文献类型：期刊文献

英文题名：Mechanical and micro-structure characteristics of cement-treated expansive soil admixed with nano-MgO

作者：Wang, Wei[1];Lv, Beifeng[1];Zhang, Chen[2];Li, Na[1];Pu, Shaoyun[1]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Southeast Univ, Sch Transportat, Nanjing 211189, Jiangsu, Peoples R China

年份：2023

卷号：82

期号：2

外文期刊名：BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:000914787200002)、、EI(收录号：20230313407511)、Scopus(收录号：2-s2.0-85146325238)、WOS

基金：This research was funded by the National Natural Science Foundation of China (52179107) and China Scholarship Council (201607910002)

语种：英文

外文关键词：Nano-MgO; Cement-treated expansive soil; Statistical method; Unconfined compressive strength test; Micro-structure

外文摘要：Because of some limitations in engineering applications of cement-treated expansive soil, nano-MgO (NM) is used to improve its mechanical characteristics and micro-structure. NM-modified cement-treated expansive soil (NMCS) was analyzed by using unconfined compressive strength (UCS) tests, and NM contents were 0%, 0.5%, 1%, 1.5%, and 2%, respectively. Results of the test suggested that (1) a new statistical method was proposed to better correct the UCS test error of NMCS. (2) The stress-strain curve of NMCS was characterized by softening type. (3) The compressive strength, stiffness, and toughness of cement-treated soil were improved after adding NM, and the optimal NM content was 1%. (4) Microscopic tests showed that NM promoted the cement hydration reaction and filled the pores of soil samples, making the internal structure of cement-treated soil more compact. Accordingly, it is feasible to investigate the applicability of NMCS in engineering.