The United States of America as Represented by the Secretary of

The United States of America as Represented by the Secretary of Transportation

Brian H Chollar

Mohamed Emam Labib

G Mohammed Memon

Ghulam Mohammed Memon

A compatibilizer and process for use in making crumb rubber modified asphalt. The compatibilizer causes the crumb rubber to completely interact with the asphalt, thereby improving the rheological properties of the asphalt and reducing the tendency of pavement made with the asphalt to ravel. The compatibilizer has as its reactive component one or more glycidyl groups; its polymeric backbone can be ethylenic, styrenic, or acrylic or ethylene vinyl acetate (EVA).

Compatibilizer for crumb rubber modified asphalt

Increasing the usable temperature range of asphalts that contain crumb rubber particles by treating the crumb rubber with hydrogen peroxide in the presence of a catalyst such as Fenton's reagent, dioxomolybdenum bis(acetylacetonate), cobalt salt, tall oil, p-toluene sulfonic acid (PTSA), and others.

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Falls Church, VA, United States of America

Brian H Chollar