ladotd construction specifications: parts ii, iii & iv

MARK MORVANT, P.E. ASSOCIATE DIRECTOR, RESEARCH

LADOTD Construction

Specifications: Parts II, III & IV

Presentation Outline

General Introduction

Part II Site Preparation & Earthwork

Part III Base Courses

Part IV Surface Courses

Questions

Committee Members

Member Affiliation

Mark Morvant LTRC

John Wells Contracts and Specifications

Danny Smith Construction Section

Gavin Gautreau LTRC

Neal West District 58

Matthew Ziecker District 05

Jeff Lambert Pavement & Geotechnical Design Section

Bernard Sincavage Construction Section

Bert Wintz Materials

Scott Nelson FHWA

B.J. Carlin W.E. McDonald & Son

Dale Willis Gilchrist Construction

Part II: Site Preparation and Earthwork

201 Clearing and Grubbing

202 Removing or Relocating Structures and Obstructions

203 Excavation and Embankment

204 Temporary Erosion Control


201 Clearing and Grubbing

201.04 Clearing and Grubbing

Redefined clearing and grubbing areas to limits of right-of-way or construction limits (whichever is greater) or as defined in the plans.

Requires contractor to submit an operations plan for burning operations to the engineer for review and comment.


202 Removing or Relocating Structures and Obstructions 202.01 – Clarifies that removal of structures and obstructions

visible at the time of bid, including all related structures or as designated in the plans.

202.05.1 - Asbestos: Updated in accordance with DEQ policy and forms

202.05.5 - Allows contractor to retain steel members when lead paint is removed

202.05.8 Other Regulated Materials (ORM): Allows material not specifically defined to be disposed of as a solid waste in the appropriate solid waste landfill. i.e asphalt shingles, noninfectious medical waste, and etc. not

covered in other items.


203 Excavation and Embankment 203.02 – Clarifies that the bidder shall determine the suitability of

the on-site soils to meet specifications of Section 203.

203.03 – Hydraulic Excavation (new title): Distinguishes Drainage Excavation from Cleaning Existing Ditches. Establishes a bid item for cleaning of existing ditches in order to

reestablish flow lines on the existing alignment

203.06.1 Deleted Selected Soil: Moved definition of soil type to Pipe Backfill specification

203.14.2.1 – Plan Quantity: Added clarification that quantity revisions will not be considered without advanced notice to both parties and unless original cross-sections have been taken.


204 Temporary Erosion Control 204.01 Description – Develop and comply with a Storm

Water Pollution Prevention Plan (SWPPP) approved by the Department in accordance with the department’s Notice of Intent (NOI).

204.03.5.2 Other Retention Systems Other silt retention systems may be used if approved by the Materials Engineer Administrator.

204.06 Construction Requirements - When temporary erosion and pollution control measures are

required due to the contractor's negligence or failure to install permanent controls, such work shall be performed at the contractor’s expense.

When erosion control devices have been properly maintained and exceeded their useful life, they may be replaced with approval and paid for under appropriate pay items as directed.

Part III: Base Courses

301 Class I Base Course

302 Class II Base Course

303 In-Place Cement Stabilized and Treated Base Courses

304 Lime Treatment

305 Subgrade Layer

306 Scarifying and Compacting Roadbed

307 Permeable Bases

308 In-Place Cement Treated Base Courses

309 In-Place Cement Treated Subgrade


301 – Class I Base Course – Maintained due to references

301.01 Description

Soil Cement

Crushed Stone or Crushed Slag

Cement Stabilized Sand Clay Gravel

Asphaltic Concrete Base Course on Treated Layer

Recycled Portland Cement Concrete

Blended Calcium Sulfate


301 – Class I Base Course – Maintained due to references

301.01 Description

Submit a dust control plan to address weather, sight clearance, operational procedures, traffic control and any other project specific concerns. Failure to maintain sight clearance will result in the Engineer stopping contractor operations.

For dust sensitive areas designated on plans, the plan must also include environmental requirements.

In inaccessible areas, PCC or Asphalt may be used at three-quarters of the base thickness


301.03.4 Automatic Finishing Machine– The approved automatic finishing machine shall be capable of operating from an erected stringline or Global Positioning System (GPS) and laser system …

301.16.2 Thickness Tolerances - When crushed stone base or recycled concrete base is used over soil cement base, the individual base layer tolerances shall be as noted above, and the total base course under-thickness shall not exceed 3/4 inch (20mm).


302 Class II Base Courses

Allowable base types same as 301

Dust plan requirements same as 301

Asphalt and Portland cement thicknesses same as 301

Thickness Tolerances same as 301


302.02.1 Soils for Soil Cement - Acceptance of soils with organic contents between 2 to 5 percent may be allowed determination of increased cement percentages based on

lab testing.

Maximum cement rate allowed will be 14 percent by volume.

Perform the laboratory testing specified above at the contractor’s expense.

The laboratory used must be approved by the Materials Engineer Administrator .


Section 303 In-Place Cement Stabilized & Treated Base Courses – Combined 308 into this section

Cement Stabilization – existing roadbed materials

typically 8.5 inches thick

design compressive strength:300 psi

Cement Treatment – existing roadbed materials

typically 12 inches thick

Design compressive strength: 150 psi


Section 303 In-Place Cement Stabilized & Treated Base Courses

303.02.1 Determination of Cement Rate

303.02.1.1 Predetermined (Plan Specified) –cement

percentage as shown on the plans

303.02.1.2 Non-Predetermined- District Laboratory will determine the percent of cement from job samples

303.02.1.3 - Contractor Selected Cement Type - If Type IP or IS is selected at the option of the contractor, lab testing will be by independent lab at expense of contactor to also include durability testing.


Section 303 In-Place Cement Stabilized & Treated Base Courses

303.11.2 Thickness Requirements - When approved, corrections may be made by re-stabilizing or retreatment the existing material in accordance with this section and the cement content may be reduced from design contents with approval of the District Laboratory Engineer.


Section 304 Lime Treatment

304.07.2 Type C Compact to 93.0 percent of maximum dry density. When conditions, such as a yielding subgrade, make this impractical or

detrimental, establish an optimum rolling pattern to the satisfaction of the engineer.

304.07. 4 Type E Compact to 95 percent of maximum dry density. When traffic conditions warrant

When an adequate rolling pattern has been established that has demonstrated that density is being achieved, the engineer may reduce density frequency testing requirements to expedite construction.

A change in subgrade materials will require testing at the original frequency until a new rolling pattern is established.

Added for safety issue for two lane roadways.


Section 304 Lime Treatment

304-01 Lime Ton (Mg)

304-02 Lime Treatment (Type B) Square Yard

304-03 Lime Treatment (Type C) Square Yard

304-04 Lime Treatment (Type D) Square Yard

304-05 Lime Treatment (Type E) Ton

304-06 Lime Treatment (Type E) Square Yard


Section 305 Subgrade Layer

305.04.1.2 Treatment

When the contractor elects to use Portland-Pozzolan Cement the rate of cement shall be determined at the contractor’s expense.

The design compressive strength criteria - 100 psi.

P.I. Percent by Volume

0-15 9 6 % cement

16-25 6 % lime and 9 6 % cement

26-35 9 % lime and 9 6 % cement


Section 306 Scarifying and Compacting Roadbed

No major changes

Section 307 Permeable Bases

No major changes

Section 308 In-Place Cement Treated Base Courses

Deleted and combined with 303


Section 309 In-Place Cement Treated Subgrade (new) 309.02.1 Description

primarily used for existing roadway reconstruction

typically for subgrade soils with a PI < 20

design compressive strength criteria: 100 psi

309.02.1 Determination of Cement Rate

303.02.1.1 Predetermined - Plan Specified

303.02.1.2 Non-Predetermined - District Laboratory

303.02.1.3 Contractor Selected Cement Type – Contractor expense

If the contract documents do not specify a percent cement, 6 percent will be used for treated subgrades for bid purposes.


Section 309 In-Place Cement Treated Subgrade 309.04.1 Treatment and Pulverization

When field conditions warrant: Yielding subgrade: establish an optimum rolling pattern to the

satisfaction of the engineer. Wet subgrade: The engineer has the option of increasing or

decreasing the percentages of cement. Increase the cement content by one percent by volume for

every 3 percent of moisture content above optimum. When traffic conditions warrant

When an adequate rolling pattern has been established that has demonstrated that density is being achieved, the engineer may reduce density frequency testing requirements to expedite construction.

A change in subgrade materials will require testing at the original frequency until a new rolling pattern is established.

Part IV: Surface Courses

401 Aggregate Surface Course

402 Traffic Maintenance Aggregate Surfacing

403 Aggregate Roadway Surfacing


401 Aggregate Surface Course 401.04 Shoulder Construction

On existing surfaces, where only aggregate surface course is to be placed, remove vegetation, shape and satisfactorily compact the surface prior to placing aggregate surfacing.

For new or reconstructed surfaces construct subgrade in accordance with Section 203

401.07.2 Aggregate Surfacing Stone and Recycled Portland Cement Concrete (Material specifically defined)

401.07.4 Lime Treated Materials Sand-Clay-Gravel (Material specifically defined)


Section 402 Traffic Maintenance Aggregate Surfacing 402.01 DESCRIPTION Furnish and construct surfacing for maintenance of traffic on

driveways, pipe crossings, short term traffic on raw embankment, slope corrections, or other disturbed roadway sections ….

402.02 MATERIALS Stone Recycled Portland Cement Concrete Reclaimed Asphaltic Pavement Asphalt Concrete Flowable Fill (excavatable) Other materials must be approved in advance


Section 402 Traffic Maintenance Aggregate

402.01.1 Mainline Surfacing - in accordance with Table 402-1 at the posted speed limit during construction.

Aggregate surface is allowed only when all aggregate table criteria are met.

Hard surface is required when any of hard surface table criteria is met.

Surface Type ADT Posted Speed mph

Time Surfacing to Remain in Place Under Traffic

Aggregate 5000 or Less 45 or less 4 weeks or Less1

Hard Surface

Greater than 5000

Greater than 45 Greater than 4 weeks


Section 402 Traffic Maintenance Aggregate 402.01.1 Mainline Surfacing

Hard surface Asphaltic Concrete or Flowable Fill 6 inches minimum ½” longitudinal tolerance and properly drain Asphalt Concrete :89 percent of maximum density

Should a contractor’s operation or sequence of construction extend the time an aggregate surface is to remain in place under traffic beyond four weeks, hard surfacing will be at no additional pay.

Should a contractor’s operation or sequence of construction necessitate the use of aggregate in areas requiring hard surface, place the hard surface within 48 hours. Placement of aggregate surfacing in this case will be at no direct pay.


Section 402 Traffic Maintenance Aggregate

402.01.2 Non-mainline surfacing

Use either aggregate or hard surfacing for turnout, drives, crossovers and other non-mainline segments of roadway. If hard surfacing is used it shall meet the requirements of 402.01.1.


402.06 PAYMENT Aggregate materials reused by blading to adjacent locations will be

at the contractor’s expense.

Aggregate material reloaded, hauled, and re-used will be paid at 50 percent of the contract unit price.

402-01 Mainline Traffic Maintenance Surfacing Cubic Yard (Aggregate) (Vehicular Measurement) 402-02 Mainline Traffic Maintenance Surfacing (Hard) Square Yard 402-03 Non-Mainline Traffic Maintenance Surfacing Cubic Yard (Aggregate) (Vehicular Measurement)

MARK MORVANT, P.E. ASSOCIATE DIRECTOR, RESEARCH

Questions?

ladotd construction specifications: parts ii, iii & iv

Documents