PART 1 - GENERAL - Rochester City School District
PART 1 - GENERAL
1.1 Work of this section includes:
.1 Provide new topping at parking areas and driveways as indicated on
drawings.
1.2 Submittals
.1 Material Certificates - Provide copies of materials certificates signed
by material producer and Contractor, certifying that each material item complies with, or exceeds specified requirements.
1.3 Quality Assurance
.1 Codes and Standards - Comply with New York State, Department of
Transportation Standard Specifications, latest edition and with local governing regulations if more stringent than herein specified.
.2 Site Conditions - Apply prime and tack coats when ambient
temperature is above 50°F, and when temperature has not been below 35°F for 12 hours immediately prior to application. Do not apply when base is wet or contains an excess of moisture.
PART 2 - PRODUCTS
2.1 Materials
.1 General - Use locally available materials and gradations which exhibit
a satisfactory record of previous installations.
.2 Composition of mixtures, material grade, designations and mixing
temperature shall comply with Table 401-1, NYSDOT Standard Specifications as follows:
a. Top Course - Type 8; dense gritty texture for urban streets.
.3 Tack Coat - Emulsified asphalt prior to dilution shall be one of the
following grades and material designations:
a. HFMA-2h 702-3401
b. SS-1H 702-3601
c. CSS-1h 702-4501
Dilute bituminous material with an equal volume of clean, potable water and thoroughly mixed into a homogenous liquid.
.4 Lane Marking Paint - Chlorinated, rubber-alkyd type, AASHTO M 248
(FS TT-P-115), Type III.
PART 3 - EXECUTION
3.1 Surface Preparation
.1 Remove existing pavement in areas where deteriorated to provide
solid substantial base; provide base patch or filler where required for this purpose. Saw cut prior to removal at edges of paving scheduled to remain. Protect adjacent building and improvements from removal operations and spillage for paving materials. Restore/ replace other work damaged by installation of paving work.
.2 Shave existing topping course 10 feet minimum from perimeter of
existing concrete sidewalks, curb cuts, aprons and where indicated on drawing. Pitch new topping course level to existing site features.
.3 Tack Coat - Apply to contact surfaces of existing top course,
previously constructed asphalt concrete and surfaces abutting asphalt concrete pavement. Distribute at a rate of 0.10 to 0.15 gal. per sq.yd. of surface. Allow the tack coat to dry until at proper condition to receive new paving.
3.2 Placing Mix
.1 Place asphalt concrete mixture on prepared surface. Spread mixture
within specified temperature range. Place each course to required grade, cross section and compacted thickness.
a. Top Course - 2" compacted thickness except as indicated.
.2 Spreading, finishing and compacting of paving shall comply with
NYSDOT Standard Specifications and as follows:
a. Place in strips not less than 10' wide nor greater than 25' wide
whenever practical. After first strip has been placed and rolled, place succeeding strips and extend rolling to overlap previous strips.
b. Begin rolling when mixture will bear roller weight without
excessive displacement. Provide the minimum number of passes specified in Table 401-3, NYSDOT Standard Specifications. Provide additional passes as required until all ruts, ridges, roller marks or other irregularities are removed from the surface. Along curbs and in other locations where roller is impractical, provide compaction in accordance with NYSDOT with either a hot hand tamper or vibrating plate compactor.
c. Tolerances - In-place compacted thickness will not be accepted
if exceeding variation as follows:
a. Top Course - ¼”
3.3 Traffic Lane Markings
.1 Sweep and clean surface to eliminate loose material and dust.
.2 Use chlorinated-rubber base traffic lane-marking paint factory-mixed,
quick-drying and non-bleeding, white.
.3 Provide markings for parking spaces, traffic direction and as
indicated on the drawings. Do not apply paint until layout and placement has been verified with Project Architect.
.4 Apply paint with mechanical equipment to produce uniform straight
edges. Apply in two (2) coats at manufacturer's recommended rates.
3.4 Field Quality Control
.1 Surface Smoothness - Test finished surface of asphalt concrete top
course for smoothness, using 10' straight edge applied parallel with and at right angles to centerline of paved areas. Surfaces will not be acceptable if top coat smoothness exceeds ¼" in any direction.
END OF SECTION
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