Effects of curing methods of concrete after steam curing on mechanical strength and permeability
Effects of curing methods of concrete after steam curing on mechanical strength and permeability
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DOI：
10.1016/j.conbuildmat.2020.119441
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发表时间：
2020-09-30
影响因子：
7.4
通讯作者：
He, Zhihai
中科院分区：
文献类型：
--
作者：
Liu, Baoju;Jiang, Junyi;He, Zhihai
蒸汽养护引起的混凝土加速硬化会对混凝土的微观结构和性能产生不利影响，因此有必要采用合适的养护方法来减少蒸汽养护对混凝土的损伤。养护方法对蒸养后混凝土性能的影响值得研究。对蒸养混凝土在不同养护条件下的抗压强度、非蒸散水含量和渗透性(空气、水和离子)进行了测试。同时，利用图像处理和扫描电子显微镜对其内部组织进行了分析。结果表明，4种养护方法的蒸养混凝土的抗压强度均随养护时间的延长而增加，但增长速度不同。在空气中养护的混凝土的渗透性随养护时间的延长先减小后增大，而其他养护方法的渗透性随养护时间的延长而减小。微观结构还表明，适当的后续湿养护可以有效地减少蒸汽养护对混凝土的不利影响。(C)2020爱思唯尔有限公司。保留所有权利。
The accelerated hardening of concrete caused by steam curing has adverse effects on the microstructure and properties of concrete, so it is necessary to adopt appropriate curing method to reduce the damage caused by steam curing. The effects of curing methods on the properties of concrete after steam curing are worth studying. The compressive strength, non-evaporable water content and permeability (air, water and ion) of steam-cured concrete were tested under different subsequent curing conditions. Meanwhile, the internal microstructure was also investigated by image processing and SEM. The results show that the compressive strength of steam-cured concrete with four curing methods increases with the curing time, but the growth rates are different. The permeability of the concretes cured in the air decreased first and then increased with the curing time, while other curing methods decreased with curing time. The microstructure also shows that adequate subsequent wet curing can effectively reduce the adverse effects of steam curing on concrete. (C) 2020 Elsevier Ltd. All rights reserved.