Even though high performance concrete was developed according to becoming bigger and higher of reinforced concrete building, the rheological evaluation is not enough to use as input data to accomplish the numerical analysis of construction design. Consistency curves were measured by the viscometer as hydration reaction time passed. There are a sudden change of viscosity and yield stress around initial setting in case of low W/B. The increase of workability by the change of free water in cement paste was offset by the coating effect of impermeable layer in case of W/B 40%.

• 박동천(한국해양대학교, 해양공간건축학과, 부교수, 공학박사) | Park, Dong Cheon 교신저자
• 송화철(한국해양대학교, 해양공간건축학과, 교수, 공학박사) | Song, Hwa Cheol