详情

原文传递 Evaluation of the Specification for Flat and Elongated Particles for Use in Hot Mix Asphalt in Connecticut.

题名：	Evaluation of the Specification for Flat and Elongated Particles for Use in Hot Mix Asphalt in Connecticut.
作者：	Clement, S.; Fallon, J. A.; Mahoney, J.; Morison, K.; Zinke, S.
关键词：	Aggregate Requirements; Asphalt Pavements; Connecticut; Connecticut Department Of Transportation(conndot); Damage Assessment; Hot Mix Paving Mixtures; Infrared Detection; Pavement Damage; Separation;
摘要：	This research was conducted to determine if the specification for flat and elongated aggregates for use in Hot-Mix Asphalt (HMA) in Connecticut can be reasonably achieved. Currently, the ConnDOT specification allows for no more than 10 percent flat and elongated particles utilizing a 3:1 ratio. It has been speculated that this specification may not be achievable by most HMA producers in Connecticut. The research team evaluated specifications from numerous regional state agencies for comparison with the ConnDOT specification. The research team also sampled aggregates from 15 sources which produce HMA for ConnDOT. 3/8-inch and 1/2-inch aggregates were sampled from each source, and flat and elongated tests were conducted on both size aggregates from all 15 sources. This totaled 30 aggregate samples tested from which only six passed the 10 percent maximum at the 3:1 ratio. Recommendations are made to change the specification to reflect achievable percentages of aggregates which are not flat and elongated. It is the opinion of the research team that this percentage should be not more than 10 percent flat and elongated particles by weight utilizing a 5:1 caliper ratio, ASTM D4791, Method B.
报告类型：	科技报告