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Title |
Effect of Repeated Addition of Admixture on Mechanical Properties of Concrete
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Keywords |
혼화제 ; 반복된 추가 ; 역학적 특성 ; 콘크리트 Admixture ; Repeated addition ; Mechanical properties ; Concrete |
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Abstract |
Concrete used as structural materials in construction fields is supplied as a type of carry and placement by ready-mixed concrete (RMC) truck after proportioning in batch plant. However, during conveying of concrete to the field, due to traffic jam, weather, etc., it is not easy to maintain adequate slump. In this case, we think that the insert of an admixture to concrete has no problem in concrete. For RMC, when the slump is not sufficient, the truck driver insert water additionally without any considerations. After that, concrete is placed after re-mixing and this leads to serious reasons such as strength reduction less than design strength considered in the structural design. Accordingly, in this study, to solve the problem to insert water without realistic reasons in RMC, basic experimental studies were performed. Admixtures used frequently in fields were selected and addition's repeated time and elapsed time interval after initial addition of the admixture were selected as main variables. Authors want that the results of this study is used as basic data to resolve the question.
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