Experimental investigation on sealing efficiency of CNT composite grouts in inclined fractures with flowing water

被引：11
作者：
Liu, Yaohui [1 ,3 ]
Zhang, Lei [1 ]
Yang, Ping [1 ,2 ]
Wei, Xiao [3 ]
机构：
[1] Tongji Univ, Coll Civil Engn, Dept Geotech Engn, Shanghai 200092, Peoples R China
[2] Tongji Univ, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China
[3] Natl Univ Singapore, Dept Civil & Environm Engn, Singapore, Singapore
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 270卷
基金：
上海市自然科学基金; 中国国家自然科学基金;
关键词：
Carbon nanotube; Flowing water grouting; Inclined fracture; Sealing efficiency; Silica fume; REINFORCED CEMENTITIOUS COMPOSITES; CARBON NANOTUBE; FLY-ASH; MECHANICAL-PROPERTIES; COMPRESSIVE STRENGTH; MICROSTRUCTURE; CONCRETE; SILICA; DURABILITY; BEHAVIOR;
D O I：
10.1016/j.conbuildmat.2020.121494
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A series of physical simulation tests were conducted to investigate performance of carbon nanotube (CNT) composite grouts in inclined fracture grouting with flowing water. The viscosity of grouts increases with an increase of CNTs content. Silica fume can improve the dispersion of CNTs and maximal fluid pressure of CNT composite grouts. Orthogonal experimental results shows that sealing efficiency (SE) of CNT composite grouts increases with an increase of CNTs and a decrease of initial flowing rate. Slight inclination can improve the SE of CNT composite grouts and superfluous silica fume has limited effects on SE. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：9
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