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Title |
Characteristics of Excess Water Dewatered Concrete Using Permeable Liner
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DOI |
https://doi.org/10.4334/JKCI.2013.25.6.675 |
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Keywords |
투수시트 ; 측압 ; 탈수량 ; 물-결합재비 ; 타설높이 permeable liner ; lateral pressure ; dewatered quantity ; water to binder ratio ; placing height |
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Abstract |
In this study, to enhance the quality of concrete surface by removing the surplus water, permeable liner attached the euroform was applied for manufacturing concrete specimens. Various kinds of concrete mixtures with different water to binder ratios were applied and the strength properties of the hardened concrete surfaces were evaluated at different heights. Experimental results showed that the rebound values by schmidt hammer test and the compressive strengths on the surfaces of concrete specimens were increased as proportion to the amount of mixture water which is dependent on the water to binder ratio of each concrete mixture, and more enhancements were observed on the middle and lower specimen surfaces than the upper region. SEM analysis also showed that much denser hydrate structures were observed on the specimen surfaces by the application of the permeable liner while similar hydrate formations were occurred regardless of surface treatment conditions. From the MIP test results of the concrete surfaces, it was observed that, by the application of permeable liner, the pore volume below 0.01 μm was decreased with a maximum of 50% resulting in the densification of pore structures.
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