Evaluation of the rheological properties of self-compacting recycled aggregate concrete

Abstract

In this paper, the rheological behavior of self-compacting concrete (SCC) containing recycled coarse aggregate (RCA) is presented. For this purpose, RCA is obtained from construction and demolition (C&D) waste and replaced in various proportions in the mixes of SCC. The variation of rheological properties such as shear yield stress and plastic viscosity of SCC are evaluated employing the well-established Bingham and Modified Bingham models. Analyzing the results critically, it is observed that with the increase in RCA percentages, the yield stress and plastic viscosity are increased. The increase in both yield stress and plastic viscosity is due to the presence of adhered mortar on the surface of RCA, which increases the friction among the particles and absorbs water. Finally, the field emission scanning electron microscopy (FESEM) analysis is done to justify the phenomenon.