SECTION 401
thickness to retain heat and to protect it from weather conditions. The cover material when new shall weigh a minimum of 18
oz/yd? and it shall be a tightly woven or solid material. When necessary, so that the mixture can be delivered on the project at
the specified temperature, truck beds shall be insulated, and covers shall be securely fastened.
3.10 Placing — General.
3.10.1 Prior to placing of any mix, a pre-paving conference shall be held to discuss and approve the paving schedule, source
of mix, type and amount of equipment to be used, sequence of paving pattern, rate of mix supply, traffic control, and general
continuity of the operation. Special attention shall be made to the paving pattern sequence to minimize cold joints. The field
supervisors of the above mentioned operations shal! attend this meeting.
3.10.2 The Contractor shall notify the Engineer at least five working days in advance of paving operations to allow sufficient
time to schedule required site inspection and testing. All paving and compaction equipment shall be approved and on site prior
to start up each day.
3.10.3 Crack sealing material to be covered by a 1” or less overlay shall cure a minimum of 45 days prior to the placement
of bituminous pavement.
3.10.4 Base course pavement lifts shall not exceed the maximum compacted thickness of 5 inches. Any course exceeding 5
compacted inches shall be placed in 2 passes.
3.10.5 When performing paving operations at night, in addition to the requirements of 3.1.4.5, the Contractor shall provide
sufficient lighting at the work site to ensure the same degree of accuracy in workmanship and conditions regarding safety as
would be obtained in daylight.
3.10.6 Performance Requirements (QC/QA). The Contractor shall provide the following equipment for testing and sampling
at the project site. The equipment shall be in good condition and shall be replaced by the Contractor if, during the duration of the
project, it becomes unsuitable for testing or sampling purposes.
3.10.6.1 Metal plate 12” minimum each side, flat bottom scoop 3000-gram capacity minimum, and sample containers to
perform NHDOT B-7 sampling.
3.10.7 Weather Limitations.
3.10.7.1 General. In special instances, when the Engineer determines that it is in the best interest of the State, the Engineer
may waive the requirements of 3.10.7, provided that 3.10.7.3 shall always remain in effect.
3.10.7.2 Any material delivered to the spreader having a temperature lower than 260°F shall not be used unless modified
by a qualified warm mix technology capable of being compacted to project requirements at the recommended delivery
temperature.
3.10.7.3 Mixtures shall be placed only when the underlying surface is dry and frost free. The Engineer may permit, in case
of sudden rain, the placing of mixture then in transit from the plant, if laid on a base free from pools of water, provided motorist
visibility is not impaired and all other specifications are met. No load shall be sent out so late in the day that spreading and
compaction cannot be completed during the daylight, unless the requirements of 3.10.5 are met. The Engineer may suspend
operations for the day when the Contractor is unable to meet specifications.
3.10.7.4 All mix placed after October 1% and before May 1* shall be modified by a qualified warm mix technology.
3.10.7.4.1 Wearing course shall not be scheduled for placement after October 1st and before May 1“ without written
approval by the Engineer.
3.10.8 At the beginning and end of the project or project section, the existing pavement shall be removed to a sufficient depth
to allow the placing of the new pavement and construction of a transverse joint, which shall be painted with a suitable bituminous
material. The underlying course shall be clean and free from foreign materials and loose bituminous patches and must present a
dry, unyielding surface.
3.10.9 Sweeping - General. Existing pavement or previously laid courses shall be thoroughly dry and free from all dust,
dirt, and loose material. Sweeping with a power broom, supplemented by hand brooming, may be necessary.
3.10.10 Tack coat - General. Surfaces of any pavement course shall have a tack coat of emulsified asphalt applied in
accordance with the requirements of 410.3.4.
3.10.10.1 Tack will be sampled daily and tested by NHDOT for conformance with Section 410. Any pavement that has
been placed over tack that is found to be out of specification, but is deemed suitable to remain in place by the Engineer, will be
subject to a 3% price reduction. The price reduction will be applied only to the pavement placed on the date that the tack is
2016 NHDOT
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