Drying shrinkage and cracking resistance of concrete made with ternary cementitious components
Drying shrinkage and cracking resistance of concrete made with ternary cementitious components
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DOI：
10.1016/j.conbuildmat.2017.05.113
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发表时间：
2017-09-15
影响因子：
7.4
通讯作者：
de Schutter, Geert
中科院分区：
文献类型：
--
作者：
Hu, Xiang;Shi, Zhenguo;de Schutter, Geert
研究了波特兰水泥、矿渣和粉煤灰三元胶凝体系在干燥条件下的抗压强度、自由和约束干燥收缩以及抗裂性能。按照ASTM C1581进行约束收缩试验（环试验）。结果表明，随着矿渣或粉煤灰掺量从0增加到50%，混凝土28 d抗压强度逐渐降低。自由干燥收缩随矿渣掺量的增加而增大，随粉煤灰掺量的增加而减小。抗裂性与混凝土的自由干燥收缩有很好的相关性，其他因素如强度等对混凝土的抗裂性也有一定的影响。粉煤灰的掺入提高了混凝土的抗裂性，而矿渣掺量达到50%后，混凝土的抗裂性降低。(C)2017爱思唯尔有限公司版权所有
The compressive strength, free and restrained drying shrinkage and cracking resistance of concrete under drying condition were investigated for ternary cementitious systems containing Portland cement, slag and fly ash. The restrained shrinkage test (ring test) was carried out following ASTM C1581. The results showed that the increased replacement level of slag or fly ash from 0 to 50% led to a gradual decrease in 28d compressive strength of concrete. The free drying shrinkage increased with the increase of slag content, but reduced with the fly ash content. The cracking resistance was well related to the free drying shrinkage of concrete, other factors such as strength also showed certain effects on cracking resistance of concrete. The cracking resistance of concrete was enhanced with the addition of fly ash while weakened with the slag replacement level up to 50%. (C) 2017 Elsevier Ltd. All rights reserved.