A Fundamental Study on the Workability Improvement and Strength Properties of Superplasticized Concrete(I) (Part 1, In the Case of Fluidity Performance and Properties of Fresh Concrete)

유동화 콘크리트의 시공성 향상 및 강도특성에 관한 기초적 연구(I) (제1보, 아직 굳지 않은 콘크리트의 유동화성상을 중심으로)

The effect of superplasticizing agents on the sorkability performance in fresh concrete have been analyzed and investigated under various mix proportions of water cement ratio of 0.40, 0.50, 0.60 and 0.70, superplasticizing agents of NL-4000 and Rheobuild-716, and addition rate of sp. agents of 0.0, 0.5, 1.0, 1.5 and 2.0 in the practical range. It is the aim of this study to provide the fundamental data on the fluidity performance and workability improvement of superplasticized concrete such as time-dependent change of slump, flow value and compacting factor, air content, bleeding, mixing temperature and setting rate of fresh concrete comparing with base concrete and conventional concrete for the practical use and research data accumulation of superplasticized concrete in the side of development of concrete construction technology and management.