Correlating dynamic segregation of self-consolidating concrete to the slump-flow test

Abstract

The three key characteristics of self-consolidating concrete are flowability, segregation resistance and passing ability. Quality control of flowability is typically predicted by the final diameter ( D F ) of the slump-flow test. In this study, the time required to reach the final diameter ( T F ) of the slump-flow test is correlated to dynamic segregation for mixes with a constant D F and aggregate-to-binder ratio. Segregation was determined by measuring the radial aggregate distribution from the slump-flow test. It was demonstrated that increasing the T F improved dynamic segregation resistance. It was also found that the T F was more indicative of viscosity than the time to reach a diameter of 50 cm ( T 50 ).