Presentation Outline
•Asphalt-Rubber defined
•Specification Sources–AZ, CA, FL, TX and ASTM
•Crumb Rubber Gradations
•Binder Components and Properties
•Friction Course Aggregate Gradations
•Common Design Procedures

Asphalt-Rubber as defined by ASTM D8 and Specified in ASTM D 6114
“Asphalt-Rubber is a blend of asphalt cement, reclaimed tire rubber and certain additives, in which the rubber component is at least 15% by weight of the total blend and has reacted in the hot asphalt cement sufficiently to cause swelling of the rubber particles.”

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