Rheological and mechanical analysis of self-compacting concrete incorporating rubber aggregates

The objective of this investigation is to clarify the relationships among various rheological and mechanical parameters in order to determine the ideal ratio of rubber aggregate that maintains both the self-compacting properties and the structural integrity of the concrete. This analysis primarily concentrates on the review of the features of rubberized self-compacting concrete (RSCC) by swapping out a quantity of fine and coarse aggregates with rubber aggregates, examining both its fresh and hardened states. A series of rheological examinations were executed on the fresh concrete to quantify its plastic viscosity, yield stress, slump flow diameter, L-box flow ratio, and V-funnel flow duration. For the hardened phase, various assessments were conducted, encompassing evaluations of density, compressive strength, tensile strength, and modulus of elasticity. The findings from this investigation provide invaluable insights for promoting sustainable self-compacting concrete through the efficacious utilization of rubber aggregates, which can assist in addressing escalating infrastructure requirements while mitigating adverse environmental ramifications. Consequently, to attain a equilibrium between self-compaction and concrete strength, the optimal proportions of rubber aggregates proposed in the mixture are 20 % for fine aggregates, 25 % for coarse aggregates, and 20 % for a combination of both fine and coarse aggregates.