321216 Bituminous Concrete Pavement.pdf

Steam Supply and Condensate Bituminous Concrete Pavements Return Piping Replacement 321216 - 1 PGRU, Geneva, NY

SECTION 321216

BITUMINOUS CONCRETE PAVEMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Bituminous concrete paving.

B. Related Documents: The Contract Documents, as defined in Summary of Work, apply to the

Work of this Section. Additional requirements and information necessary to complete the Work of this Section may be found in other Documents.

C. Related Sections:

1. Section 312316 – Excavation and Fill

1.2 REFERENCES

A. New York State Department of Transportation (NYSDOT):

1. 2006 Standard Specifications and all related addenda.

B. American Society for Testing and Materials (ASTM):

1. ASTM D 3549 - Test Method for Thickness or Height of Compacted Bituminous Paving Mixture Specimens.

1.3 SYSTEM DESCRIPTION

A. Design Requirements: Provide asphalt-aggregate mixture as specified herein by NYSDOT to suit project conditions. Use locally available materials and gradations which meet NYSDOT specifications and exhibit satisfactory records of previous installations.

1.4 SUBMITTALS

A. Section 01330 - Submittal Procedures: Procedures for submittals.

1. Assurance/Control Submittals:

a. Design Data:

1) Submit DOT design mix following format indicated.

2) Provide design mixture listed in current edition of applicable NYSDOT specifications.

3) Use mix designs prepared within 3 years maximum.

Return Piping Replacement 321216 - 2 PGRU, Geneva, NY

4) Provide documentation of NYDOT limitations.

b. Certificates: Submit materials certificate to Testing Laboratory signed by material supplier and Contractor, certifying that materials comply with, or exceed, the requirements specified herein.

c. Qualification Documentation: Paving installer documentation of experience indicating compliance with specified qualification requirements.

1.5 QUALITY ASSURANCE

A. Perform Work in accordance with NYSDOT Standard Specifications.

B. Installer Qualifications: Company specializing in performing the Work of this Section with minimum 5 years satisfactory documented experience in similar public and commercial projects.

C. Regulatory Requirements:

1. Conform to applicable requirements for paving work on public property.

2. Maintain access for vehicular and pedestrian traffic as required for other construction activities. Use temporary striping, flagmen, barricades, warning signs, and warning lights as required.

1.6 PROJECT CONDITIONS OR SITE CONDITIONS

A. Jobsite Requirements:

1. Apply tack coat when ambient temperature is above 40 degrees F, and when temperature has been above 35 degrees F for 12 hours immediately prior to application. Do not apply when base is wet, contains excess moisture, or during rain.

2. Construct bituminous concrete paving when atmospheric temperature is above 40 degrees F.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Asphalt Concrete Paving: Conform to NYSDOT Section 403 for Hot Mix Pavements for Municipalities.

1. Top Course: NYSDOT, Table 403-1, Type 6.

2. Binder Course: NYSDOT, Table 403-1, Type 3.

B. Tack Coat: Conform to NYSDOT Standard Specifications.

2.2 EQUIPMENT

Return Piping Replacement 321216 - 3 PGRU, Geneva, NY

A. Maintain equipment in satisfactory operating condition and correct breakdowns in a manner that will not delay or be detrimental to progress of paving operations.

B. Provide adequate equipment for delivery, placement and finishing of pavements as to prevent avoidable delays in paving operations causing cold joints and irregularities in finished product.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verification of Conditions: Verify that field measurements, surfaces, substrates and conditions are as required, and ready to for earthwork operations to begin.

1. Verify gradients and elevations of base are correct, and base is dry.

B. Report in writing to the Owner prevailing conditions that will adversely affect satisfactory execution of the Work of this Section. Do not proceed with Work until unsatisfactory conditions have been corrected.

C. By beginning Work, Contractor accepts conditions and assumes responsibility for correcting unsuitable conditions encountered at no additional cost to the Owner.

D. Coordinate pre-paving meeting with the Owner’s representative to review phasing, paving schedule, available equipment, routes of egress for equipment for all phases of paving operations from subbase and grading work through pavement placement .

3.2 BASE COURSE PLACEMENT

A. Perform base course construction in a manner that will drain surface properly at all times and at the same time prevent runoff from adjacent areas from draining onto base course construction.

3.3 APPLICATIONS

A. Tack Coat:

1. Apply to contact surfaces of previously constructed bituminous concrete base courses or portland cement concrete and surfaces abutting or projecting into bituminous concrete or into bituminous concrete pavement.

2. Apply tack coat to bituminous concrete base course or sand asphalt base course. Apply emulsified asphalt tack coat between each lift or layer of full depth bituminous concrete and sand asphalt bases and on surface of all such bases where bituminous concrete paving will be constructed.

3. Apply emulsified asphalt tack coat in accordance with applicable state highway specifications.

4. Apply at minimum rate of 0.05 gallon per square yard of surface.

5. Allow to dry until at proper condition to receive paving.

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3.4 BITUMINOUS CONCRETE PLACEMENT

A. Place bituminous concrete mixture on completed compacted subgrade surface, spread, and strike off. Spread mixture at following minimum temperatures:

1. When ambient temperature is between 40 degrees F and 50 degrees F, mixture temperature equal to 285 degrees F.

2. When ambient temperature is between 50 degrees F and 60 degrees F, mixture temperature equal to 280 degrees F.

3. When ambient temperature is higher than 60 degrees F, mixture temperature equal to 275 degrees F.

B. Whenever possible, all pavement shall be spread by a finishing machine; however, inaccessible or irregular areas may be placed by hand methods. The hot mixture shall be spread uniformly to the required depth with hot shovels and rakes. After spreading, the hot mixture shall be carefully smoothed to remove all segregated course aggregate and rake marks. Rakes and lutes used for hand spreading shall be of the type designed for use on asphalt mixtures. Loads shall not be dumped faster that they can be properly spread. Workers shall not stand on the loose mixture while spreading.

C. Paving Machine Placement: Apply successive lifts of bituminous concrete in transverse directions with the surface course placed in the direction of surface-water flow. Place in typical strips not less than 10 feet wide.

D. Joints: Make joints between old and new pavements, or between successive days and work in a manner that will provide a continuous bond between adjoining work. Construction joints shall have same texture, density, and smoothness as other sections of bituminous concrete course.

Clean contact surfaces of all joints and apply tack coat. Avoid utilizing stones resulting from lutes in joint, if necessary utilize broom to brush asphalt fines into open joints.

3.5 ROLLING AND COMPACTION

A. The mixture, after being spread, shall be thoroughly compacted by rolling as soon as it will bear the weight of the rollers without undue displacement. The number, weight, and types of rollers and sequences of rolling operations shall be such that the required density and surface are consistently attained while the mixture is in a workable condition.

B. Compact mixture with hot hand tampers or vibrating plate compactors in areas inaccessible to rollers.

C. Breakdown Rolling: Accomplish breakdown or initial rolling immediately following rolling of joints and outside edge. Check surface after breakdown rolling, and repair displaced areas by loosening and filling with hot material.

D. Second Rolling: Follow breakdown rolling as soon as possible, while mixture is hot. Continue second rolling until mixture has been thoroughly compacted.

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E. Finish Rolling: Perform finish rolling while mixture is still warm enough for removal of roller marks. Continue rolling until roller marks are eliminated and course has attained maximum density.

F. Patching: Remove and replace paving areas mixed with foreign materials and defective areas.

Cut out such areas and fill with fresh, hot bituminous concrete. Compact by rolling to maximum surface density and smoothness.

G. Protection: After final rolling, do not permit vehicular traffic on pavement until it has cooled and hardened. Erect barricades to protect paving from traffic until mixture has cooled enough not to become marked.

3.6 CONSTRUCTION

A. Site Tolerances:

1. Paving Surface Smoothness: Maximum allowable 10 foot straightedge tolerance for smoothness.

a. Base Course Surface: 1/4 inch.

b. Wearing Surface Course: 3/16 inch.

END OF SECTION