SECTION 401
close conformance with the lines, grades, thickness, and typical cross-sections shown on the plans, within the tolerances specified
or established by the Engineer.
1.4 These specifications provide for both method and quality control/quality assurance (QC/QA) specification work. Sections
under the heading Performance Requirements (QC/QA) are applicable on QC/QA items only. Sections marked Quality Control
(QC/QA) Method are applicable for non-QC/QA items and those portions of QC/QA items that are not measured for pay
adjustment. All sections under the heading General are for use with all items.
1.5 Performance Requirements (QC/QA).
1.5.1 The work will be accepted under Performance Requirements (QC/QA) provisions in accordance with these Specifications
and the applicable requirements of Section 106.
(a) The QC/QA Tier 1 item is to be used on specified projects that are on new locations, interstate projects, full depth
reconstruction projects in rural areas or on reclamation projects in rural areas.
(b) The QC/QA Tier 2 item is to be used on specified projects that are inlay type projects, full depth reconstruction projects
with maintenance of traffic phasing, projects with intersecting streets, projects with pavement tapers, bridge projects
with short approach paving, projects where there are many manhole/drainage structures or driveways (generally in urban
and suburban areas).
QUALITY/PAY FACTORS TO BE ASSESSED
Tier 1 Tier 2
Asphalt Content and Gradation ee
Ride Quality
/ Thickness x
Materials
2.1 Aggregates ~ General.
2.1.1 Aggregates shail be uniform quality durable pebbles or fragments of rock, with or without sand or other inert finely
divided mineral aggregate. All material shall be free from clay balls, organic matter, deleterious substances, and an excess of
flat or elongated pieces as specified in ASTM D 4791. Washing will not be required, except when aggregate plants do not
produce clean material by the dry process method. In order to obtain uniformity of color and appearance of the pavement
throughout the project, the aggregate for all the wearing courses shall be obtained from the same material source. Sufficient
material shall be on hand prior to starting daily operations to ensure uninterrupted processing for the working day.
2.1.2 Fine aggregate shall consist of sound durable particles of sand, crushed stone, or a combination thereof. Fine
aggregate shall be free from clay balls and injurious amounts of organic matter. Stone screening shall be produced from stone
at least equal in quality to that specified for coarse aggregate.
2.1.2.1 Fine aggregate may be 100 percent manufactured aggregate.
2.1.3 Mineral filler shall conform to AASHTO M 17 except that 100 percent shall pass the No 16 sieve, waiving the
requirement for the No. 30 sieve.
2.1.4 Coarse aggregate shall be crushed stone or crushed gravel and shall have a percentage of wear as determined by
AASHTO T 96 of not more than 45 percent unless otherwise specitied by Contract item. In each stockpile, not less than 50
percent by weight of the particles retained on the No. 4 sieve shall have at least one fractured face. Stockpiles consisting of a
blend of crushed stone and crushed gravel will be permitted so long as the overall consistency of the stockpile is reasonably
maintained and the lesser portion of coarse aggregate material does not exceed 10 percent of the total. This percentage shall be
determined on the portion of the total sample by weight that is retained on the No. 4 laboratory sieve.
2.1.4.1 Coarse aggregate for High Strength HBP shall be crushed stone and shal] have a percentage of wear as determined
by AASHTO 96 of not more than 45 percent wear.
2.2 Bituminous Materials — General.
2.2.1 Bituminous materials used for asphalt cement binder shall meet the properties specified in AASHTO M 320. The
grade of asphalt cement binder to be used will be specified in a Special Provision contained in the Proposal. Asphalt cement
shall not be air blown or contain any form of used, recycled or re-refined oil.
2016 NHDOT
GoTo=9) TOC Division 100 Division 200 Division 3UG Division 400 Standard
Division 300 = Division 600 Division 700 Specifications
