SECTICN 401
sampled. This price reduction will not relieve the Contractor of responsibility for latent defects and/or gross mistakes as outlined
in section 107.14.
Palen
3.10.11 General - Drainage and utility structures within the limits of the pavement shall be set and raised in accordance with
the provisions of 64.3.4. Contact surfaces of the drainage and utility castings as ordered shall be painted with a thin coating of
suitable bituminous material.
3.11 Pavers.
3.11.1.1 Pavers shall be:
(a) Self-contained, power propelled units with adjustable vibratory screeds and full-width screw augers that reach
within 18” of the end plate for fixed-width paving.
(b) Heated for the full width of the screed.
(c) Capable of spreading and finishing courses of hot asphalt mix in widths at least 12” more than the width of one
lane.
(d) Equipped with a receiving hopper having sufficient capacity to ensure a uniform spreading operation.
(e) Equipped with automatic feed controls, which are properly adjusted to maintain a uniform depth of material ahead
of the screed.
(f) Capable of being operated at forward speeds consistent with satisfactory laying of the mix.
(g) Capable of producing a finished surface of the required smoothness and texture without segregating, tearing,
shoving, or gouging the mixture.
(h) Equipped with automatic screed controls with sensors capable of sensing the transverse slope of the screed, and
providing the automatic signals that operate the screed to maintain grade and transverse slope from a reference such
as a grade wire or ski type device, either a floating beam with a minimum length of 30 ft or sonic averaging with a
minimum length of 24 ft.
3.11.1.2 Material Transfer Vehicle (MTV).
An approved MTV shall be used to transfer the bituminous mix from the hauling equipment to the paver. The MTV shall
operate independently from the paver and shall be a commercially manufactured unit specifically designed for the transfer of
mix from the hauling equipment to the paver without depositing the mix on the roadway. It shail have the ability to swing the
discharge conveyor to reach the paver hopper. The MTV shall be designed so that the mix is internally remixed. The minimum
storage capacity of the MTV shall be 12 tons,
The MTV will only be required for mainline construction and straight ramps (does not include loop ramps, interim
connections, interim crossovers and side roads) when the section is a minimum of 600 tons per paver mobilization unless
otherwise approved by the Contract Administrator.
When the MTV passes over a bridge that is not a fill over structure it shall be as near to empty as possible. The MTV also
shall not exceed 5 miles per hour while on the bridge. If the Contractor proposes moving the MTV over a bridge with more than
a minimal amount of material in it, a proposal must be submitted to and approved by the Bureau of Bridge Design prior to the
placing of any mix. The submittal needs to show in detail the wheel and axle loading that will be placed on the bridge deck.
3.11.1.3 When patching existing pavement, the material shall be placed on the prepared clean underlying surface at the
locations designated and shall be spread to produce a smooth and uniform patch, The patch material shall be thoroughly
compacted and shall match the line and grade of the adjacent pavement.
3.11.1.4 Relatively small areas not accessible to the paver may be spread by hand, but extreme care shall be taken to create
a surface texture similar to the machine work. Surface material shall be spread by lutes and not by rakes,
3.1L.1.5 Unless otherwise authorized, the final wearing course shall not be placed until guardrail posts have been set and
general cleanup has been completed.
3.11.1.6 When hot bituminous bridge pavement is to be placed over barrier membrane, the placing temperature shall be as
specified in 338.3.3.5. A paver, mounted on rubber tracks or tires, shall be used to place the 1” base course unless this procedure
is found to cause damage to the membrane. When such damage is found to be evident, the hand method may be allowed, The
hand method may also be allowed if the Engineer determines that the use of a paver for this work is impracticable. During warm
weather, the above paving shall be done during the cool period of the day. A paver shall be used to place the wearing course.
3.11.1.7 Where pavement is placed adjacent to structural members such as expansion joints, the material in the top course
shall be placed so that the compacted grade of the pavement is 1/4 to 3/8” above the grade of the structural member.
3.11.1.8 When paving on aggregate base courses and/or base course pavement, the first pass paved shall be on the travel
way and on the shoulders.
2016 NHDOT
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