Study on Pressure⁃Sensitive Properties of Carbon Fiber Powder Reinforced Lime⁃Improved Silty Sand  

作　　者：Lixia Wang Zilin Hu Qing Wang Yunlong Zhang 

机构地区：[1]School of Transportation Science and Engineering,Jilin Jianzhu University,Changchun 130119,China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2025年第2期14-23,共10页哈尔滨工业大学学报(英文版)

基　　金：Sponsored by Jilin Provincial Department of Education Scientific Research Project(Grant Nos.JJKH20190875KJ,JJKH20230348KJ).

摘　　要：This study tested the electrical conductivity and pressure sensitivity of lime⁃improved silty sand reinforced with Carbon Fiber Powder(CFP)as the conductive medium.The influence of CFP dosage,moisture content and curing duration on the unconfined compressive strength,initial resistivity and pressure sensitivity of the improved soil was systematically analysed.The results showed that the unconfined compressive strength varied non⁃monotonically with increasing CFP dosage,reaching a peak at a dosage of 1.6%.Furthermore,the initial resistivity showed slight variations under different moisture conditions but eventually converged towards the conductive percolation threshold at a dosage of 2.4%.It is worth noting that CFP reinforced lime⁃improved silty sand(CRLS)exhibit a clear dynamic synchronization of strain with stress and resistivity rate of variation.The pressure sensitivity was optimized with CFP dosages ranging from 1.6%to 2.0%.Both insufficient and excessive dosages had a negative impact on pressure sensitivity.It is important to consider the weakening effect of high moisture content on the pressure sensitivity of the specimens in practical applications.

关 键 词：lime⁃improved silty sand CFP unconfined compressive strength RESISTIVITY pressure⁃sensitivity 

分 类 号：TU521[建筑科学—建筑技术科学]