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

页码：1548 / 1563

页数：16

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