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Title |
Material Properties and Shrinkage Crack Resistance of Concrete Produced with Fluorine-Silicate Hybrid Type Crack Reducing Agent
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Authors |
이만익 ; 박종화 ; 남재현 ; 김도수 ; 김재온 |
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Keywords |
불소-실리카 복합 ; 균열저감제 ; 재료특성 ; 수축균열 저항성 |
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Abstract |
In this study, fluorine-silicate hybrid type crack reducing agent(FS) consisted of fluorine and silicate compounds applied to concrete mix(specification : 25-30-18) between 0.5% and 2.0% at intervals of 0.5% based on cement weight. Experiments for material properties of concrete such as slump, air content and bleeding with elapsed time were performed. Experiment and elucidation for shrinkage crack resistance as well as adiabatic hydration temperature were also carried out. It was appeared that FS addition contributed to lower bleeding and hydration temperature without disturbance of fresh properties of concrete such as slump and air content compared to non-added concrete. Especially, shrinkage crack resistance of concrete resulted from plastic and drying shrinkage could be effectively reduced by the addition of FS ranging from 1.0% to 1.5%.
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