Thaumasite formation in a tunnel of bapanxia dam in Western China

被引：83
作者：
Ma, BG
Gao, XJ [1 ]
Byars, EA
Zhou, QZ
机构：
[1] Wuhan Univ Technol, Minist Educ, Key Lab Silicate Mat Sci & Engn, Wuhan 430070, Peoples R China
[2] Univ Sheffield, Dept Civil & Struct Engn, CMRU, Sheffield S1 3JD, S Yorkshire, England
[3] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England
来源：
CEMENT AND CONCRETE RESEARCH | 2006年 / 36卷 / 04期
基金：
中国国家自然科学基金;
关键词：
concrete; thaumasite; sulfate attack; carbonation;
D O I：
10.1016/j.cemconres.2005.10.011
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A site investigation and sampling was carried out on a sulfate-attacked concrete structure in Bapanxia Hydraulic Power Plant in Western China. The concrete had been exposed to ground water containing substantial concentrations of salts (SO42-, CO32- and Cl-) for about 6 years and was analyzed with X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), laser-Raman spectroscopy and Fourier transform infrared (FTIR) spectroscopy. It is shown that a white mushy mixture consisting of thaumasite, ettringite, gypsum and calcite is present in the residual concrete. This paper reports the first instance of the thaumasite form of sulfate attack of concrete in China. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：716 / 722
页数：7
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