Damage evolution of blended cement concrete under sodium sulfate attack in relation to ITZ volume content

被引：23
|
作者：
Wu, Kai [1 ,2 ]
Kang, Wang [1 ]
Xu, Linglin [1 ]
Sun, Dandan [1 ]
Wang, Fazhou [3 ]
De Schutter, Geert [2 ]
机构：
[1] Tongji Univ, Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 201804, Peoples R China
[2] Univ Ghent, Dept Struct Engn, Magnet Lab Concrete Res, B-9052 Ghent, Belgium
[3] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 190卷
基金：
中国国家自然科学基金;
关键词：
Interfacial transition zone; Sodium sulfate attack; Damage evolution; BSE-mapping; Microstructure; MAGNESIUM-SULFATE; LIMESTONE FILLER; GYPSUM FORMATION; MORTARS; RESISTANCE; DURABILITY; PASTES; SLAG; DEGRADATION; MECHANISM;
D O I：
10.1016/j.conbuildmat.2018.09.013
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
To understand the relation between the interfacial transition zone (ITZ) volume content and damage evolution of concrete under sodium sulfate attack, the development of length, mass and dynamic elastic modulus among specimens with varied aggregates was evaluated. After 12 months of exposure, there is a general trend toward increasing expansion, and reducing E-Rd with increasing ITZ volume content for reference and limestone filler blended binary groups. No sign of degradation has been observed in slag blended specimens during the testing age. Element mapping exhibits that the sulfur presented as the form of gypsum tends to locate in the ITZ preferentially. (C) 2018 Published by Elsevier Ltd.
引用
收藏
页码：452 / 465
页数：14
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