A rapid immersion measurement for the diffusion constant of chloride ions in the geopolymer concrete

被引:0
|
作者
Wan, Xianglong [1 ,2 ]
Weng, Ancheng [1 ]
Zhang, Shicheng [1 ]
Hu, Jinlang [1 ]
Han, Shiping [1 ]
Cheng, Guojun [1 ,2 ]
Ding, Guoxin [1 ,2 ]
机构
[1] Anhui Univ Sci & Technol, Sch Mat Sci & Engn, Huainan 232000, Anhui, Peoples R China
[2] Anhui Int Joint Res Ctr Nano Carbon Based Mat & En, Huainan 232001, Peoples R China
来源
关键词
One-dimension immersion method; Chloride ion diffusion coefficient; Geopolymer concrete; N-A-S-H gel; Service life prediction; INDUCED CORROSION; DESIGN;
D O I
10.1016/j.jobe.2024.110706
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Accurate measurement of chloride ion diffusion coefficient, without external interference, is essential for obtaining data that closely reflects practical conditions. The diffusion constants of chloride ions within fly ash-based geopolymer concrete (FGPC) with a one-dimension immersion method employed to record the time taken for diffusion to occur over a specific distance were investigated in this work. The results showed a clear relationship between the diffusion constant and the strength of FGPC. Within the same strength of FGPC, the diffusion distance (thickness) is proportional to the square root of diffusion time. The minimum diffusion constant is approximately 8.90 x 10(-11) m(2)/s which is close to the result in an immersion test. The method employed in this study is demonstrated to be both feasible and applicable for assessing the diffusion constant of chloride ions in FGPC quickly. It promotes a rapid evaluation method to predict the diffusion process under practical conditions.
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页数:8
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