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原文传递 VIRGINIA'S EXPERIENCE WITH A 9.5-MM NOMINAL-MAXIMUM-AGGREGATE-SIZE STONE MATRIX ASPHALT.

题名：	VIRGINIA'S EXPERIENCE WITH A 9.5-MM NOMINAL-MAXIMUM-AGGREGATE-SIZE STONE MATRIX ASPHALT.
作者：	Prowell-BD; Cooley-LA Jr.; Schreck-RJ
关键词：	Aggregate-gradation; Compaction-; Field-data; Nominal-maximum-aggregate-size; Permeability-; Road-construction; Rutting-; Sieves-; Size-; Stone-matrix-asphalt; Virginia-
摘要：	Construction data from two Virginia stone matrix asphalt (SMA) field projects that used 9.5-mm nominal-maximum-aggregate-size (NMAS; Superpave definition) gradations are presented. Analyses were conducted to evaluate breakpoint sieve size, rut resistance, design compaction effort, and permeability. Rut resistance and permeability results for 9.5-mm NMAS mixes were compared with those for more conventional Virginia 19.0- and 25.0-mm NMAS SMA mixes produced by the same contractor and with the same aggregate source. A sieve size of 2.36 mm was confirmed as being the appropriate breakpoint for 9.5-mm NMAS SMA. For this gradation, 9.5-mm NMAS SMA with both performance-graded binder (PG) 70-22 and PG 76-22 was as rut resistant as previous Virginia SMA mixtures, as tested with the Asphalt Pavement Analyzer. The data for these sections indicate that 9.5-mm NMAS SMA should be designed with 75 gyrations instead of the currently recommended 100 gyrations. SMA with a 9.5-mm NMAS was also shown to be less permeable at the same air void level as the more commonly used 19.0- and 25.0-mm NMAS SMA.
总页数：	Transportation Research Record. 2002. (1813) pp133-141 (8 Fig., 1 Tab., 15 Ref.)
报告类型：	科技报告