Portal de Periódicos da CAPES

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

2011; Elsevier BV; Volume: 28; Issue: 1 Linguagem: Inglês

10.1016/j.conbuildmat.2011.08.052

1879-0526

Nathan Tregger, Amedeo Gregori, Liberato Ferrara, Surendra Shah,

Concrete and Cement Materials Research

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 (DF) of the slump-flow test. In this study, the time required to reach the final diameter (TF) of the slump-flow test is correlated to dynamic segregation for mixes with a constant DF 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 TF improved dynamic segregation resistance. It was also found that the TF was more indicative of viscosity than the time to reach a diameter of 50 cm (T50).