57-Sec 32 12 00 - Asphalt Paving.pdf
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- Montgomery County, Pennsylvania
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This is a technical specification document for asphalt paving work prepared for Montgomery Township, Pennsylvania, detailing the requirements and standards for asphalt paving of roadways, parking areas, and walking paths. The specification references Pennsylvania Department of Transportation (PennDOT) standards, including Publication 408 Specifications and Publication 27 for Bituminous Mixtures, and requires compliance with applicable Township standards for paving work on public property. The work encompasses base course, binder course, and wearing course asphalt placement using PennDOT Superpave materials, subbase course installation with coarse aggregate, tack coat application, and joint sealing with hot asphalt material. Environmental requirements mandate that asphalt placement only occur when base surface temperature is minimum 40 degrees Fahrenheit and the surface is dry and not frozen. The specification establishes strict tolerances for flatness (maximum 1/4 inch variation measured with 10-foot straight edge), compacted thickness (within 1/4 inch of design thickness), and elevation variation (within 1/2 inch).
The specification requires material certifications from asphalt and aggregate suppliers attesting to conformance with State Specifications, with particular attention to wearing course applications that will receive color coats, which must utilize virgin asphalt containing no more than 15 percent recycled asphalt pavement (RAP) and zero percent recycled asphalt shingles (RAS). Contractor responsibilities include restoration of any existing paving damaged during operations to original condition at no additional cost to the Township, verification of subgrade condition through proofrolling with a 10-ton roller, and application of tack coat prior to overlay placement or course transitions. Compaction equipment requirements vary by application, with 10-ton rollers specified for standard work and minimum 5-ton rollers permitted in trenches, with hand compaction required for areas inaccessible to rolling equipment.
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Text version
ASPHALT PAVING
32 12 00-1
SECTION 32 12 00
PART 1 GENERAL
1.01 SECTION DESCRIPTION
A. The Work of this Section Includes:
1. Asphalt paving of roadways, parking areas and walking paths.
1.02 SYSTEM DESCRIPTION
A. Paving: Asphalt mixes designed for traffic anticipated on the roadways
1.03 RELATED SECTIONS
A. Section not used.
1.04 QUALITY ASSURANCE
A. Reference Standards:
1. Pennsylvania Department of Transportation:
a. Publication 408 Specifications
b. Publication 27 – Specification for Bituminous Mixtures (Bulletin 27)
B. Mixing Plant: Conform to PennDOT Bulletin 27, chapter 1 Standards.
C. Conform to applicable Township standards for paving work on public property.
1.05 SUBMITTALS
A. Certificates: Submit certification from asphalt and aggregate suppliers attesting that materials conform to the State Specifications in accordance with Section 01 33 00.
1.06 ENVIRONMENTAL REQUIREMENTS
A. Do not place asphalt when base surface temperature is less than 40 degrees F or base surface is wet or frozen.
1.07 JOB CONDITIONS
A. Restore existing paving outside the limits of the Work that is damaged by Contractor’s operations, to its original condition at the expense of Contractor.
PART 2 PRODUCTS
2.01 PAVING MATERIALS
A. Base Course: PennDOT Superpave (Section 313 of Publication 408).
B. Binder Course: PennDOT Superpave (Section 413 of Publication 408).
C. Wearing Course: PennDOT Superpave (Section 413 of Publication 408).
1. Wearing Course for surfaces to receive color coat (e.g. Pickleball Court) shall be virgin asphalt with no more than 15% RAP and no (0%) RAS.
D. Tack Coat: Class TACK or NTT/CNTT: per Section 460 of PennDOT Publication 408
E. Joint Seal: PG 64S-22, Hot asphalt material (Section 702 of Publication 408).
2.02 SUBBASE COURSE MATERIALS
A. Coarse Aggregate: PennDOT No. 2A (Section 703 of Publication 408).
32 12 00-2
2.03 PAINTING MATERIALS
A. Section 962, PennDOT Publication 408.
B. Section 32 18 23.53 for Color Coat
PART 3 EXECUTION
3.01 EXAMINATION AND PREPARATION
A. Verify gradients and elevations of area to be paved.
B. Trim existing paving with minimum one (1) foot cutbacks to remove damaged areas. Cut straight joint lines and right angle offsets.
C. Remove any temporary paving material.
D. Proofroll subgrade (10 ton roller) and replace any soft or unsuitable material with coarse aggregate.
Verify compacted subgrade is dry and ready to support paving and imposed loads.
E. Apply tack coat in accordance with PennDOT Publication 408 requirements prior to placing an overlay over existing paving or prior to placing a wearing course over a previous placed binder course.
F. Coat surfaces of any manhole or catch basin frames with oil to prevent bond with asphalt paving.
3.02 SUBBASE COURSE
A. Place PennDOT No. 2A coarse aggregate in continuous layers not exceeding 6 inches loose depth and compact (10 ton roller) to required contours and elevations.
3.03 PLACING ASPHALT PAVEMENT
A. Place asphalt base course on surface of compacted subbase course to compacted thickness (10 ton roller where possible; minimum 5 ton roller in trenches) as shown on Drawings.
B. Place binder and wearing courses to compacted thicknesses (10 ton roller except minimum 5 ton roller for binder course in trenches) as shown on the Drawings.
C. Apply tack coat before placing Leveling/Scratch Course and before placing Superpave Wearing Course should there be a delay between completion of Leveling/Scratch Course and Superpave Wearing Course.
D. Place wearing course overlay to compacted thickness (10 ton roller) as and where shown on the Drawings.
E. Compact pavement by rolling to achieve even and smooth finish, without roller marks. Hand compact in areas inaccessible to rolling equipment.
F. Where proposed asphalt paving adjoins existing asphalt paving, seal the joint with hot asphalt material in accordance with PennDOT Publication 408 requirements.
G. Provide painted markings where shown on Drawings.
3.04 TOLERANCES
A. Flatness: Maximum variation of 1/4 inch measured with 10 foot straight edge.
B. Compacted Scheduled Thickness: Within 1/4 inch of design thickness.
C. Variation from True Elevation: Within 1/2 inch.
END OF SECTION
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