Effect of nano-CaCO3 and nano-SiO2 on improving the properties of carbon fibre-reinforced concrete and their pore-structure models

被引：45
|
作者：
Liu, Rui [1 ,2 ,3 ]
Xiao, Huigang [1 ,2 ,3 ]
Geng, Jishuang [4 ]
Du, Junjie [1 ,2 ,3 ]
Liu, Min [1 ,2 ,3 ]
机构：
[1] Harbin Inst Technol, Key Lab Struct Dynam Behav & Control, Minist Educ, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, Key Lab Disaster Smart Prevent & Mitigat Civil En, Minist Ind & Informat Technol, Harbin 150090, Peoples R China
[3] Harbin Inst Technol, Sch Civil Engn, 73 Huanghe Rd, Harbin 150090, Heilongjiang, Peoples R China
[4] Ansteel Grp Corp, Iron & Steel Res Inst, Anshan 114009, Liaoning, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 244卷 / 244期
基金：
中国国家自然科学基金;
关键词：
Carbon fibre; Nanomaterials; Pore-structure models; Recurrence matrix; MERCURY INTRUSION POROSIMETRY; CEMENT-BASED COMPOSITES; DURABILITY PROPERTIES; MICROSTRUCTURE; PERMEABILITY; IMPROVEMENT; NANOSILICA; WATER; BEHAVIOR; PASTES;
D O I：
10.1016/j.conbuildmat.2020.118297
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this study, nano-CaCO3 and nano-SiO2 were effectively employed to reduce the permeability of carbon fibre-reinforced concrete (CFRC) with a water-cement ratio (W/C) of 0.3 and 0.4. Further, the mechanism of these nanomaterials when modifying the microstructure of CFRC is discussed. It was found that the addition of carbon fibre demonstrated a decrease and increase effect for the permeability of plain concrete (PC) with W/Cs of 0.3 and 0.4. The addition of the nanomaterials makes the microstructure of CFRC with a W/C of 0.3 with a lower porosity, while significantly reducing the connectivity of the microstructure of CFRC with aW/C of 0.4. The effect of these nanomaterials on decreasing the permeability of CFRC is more obvious when the W/C increases from 0.3 to 0.4. Additionally, the effect of nano-CaCO3 and nano-SiO2 on improving the post-peak behaviour of CFRC with a W/C of 0.3 is equally more obvious. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：14
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