Internal sulfate attack on concrete caused by gypsum-bearing aggregates

Zhishui Xing; Min Deng; Aiguo Wang; Kaiwei Liu

doi:10.3969/j.issn.1007-9629.2014.01.006

Internal sulfate attack on concrete caused by gypsum-bearing aggregates

Zhishui Xing, Min Deng, Aiguo Wang, Kaiwei Liu

材料科学与工程学院

科研成果: 期刊稿件 › 文章 › 同行评审

3 引用（Scopus）

摘要

Some concrete samples taken from Shiziya tunnel in Hubei province were analyzed by XRD, SEM/EDS, BSEM/EDS, optical microscope and micro-hardness device. It is shown that deterioration of concrete in the form of cracking, and decrease of cohesion and strength are caused by the internal sulfate attack caused by gypsum-bearing dolomite coarse aggregates. Ettringite and thaumasite are formed in the interface transition zone between gypsum in the coarse aggregate and mortars. Therefore, the structures of the interface transition zone and the matrix are loose and porous, the micro-hardness is reduced.

源语言	英语
页（从-至）	30-34+41
期刊	Jianzhu Cailiao Xuebao/Journal of Building Materials
卷	17
期	1
DOI	https://doi.org/10.3969/j.issn.1007-9629.2014.01.006
出版状态	已出版 - 2014

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title = "Internal sulfate attack on concrete caused by gypsum-bearing aggregates",

abstract = "Some concrete samples taken from Shiziya tunnel in Hubei province were analyzed by XRD, SEM/EDS, BSEM/EDS, optical microscope and micro-hardness device. It is shown that deterioration of concrete in the form of cracking, and decrease of cohesion and strength are caused by the internal sulfate attack caused by gypsum-bearing dolomite coarse aggregates. Ettringite and thaumasite are formed in the interface transition zone between gypsum in the coarse aggregate and mortars. Therefore, the structures of the interface transition zone and the matrix are loose and porous, the micro-hardness is reduced.",

keywords = "Aggregate, Concrete, Ettringite, Gypsum, Sulfate attack, Thaumasite",

author = "Zhishui Xing and Min Deng and Aiguo Wang and Kaiwei Liu",

year = "2014",

doi = "10.3969/j.issn.1007-9629.2014.01.006",

language = "英语",

volume = "17",

pages = "30--34+41",

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TY - JOUR

T1 - Internal sulfate attack on concrete caused by gypsum-bearing aggregates

AU - Xing, Zhishui

AU - Deng, Min

AU - Wang, Aiguo

AU - Liu, Kaiwei

PY - 2014

Y1 - 2014

N2 - Some concrete samples taken from Shiziya tunnel in Hubei province were analyzed by XRD, SEM/EDS, BSEM/EDS, optical microscope and micro-hardness device. It is shown that deterioration of concrete in the form of cracking, and decrease of cohesion and strength are caused by the internal sulfate attack caused by gypsum-bearing dolomite coarse aggregates. Ettringite and thaumasite are formed in the interface transition zone between gypsum in the coarse aggregate and mortars. Therefore, the structures of the interface transition zone and the matrix are loose and porous, the micro-hardness is reduced.

AB - Some concrete samples taken from Shiziya tunnel in Hubei province were analyzed by XRD, SEM/EDS, BSEM/EDS, optical microscope and micro-hardness device. It is shown that deterioration of concrete in the form of cracking, and decrease of cohesion and strength are caused by the internal sulfate attack caused by gypsum-bearing dolomite coarse aggregates. Ettringite and thaumasite are formed in the interface transition zone between gypsum in the coarse aggregate and mortars. Therefore, the structures of the interface transition zone and the matrix are loose and porous, the micro-hardness is reduced.

KW - Aggregate

KW - Concrete

KW - Ettringite

KW - Gypsum

KW - Sulfate attack

KW - Thaumasite

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U2 - 10.3969/j.issn.1007-9629.2014.01.006

DO - 10.3969/j.issn.1007-9629.2014.01.006

M3 - 文章

AN - SCOPUS:84897149033

SN - 1007-9629

VL - 17

SP - 30-34+41

JO - Jianzhu Cailiao Xuebao/Journal of Building Materials

JF - Jianzhu Cailiao Xuebao/Journal of Building Materials

IS - 1

ER -

Internal sulfate attack on concrete caused by gypsum-bearing aggregates

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