Asphalt-rubber is described by using the American Society for Testing and Materials (ASTM) Standard D6114 as “a combo of paving grade asphalt cement, floor recycled tire (that is, vulcanized) rubber and different additives, as needed, for use as binder in pavement construction. The rubber shall be blended and interacted in the warm asphalt cement sufficiently to reason swelling of the rubber particles prior to use.” The asphalt-rubber binder is subject blended (at the warm combine plant) and requires specialised cell mixing tools to produce. Typical crumb rubber modifier (CRM) content material for asphalt-rubber stages from 18-22 percent. The crumb rubber modifier used in asphalt-rubber is in the 10-16 mesh range.

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Terminal blends are binder substances that use finely floor (30 mesh or smaller) crumb rubber as an asphalt cement/binder modifier and are normally blended at the asphalt refinery. Terminal blended binders contained much less than 20 percentage crumb rubber modifier (typically in the 10-12% range) and have been used effectively in Florida for greater than 30 years and California for greater than 20.