SECTION 404
Requirements for Pavement Joint Adhesive
Property Test Method Requirement
Cone Penetration, 25°C ASTM D 5329 60 -100
“Flow,60°C ASTM D 532900 Ss mm maximum
“Resilience, 25°C = ASTM 532900 30% minimum
‘Ductility,4¢C ASTM D113 30 cm minimum ~
“Tensile Adhesion, 25°C ASTM D5329) 500% minimum
SofteningPoint = = = ASIMD36 9 77?Cminimum —
Asphalt Compatibility = ==ASTMD5329 ——séPass—
Construction Requirements
3.1 Mixing Plants.
3.1.1 General.
e Coarse aggregates shall be furnished in at least two nominal sizes for mix types containing top size
aggregates of 1/2” and larger.
@ RAP shall be fed into the plant by equipment specifically designed for recycling and approved by the
Bureau of Materials and Research. In addition, all requirements pertaining to aggregates shall apply to
RAP. Scalping screens, grizzlies, or similar devices shall be installed on the RAP feed bin(s) to remove
any debris or other foreign materials in excess of 2”. If a drum mix plant is used, the RAP shall be fed
into the drum so that it will not come in direct contact with the burner flame. Mixing of RAP with the
new aggregate shall occur before the bituminous material introduction point. The final mix produced
shall be visually free from any chunks of RAP.
e Plants shall be approved at least five days prior to operations and will be capable of maintaining an
adequate supply of mixture to the project.
3.1.2 Method Requirements.
e The site shall have ample storage space for the required separate bins, stalls, or stockpiles to allow
delivery of uncontaminated sized aggregates to the feeder. To prevent spillage from one pile or bin to
the next, aggregate assigned to different stockpiles shall be separated by bulkheads or other satisfactory
means.
e Stockpiles of coarse aggregate produced for use in drum mix plants having top size aggregates greater
than 3/4” shall be constructed in layers not to exceed 4 ft.
e All blending of aggregates shail be accomplished through separate bins at the cold elevator feeders and
not in stockpiles.
e The plant shall be provided with a dust collector or collectors, designed to waste or return uniformly to
the hat elevator all or part of the material collected, as directed. All plants shall have adequate covers
and housing as may be necessary to ensure the proper collection of dust and the general cleanliness of
the plant operation. The Contractor shall comply with all State and Federal environmental regulations.
3.1.3 Performance Requirements (QC/QA).
Mixing plants shall conform to AASHTO M 156. An efficient dust collecting system shall be provided to prevent the loss
of fine material. The material collected may be returned to the mixture at a uniform rate or discarded.
3.1.4 Safety Requirements for Inspection — General.
3.1.4.1 Adequate and safe stairways to the mixer platform shall be provided, and guarded ladders to other plant units shall
be located where required for accessibility to plant operations.
3.1.4.2 All gears, pulleys, chains, sprockets, and other dangerous moving parts shall be thoroughly guarded and protected.
3.1.4.3 Ample and unobstructed space shall be provided on the mixing platform. The plant operator shall have a clear and
unobstructed view of the plant operations.
3.1.44 A platform shall be located in close proximity to the inspector’s laboratory for the purpose of easily obtaining
samples of the mixture from the trucks.
2016 NHDOT
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Division 500 = Division 600 = Division 700 Specifications
