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Title |
Comparison on Characteristics of Concrete Autogenous Shrinkage according to Strength Level, Development Rate and Curing Condition
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Authors |
양은익 ; 신정호 ; 최윤석 ; 김명유 ; 이광명 |
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Keywords |
콘크리트 자기수축 ; 압축강도 ; 강도발현 속도 ; 양생조건 ; 예측모델 concrete autogenous shrinkage ; compressive strength ; strength development rate ; curing condition ; prediction model |
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Abstract |
In this study, autogenous shrinkage strain and prediction models of concrete specimens were compared with strength level and development rate. Also, concrete autogeneous shrinkage under various curing conditions was investigated. The results showed that autogeneous shrinkage increased as concrete strength increased. However, when the concrete strength was almost identical, the initial autogeneous shrinkage of OPC was larger than BFS, but the final autogeneous shrinkage of BFS was larger than OPC. Early wet curing reduced autogeneous shrinkage strain. Especially, when the early wet curing was applied for more than 24 hours, final autogeneous shrinkage was significantly reduced. The results showed that the existing EC2 models do not reflect concrete properties properly. Therefore, the revised model was proposed to better predict autogeneous shrinkage.
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