Low Temperature Preparation of Rubber-Modified Asphalt Cement

摘要

This invention encompasses systems, methods, and apparatuses for low temperature preparation of rubber modified asphalt cement as well as resulting compositions.

主权项

1. A method for preparing a rubber-modified asphalt cement composition, comprising:
i) contacting asphalt with rubber granules to form a mixture; ii) heating the mixture to a temperature in the range of 450° F. to 510° F. to form a heated mixture; iii) mixing at least a portion of the heated mixture with rubber granules in a pre-wet vessel comprising a mixer to form a heated wetted asphalt/rubber mixture; and iv) passing the heated wetted asphalt/rubber mixture through at least one high shear mixer, wherein the rubber-modified asphalt cement composition has an integration value of at least 90.