详情

原文传递 Optimizing Gradations for Surface Treatments.

题名：	Optimizing Gradations for Surface Treatments.
作者：	kim, y. r. lee, j.
关键词：	asphalt surface treatments,retention performance,skid performance,aggregate gradation,asphalt surface treatments (asts),third-scale model mobile loading simulator (mmls3)/performance test, test protocol/
摘要：	This report presents the research effort to evaluate the aggregate retention and skid performance of various asphalt surface treatments (ASTs). The study includes two types of aggregate for the aggregate retention test and 14 field AST sections for the skid resistance tests. A new test protocol for the performance evaluation of ASTs was developed using the third-scale Model Mobile Loading Simulator (MMLS3). The AST performance characteristics that can be covered by this protocol include aggregate retention, bleeding, skid resistance, aggregate embedment depth, cracking, and rutting. In this study, the new MMLS3 AST performance test method was applied to evaluate the effects of various mix parameters on aggregate retention and bleeding; these parameters include aggregate and emulsion application rates, fine content, aggregate gradation, and aggregate type (i.e., granite vs. light-weight). It was confirmed that the amount of aggregate loss decreases as the aggregate application rate decreases, the emulsion application rate increases, the fine content decreases, and the gradation becomes more uniform. The aggregate gradation factor, among the others , plays a critical role in the aggregate retention performance regardless of the type of aggregate. The skid resistance test results from the test sections show an adequate skid resistance performance for these sections. The correlation between British Pendulum Numbers and Skid Numbers is found relatively strong, which allows the prediction of the Skid Number from the laboratory British Pendulum. / NOTE: Final rept. (July 2003 - June 2005). / Supplementary Notes: Sponsored by North Carolina Dept. of Transportation, Raleigh. and Federal Highway Administration, Raleigh, NC. North Carolina Div. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
报告类型：	科技报告