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原文传递 Field Trials of Asphalt Rubber Hot Mix in Virginia; Final rept. 7 Sep 89-31 1994.12

题名：	Field Trials of Asphalt Rubber Hot Mix in Virginia; Final rept. 7 Sep 89-31 1994.12
作者：	Maupin, G. W.
关键词：	Field tests; Hot mix paving mixtures; Virginia; Waste utilization; Pavement friction; Highway construction; Highway maintenance; Road materials; Creep properties; Tires; Tensile strength; Pavement condition
摘要：	Four test sections using asphalt rubber hot mix were placed in Virginia during the period of 1990 through 1993. The purpose of these installations was to familiarize both contractors and the Virginia Department of Transportation (VDOT) personnel with the construction process and compare the performance of different types of mixes containing ground tire rubber. The MacDonald and Rouse processes, both wet processes, were used successfully. Dense-graded surface mixes, a gap-graded surface mix, and a base mix were manufactured. A stress absorbing membrane interlayer was also used on one project in an attempt to deter or eliminate a variety of types of cracking. The asphalt rubber mixes have performed as well as the conventional mixes over the short term. More evaluation time is needed to determine if the long-term performance of the asphalt rubber mixes is superior to that of the conventional mixes. The cost of the asphalt rubber mixes was 64 to 102 percent more than that of the conventional mixes; however, this cost would probably decrease if substantial quantities were placed. VDOT has the necessary experience to contract placement of asphalt rubber mixes if the suspended Intermodal Surface Transportation Efficiency Act (ISTEA) mandate is effected.
总页数：	42p
报告类型：	科技报告