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Title |
Fundamental and Shrinkage Properties of High Performance Concrete in Combined with Expansive Additive and Shrinkage Reducing Agent
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Keywords |
고성능콘크리트; 건조수축; 자기수축; 팽창재; 수축저감제; high performance concrete; drying shrinkage; autogenous shrinkage; expansive additive; shrinkage reducing agent |
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Abstract |
This study investigated the fundamental properties and shrinkage properties of high performance concrete with water/binder ratio of 0, 30 and with combination of expansive additive and shrinkage reducing agent. According to the results, the fluidity of high performance concrete showed lower the using method in combination with expansive additive and shrinkage reducing agent than the separately using method of that, so the amount of superplasticizer increased when the adding ratio of expansive additive and shrinkage reducing agent increased. However the air content of concrete increased when used in combination with expansive additive and shrinkage reducing agent, so the amount of AR agent decreased. The compressive strength showed the highest at 5% of expansive additive, and decreased with an increase of the amount of shrinkage reducing agent. Furthermore, in order to reduce the shrinkage of high performance concrete, it was found that the using method in combination with expansive additive and shrinkage reducing agent was more effective than separately using method of that. Therefore, it analyzed that the combination of expansive additive of 5% and shrinkage reduction agent of 1% was the most suitable mixture, considering to the fluidity, strength and shrinkage under the condition of this experiment.
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