggregate (Ca) and fine aggregate (Fa) per m3 of concrete.

Step 5: (Cont.)

11

Step 6: Determination of mix proportion

Step 6: (Cont.)

12

Step 7: Mix Design Implementation

8/3/2016

1

1.TARGET MEAN STRENGTHSTANDARD DEVIATION

2. WATER-CEMENT RATIO

3. CEMENT CONTENT

4. WATER CONTENT

5. COARSE AGGREGATES

6. FINE AGGREGATES

7. CORRECTIONS FOR MOISTURE ABSORPTION

TARGET STRENGTH FOR MIX DESIGN

ACCEPTED PROPORTION OF LOW RESULTS

1 in 5 0.84

1 in 10 1.28

1 i 15 1 501 in 15 1.50

1 in 20 1.65

1 in 40 1.86

1 in 100 2.33

2.1 IS10262-1982: Page 5

8/3/2016

2

GRADE OF CONCRETE STANDARD DEVIATION FOR DIFFERENT

DEGREE OF CONTROL IN N/mm2

M 103.5

M 15

SUGGESTED VALUES OF STANDARD DEVIATION

M 204.0

M 25

M 30

5.0

M 35

M 40

M 45

M 50

M 55

Table 1IS10262-2009: Page 2

SELECTION OF WATER CEMENT RATIO

CASE‐1: Test results for cement strength is NOT availableUSE FIGURE‐1 OF IS 10262‐1982 ON PAGE‐7

3.1 & Figure 1 IS10262-1982: Page 7

8/3/2016

3

CASE‐2: Test results for cement strength is AVAILABLEUSE FIGURE‐2 OF IS 10262‐1982 ON PAGE‐8

3.1 & Figure 2 IS10262-1982: Page 8

NOMINAL MAX SIZE OF AGGREGATES

(mm)

ENTRAPPED AIR(% of Volume of

Concrete)

10 3.0

20 2 0

APPROXIMATE AIR CONTENT

3.2 & Table 3 IS10262-1982: Page 9

20 2.0

40 1.0

• AMOUNT OF WATER CONTENT

• AMOUNT OF CEMENT

• AMOUNT OF FINE AGGREGATES

• AMOUNT OF COARSE AGGREGATES

8/3/2016

4

NOMINAL MAX SIZE OF

AGGREGATES(mm)

SAND AS % of TOTALAGGREGATE BY ABSOLUTE

VOLUME

10 208 40

20 186 35

40 165 30

Saturated surface dry aggregate

• ANGULAR• Fine Aggregate (natural sand) conforming Zone II of Table 4 of IS:

383-19703 3 97• w/c is 0.6 (by mass)• Workability corresponding to Compacting Factor of 0.8

3.3.2 & Table 4 IS10262-1982: Page 9&10

NOMINAL MAX SIZE OF

AGGREGATES(mm)


VOLUME

10 200 28

20 180 25


• ANGULAR Coarse Aggregate (conforming to IS:383-1970)• Fine Aggregate (natural sand) conforming Zone II of Table 4 (of

IS:383-1970)/ (b )• w/c is 0.35 (by mass)

• Workability corresponding to Compacting Factor of 0.8

3.3.3 & Table 5 IS10262-1982: Page 9&10

8/3/2016

5

ADJUSTMENT OF VALUES IN WATER CONTENT AND SAND PERCENTAGE

CHANGE IN CONDITION WATER % SAND in TOTAL

** Design Stipulation is Different from Previous Tables **

CHANGE IN CONDITION WATERCONTENT

(%)

% SAND in TOTALAGGREGATE

For sand conforming to grading Zone I, Zone III or Zone IV of Table 4 of

IS:383-1970

0 +1.5 % for Zone I-1.5 % for Zone III-3.0 % for Zone IV

Increase or decrease in the value of Compacting Factor by 0.1

±3 % 0

Each 0.05 increase or decrease in free w/c ratio

0 ±1 %

For rounded aggregate -7 %

3.3.4 & Table 6 IS10262-1982: Page 11

Water Content

Fine Aggregate % in Total Aggregate

Cement Content from W/C ratio

Coarse Aggregate % in Total Aggregate

Fine & Coarse Aggregate Content

8/3/2016

6

3.5.1IS10262-1982: Page 11

Minimum Cement Content, Maximum Water-cement Ratio and minimum Grade of Concrete for Different Exposures

(Maximum Nominal Aggregate Size 10mm)Minimum Cement Content (kg/m3)

Maximum Free Water-Cement Ratio

Minimum Grade of Concrete

te Mild 260 0.60 -

Pla

in C

on

cret

Moderate 260 0.60 M 15Severe 280 0.50 M 20Very Severe 290 0.45 M 20Extreme 300 0.40 M 25

orc

ed

cret

e

Mild 340 0.55 M 20Moderate 340 0.50 M 25Severe 360 0 45 M 30

Rei

nfo

Co

nc Severe 360 0.45 M 30

Very Severe 380 0.45 M 35Extreme 400 0.40 M 40

Cement content prescribed in this table is irrespective of the grads of cement and it is inclusive of additions mentioned in5.2. The additions such as fly-ash or ground granulated blast furnace slag may be taken into account in the concretecomposition with respective to the cement content and water-cement ratio if the suitability is established and as long asthe maximum amounts taken into account do not exceed the limit of pozzolona and slag specified in IS:1489 and IS:455,respectively.

Minimum grade for plain concrete under mild exposure condition is not specified.

Table-5 of IS 456-2000: Page 20,21

8/3/2016

7





te Mild 220 0.60 -

Pla

in C

on

cret


orc

ed

cret

e


Rei

nfo

Co

nc Severe 320 0.45 M 30




Table-5 of IS 456-2000: Page 20,21





te Mild 190 0.60 -

Pla

in C

on

cret


orc

ed

cret

e


Rei

nfo

Co

nc Severe 290 0.45 M 30




Table-5 of IS 456-2000: Page 20,21

8/3/2016

8

SAMPLE AMOUNT FOR SIEVE ANALYSIS

Maximum Nominal Size of Approximate Minimum the Aggregate Weight of the Sample

4.75 mm 500 gm

10 mm 2000 gm

20 mm 2500 gm

≥ 40 mm 5000 gm

3.3 of IS 2386(part I)-1963(Reaffirmed 1997): Page 10

GRADED COARSE AGGREGATE IS AVAILABLE

COARSE AGGREGATESIS SIEVE PERCENTAGE PASSING FOR GRADED AGGREGATE OF

DESIGNATION NOMINAL SIZE40 mm 20 mm 16 mm 12.5 mm

40 mm 95-100 10020 mm 30-70 95-100 100 10016 mm - - 90-100 -

12.5 mm - - - 90-10010 mm 10-35 25-55 30-70 40-85

4.75 mm 0-5 0-10 0-10 0-102.36 mm - - -

Table-2 of IS 383-1970: Page 9

8/3/2016

9

Graded Coarse Aggregate Is Not AvailableHowever, SINGLE SIZED AGGREGATE IS ABAILABLE

COARSE AGGREGATESIS SIEVE

DESIGNATIONPERCENTAGE PASSING FOR SINGLE SIZED AGGREGATE OF

NOMINAL SIZE

40 mm 20 mm 16 mm 12.5 mm 10 mm

80 mm

63 mm 100

40 mm 85-100 100

20 mm 0-20 85-100 100

16 mm - - 85-100 100

12.5 mm - - - 85-100 100

10 mm 0-5 0-20 0-30 0-45 85-100

4.75 mm - 0-5 0-5 0-10 0-20

2.36 mm - - - 0-5


Choose a suitable proportion of individual single sized aggregates such that the mixed aggregates show the desired distribution that conforms with Table -1 of IS: 383-1970

FINE AGGREGATESIS SIEVE

DESIGNATIONPERCENTAGE PASSING FOR

GRADING GRADING GRADING GRADING ZONE-I ZONE-II ZONE-III ZONE-IV

10 mm 100 100 100 1004.75 mm 90-100 90-100 90-100 95-1002.36 mm 60-95 75-100 85-100 95-1001.18 mm 30-70 55-90 75-100 90-100600 µm 15-34 35-59 60-79 80-100300 µm 5-20 8-30 12-40 15-50150 µm 0-10 0-10 0-10 0-15


8/3/2016

10

SUGGESTED RANGES OF VALUES OF WORKABILITY OF CONCRETE FOR DIFFERENT PLACING CONDITIONS

PLACING CONDITIONS DEGREE OF WORKABILITY

VALUES OF WORKABILITY

Concreting of shallow sections withvibration

Very low 10-20 s, VEE-BEE timeor

0.75-0.80, Compacting Factor, p g

Concreting of lightly reinforced sections with vibration

Low 5-10 s, VEE-BEE timeor

0.8-0.85, Compacting Factor

Concreting of lightly reinforced sections without vibrationOrH il i f d i i h

Medium 2-5 s, VEE-BEE timeor

0.85-0.92, Compacting Factoror

Heavily reinforced sections withvibration

or25-75 mm Slump for 20 mm

aggregates

Concreting of heavily reinforced sections without vibration

High Above 0.92, Compacting Factoror

75-125 mm Slump for 20 mm aggregates

7.1 of IS 456-2000: Page 17

COMPARISON OF CONSISTENCY MESUREMENTS BY VARIOUS METHODS

Workability Description

SLUMP (mm)

VEE-BEE TIME (s)

COMPACTING FACTOR

Table 20 of SP 23-1982

Extremely Dry

- 32-18 -

Very Stiff - 18-10 0.70Stiff 0-25 10-5 0.75Stiff Plastic 25-50 5-3 0.85

Plastic 75-100 3-0 0.90Flowing 150-175 - 0.95

Relations between slump (in cm) and Vee-Bee (in s or Degree)

Figure 7IS1199-1959(2004): Page 19

8/3/2016

11

SUGGESTED RANGES OF VALUES OF WORKABILITY OF CONCRETE FOR DIFFERENT PLACING CONDITIONS

PLACING CONDITIONS DEGREE OF WORKABILITY

SLUMP (mm)

Blinding concrete;Shallow sections;Pavements using pavers

Very low Compacting Factor 0.75-0.80IS 1199

Mass concrete; Low 25- 75Mass concrete;Lightly reinforced sections in slabs, beams, walls, columns;Floors;Hand placed pavements;Canal lining;Strip footings

Low 25 75

Heavily reinforced sections in slabs, Medium 50-100beams, walls, columns;Slipform work;Pumped concrete

75-100

Trench fill; High 100-150In-situ piling tremie concrete Very High Flow measure IS 9103

7.1 of IS 456-2000: Page 17

EXAMPLE: Determine the CONCRETE MIX PROPORTION for M25 grade and calculate the actual amount of various ingredients required for casting the followings1. 6 cylinders, base 150 mm diameter and axis 300 mm long 2. 6 cubes, each one is having 150 mm edge length3 3 i b 100 id d i 500 l3. 3 square prisms, base 100 mm side and axis 500 mm long

Design Stipulations:(Requirements)1. Characteristic Compressive Strength (28 days) : 25 N/mm2

2. Maximum Nominal size of the Aggregates : 20 mm (Angular)3. Degree of quality control : Good3. Degree of quality control : Good4. Type of Exposure : Mild5. Degree of workability in terms of Compacting Factor : 0.9

8/3/2016

12

Graded Coarse Aggregate Test Result

Sieve SizeCumulative % of Mass Retained

Cumulative % Mass Passing Through

IS:383-1970; Table-1; 20 mm Graded Distribution

40 0 100 100

20 3.5 96.5 95-10010 67.8 32.2 25-55

4.75 97.6 2.4 0-102.36 100 0

TOTAL 268.9Conforming

Fineness Modulus = 2.689

Fine Aggregate Test Result

Cumulative % of Mass Retained

Cumulative % Mass Passing

Through

IS:383-1970; Table-4

ZONE-I ZONE-II ZONE-III ZONE-IV

10 1.8 98.2 100 100 100 100

4.75 3.4 96.6 90-100 90-100 90-100 95-100

2.36 8.4 91.6 60-95 75-100 85-100 95-100

1.18 22.6 77.4 30-70 55-90 75-100 90-100

600 36.4 63.6 15-34 35-59 60-79 80-100

300 76 24 5-20 8-30 12-40 15-50

150 96.4 3.6 0-10 0-10 0-10 0-15

TOTAL 245

Fineness Modulus

2.45 2.71-4.00 2.11-3.37 1.71-2.72 1.35-2.25

Fine Aggregate is conforming with ZONE-III of Table-4 of IS:383-1970

8/3/2016

13

Calculation:



M 103 5


3.5M 15

M 204.0

M 25

M 30

5.0

M 35

M 405.0

M 45

M 50

M 55


8/3/2016

14



3.1 & Figure 1 IS10262-1982: Page 7





te Mild 190 0.60 -

Pla

in C

on

cret


orc

ed

cret

e


Rei

nfo

Co

nc Severe 290 0.45 M 30




Table-5 of IS 456-2000: Page 20,21

8/3/2016

15

NOMINAL MAX SIZE OF

AGGREGATES(mm)


VOLUME

10 208 40

20 186 35

40 165 30




3.3.2 & Table 4 IS10262-1982: Page 9&10

Calculation:

8/3/2016

16





(%)


(3) For sand conforming to grading Zone I, Zone III or Zone IV of Table 4

of IS:383-1970


(2) Increase or decrease in the value of Compacting Factor by 0.1

±3 % 0

(1) Each 0.05 increase or decrease in free w/c ratio

0 ±1 %


3.3.4 & Table 6 IS10262-1982: Page 11

Calculation:

8/3/2016

17

3.2 & Table 3 IS10262-1982: Page 9


(mm)


Concrete)

10 3.0


20 2.0

40 1.0

Calculation:

8/3/2016

18

Water(liter)

Cement(kg)

Fine Aggregate (kg)

Coarse Aggregate(kg)

Item No of Items

Cylinders 6 0.03181

Cubes 6 0.02025

Prisms 3 0.018

Total 0.07006

Actual amount of ingredientsWater Cement Fine Aggregate Coarse Aggregate

1

CE 39007 – Concrete Lab

Mondays/Thursdays/Fridays

Instructors:

Nirjhar Dhang (CE, Monday)

Sudhirkumar Barai (CE, Monday)

S K Bhattacharyya (CE, Thursday)S K Bhattacharyya (CE, Thursday)

Biswanath Banerjee (CE, Thursday)

Sushanta Chakrabarti (CE, Friday)

A George (ARP, Friday)

Mix Design

2

Mix Design Methods

Minimum void method

Maximum density method

Fineness modulus method

British Mix Design

ACI Mix Design

IS Mix Design

Data Requirement

Concrete

Cement

Aggregate

Water

3

Data Requirement - Concrete

Characteristic compressive Strength (fck)

Workability desired - Compacting factor

Degree of Quality Control

Type of Exposure

Data Requirement- Cement

Specific gravity

Compressive strength of cement

4

Data Requirement - Aggregate

Maximum size of aggregate

C.A. - Specific gravity, Water absorption (%), Surface moisture, Sieve analysis

F.A. - Specific gravity, Water absorption (%), Surface moisture, Sieve analysis

Data Requirement - Water

Water

5

IS 2000 Clauses

In specifying a particular grade of concrete, the following information shall be included:

Type of mix that is design mix concrete or nominal mix concrete Grade designation Type of cement Maximum nominal size of aggregate Minimum cement content (for design mix concrete) Maximum water cement ration Maximum water-cement ration Workability Mix proportion (for nominal mix concrete) Exposure conditions as per Table 4 and 5 of IS 456:2000 Maximum temperature of concrete at the time of placing Method of placing; and Degree of supervision

IS 2000 Clauses

In appropriate circumstance, the following additional information may be specified.

Type of aggregate

Maximum cement content and

Whether an admixture shall or shall not be used and the type ofadmixture and the condition of use.

6

Mix Design Steps

Design requirements

Characteristic compressive strength at 28 dyas, fck

Maximum size of the available aggregate

Shape of coarse aggregate

Degree of workability desired, compacting factor

Degree of quality control

Type of exposure

Mix Design Steps

Test data for concrete making materials Specific gravity of cement Specific gravity of coarse aggregate Specific gravity of fine aggregate Water absorption (air dray to saturated surface dry) in coarse

aggregate, percent Water absorption (air dray to saturated surface dry) in fineWater absorption (air dray to saturated surface dry) in fine

aggregate, percent Surface moisture - coarse aggregate Surface moisture - fine aggregate Compressive strength of cement at 28 days Sieve analysis results

7

IS Codes – Mix Design

IS: 10262-2009, Indian standard Concrete mix proportioning - guidelines (First revision) Bureau of India Standard

IS 10262-1982 Indian Standard IS 10262 1982, Indian Standard, Recommended guidelines for concrete mix design, Bureau of India Standard

Mix Design Steps

8/3/2016

1

1.TARGET MEAN STRENGTHSTANDARD DEVIATION

2. WATER-CEMENT RATIO

3. CEMENT CONTENT

4. WATER CONTENT

5. COARSE AGGREGATES

6. FINE AGGREGATES

7. CORRECTIONS FOR MOISTURE ABSORPTION

TARGET STRENGTH FOR MIX DESIGN

ACCEPTED PROPORTION OF LOW RESULTS

1 in 5 0.84

1 in 10 1.28

1 i 15 1 501 in 15 1.50

1 in 20 1.65

1 in 40 1.86

1 in 100 2.33

2.1 IS10262-1982: Page 5

8/3/2016

2



M 103.5

M 15


M 204.0

M 25

M 30

5.0

M 35

M 40

M 45

M 50

M 55




3.1 & Figure 1 IS10262-1982: Page 7

8/3/2016

3

CASE‐2: Test results for cement strength is AVAILABLEUSE FIGURE‐2 OF IS 10262‐1982 ON PAGE‐8

3.1 & Figure 2 IS10262-1982: Page 8





te Mild 260 0.60 -

Pla

in C

on

cret


orc

ed

cret

e


Rei

nfo

Co

nc Severe 360 0.45 M 30




Table-5 of IS 456-2000: Page 20,21

8/3/2016

4





te Mild 220 0.60 -

Pla

in C

on

cret


orc

ed

cret

e


Rei

nfo

Co

nc Severe 320 0.45 M 30




Table-5 of IS 456-2000: Page 20,21





te Mild 190 0.60 -

Pla

in C

on

cret


orc

ed

cret

e


Rei

nfo

Co

nc Severe 290 0.45 M 30




Table-5 of IS 456-2000: Page 20,21

8/3/2016

5

ENVIRONMENTAL EXPOSURE CONDITIONSEnvironment Exposure ConditionsMild • Concrete surface protected against weather or aggressive conditions, except those

situated in coastal area

Moderate 1. Concrete surface sheltered from severe rain or freezing whilst wet.2. Concrete exposed to condensation and rain.3. Concrete continuously under water.y4. Concrete in contact or buried under non-aggressive soil/ground water.5. Concrete surface sheltered from saturated salt air in coastal area.

Severe 1. Concrete surfaces exposed to severe rain, alternate wetting and drying or occasional freezing whilst wet or severe condensation.

2. Concrete completely immersed in sea water.3. Concrete exposed to coastal environment.

Very Severe 1. Concrete surfaces exposed to sea water spray, corrosive fumes or severe freezing conditions whilst wet.

2. Concrete in contact with or buried under aggressive sub-soil/ground water.

Extreme 1. Surface of members in tidal zone. 2. Members in direct contact with liquid/solid aggressive chemicals

Table 3 of IS456-2000: Page 18

NOMINAL MAX SIZE OF

AGGREGATES(mm)

Coarse Aggregates ANGULAR SUB-ANGULAR GRAVEL WITH

CRASHED

APPROXIMATE WATER CONTENT

gg gPARTICLES

10 208 198 188

20 186 176 166

40 165 155 145

• Workability corresponding to SLUPM => 25-50 mm

4.2 & Table 2 IS10262-2009: Page 2&3

• Increase of water content by 3% per every 25 mm increase of SLUMP• Presence of water reducing Admixtures: Decrease water content by 5-10 %• Presence of Superplasticizing Admixtures: Decrease water content by 20 %

8/3/2016

6

NOMINAL MAX SIZE OF

AGGREGATES(mm)


VOLUME

10 208 40

20 186 35

40 165 30




3.3.2 & Table 4 IS10262-1982: Page 9&10

NOMINAL MAX SIZE OF

AGGREGATES(mm)


VOLUME

10 200 28

20 180 25


• ANGULAR Coarse Aggregate (conforming to IS:383-1970)• Fine Aggregate (natural sand) conforming Zone II of Table 4 (of

IS:383-1970)/ (b )• w/c is 0.35 (by mass)

• Workability corresponding to Compacting Factor of 0.8

3.3.3 & Table 5 IS10262-1982: Page 9&10

8/3/2016

7





(%)


For sand conforming to grading Zone I, Zone III or Zone IV of Table 4 of

IS:383-1970


Increase or decrease in the value of Compacting Factor by 0.1

±3 % 0

Each 0.05 increase or decrease in free w/c ratio

0 ±1 %


3.3.4 & Table 6 IS10262-1982: Page 11

NOMINAL MAXIMUM SIZE OF

AGGREGATE(mm)

VOLUME OF COARSE AGGREGATE PER UNIT VOLUME OF TOTAL AGGREGATE FOR DIFFERENT ZONES OF FINE AGGREGATE

w/c is assumed to be 0.5GRADING GRADING GRADING GRADING


10 0.44 0.46 0.48 0.50

20 0.60 0.62 0.64 0.66

40 0.69 0.71 0.73 0.75


PLACEMENT OF CONCRETE USING PUMPED: DECREASE CA BY 10%

8/3/2016

8


(mm)


Concrete)

10 3.0

20 2 0


3.2 & Table 3 IS10262-1982: Page 9

20 2.0

40 1.0

3.5.1IS10262-1982: Page 11

8/3/2016

9

EXAMPLE: Determine the CONCRETE MIX PROPORTION for M25 grade and calculate the actual amount of various ingredients required for casting the followings1. 6 cylinders, base 150 mm diameter and axis 300 mm long 2. 6 cubes, each one is having 150 mm edge length3 3 i b 100 id d i 500 l3. 3 square prisms, base 100 mm side and axis 500 mm long

Design Stipulations:(Requirements)1. Characteristic Compressive Strength (28 days) : 25 N/mm2

2. Maximum Nominal size of the Aggregates : 20 mm (Angular)3. Degree of quality control : Good3. Degree of quality control : Good4. Type of Exposure : Mild(Reinforced Concrete)5. Degree of workability in terms of SLUMP : 100 mm

Graded Coarse Aggregate Test Result

Sieve SizeCumulative % of Mass Retained

Cumulative % Mass Passing Through

IS:383-1970; Table-1; 20 mm Graded Distribution

40 0 100 100

20 3.5 96.5 95-10010 67.8 32.2 25-55

4.75 97.6 2.4 0-102.36 100 0

TOTAL 268.9Conforming

Fineness Modulus = 2.689

8/3/2016

10

Fine Aggregate Test Result

Cumulative % of Mass Retained

Cumulative % Mass Passing

Through

IS:383-1970; Table-4


10 1.8 98.2 100 100 100 100

4.75 3.4 96.6 90-100 90-100 90-100 95-100

2.36 8.4 91.6 60-95 75-100 85-100 95-100

1.18 22.6 77.4 30-70 55-90 75-100 90-100

600 36.4 63.6 15-34 35-59 60-79 80-100

300 76 24 5-20 8-30 12-40 15-50

150 96.4 3.6 0-10 0-10 0-10 0-15

TOTAL 245

Fineness Modulus

2.45 2.71-4.00 2.11-3.37 1.71-2.72 1.35-2.25

Fine Aggregate is conforming with ZONE-III of Table-4 of IS:383-1970

Calculation:

8/3/2016

11

Calculation:

Calculation:

8/3/2016

12

Calculation:

Calculation:

8/3/2016

13

Water(liter)

Cement(kg)

Fine Aggregate (kg)

Coarse Aggregate(kg)

Item No of Items

Cylinders 6 0.03181

Cubes 6 0.02025

Prisms 3 0.018

Total 0.07006

Actual amount of ingredientsWater Cement Fine Aggregate Coarse Aggregate

ce 39007 – concrete lab - lecture8skbarai/cl8.pdf · 2016-08-03 · 1 ce 39007 – concrete lab...

Documents