Effect of chloride binding behavior of cement hydration products on chloride critical value of steel corrosion in the presence of Na+ and Ca2+

doi:10.1016/j.jobe.2024.109985

	Effect of chloride binding behavior of cement hydration products on chloride critical value of steel corrosion in the presence of Na+ and Ca2+
	Sun, Ming1,2 ; Sun, Congtao 1,2; Liu, Xiangju 1; Pan, Zihan 3; Duan, Jizhou 1,2; Hou, Baorong 1,2
	2024-10-01
发表期刊	JOURNAL OF BUILDING ENGINEERING
卷号	94 页码:13
通讯作者	Sun, Congtao(suncongtao@qdio.ac.cn) ; Hou, Baorong()
摘要	To accurately predict the service life of concrete structures, the effect of chloride binding behavior of cement hydration products on steel corrosion should be taken into account. In this study, the steel specimen with cement paste coating were prepared to investigate the effect of chloride binding behavior on steel initial corrosion in the presence of Na+ and Ca2+. The results show that the higher pH level and Ca2+ concentration effectively inhibited the leaching C-S-H, while the Ca2+ increased the Ca/Si ratio of C-S-H, thereby enhancing the physical chloride binding capacity of cement paste coating in the CaCl2-Ns system (the addition of CaCl2 in NaOH solution). This enhancement primarily accounted for the higher critical value (Ccrit) of 0.03 mol/L in the CaCl2- Ns system, surpassing that of specimens exposed to other corrosion solutions, which was 0.01 mol/L. Both chloride ions from NaCl and CaCl2 could partially replace carbonate ions in monocarboaluminate (Mc), indicating that the cation type did not exert significant influence on chemical binding in this study.
关键词	Chloride binding Chloride critical value Associated cation C-S-H AFm
DOI	10.1016/j.jobe.2024.109985
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52378276] ; Guangxi Science and Technology Program[Guike AA23026007]
WOS研究方向	Construction & Building Technology ; Engineering
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS记录号	WOS:001260006200001
出版者	ELSEVIER
WOS关键词	CATION TYPE ; SALT-TYPE ; CONCRETE ; MODEL
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/186402
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Sun, Congtao; Hou, Baorong
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Adv Marine Mat, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Guangxi Acad Sci, Inst Marine Corros Protect, Guangxi Key Lab Marine Environm Sci, Nanning 530007, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Sun, Ming,Sun, Congtao,Liu, Xiangju,et al. Effect of chloride binding behavior of cement hydration products on chloride critical value of steel corrosion in the presence of Na+ and Ca2+[J]. JOURNAL OF BUILDING ENGINEERING,2024,94:13.
APA	Sun, Ming,Sun, Congtao,Liu, Xiangju,Pan, Zihan,Duan, Jizhou,&Hou, Baorong.(2024).Effect of chloride binding behavior of cement hydration products on chloride critical value of steel corrosion in the presence of Na+ and Ca2+.JOURNAL OF BUILDING ENGINEERING,94,13.
MLA	Sun, Ming,et al."Effect of chloride binding behavior of cement hydration products on chloride critical value of steel corrosion in the presence of Na+ and Ca2+".JOURNAL OF BUILDING ENGINEERING 94(2024):13.