Home Improvement Siding Kitchen Windows Vinyl Pools Patio Security 0213

Section 23 – Asphalt Concrete

ASPHALT CONCRETE PLACEMENT METHOD

Unless otherwise specified in the Special Provisions, asphalt concrete shall be placed as

specified in this Section.

For asphalt concrete placed on minor streets, asphalt concrete may be placed in a single lift

up to three inches (3”) thick. For major streets, the top layer of asphalt concrete shall be placed

in a lift no less than one and one-half inches (1-1/2”) and no greater than two and one-half

inches (2-1/2”) in compacted thickness. The next lower layer of asphalt concrete shall be

placed in a lift no less than one and one-half inches (1-1/2”) and no greater than three inches

(3”) in compacted thickness. All other lower layers shall be placed in lifts no greater than four

inches (4”) in compacted thickness.

The total thickness of asphalt concrete shall be as shown on the plans with the following

exception for asphalt concrete paving in the vicinity of sidewalk ramps. For the area of

pavement that is no greater than twelve feet wide and adjoins the lip of gutter of a sidewalk

ramp, new asphalt concrete paving shall be allowed to be constructed with a pavement

thickness that is up to three-quarters of an inch (3/4”) less than the thickness of the asphalt

concrete pavement section shown on the plans (seeStandard Drawing 4-23C).

Paving work shall be a continuous non-stop operation with delivery trucks arriving in a

uniform manner. The Agency has the authority to adjust paver speed if, in the Agency’s

opinion, the work is not progressing in a uniform manner. The Agency will meet daily with the

Contractor to evaluate the Contractor’s operations relative to the work time restrictions.

The asphalt concrete shall be delivered to the site in a thoroughly blended condition and

shall be spread by a self-propelled asphalt paving machine in such a manner as to avoid

segregation during the placing operations. Initial rolling shall be performed immediately after

placement. No asphalt concrete shall be placed when the atmospheric temperature is below

50°F, except as follows:

When asphalt concrete is placed as a base course, the asphalt concrete may be

placed when the ambient temperature is 40°F and rising, if the material is deposited

directly into the hopper of the paving machine.

No paving work whatsoever shall be allowed when the roadway is moist or damp.

No paving work whatsoever shall be allowed when it is raining. For the purpose of

this provision, "raining" shall mean any weather condition that causes the roadway to

become moist or damp. In the case of sudden precipitation, all paving work must

stop immediately, all asphalt concrete on site not yet placed and all asphalt concrete

in transit from the plant shall be rejected and no payment will be allowed.

Any time new asphalt concrete is to be placed in contact with existing asphalt concrete, the

surface shall be cleaned and a tack coat of asphaltic emulsion shall be applied to ensure proper

bond. Asphaltic emulsion shall be applied to vertical edges of any existing pavement, curbs,

and gutters adjoining the area to be paved. Asphaltic emulsion shall be of the high viscosity

type subject to the approval of the Agency, and shall conform to Sections 39 and 94 of the State

Unless otherwise specified in the Special Provisions or these Specifications, the minimum

compacted thickness of asphalt concrete shall be the thickness shown on the Plans. The

tolerance for minimum thickness for all operations shall be 0.01 feet. The tolerance for

maximum thickness for asphalt concrete structural sections less than 0.35 feet thick shall be

0.02 feet, and for sections more than 0.35 feet thick shall be 0.03 feet.