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原文传递 Analysis of South Texas Aggregates for Use in Hot Mix Asphalt.

题名：	Analysis of South Texas Aggregates for Use in Hot Mix Asphalt.
作者：	BHASIN, A.; BUTTON, J. W.; CHOWDHURY, A.; MASAD, E.
关键词：	AGGREGATES; ASPHALT PAVEMENTS; FLEXIBLE PAVEMENTS
摘要：	The primary locally available aggregates in the South Texas districts for highway construction are siliceous river gravels, which typically exhibit a rounded shape. The warm South Texas climate combined with heavy truck traffic aggravates any rutting problems that may occur due to the use of low angularity aggregates in hot mix asphalt (HMA) paving mixtures. The objective of this study was to determine the effect of aggregate angularity and nominal maximum size of siliceous aggregates on performance of selected HMA surface pavement mixtures. The research approach was guided by the realization that engineers can use the results for mixture design, especially for South Texas districts. Aggregates and mixture designs were obtained from the Corpus Christi, Laredo, and Pharr Districts. The selected aggregates were characterized using image analysis, crushed face count, flat and elongated particles, and Micro-Deval tests. Researchers assessed performance of the HMA based on the simple performance tests and the Hamburg test. Comparison of aggregate properties with mixture performance yielded important information about optimal design of mixtures containing siliceous gravels.
报告类型：	科技报告