文献类型：期刊文献

英文题名：The Time Effect and Micromechanism of the Unconfined Compressive Strength of Cement Modified Slurries

作者：Jiang, Ping[1,2];Chen, Yewen[1];Zhou, Lin[1];Mao, Tianhao[1];Wang, Wei[1];Yuan, Junping[2];Li, Na[1]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Hohai Univ, Minist Educ Geomech & Embankment Engn, Key Lab, Nanjing 210098, Peoples R China

年份：2021

卷号：2021

外文期刊名：ADVANCES IN MATERIALS SCIENCE AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000665016300003)、、EI(收录号：20211910336562)、Scopus(收录号：2-s2.0-85105403125)、WOS

基金：This research was funded by the National Natural Science Foundation of China (Grant number 41772311), the Zhejiang Provincial Natural Science Foundation of China (Grant number Q20E080042), the Open Research Fund of Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering of Hohai University (Grant number 2019020), and the Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science (Grant number Z017013).

语种：英文

外文关键词：Cements - Chemical analysis - Curing - Scanning electron microscopy

外文摘要：This study investigated the unconfined compressive strength change law of cement modified slurries (CMS) under different curing ages. We conducted unconfined compressive strength tests using slurry and cement as raw materials. The cement contents were 5%, 10%, 15%, 20%, and 25%. The curing ages were 7, 14, 28, 56, 90, 120, 150, and 180 d. A time effect model of CMS strength was established based on the measured UCS strength-curing age and the strength-cement content curves. The test results proved that the UCS of the CMS increased significantly with an increase in the curing age, and after 90 days, the UCS gradually increased to a fixed value. The time effect model better characterized the relationship between the UCS of the CMS and the curing age and the cement content, as the predicted value had a high correlation with the measured value. We conducted scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and X-ray diffraction (XRD) tests to analyze the microstructure and chemical composition of the CMS. The microscopic test results demonstrated that the increase of cement content and curing age increased the amount of gelling substances in the CMS and made the overall structure more compact, thereby increasing its macro strength.