Summary of Rubber Modified Asphalt Product Specifications around ...

1151.05.06.04 Rubberized Asphalt Cement
CR added to the RAC shall meet the gradation requirements specified in Table R3 determined according to
ASTM D5644. Wet-terminal blend RAC shall be produced as a Type III Asphalt Rubber Binder according to
ASTM D6114. CR dosage by mass of wet-terminal blend RAC shall be 10% to 15%. Wet-field blend RAC (after
reaction) shall meet the requirements found in Table R4. CR dosage by mass of wet-field blend RAC shall be
18% to 20%. For the production of the RAC, parameters such as CR gradation, mixing method and equipment,
dosage, reaction time, mixing temperature, storage conditions and need for agitation, blending location (project
site vs. asphalt supplier’s terminal) shall be determined by the Contractor.
When the RAC supplier specifies a CR gradation with additional restrictions, the CR shall also meet the RAC
supplier’s gradation requirements. The CR material, PGAC and any antistripping additives required shall be
compatible to ensure a good dissolution and reaction time. RAC produced shall be a homogenous mixture of CR
and asphalt cement.
In case of terminal blend, the following asphalt cement suppliers have indicated their ability to supply the RAC:
a) Bitumar; b) Coco; c) McAsphalt; d) Shell
1151.07 PRODUCTION
1151.07.01 Anti-Stripping Additives
Subsection 1151.07.01 of OPSS 1151 is amended by addition of the following:
When an anti-stripping agent is to be incorporated into the mix, the Contractor shall contact and consult with
each supplier to determine whether or not the proposed anti-stripping agent is compatible with the RMA or RAC
or both. In those cases where a supplier deems that the anti-stripping agent is incompatible, that anti-stripping
agent shall not be used and the Contractor shall select and employ another anti-stripping agent that the suppliers
indicate is compatible with the mix and RAC.
1151.07.03 Field Blending Plant
The Contractor shall contact OTS a minimum of 6 weeks prior to paving Superpave 12.5FC 1 R-Gap Graded to
coordinate delivery and operation of the field blending plant. OTS contact information is provided earlier in this
special provision.
313.07 CONSTRUCTION
313.07.06.01 Operational Constraints
Clause 313.07.06.01 of OPSS 313 is amended by addition of the following:
The Contractor shall provide a minimum of 7 Days notice in writing to the Contract Administrator and to the
Ministry’s Regional Head of Quality Assurance Section before paving any trial section.
313.07.06.02 Paving
Clause 313.07.06.02 of OPSS 313 is amended by addition of the following:
The Contractor shall construct the trial section as indicated in Table R1, full width including shoulders.
Transition areas shall be less than 50 m in length at the start and end of the trial section. The Contractor shall
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