Summary of Rubber Modified Asphalt Product Specifications around ...

The Superpave 9.5 R-Gap Graded mix design and JMF shall be according to the requirements specified in Table
R2, Table 3 of OPSS 1151, and LS-309. For mix design purposes, the RAC shall be produced in the laboratory
according to the following procedure:
Heat up the base PGAC to 180 o C. Add 18-20% CR by weight of the PGAC while continuously blending the
compound.
Continue blending the RAC for 45 minutes at 180 o C.
1151.04.02 Submission Requirements
Subsection 1151.04.02 of OPSS 1151 is amended by the addition of the following:
The Contractor shall submit a plan and schedule to the Contract Administrator within two weeks of contract
award describing how the Contractor will meet all the requirements of this non-standard special provision for
review and approval including the following information in writing:
a) Special actions to be taken to assure that the CR will be available meeting the requirements of the Contract
Documents, including that the CR processor selected by the Contractor or asphalt cement supplier or both
can provide the material required for the Contract, and how the Contractor will assure that the CR processor
selected has sufficient time to produce the quantity of CR required.
b) Information such as CR supplier’s name, address, CR gradation, materials safety data sheet (MSDS), method
and equipment used to mix CR into mix, CR dosage, RAC reaction time, mixing temperature, RAC storage
conditions and any need for agitation, RAC blending location (hot mix asphalt plant vs. asphalt supplier’s
terminal) shall be provided.
c) Special actions to be taken to prevent swelling of the briquettes during the mix design.
d) Special actions to be taken to assure that the CR will be homogeneously distributed in the RMA.
e) Special actions to be taken to prevent pick-up during compaction of the RMA.
f) Product information on CR including information on how it was ground, whether cryogenic or ambient or
both, shall be submitted with the mix design.
g) A letter from the CR supplier indicating that the CR they are supplying is produced in Ontario from tires
scrapped in Ontario.
No RMA shall be placed on any trial section until the Contract Administrator acknowledges receipt of the plan
and schedule in writing. Separate mix designs shall be submitted for each RMA type and for the control mix.
1151.05 MATERIALS
Section 1151.05 of OPSS 1151 is amended by addition of the following:
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