321216 asphalt paving.doc

SECTION 32 12 16

ASPHALT PAVING

PART 1 – GENERAL

1.01 Related Documents

A.

Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section, including – but not limited to – the following.

1.

Division 01 – General Requirements: Testing procedures.

1.02 Summary

The Work of this Section includes:

Preparing subgrade to receive base course.

2.

Installing underdrain system.

3.

Placing and compacting aggregate base course.

Placing and compacting bituminous base course.

4.

[Priming aggregate base course and placing] [Placing] asphalt pavement [(intermediate and surfaces courses)].

5.

Applying seal coat.

B.

Related Requirements:

Section 09 99 00 – Painting and Coating: Paint lines and marking.

Section 31 22 00 – Grading: Rough grading.

Section 32 13 13 – Concrete Paving: Concrete curbs, walks, and drives.

Section 32 17 23 – Pavement Markings: Paint lines and marking.

Section 33 05 13 – Manholes and Structures: Storm and sanitary manholes, catch basins, and inlets.

1.03

REFERENCES

ASTM International:

Standard Specification for Road Tar (ASTM D‑490‑92 (Reapproved 1997)).

Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft‑1bf/ft3 (600 kN‑m/m3)) (ASTM D‑698‑00a).

Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 lb‑lbf/ft3 (2,700 kN‑m/m3)) (ASTM D‑1557‑00).

Standard Test Methods for Density of Soil and Soil‑Aggregate in Place by Nuclear Methods (Shallow Depth) (ASTM D‑2922‑96e1).

Standard Test Methods for Emulsified Bitumens Used as Protective Coatings (ASTM D‑2939‑98).

6.

Standard Test Method for Density of Bituminous Concrete in Place by Nuclear Methods (ASTM D‑2950‑91 (Reapproved 1997)).

7.

Standard Specification for Emulsified Coal‑Tar Pitch (Mineral Colloid Type) (ASTM D‑3320‑00).

8.

Standard Test Methods for Minimum Index Density and Unit Weight of Soils and Calculation of Relative Density (ASTM D‑4254‑00).

B.

State of [Ohio] [___________] Department of [Transportation [(ODOT)]] [____________]: [Latest edition of Construction and Material Specifications (ODOT CMS)] [Specifications and standards].

B.

Commonwealth of Pennsylvania Department of Transportation (PENNDOT): Construction Specifications (Publication 408/2003).

C.

[City of [____________] [Local] Department of [Transportation] [____________]: Specifications and standards].

1.04

SUBMITTALS

A.

General: Submit the following per the General Requirements.

B.

Informational Submittals (Test Reports): Submit field density reports.

1.05 Project Conditions

Environmental Requirements:

Do not compact or roll the subgrade [or place or roll the aggregate base course] during inclement or rainy weather, or when conditions are not suitable for the work involved.

Do not place bituminous paving when pavement surface temperature is below 50‑degrees Fahrenheit, or when there is frost in the base, or any other time when weather conditions are unsuitable for the type of material being placed.

PART 2 – PRODUCTS

2.01

MATERIALS

A.

Pipe Underdrains: ODOT CMS Item 605 for pipe underdrain materials.

B.

Aggregate Base Course Materials: Conform to the requirements and gradation of [ODOT CMS Item 304, Aggregate Base] [PENNDOT Section 703.2, Course Aggregate].

C.

Bituminous Prime Coat: [Conform to ODOT CMS Item 408 for MC‑30 bituminous material] [PENNDOT Section 461].

D.

Bituminous Tack Coat: [Conform to ODOT CMS Item 407 for SS‑1 liquid asphalt emulsion material] [PENNDOT Section 460].

E.

Bituminous Base Course: Conform to ODOT CMS Item 301 for aggregate and bituminous material.

E.

Bituminous Concrete Base Course (Standard): PENNDOT Section 305.

F.

Bituminous Intermediate Course: Conform to ODOT CMS Items 446 and 448 for aggregate and cement materials.

G.

Bituminous Surface Course: Conform to ODOT CMS Items 446 and 448 for aggregate and cement materials.

G.

Bituminous Wearing Course ID‑2 (Standard): PENNDOT Section 420.

H.

Seal Primer: 100 gallons of pavement primer plus 200 gallons of water.

I.

Sealer: 100 gallons base coal tar emulsion plus ten gallons of water and 600 pounds of sand. (Conditions may require adjustment in quantity of water, maximum water is 15 gallons per 100‑gallon base.)

I.

Pavement Sealer: Refined coal tar emulsion prepared from high temperature refined coal tar per ASTM D‑490 (except oil and water gas tar).

Hot‑blended rubber fortifier into refined coal tar prior to emulsification.

Maximum water content: 48 percent to 53 percent maximum by weight.

Minimum solid content: 47 percent minimum to 52 percent by weight.

Ash of non‑volatiles: Between 30 and 40 percent.

Solubility of non‑volatiles in CS2: Minimum of 20 percent.

J.

Asphalt Curb Material: ODOT CMS Item 609.

K.

Guardrail Materials: ODOT CMS Item 606.

PART 3 – EXECUTION

3.01

PREPARATION

A.

Scarify subgrade, where asphalt pavement is to be placed, to a minimum depth of 6 inches.

B.

Water and thoroughly mix subgrade until optimum moisture content is obtained when deficiency of moisture content exists. When excess of moisture exists, rework and aerate subgrade until optimum moisture content is obtained.

C.

Before final rolling, shape entire section, add additional subsoil as required, and compact to provide grades, elevation and cross‑section indicated. Ensure points of finished subgrade surface are within 1 inch of elevations indicated.

D.

Compaction: Compact soil to not less than the following percentages of maximum density for soils which exhibit a well‑defined moisture density relationship (cohesive soils) determined per ASTM D‑1557; and not less than the following percentages of relative density, determined per ASTM D‑4254, for soils which will not exhibit a well‑defined moisture‑density relationship (cohesionless soils).

Pavements: Compact top 12 inches of subgrade and each layer of backfill or fill material at [98] [95] percent maximum density for cohesive material or [98] [95] percent relative density for cohesionless material.

E.

Install underdrains per ODOT CMS Item 605.

3.02

INSTALLATION

A.

Base Course: Furnish, place, and construct [bituminous] aggregate base per [ODOT CMS Item [301] [304]] [PENNDOT Section 703].

B.

Prime Coat Application: Apply bituminous prime coat on compacted [scarified] [aggregate] base course at an application rate of 0.50 gallons per square yard of surface.

C.

Tack Coat Application: Apply tack coat, diluted with water at the ratio of one‑to‑one, at an application rate between 0.05 and 0.15 gallons for each square yard.

D.

Placement of Asphalt Pavement:

Furnish, place, and construct asphalt pavement per [ODOT CMS Items 446 and 448] [PENNDOT Section 400, Flexible Pavements].

Place asphalt intermediate (binder) course within 24 hours of priming aggregate base course. Place surface course within twelve hours of placing and compacting intermediate (binder) course.

Place asphalt pavement within 24 hours of priming aggregate base course.

Place intermediate (binder) course to compacted depth [indicated] [of _____ inches]. Place surface course to a compacted depth [indicated] [of _____ inches].

Place asphalt pavement to compacted depth [indicated on the Drawings] [of _____ inches].

Furnish, place, and construct intermediate (binder) course per [ODOT CMS Items 446 and 448] [PENNDOT Section 400, Flexible Pavements].

Furnish, place, and construct surface course per [ODOT CMS Items 446 and 448] [PENNDOT Section 400, Flexible Pavements].

6.

Ensure joints between existing and new paving are straight, clean, vertical and free of broken or loose material. Prime vertical surfaces to ensure tight bond.

E.

Seal Coat Application:

Before sealing, wire brush grease and oil spots and scrub with a detergent. Clean entire surface of foreign material and flush with water.

Prime existing surface that receives refined coal tar emulsion sealer. Lightly dampen surface with water immediately prior to application. Do not prime new asphalt.

Apply two coats of sealer a minimum of 30 days after new asphalt or asphalt repair work is completed per the Sealer Manufacturer's instructions.

Over damp pavement, apply a uniform coating of material at a rate recommended by Sealer Manufacturer.

After above application has set, apply second uniform coat at right angle to the first, at a rate recommended by the Sealant Manufacturer. Do not apply two coats in the same day.

F.

Tolerances:

Ensure surface of completed asphalt pavement is true to lines, profiles and elevations indicated, and is free from depressions exceeding 1/4 inch when measured with a 10‑foot straight‑edge.

A deviation greater than 3/8 inch will not be accepted. Measurements shall be made at three random locations with the average allowable deviation being not over 1/4 inch.

G.

Asphalt Curbs: Furnish, place and construct asphalt curbing per ODOT CMS Item 609.

H.

Guardrail: Furnish, place and construct guardrails per ODOT CMS Item 606.

3.03 Field Quality Control

A.

Provide compaction tests for each 500 square yards of prepared subgrade [and for each 250 square yards of compacted aggregate base course].

A.

The Contractor will employ and pay for soil testing and inspection service for quality control testing during earthwork operations per the General Requirements. Allow testing service to inspect and approve subgrades and fill layers before further construction work is performed.

B.

If compaction tests indicate prepared subgrade [or compacted aggregate base course] does not meet specified requirements, remove the defective work, replace and re‑test at no additional cost to the [Government] [Owner].

3.04

PROTECTION

Do not permit vehicular traffic of any kind on paving until it has cooled and hardened, and in no case less than six hours after final rolling of bituminous paving.

END OF SECTIOn 32 12 16

32 12 16-6

ASPHALT PAVING

12910-330

Revised 3/2/09

12910-330

ASPHALT PAVING

32 12 16-5

Revised 3/2/09