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Title |
The Statistical Hypothesis Verification to Influence of Addition of Metakaolin and Silica Fume on Compressive Strength and Chloride Ion Penetration of High Strength Concrete
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Keywords |
메타카올린 ; 실리카퓸 ; 가설검증 ; 분산분석 ; 염소이온 투과저항성 ; 혼화재 Metakaolin ; Silica fume ; Hypothesis verification ; RCPT ; Mineral admixture |
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Abstract |
Metakaolin is a dehydroxylated form of the clay mineral kaolinite. Rocks that are rich in kaolinite are known as china clay or kaolin, traditionally used in the manufacture of porcelain. The particle size of metakaolin is smaller than cement particles, but not as fine as silica fume. This paper investigates the effect of the concrete containing metakaolin as a mineral admixture on the compressive strength and resistance properties to chloride ion penetration. In this study, the experiment was carried out to investigate and analyze the influence of replacement ratio of metakaolin and micro silica fume on the compressive strength and chlorine ion penetration resistance of concrete. All levels were water/binder ratio 30%, replacement ratio of metakaolin and silica fume were 0, 5, 10, 15, 20% respectively. The compressive strength of concrete using metakaolin tends to increase, as the replacement ratio increases but the chlorine ion penetration resistance was not so as lager as silica fume concrete. Therefore, the optimum mixing ratio of metakaoline to satisfy a properties of compressive strength and chlorine ion penetration resistance was was approximately10%.
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