Thaumasite formation in a tunnel of Bapanxia Dam in Western China

Baoguo Ma; Xiaojian Gao; Ewan A. Byars; Qizhi Zhou

doi:10.1016/j.cemconres.2005.10.011

Thaumasite formation in a tunnel of Bapanxia Dam in Western China

Baoguo Ma
, Xiaojian Gao^*
, Ewan A. Byars
, Qizhi Zhou

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

113 Scopus citations

Abstract

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 (SO₄^2-, CO₃^2- 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.

Original language	English
Pages (from-to)	716-722
Number of pages	7
Journal	Cement and Concrete Research
Volume	36
Issue number	4
DOIs	https://doi.org/10.1016/j.cemconres.2005.10.011
State	Published - Apr 2006
Externally published	Yes

Keywords

Carbonation (C)
Concrete (E)
Sulfate attack (C)
Thaumasite

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10.1016/j.cemconres.2005.10.011

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title = "Thaumasite formation in a tunnel of Bapanxia Dam in Western China",

abstract = "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.",

keywords = "Carbonation (C), Concrete (E), Sulfate attack (C), Thaumasite",

author = "Baoguo Ma and Xiaojian Gao and Byars, \{Ewan A.\} and Qizhi Zhou",

year = "2006",

month = apr,

doi = "10.1016/j.cemconres.2005.10.011",

language = "英语",

volume = "36",

pages = "716--722",

journal = "Cement and Concrete Research",

issn = "0008-8846",

publisher = "Elsevier Ltd",

number = "4",

}

TY - JOUR

T1 - Thaumasite formation in a tunnel of Bapanxia Dam in Western China

AU - Ma, Baoguo

AU - Gao, Xiaojian

AU - Byars, Ewan A.

AU - Zhou, Qizhi

PY - 2006/4

Y1 - 2006/4

N2 - 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.

AB - 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.

KW - Carbonation (C)

KW - Concrete (E)

KW - Sulfate attack (C)

KW - Thaumasite

UR - https://www.scopus.com/pages/publications/33645141129

U2 - 10.1016/j.cemconres.2005.10.011

DO - 10.1016/j.cemconres.2005.10.011

M3 - 文章

AN - SCOPUS:33645141129

SN - 0008-8846

VL - 36

SP - 716

EP - 722

JO - Cement and Concrete Research

JF - Cement and Concrete Research

IS - 4

ER -

Thaumasite formation in a tunnel of Bapanxia Dam in Western China

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Keywords

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