Summary of Rubber Modified Asphalt Product Specifications around ...

The Contractor shall be solely responsible for obtaining materials, producing mixes, transportation,
storage and use of all materials. The Contractor shall assure that the modified mixes are produced to
the supplier’s recommendations to prevent any deleterious effects to the finished product.
The Contractor shall be responsible for the preparation of job mix formula for all hot asphalt mixes
defined in this special provision, which shall meet the requirements detailed in this special provision as
well as elsewhere in the contract. Surface and binder courses in each of the test sections shall be
constructed using the approved job-mix formula (JMF).
The Contractor is responsible for all quality control measures to be taken to assure that the products
meet the requirements of this special provision and the general requirements of this contract. The
contractor shall submit separate quality control plans for each of the mixes specified in this special
provision a minimum of two months prior to the start of paving. The Contractor shall submit a plan to
the Contract Administrator not later than two months prior to the construction of the test sections
describing what special actions will be taken to assure rubber will be homogeneously distributed in the
RAC-O.
If for any reason a supplier is no longer able to provide the mix or materials then the Contractor shall
make all reasonable effort to substitute the materials or mix with a similar product from a different
supplier. Any change will need to be approved in writing by the Contract Administrator before paving
of the test section starts.
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
RAC-O. In those cases where the RAC-O supplier deems the anti-stripping agent incompatible, it shall
not be used in that test section, and the Contractor shall select and employ another anti-stripping agent
that the supplier indicates is compatible with their mix. The Contractor shall provide a copy of the
correspondence from mix producer detailing the compatibility or incompatibility with the proposed
anti-stripping agent to the Contract Administrator prior to paving of that test section.
The Contractor shall be responsible for ensuring cross contamination does not occur between the test
sections.
Each regular and modified hot mix asphalt used for the test sections shall not contain any reclaimed
asphalt pavement (RAP). The regular and modified hot mixes shall meet all the mix property
requirements specified elsewhere in the Contract.
Additional Sampling of Materials
The Contractor shall deliver to the address listed below:
1. Four (4)-litre sample of the rubberized asphalt obtained from the sampling spigot at the hot mix
plant during the production of the RAC-O (applicable when the wet process is used);
2. Twenty (20) kg of CRM used in RAC-O (applicable when the semi-wet process is used);
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