Estimating the segregation of concrete based on mixture design and vibratory energy

Abstract

Controlling the segregation of concrete during construction is important for assuring design strength and durability. This paper aims to model segregation by assessing how the stability of fresh concrete is affected by the maximum size and density of coarse aggregates (CA), mortar viscosity, maximum acceleration during vibration, and vibration time. The results show that CA properties have the greatest effect on the stability of concrete under vibration, followed by the mortar viscosity and the energy applied by unit mass of concrete. Therefore, the tendency of a concrete mixture to segregate or remain uniform is mostly controlled by the mixture design rather than by the vibration process.