Investigating freeze-proof durability of C25 shotcrete

被引：57

作者：

Chen, Jianxun ^{[1
]}

Zhao, Xizhong ^{[2
]}

Luo, Yanbin ^{[1
]}

Deng, Xianghui ^{[1
]}

Liu, Qin ^{[3
]}

机构：

[1] Changan Univ, Sch Highway, Xian 710064, Peoples R China

[2] Xinjiang Uygur Autonomous Reg Highway Engn Qual S, Urumqi 830000, Peoples R China

[3] Changan Univ, Sch Civil Engn, Xian 710061, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2014年 / 61卷

关键词：

C25; shotcrete; Freeze-thaw cycles; Durability index; Characteristic parameter of bubbles; STRENGTH DEVELOPMENT; CONCRETE;

D O I：

10.1016/j.conbuildmat.2014.02.077

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Currently, shotcrete was extensively used in civil engineering. In this study, the influence of an air-entraining agent on freeze-proof durability was investigated using C25 shotcrete via the laboratory tests of the mass loss, dynamic modulus of elasticity, ultrasonic wave velocity and cubic compressive strength. Then, characteristic parameters of bubbles in shotcrete were investigated in order to discover the inner structure of shotcrete. The test results showed the freeze-proof durability index of shotcrete with an air-entraining agent was more than 80% after 300 freeze-thaw cycles. Meanwhile, the freeze-proof durability of shotcrete mixed with the air-entraining agent was better than ordinary shotcrete. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：33 / 40

页数：8

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