文献类型：期刊文献

英文题名：Unconfined Compressive Properties of Fiber-Stabilized Coastal Cement Clay Subjected to Freeze-Thaw Cycles

作者：Li, Na[1,2];Zhu, Yalan[2];Zhang, Fang[2];Lim, Sin Mei[3];Wu, Wangyi[2];Wang, Wei[2]

机构：[1]Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China;[2]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[3]Natl Univ Singapore, Dept Civil & Environm Engn, Singapore 117576, Singapore

年份：2021

卷号：9

期号：2

起止页码：1

外文期刊名：JOURNAL OF MARINE SCIENCE AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000622642200001)、、Scopus(收录号：2-s2.0-85100521820)、WOS

基金：This research was funded by 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), and the Zhejiang Provincial Natural Science Foundation of China (grant number LY17E080016).

语种：英文

外文关键词：cemented clay; freeze-thaw cycle; polypropylene fiber; unconfined compressive strength; microscopic analysis

外文摘要：This study aimed to investigate the feasibility of using polypropylene fiber-cement-stabilized coastal clay as base-course material or foundation material for city sustainable development by assessing its mechanical performance. The influence of the number of freeze-thaw cycles and curing ages on the mechanical properties of ordinary cemented clay (OCC) and polypropylene fiber-cemented clay (PCC) was investigated by using unconfined compressive test. The experimental results show that the addition of fiber with 1% content can increase the strength as well as the ductility of cemented clay by 12.5% and 15.6%, respectively. The strength of PCC and OCC at 22d age was 1.5 times than at 7d age. Under differently timed freeze-thaw cycles, the mechanical performance of PCC is improved, and, better than that, OCC improves by 11.8% in strength, 16.5% in strain and by 5% in degree of damage, indicating that fiber can improve the freeze-thaw resistance of cemented clay. The frost resistance of PCC and OCC increases with the increase in curing age. Finally, the variation of strength of OCC was explained through the change of micro-structure while the strength enhancing mechanism of polypropylene fiber for cemented clay was also revealed.