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Title |
The Properties of OPC-Slag Cement Mixed with Nano-Silica Solution by Mixing Water Weight Replacement Method
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Authors |
서기영(Ki-Young Seo) ; 김태완(Taewan Kim) ; 김성도(Seong-Do Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.1.24 |
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Keywords |
나노실리카 솔루션; 배합방법; 배합수 중량치환 nano-silica solution; mixing method; weight-replacement of mixing water |
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Abstract |
This research is a study on the characteristics of OPC-slag cement using nano-silica solution (NSS) with water-weight substitution method. The new replacement method is a fundamental step to study the behavior of cement with higher NSS replacement rates than previous studies. NSS was replaced by 10%, 20%, 30%, 40%, and 50% of the mixing water weight. As a result, the mechanical and microstructural characteristics were improved. This can be summarized in two ways. First, when the NSS is replaced with mixing water, the homogeneous dispersion action of the nano-silica particles is improved. This promotes initial hydration. Second, substitution of NSS with higher density than mixing water reduces w / b. This forms a dense hydration reaction material. The new substitution method did not show any degradation of mechanical and microstructural properties as compared with the results using the powdered nano-silica particles revealed in the previous study. Therefore, it is considered that the method of weight substitution of NSS used in this study can be applied to the formulation of OPC-slag cement.
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