Dosage effect of superplasticizer on self-compacting concrete: correlation between rheology and strength

Abstract

This study presents the relationship between the rheology and the compressive strength of self-compacting concrete (SCC). The concrete mixes contained eight different dosages of superplasticizer. The used rheology measurements are the slump flow, V-funnel, L-box, yield stress and plastic viscosity. The used mechanical tests are the compressive strength. The superplasticizer effect on these rheological and mechanical properties will be studied in more details.Based on experimental tests, the results obtained show that the slump-flow diameter, L-box ratio, V-Funnel time, yield stress, plastic viscosity and compressive strength were correlated a high level. At 1 day, the best fit-curve representing this relationship is given by:Compressive strength value (MPa)=[−1.19×slump flow diameter value]+120;Compressive strength value (MPa)=[1.82×V−Funnel time value]+9;Compressive strength value (MPa)=[−148.4×H2/H1 ratio value]+167;Compressive strength value (MPa)=[0.71×Yield stress value]+18;Compressive strength value (MPa)=[0.20×Viscosity value]+18. Keywords: Rheology, Compressive strength, Superplasticizer, Yield stress, Plastic viscosity, Slump-flow