The effect of supplementary cementitious materials on the permeability of chloride in steam cured high-ferrite Portland cement concrete
The effect of supplementary cementitious materials on the permeability of chloride in steam cured high-ferrite Portland cement concrete
复制标题
辅助胶凝材料对蒸汽养护高铁素体硅酸盐水泥混凝土氯离子渗透性的影响
DOI：
10.1016/j.conbuildmat.2018.11.107
复制
发表时间：
2019-02-10
影响因子：
7.4
通讯作者：
Wang, Caixia
中科院分区：
文献类型：
--
作者：
Huang, Xiao;Hu, Shuguang;Wang, Caixia
高铁硅酸盐水泥(HFPC)作为一种典型的耐硫酸盐硅酸盐水泥，受到了广泛的关注，有望在海洋环境中得到应用，但其抗氯性是一个首要问题，需要显著提高。因此，本研究探讨了养护温度和辅助胶凝材料(SCM)对HFPC预制混凝土中氯离子迁移的影响。结果表明，硅灰(SF)和偏高岭土(MK)两种具有代表性的自密实混凝土能够显著提高蒸养HFPC混凝土的抗氯离子渗透性能。SF的改善机理是基于优化孔结构以延缓氯离子的迁移，而MK的改善机理是基于促进氯离子的结合能力。本研究可为海洋环境中具有优良的抗硫酸盐和氯离子侵蚀性能的新型预制混凝土提供参考。(C)爱思唯尔有限公司出版的2018年。
As a typical kind of sulphate resistance Portland cement (SRPC), high-ferrite Portland cement (HFPC) has drawn extensive interesting, and is expected to be used in marine environment, but the low chloride resistance is a primary issue and requires to be notably enhanced. This study therefore has investigated the effects of the curing temperature and supplementary cementitious materials (SCMs) on chloride migration in HFPC precast concrete. The results show that two representative SCMs, namely, silica fume (SF) and metakaolin (MK), could significantly improve the resistance of steam cured HFPC concrete to chloride permeation. The improving mechanism of SF is based on optimization of the pore structure to retard migration of chloride, while MK is based on promotion of the chloride binding capacity. This study could give an insight into a new type of precast concrete with excellent sulphate and chloride resistance in marine environment. (C) 2018 Published by Elsevier Ltd.