Methods and compositions to increase performance of asphalt cement concrete comprising recycled asphalt pavement
AssigneeSurface Tech LLC
InventorsJoseph A. Dennis, Steven Santa Cruz, Phillip B. Blankenship
Life of this patent
Estimating the term…
Abstract
The Present disclosure is related to hot-mix asphalt (“HMA”) for asphalt cement concrete (“ACC”) pavement. Equivalent-performing pavement may be made at lower cost, or higher-performing pavement may be made at equivalent-to-prior-art cost. The amendments, recycled asphalt pavement (“RAP”, and including recycled asphalt shingles [“RAS”]), and reinforcing fiber (aramid fiber) may be adjusted as described herein to achieve a desired price/performance target.
Claims20
A method of producing hot-mix asphalt (“HMA”) to form asphalt cement concrete (“ACC”) pavement, comprising:
- adding recycled asphalt pavement (“RAP”) and reinforcing fiber to an aggregate to form a combined aggregate;
- and
- adding asphalt binder and a liquid binder modifier to the combined aggregate, to form a mixture,
- wherein the liquid binder modifier lowers an asphalt binder low temperature grade of the combined aggregate by at least one grade.
A hot-mix asphalt (“HMA”) paving material comprising:
- an aggregate including:
- recycled asphalt pavement (“RAP”) including oxidized bitumen;
- asphalt binder;
- reinforcing fibers;
- and
- a liquid binder modifier that lowers the asphalt binder low temperature grade of the aggregate by at least one grade.
Dependencies are inferred from the claim text.