SECTION 401
Amend Table 3 in AASHTO M 323, referenced in AASHTO R 335, to read as follows:
Table 401-1 —Design Control Points*
Standard Nominal Maximum Aggregate Size
—— a= — — ae | ern ae a ~ 3/4" See enn mepen ay /0 — "3/99 “oe 1 No. 4
Sieves i
cee ge pene enn Max | Min | Max. | Min. | Max | Min, 7 Max. | Min. | Min.
Inch Percentage by Weight Passing Criteria (Control Points)
Ja 90.0 100.07 90.0 FF 100.0)
en ns co 90.0 97.0 90.0
O | 42.0 | 32, 2.0 1 96.0 165.0
Sd, | oe
Le 26.0 |
IE a 20.0
; 80 | 20 | 100 | 20 | 100 | 20 1 80. 40
All mix designs shall be submitted to the Department for verification and approval.
* Superpave designs will be accepted through the restricted zone, pending verification and approval by the Bureau of
Materials & Research. The Contractor shall submit compaction data from trial blends at the optimum asphalt content and at
0.5% below and above the optimum asphalt content. The data shall include the temperature at which the HMA was aged.
2.5.1.1 All 25 mm base course mixes shall be designed using the 50 gyration Neesign-
2.5.2 The Design Information shall include:
(a) Asphalt Binder
(b) PG Test Data
{c) Specitic Gravity
{d) Laboratory Mix/Compaction Temperature
(e) Aggregate
(f) Dry and Washed Gradation
(g) Bulk and Apparent Specific Gravity
(h) All appropriate consensus properties
i) Blends
(j) Baghouse material from the plant shall be incorporated into the mix design. The amount of baghouse material
should be based on estimated usage or experience.
{k) Moisture susceptibility according to AASHTO T 283.
Along with the design information, Materials & Research (M&R) requires 2 quarts of the designated asphalt binder, 4
preblended aggregate specimens for gyratory and 2 preblended aggregaie specimens, suitable for AASHTO T-209 when mixed
with the appropriate asphalt, in order to verify the design. M&R will accept the mix design based on the submitted information
meeting the mix requirements and on verification of the mix volumetrics of the submitted specimen. If the verification samples
indicate voids between 3.0 and 5.5 percent, and the Voids in Mineral Aggregate (VMA) and Voids Filled with Asphalt (VFA)
fall within the specified limits, then the design will be accepted. Once accepted, the approved mix design is the job mix formula
(JMF). If the voids are outside the aforementioned range or the VMA or VFA are outside the specified limits, the design will be
rejected. M&R may elect to verify the design again.
2.5.3. The proposed mix designs and materials shall be submitted to the Engineer a minimum of 20 working days before
placement for approval. It shall be the responsibility of the Contractor to ensure all approved mix designs have been entered into
the plant automation system before production begins. The Contractor will also be required to post a copy of the JMF in the DOT
testing laboratory.
2016 NHDOT
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