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原文传递 Evaluation of Aggregate Base Course for the FHWA's New Pooled-Fund Accelerated Testing Pavements

题名：	Evaluation of Aggregate Base Course for the FHWA's New Pooled-Fund Accelerated Testing Pavements
正文语种：	中文
作者：	Qi Xicheng Terry Mitchell Tom Harman
作者单位：	Tumer-Faiibank Highway Research enter,6300 Georgetown Pike,McLean,V 2101,US FHW ,6300 Georgetown Pike,TFHR ,HR I-11,McLean,V 2101,US Materials and onstruction Team Leader,FHW ,6300 Georgetown Pike,TFHR ,McLean,V 2101,US
关键词：	高速公路沥青路面路基工程路面检验
摘要：	In an ongoing transportation pooled fund study on refining Superpave binder specifi cations, 12 full-scale pavement lanes with various modified asphalts were constructed at the Federal Highway Administration's (FHWA) Pavement Test Facility (PTF) in Virginia. The hot mix asphalt (HMA) layers were built on an aggregate base course used in a previous exper iment and partially replaced and re-compacted during the reconstruction. The goal during the reconstruction was to achieve a uniform base course across the 12 lanes by controlling the com paction density. Three in situ tests were conducted on the top of the base course during the construction. They were Nuclear Density (ND) gauge, Humboldt Stiffness Geogauge?(HSG), and falling weight deflectometer (FWD). This paper summarizes the results and evaluations from these in situ measurements.The results show the dry density values measured by the Nuclear Density gauge were not statistically different across the 12 lanes, but the FWD showed significant variations in composite modulus across the same lanes. Analyses were conducted on the effect of variations in the base composite modulus on fatigue cracking and rutting in the pavements. The analyses indi cate that the variations in the base composite modulus could result in significant differences in pavement fatigue life but the pavement rutting distress was not very sensitive to the base layer variations over the range encountered.
会议日期：	20050625
会议举办地点：	西安
会议名称：	第五届交通运输领域国际学术会议
出版日期：	2005-06-25
母体文献：	第五届交通运输领域国际学术会议论文集
分类号：	U416.217 U416.06