Performance grade asphalt and methods
AssigneeTexaco Inc.
InventorsBruce R. Bond, Foster L. Wade
Life of this patent
Estimating the term…
Abstract
The present invention relates to Performance Grade asphalt and a method for producing the same. The process includes adding a performance grade modifier and aggregates to an asphalt cement. The performance grade modifier reduces the high temperature limit and the low temperature limit of the performance grade asphalt in a ratio of about 1:1. A vacuum distilled component of recycled used lubricating oil is used as the performance grade modifier. The recycled used lubricating oil is added to the base oil and aggregate in sufficient quantities to achieve the selected operating temperature range.
Claims27
A process for making performance grade asphalt, comprising:
- blending a performance grade modifier and aggregates with an asphalt cement, wherein the performance grade modifier is a vacuum distilled component of recycled used lubricating oil, and the performance grade modifier modifies a high temperature limit and a low temperature limit of the performance grade asphalt;
- and
- selecting a desired operating temperature range, wherein the performance grade modifier is added to the blend in quantities sufficient to achieve said selected operating temperature range.
Performance Grade asphalt comprising:
- an asphalt cement;
- aggregates;
- and
- recycled used lubricating oil that is substantially free of metals.
A process for making performance grade asphalt, comprising:
- blending a performance grade modifier and aggregates with an asphalt cement, wherein the performance grade modifier is a vacuum distilled component of recycled used lubricating oil that is substantially free of metals.
A Performance Grade asphalt prepared by the process comprising:
- adding a performance grade modifier and aggregates to an asphalt cement, wherein the performance grade modifier is a vacuum distilled component of recycled used lubricating oil that is substantially free of metals.
Dependencies are inferred from the claim text.