Experimental-mechanistic analysis of pavement base deflections measured with light weight deflectometer  

作　　者：Yao Yao Shuo Li Guangyuan Zhao Yi Jiang 

机构地区：[1]Shanghai Urban Construction Design and Research Institute(Group)Co.Ltd.,Shanghai 200000,China [2]Indiana Department of Transportation,West Lafayette,IN 47906,USA [3]Department of Civil and Environmental Engineering,University of Waterloo,Waterloo,ON N2L 3G1,Canada [4]School of Construction Management Technology,Purdue University,West Lafayette,IN 47907,USA

出　　处：《Journal of Traffic and Transportation Engineering(English Edition)》2023年第2期320-330,共11页交通运输工程学报（英文版）

基　　金：supported in part by the Joint Transportation Research Program administered by the Indiana Department of Transportation and Purdue University。

摘　　要：An extensive experimental-mechanistic study was conducted to reveal the relationship between the light weight deflectometer(LWD)measured deflections and the degree of compaction of pavement base materials.Both laboratory experiments and test pits experiments were performed with different types of pavement base materials.The modulus based maximum allowable LWD deflections under different structural and compaction conditions were developed for the most commonly used pavement base aggregate in Indiana.The maximum allowable deflections are based on the equivalent subgrade modulus and the thickness of the layer to be compacted.It is emphasized that the LWD deflections must be measured as soon as the material is compacted or before the moisture content decreases beyond a specified range.Therefore,the maximum allowable deflections are specified in terms of the difference between the actual moisture content and the optimum moisture content.The maximum allowable deflection values provide a sound basis for compaction quality control using LWD devices.

关 键 词：PAVEMENT Light weight deflectometer COMPACTION DEFLECTION Moisture content MODULUS 

分 类 号：U416.2[交通运输工程—道路与铁道工程]