SEGREGATION RESISTANCE AND PASSING ABILITY OF HIGH FLUIDITY CONCRETE WITH LOW POWDER CONTENT

Consideration on high fluidity concrete with slump flow of 45cm

Abstract

Segregation resistance and passing ability of high fluidity concrete with slump flow of 45 cm were investigated. The following findings were obtained as the results. (1) The Filling ability with passing between rebars is estimated by PJ value of the J-ring test. (2) The segregation resistance while passing between rebars is not matter too much. (3) The degree of settling of coarse aggregate is estimated by the ratio of coarse aggregate content in chamber B of the box-type filling test with vibration. Moreover, significant that due to excess compaction is estimated by visual examination of the slump flow.