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Experimental Study on Chemical-Physical Hardening Mechanism of Early Strength of Filling Paste  ( EI收录)  

文献类型:期刊文献

英文题名:Experimental Study on Chemical-Physical Hardening Mechanism of Early Strength of Filling Paste

作者:Wang, Changxiang Hu, Hao Zhang, Meng Li, Huaibin Zhang, Gengshuo Xu, Mengtang

第一作者:Wang, Changxiang

通信作者:Hu, H[1]

机构:[1]Anhui Univ Sci & Technol, State Key Lab Min Response & Disaster Prevent & Co, Huainan 232001, Anhui, Peoples R China;[2]Sch Civil Engn, UQ, Brisbane, Qld 4072, Australia;[3]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Peoples R China

第一机构:Anhui Univ Sci & Technol, State Key Lab Min Response & Disaster Prevent & Co, Huainan 232001, Anhui, Peoples R China

通信机构:corresponding author), Anhui Univ Sci & Technol, State Key Lab Min Response & Disaster Prevent & Co, Huainan 232001, Anhui, Peoples R China.

年份:0

外文期刊名:GEOTECHNICAL AND GEOLOGICAL ENGINEERING

收录:EI(收录号:20225213315960);Scopus(收录号:2-s2.0-85144861624);WOS:【ESCI(收录号:WOS:000904029600001)】;

基金:This research was financially supported by the funding of Scientific Research Fund for Young Teachers of Anhui University of Science and Technology(QNZD2021-05); Anhui Province Key Research and Development Plan (2022m07020006); Guizhou Science and Technology Major Projects (Grant No. [2018]3005).

语种:英文

外文关键词:Filling paste; Early strength; Hardening mechanism; Creep hardening; Porocity

摘要:The early strength of filling paste under sulfate solution immersion and creep conditions was analyzed by means of mechanical experiment, theoretical analysis and characterization of experiments. The chemical-physical hardening mechanism of initial strength of filling paste was obtained. Under the immersion of sulfate solution, a large amount of cementing material is formed inside the specimen, which increases the strength of the specimen. As the cementitious material fills the internal pore of the specimen, the strength of the specimen is reduced. According to the uniaxial compressive strength of the filling paste, the creep loading test was designed. Under the creep loading state, the filling paste strength showed the creep hardening characteristics, There are voids and voids in the internal structure of the filling paste specimen, and there is hardening phenomenon under creep conditions. The creep coefficient of saturated specimen is 1.174. Through NMR technology, the porosity of the specimen at the same loading stress level and different loading methods was quantitatively tested, and the compaction effect of creep loading on the gap inside the filling paste is the root cause of creep reinforcement.

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