Summary of Rubber Modified Asphalt Product Specifications around ...

Appendix C: Specification for Ontario Quiet Pavement Test Section RAC-O
Test Sections of quiet pavement
Scope
This special provision covers the requirements for the construction of five (5) test sections on portions
of Hamilton bound lanes of Highway 405 as follows:
One section using open friction course (OGFC) asphalt containing polymer/fibre modified
PGAC as surface course and HL4 Open Binder Course (OBC) as binder course over Superpave
19.0 binder course.
One section using open friction course (OGFC) asphalt containing polymer/fibre modified
PGAC as surface course and Superpave 19.0 as binder course.
One section using open friction course asphalt containing crumb rubber modified PGAC
obtained through wet process (RAC-O) as surface course and Superpave 19.0 as binder course.
One section using SMA 9.5 as surface course and Superpave 19.0 as binder course.
One section using Superpave 12.5 FC2 as surface course and Superpave 19.0 as binder course.
The purpose of the test sections is to examine the effect of various asphalt mixes on the tire-pavement
noise. This is a materials-related study requiring additional care, materials sampling, and documentation
as set out in this special provision. Materials and construction variability are to be carefully controlled
to minimize their influence on the performance of the test sections.
Definitions
Crumb Rubber Modifier (CRM): general term for scrap tire rubber that is reduced in size for use as
modifier in asphalt paving material.
Rubberized Asphalt (RA): means asphalt binder modified with CRM through wet process.
Open Graded Rubberized Asphalt Concrete (RAC-O): means hot mix asphalt obtained from mixing
rubberized asphalt (RA) with open graded aggregate.
Submission and Design Requirements
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 special provision
including asphalt modification methods and RAC-O process. The mix design information for all mixes
shall be provided to the Ministry. No asphalt concrete shall be placed on any test section until the
Contract Administrator issues written approval of the plan and schedule in writing.
Materials
Materials for the SMA, OGFC, RAC-O, OBC, and Superpave shall conform to OPSS 313, 1003, 1101,
or as specified elsewhere in the contract, except as amended hereafter by this special provision. If the
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