Prédiction de la capacité d'un béton frais à remplir un coffrage

Abstract

ABSTRACT The flow and flow stoppage of a homogeneous yield stress fluid in a bounded channel without steel bars are investigated in the first section of this paper. A relation linking the yield stress with the shape of the sample at stoppage is presented. The theoretical solution is then compared to experimental results obtained on Carbopol suspensions. Secondly, the influence of steel bars is considered. A correlation between the thickness variation due to steel bars with the intrinsic properties of the sample (yield stress, density) as well as the geometry of the obstacle (diameter and spacing of the bars) is proposed. This approach is validated by comparing the theoretical solution with experimental data obtained on Carbopol suspensions.