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Title |
Evaluation on Chloride Binding Capacity of Mineral Mixed Paste Containing an Alkaline Activator
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Authors |
조규환(Gyu-Hwan Cho) ; 여인환(In-Hwan Yeo) ; 지동헌(Dong-Hun Ji) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2016.28.2.157 |
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Keywords |
알칼리 활성화제 ; 고로슬래그 ; 염화물이온 고정화능력 ; C-S-H alkali activator ; GGBS ; chloride binding capacity ; C-S-H |
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Abstract |
It is possible to achieve high strength ranging from 40 MPa to 70 MPa in alkali-activated slag concrete (AASC), and AASC is also known to have a finer pore structure due to its high latent hydraulicity and fineness of slag cement, which makes it difficult for chloride ions to penetrate. Electrophoresis is mostly used to calculate the effective diffusion coefficient of chloride ions, and then to evaluate resistance to salt damage. Few studies have been conducted on the fixation capacity of chloride ions in AASC. For this reason, in this study the chloride fixation within the hardened paste was evaluated according to the type and the amount of alkaline activators. As a result, it was revealed that among the test specimens, the chloride fixation was greatest in the paste containing Na2SiO3. In addition, it was found that as more activator was added, a higher level of chloride fixation was observed. Through this analysis, it can be concluded that the type and the amount of alkaline activators have a high correlation with the amount of C-S-H produced.
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