Rheological Model of Fresh Concrete in Vibrated State

Abstract

Vibration is always used in the concrete construction. The rheological behaviors of vibrated fresh concrete are no longer represented by Bingham model. In this paper, the rheological behaviors of fresh mortar and fresh concrete subjected to vibration were investigated by the RSNS rheometer. For making a comparison, the rheological tests of fresh mortar in static state were also performed. The relationship of shear stress and shear strain rate was examined. Then, a model was presented for describing the rheological behaviors of fresh concrete in vibrated state. The effects of water-cement ratio and water content on the parameters of rheological model were discussed.