Absorption Properties of Coarse Aggregate according to Pressurization for Development of High Fluidity Concrete under High Pressure Pumping
고압송용 고유동콘크리트 개발을 위한 가압에 따른 굵은골재의 흡수 특성

Yun-Wang Choi, Byung-Keol Choi, Sung-Rok Oh
2016 Journal of the Korea institute for structural maintenance inspection  
In this study, we developed a pressing device which can reproduce the pressure of concrete inside the conveying pipe as a part of the basic study to development of high fluidity concrete under high pressure pumping. Using this pressing device, we evaluated a absorption properties of aggregate that are crushed coarse aggregate, river gravel and lightweight coarse aggregate according to pressure of coarse aggregate and aggregate inside a high fluidity concrete, focused on the reduction of unit
more » ... er quantity by pressure. In addition, it was evaluated the compressive strength of high fluidity concrete about before and after of pressive. Test a result, case of condition under the high pressure of 250 bar, absorption ratio of crushed coarse aggregate and river gravel were not increased above the surface absorption, absorption ratio of lightweight coarse aggregate was increased than the surface absorption.
doi:10.11112/jksmi.2016.20.3.122 fatcat:d22cgz3kkbg6xbmd5gngihbzlq