Guidelines to Improve Crumb Rubber Modified Asphalt Concrete Pavements

Project Description

In this study researchers sought to optimize the performance of crumb rubber modified (CRM) asphalt-concrete pavements through the development of materials and construction specifications, mixture design and testing procedures, binder testing procedures, and quality control and construction guidelines. CRM binders were fabricated in the laboratory and evaluated according to 10 different binder tests. Nine different CRM mixtures were evaluated using several different mixture characterization tests. They determined that CRM has the potential to significantly improve the fatigue and thermal cracking performance of asphalt concrete pavements. They also concluded that tire rubber, as an additive, should be used whenever possible to address a given mixture deficiency or expected deficiency in a given situation.

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