Crumb rubber modified asphalt with improved settling properties
AssigneeThe United States of America as represented by the Secretary of Transportation
InventorG. Mohammed Memon
Life of this patent
Estimating the term…
Abstract
An improved asphalt having enhanced settling properties. The asphalt includes crumb rubber particles which have been treated to produce a greater number of carboxylic sites on the surface of the crumb rubber. These carboxylic sites interact with the functional groups in the asphalt, resulting in a homogeneous mixture having improved separation characteristics as well as the improved rheological properties due to the inclusion of the crumb rubber particles.
Claims10
An improved asphalt comprising asphalt and crumb rubber particles, said crumb rubber particles having been treated to produce enhanced carboxylic sites on their surfaces before being added to the asphalt.
An improved asphalt comprising a polymer modified asphalt and crumb rubber particles, said crumb rubber particles having been treated to produce enhanced carboxylic sites on their surfaces before being added to the asphalt.
Dependencies are inferred from the claim text.