SECTION 411
3.4 Placing shall conform to 401.3.10 with the following modifications:
3.4.1 The existing pavement shall be thoroughly dry and free from all dust, dirt, and loose material. Sweeping with a power
broom supplemented by hand brooming may be required.
3.4.2 Existing pavement shall be treated with tack coat as prescribed in 410.3.4. When ordered, the existing pavement shall
be treated as prescribed in 410.3.3.
3.4.3 A leveling course of hot bituminous concrete may be ordered to prepare the pavement for the finish course.
3.4.4 Any material delivered to the paver having a temperature lower than 260° F shall not be used unless modified bya
qualified warm mix technology capable to being compacted to project requirements at the recommended delivery temperature.
3.4.5 Inthose areas where the edges of the pavement are adjacent to paved or bituminous treated shoulders, the asphalt paving
machine shall be equipped to produce a feathered edge, parallel to the direction of traffic, and a uniform longitudinal line shall be
maintained at the outer edge of the applied pavement.
3.4.6 All bridges included within the limits of the work shall be treated curb to curb.
3.4.7 | When AC Paver Shim is specified, in areas of extreme deformation of the existing roadway, some amount of dragging
is expected in placing this wearing course.
3.4.8 | When Spot Drag Shims are specified, the intent is to fill and level localized ruts and deformations in the pavement. An
8” paver shall be used. Spots to be shimmed will be marked out by the Engineer. The length and widths of the spots will vary. It
is expected that in most cases the pavement marking stripes will not be covered. Each spot shall be tacked before paving. Edges
of shimmed areas shall be feathered by the paver. Luting or squaring up the ends of each spot will not be required.
3.5 Compaction shall conform to 401.3.12 with the following modifications:
3.5.1 If necessary to prevent traffic pickup of the mixture, the surface of the work shall be given a light dusting of blotter
material just prior to rolling with a pneumatic-tired roller. The surface shall be maintained thereafter by occasional back sanding
and rolling as directed.
3.5.2 When more than 125 tons of mixture are being placed per hour, an additional steel-wheeled roller will be required.
3.5.3 Excess blotter material remaining on the pavement and on paved shoulders shall be removed prior to acceptance of the
project.
3.5.4 After rolling has been completed, the edges of the pavement shall be trimmed as directed to secure a uniform line.
3.6 The finished surface of the pavement shall be uniform in appearance, shall be free from irregularities in contour, and shall
present a smooth-riding surface.
Method of Measurement
4.1 Plant mix surface treatment will be measured as prescribed in 401.4,
4.2 Blotter material used on plant mix surface treatment will be subsidiary.
Basis of Payment
5.1 The accepted quantities of leveling course and plant mix surface treatment will be paid for at the Contract unit price per ton,
complete in place.
5.1.1 Tack coat material required under 3.4.2 will be subsidiary to the leveling course and plant mix surface treatment items.
Pay items and units:
411.1 Hot Bituminous Concrete Leveling Course Ton
411.15 Hot Bituminous Concrete Leveling Course, Aggregate 50 Percent Wear Ton
411.19 Hot Bituminous Concrete Leveling Course (Night) Ton
411.3 Plant Mix Surface Treatment (AC), Paver Shim Ton
411.43 Plant Mix Surface Treatment(Asphalt Cement), 3/8 in Ton
411.46 Plant Mix Surface Treatment(Asphalt Cement), 3/4 in Ton
| 411.51 Plant Mix Surface Treatment, Paver Spot Drag Shim | Ton
2016 NHDOT
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