文献类型：期刊文献

英文题名：Study on Dynamic Modulus and Damping Characteristics of Modified Expanded Polystyrene Lightweight Soil under Cyclic Load

作者：Tao, Huaqiang[1,2];Zheng, Wenqian[1,2];Zhou, Xuhui[1,2];Zhou, Lin[1,2];Li, Cuihong[1,2];Yu, Yanfei[1,2];Jiang, Ping[1,2]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Shaoxing Key Lab Interact Soft Soil Fdn & Bldg Str, Shaoxing 312000, Peoples R China

年份：2023

卷号：15

期号：8

外文期刊名：POLYMERS

收录：SCI-EXPANDED(收录号：WOS:000977021100001)、、EI(收录号：20231814028594)、Scopus(收录号：2-s2.0-85153686042)、WOS

基金：This research was funded by National Natural Science Foundation of China (Grant number 41772311) and Zhejiang Province Natural Science Foundation of China (Grant number: LQ20E080005).

语种：英文

外文关键词：geosynthetics; EPS lightweight soil; dynamic elastic modulus; damping ratio; series-parallel model

外文摘要：In recent years, expanded polystyrene (EPS) lightweight soil has been widely used as subgrade in soft soil areas because of its light weight and environmental protection. This study aimed to investigate the dynamic characteristics of sodium silicate modified lime and fly ash treated EPS lightweight soil (SLS) under cyclic loading. The effects of EPS particles on the dynamic elastic modulus (E-d) and damping ratio (lambda) of SLS were determined through dynamic triaxial tests at various confining pressures (sigma(3)), amplitudes, and cycle times. Mathematical models of the E-d of the SLS, cycle times, and sigma(3) were established. The results revealed that the EPS particle content played a decisive role in the E-d and lambda of the SLS. The E-d of the SLS decreased with an increase in the EPS particle content (EC). The E-d decreased by 60% in the 1-1.5% range of the EC. The existing forms of lime fly ash soil and EPS particles in the SLS changed from parallel to series. With an increase in sigma(3) and amplitude, the E-d of the SLS gradually decreased, the lambda generally decreased, and the lambda variation range was within 0.5%. With an increase in the number of cycles, the E-d of the SLS decreased. The E-d value and the number of cycles satisfied the power function relationship. Additionally, it can be found from the test results that 0.5% to 1% was the best EPS content for SLS in this work. In addition, the dynamic elastic modulus prediction model established in this study can better describe the varying trend of the dynamic elastic modulus of SLS under different sigma(3) values and load cycles, thereby providing a theoretical reference for the application of SLS in practical road engineering.