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Development of a Crumb Rubber Modified (CRM) Asphalt Concrete Mix Design

机译：粉碎橡胶改性（CRm）沥青混凝土配合比设计的研究进展

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The objective of this project was to develop an asphalt mix design methodincorporating 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.

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