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Title |
Assessment of the Applicability of Calcium Silicate-Based Repair Mortar
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Authors |
김봉균(Bong-Kyun Kim) ; 이병재(Byung-Jae Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2025.29.6.119 |
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Keywords |
이산화탄소 반응경화 시멘트; 칼슘 설포알루미네이트; 칼슘 알루미네이트 시멘트; 보수재료 Calcium silicate based cement; Calcium sulfoaluminate; Calcium aluminate cement; Repair material |
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Abstract |
In order to enable broader and more direct applications of calcium silicate based cement (CSC), this study investigated the production of mortars based on rapid-hardening cement binders incorporating CSC. The effects of mixture proportion and incorporation of anhydrite gypsum on the fluidity, setting characteristics, and compressive strength of the mortars were evaluated. The results indicate that the fluidity and strength development characteristics of the rapid-hardening binder can be controlled by adjusting both the mixture ratio and the amount of anhydrite gypsum added. Furthermore, the fluidity of cement mortars containing CSC remained generally consistent regardless of the CSC replacement ratio, but the compressive strength at 4 hours and at 7 days decreased as the CSC content increased. Nevertheless, even with up to 40% CSC incorporation, the compressive strength satisfied the requirements for concrete repair materials, suggesting potential for practical use in repair applications.
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