Damage evolution in cement mortar due to erosion of sulphate

被引：143
作者：
Chen, Jian-kang [1 ]
Jiang, Min-qiang [2 ]
Zhu, Jue [1 ]
机构：
[1] Ningbo Univ, Mech & Mat Sci Res Ctr, Ningbo 315211, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Zhongguancun, Peoples R China
来源：
CORROSION SCIENCE | 2008年 / 50卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Sulphate erosion; Ultrasonic technique; Microdamage evolution; Wave velocity;
D O I：
10.1016/j.corsci.2008.05.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ultrasonic technique is used to detect the velocity change of stress wave propagated in the cement mortar immersed in the solution of sodium sulfate for 425 days. Also the density change of specimens at different erosion time is measured. By curve fitting, the effect of solutions' concentration and water/cement ratio on the damage evolution is analyzed. The SEM observation on the growth of delayed ettringite is also performed. It shows that the damage evolution of specimens attacked by sulphate solution is dominantly induced by the nucleation and growth of delayed ettringite, and the average size of microvoids in cement mortar affects the damage evolution significantly. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2478 / 2483
页数：6
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