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

Damage evolution of blended cement concrete under sodium sulfate attack in relation to ITZ volume content
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混合水泥混凝土在硫酸钠侵蚀下的损伤演化与ITZ体积含量的关系

DOI:
10.1016/j.conbuildmat.2018.09.013
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发表时间:
2018-11
影响因子:
7.4
通讯作者:
De Schutter Geert
De Schutter Geert
中科院分区:
工程技术1区
文献类型:
--
作者:
Wu Kai;Kang Wang;Xu Linglin;Sun D;an;Wang Fazhou;De Schutter Geert

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为了解硫酸钠侵蚀下混凝土界面过渡区体积含量与损伤演化之间的关系,研究了不同骨料混凝土试件的长度、质量和动弹性模量的变化规律.暴露12个月后,总的趋势是膨胀增加,ERd随着ITZ体积含量的增加而降低,以参考和石灰石填料混合二元组。在试验期内,未观察到炉渣混合试样中的降解迹象。元素填图表明,硫以石膏形式存在,倾向于优先分布在界面区。
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 reducingERdwith 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.
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