Effect of mineral admixture on properties of lining concrete under high-temperature rock wall condition

被引：0
|
作者：
Wang, Yan [1 ]
He, Ting-Shu [2 ]
Cheng, Lei [3 ]
Su, Xiao-Feng [3 ]
机构：
[1] Material Science and Engineering Center for Post-doctoral Studies, Xi'an University of Architecture and Technology, Xi'an
[2] State Key Laboratory of Western Architecture and Technology Cultivating Base, Xi'an University of Architecture and Technology, Xi'an
[3] China Railway First Survey and Design Institute Group Co., Ltd., Xi'an
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2015年 / 37卷 / 02期
关键词：
Concrete; Durability; High temperature rock wall; Mechanical property; Mineral admixture concrete;
D O I：
10.3969/j.issn.1001-8360.2015.02.018
中图分类号：
学科分类号：
摘要：
Tunnel construction under high temperature rock wall condition presents new technical problems that arise with high-speed transportation network continuously extending in the world. These special construction conditions can influence the mechanical properties and durability of lining concrete in the tunnel. Through laboratory simulation of construction environment under high temperature rock wall condition, this paper focuses on investigation on the influence rule of mineral admixture on the mechanical properties and durability of lining concrete under this condition. Results show that compressive strength of both normal and mineral admixture concrete decreased under high curing temperature rock wall environment. When humidity was 50%, the compressive strength of slag concrete decreased significantly with increase of the curing temperature, and the compressive strength of fly ash concrete had the minimum drop. However, when the temperature was higher than 50℃, the strength of fly ash concrete was higher than that of the slag concrete. Slag concrete strength is the most sensitive to humidity changes. When temperature was 80℃, the compressive strength of slag concrete increased significantly with increase of the curing humidity. Anti-permeability and carbonation resistance of different kinds of concrete declined with the increase of curing temperature. Thereinto, the durability of the ordinary concrete dropped off significantly, while the anti-permeability and carbonation resistance of fly ash concrete were least affected. ©, 2015, Science Press. All right reserved.
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页码：118 / 124
页数：6
相关论文
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