文献类型：期刊文献

英文题名：Effects of curing methods of concrete after steam curing on mechanical strength and permeability

作者：Liu, Baoju[1];Jiang, Junyi[1];Shen, Shuai[2];Zhou, Feng[1];Shi, Jinyan[1];He, Zhihai[3]

机构：[1]Cent South Univ, Sch Civil Engn, Changsha 410075, Peoples R China;[2]China Civil Engn Construct Corp, Beijing 100038, Peoples R China;[3]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China

年份：2020

卷号：256

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000540841400047)、、EI(收录号：20202108673728)、Scopus(收录号：2-s2.0-85084698197)、WOS

基金：This research work was financially supported by the National Key R&D Program of China (2017YFB1201204) and National Natural Science Foundation of China (U1534207). The financial support by the Fundamental Research Funds for the Central Universities of Central South University is also acknowledgment.

语种：英文

外文关键词：Steam-cured concrete; Permeability; Capillary water absorption; Chloride diffusion coefficient; Compressive strength; Curing methods

外文摘要：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.