The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1998
Filed:
Mar. 25, 1996
Larry A Lukens, Highlands Ranch, CO (US);
The New Paraho Corporation, Boulder, CO (US);
Abstract
A composition for rejuvenating asphalt comprises between 5-25% by weight shale oil modifier and between 75-95% by weight asphalt cement. The asphalt cement may consist of an AC-10 binder or an AC-20 binder. The shale oil modifier is made of dehydrogenated crude shale oil, the shale oil modifier exhibiting non-Newtonian properties when mixed with asphalt cements. A recycled asphalt pavement consists of the above-described rejuvenating composition and an aggregate composition comprising between about 30-40% recycled asphalt pavement and between about 60-70% virgin aggregate. A method for rejuvenating asphalt pavement includes milling and collecting a select thickness of asphalt pavement of a portion of an existing roadbed. A shale oil modified asphalt comprising between about 5-25% shale oil modifier and 75-95% asphalt cement is provided. An aggregate comprising about 60-70% virgin aggregate and about 30-40% of the milled and collected asphalt is combined with the shale oil modified asphalt and then applied to the portion of the existing roadbed.