In this research, the rheological properties of mortar under high pressure were measured in order to investigate the cause of segregation of concrete after pumping. A rheometer with high pressure cell was used to measure rheological properties under 100 bar to 200 bar. The rheological properties were measured at three steps; before pressurization and after pressurization. The rheological properties of high-range water reducing admixture were measured by different composition ratio. The viscosity curve was used for the measurement, and the results were analyzed using a sisko-model.

• 한성호(한국과학기술원 건설 및 환경공학과) | Han Seong-Ho
• 김재홍(한국과학기술원 건설 및 환경공학과) | Kim Jae-Hong