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Title |
Properties of Repair Cement Mortar with C12A7-based Alumina Cement and Nitrite for Low Temperature Curing
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DOI |
https://doi.org/10.11112/jksmi.2017.21.4.124 |
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Keywords |
저온환경 ; 알루미나시멘트 ; 아질산염 ; 보수용 모르타르 Low temperature ; Aluminate cement ; Nitrite ; Repair mortar |
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Abstract |
The purpose of this study is to evaluate the basic performance of cement mortar for repair using alumina cement and nitrite can be cured in low temperature environment. For this purpose, the repair mortar used in the domestic construction site was selected and the experimental evaluation was carried out by adjusting the mixing amount by substituting alumina cement and nitrite for the blending ratio. The experimental test results confirmed that alumina cement and nitrite were replaced with the repair mortar, the initial strength was improved. Also, the chemical resistance was improved, the shrinkage behavior was decreased, and the resistance to freezing and thawing was increased. As a result, applying alumina cement and nitrite at a ratio of 2:1 at 7.5%, the surface condition was maintained for 5 months or longer and it was judged to be excellent in practical use for external structures.
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