Chloride absorption capacity of calcium silicate hydrate (C-S-H) and its effect on steel corrosion in simulated concrete pore solution

被引：1
|
作者：
Zhang, Yuguo [1 ,2 ,3 ]
Sun, Congtao [1 ,2 ,3 ,4 ]
Zhang, Peng [2 ]
Sun, Ming [1 ,3 ]
Geng, Yuanjie [5 ]
Zhao, Maomi [4 ]
Fan, Liang [1 ,3 ]
Liu, Nazhen [1 ,3 ]
Duan, Jizhou [1 ,3 ]
机构：
[1] Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao, Peoples R China
[2] Qingdao Univ Technol, Sch Civil Engn, Qingdao, Peoples R China
[3] Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Marine Corros & Protect, Qingdao, Peoples R China
[4] Guangxi Acad Sci, Inst Marine Corros Protect, Guangxi Key Lab Marine Environm Sci, Nanning, Peoples R China
[5] Inner Mongolia Univ Sci & Technol, Sch Civil Engn, Baotou, Peoples R China
来源：
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS | 2023年 / 12卷 / 12期
基金：
中国国家自然科学基金;
关键词：
C-S-H; chloride binding; steel corrosion; chloride threshold value; passive film; REINFORCED-CONCRETE; CARBON-STEEL; BINDING; BEHAVIOR; CEMENT; IONS; ENVIRONMENTS; PASSIVATION; ADSORPTION; METAKAOLIN;
D O I：
10.1080/21650373.2023.2243477
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The effect of calcium silicate hydrate (C-S-H) on chloride (Cl-) binding and steel corrosion in simulated concrete pore solution (SCPS) was evaluated. The results showed that Cl- absorbed by C-S-H conformed to Freundlich isotherm for 0.1-1.0 M of Cl-. When C-S-H reached equilibrium in saturated Ca(OH)(2) solution, its degree of polymerization increased. The high pH is unfavorable for the absorption of Cl- by C-S-H, but favorable for the passivation of steel. The synthetic C-S-H powder contains NO3-, which prolongs the passivation time of steel, but the presence of silicate is favorable for the formation of a passivation film with good corrosion resistance. The addition of C-S-H promoted the chloride threshold value of steel corrosion and delayed the corrosion development process.
引用
收藏
页码：1548 / 1563
页数：16
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