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Title |
A Study on the Characteristic of Capillary Pore and Chloride Diffusivity by Electrical Differece of High-Strength Concrete Using Metakaolin
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Keywords |
메타카올린 ; 모세관공극 ; 수은압입법 ; 공극 구조 ; 염소이온 확산계수6 |
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Abstract |
According to the high demand of concrete structures with high performance, various studies have examined on the high performance concrete, especially high strength concrete. Various admixtures are required to produce high strength concrete and silica fume has been the most popular admixture. Recently, however, metakaolin, which is similar to silica fume in properties but cheaper, has been introduced to high strength concrete. In this study, high-strength concrete using metakaolin were studied of capillary pore structure by mercury intrusion porosimetry technique and the accelerated chloride diffusivity by electrical difference. In result, it was found that the pore structure improved and compressive strength increased and chloride diffusivity reduced as more metakaolin content was added. In addition, a regression analysis of 5~2,000mm pore volume and both compression strength and chloride diffusivity revealed that each these had a high correlation of about 0.76 and 0.68.
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