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U.S. Department of Energy
Office of Scientific and Technical Information

Development of a crumb rubber modified (CRM) asphalt concrete mix design. Final report, June 1993-May 1995

Technical Report ·
OSTI ID:161973
The objective of this project was to develop an asphalt mix design method incorporating crumb rubber and using the `Wet` or `Dry` method of producing Crumb Rubber Modified Asphalt (CRM). Several resurfacing projects have been constructed using both the `Wet` and `Dry` methods. Based on this study, KDOT could use CRM mixes with a binder content between 7.5% and 9.0% depending on the percent air voids, with 19% to 22% rubber content. In this study, it was observed that using 24% rubber produced mixed were too sticky to manage. With a rubber content of less than 18% combined with AC-5 it was difficult to satisfy the minimum requirements. Fracture tests can be used as a basis to determine the optimum binder content for any asphalt-rubber mix.
Research Organization:
Kansas State Univ., Manhattan, KS (United States). Dept. of Civil Engineering
OSTI ID:
161973
Report Number(s):
PB--96-111331/XAB
Country of Publication:
United States
Language:
English