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原文传递 EVALUATION AND CHARACTERIZATION OF A RUBBER-MODIFIED HOT MIX ASPHALT PAVEMENT.

题名：	EVALUATION AND CHARACTERIZATION OF A RUBBER-MODIFIED HOT MIX ASPHALT PAVEMENT.
作者：	Hanson-DI; Foo-KY; Brown-ER; Denson-R
关键词：	ASPHALT-RUBBER; HOT-MIX-ASPHALT; CRUMB-RUBBER; TEST-SECTIONS; WET-PROCESS; PARTICLE-SIZES; LABORATORY-TESTS; FIELD-PERFORMANCE; DEFORMATION-; TENSILE-STRENGTH; MODULUS-OF-RESILIENCE; GYRATORY-TESTS; AIR-VOIDS-CONTENT; BULK-DENSITY; WATER-SUSCEPTIBILITY; CREEP-; RUTTING-; SURFACE-CRACKS; VISUAL-INSPECTION
摘要：	The Intermodal Surface Transportation Efficiency Act of 1991 placed a minimum utilization requirement for recycled rubber in hot mix asphalt (HMA) on the state departments of transportation (DOTs). Each state DOT is required to use a minimum percentage of recycled rubber each year starting in FY 1994. As state DOTs gear toward incorporating recycled rubber materials, there is a need to evaluate the effect of the recycled rubber materials on the performance of asphalt pavement. In 1991 Mississippi placed a conventional HMA (control) along with a rubber-modified HMA (RMHMA) test section. Crumb rubber was incorporated into the pavement using a recent wet process technology known as the continuous process developed by Rouse Rubber Industries. This process blends the fine powdered crumb rubber, which passes a 236-micrometer (No. 80 sieve) screen and has a 75-micrometer (No. 200 sieve) mean particle size, with asphalt cement. The laboratory properties of the control HMA and the RMHMA were evaluated at various times for the first 2 years of the pavement's life. At the same time, the in-place performance of the two sections was also observed. The control HMA and RMHMA were subjected to a testing program that included tests to evaluate permanent deformation, indirect tensile strength, resilient modulus, gyratory properties, voids in total mix, and bulk densities. Laboratory test results indicated that the RMHMA mix has lower water susceptibility and higher tensile strength and resilient modulus. The gyratory properties and creep/permanent deformation tests indicate that the RMHMA mix should be more resistant to rutting. In-place performance was evaluated by visual observation of surface cracking and rut measurement for the first 2 years of the pavement's life. There was no cracking in either the control or the RMHMA test section. The amount of rutting was insignificant and was likely caused by densification of the mixes.
总页数：	Transportation Research Record. 1994. (1436) pp98-107 (1 Fig., 9 Tab., 17 Ref.)
报告类型：	科技报告