Effects of mix design parameters on consolidation behaviour of fresh cement-based materials

Arnaud Perrot (1) , Damien Rangeard (2)

1 IRDL - Institut de Recherche Dupuy de Lôme
2 LGCGM - Laboratoire de Génie Civil et Génie Mécanique

The consolidation behaviour of fresh cementitious materials is a key factor that governs water-retaining ability of concrete and therefore its bleeding behaviour. Moreover, consolidation theory provides a tool able to predict the heterogeneous W/C (water to cement mass ratio) profile within formwork. Recent studies have shown that bleeding rate of cement-based materials is controlled by the material permeability and the amount of available free water, which can be computed using concrete compressibility. Both parameters can be combined to compute the consolidation coefficient, which describes the whole consolidation process. The aim of this study is to describe the effect of mix-design parameters, such as aggregates volume fraction, water reducing admixture and two fillers, on the consolidation behaviour of fresh cement-based materials. The evolution of both permeability and compressibility of concrete for the three studied mix design parameters are given in this paper. © 2016, RILEM.

Mots clés: Cementitious materials; Cement based material; Bleeding; Mechanical permeability; Consolidation theory; Consolidation coefficient; Consolidation process; Compressibility; Concretes; Consolidation; Water reducing admixtures; Cements; Fresh concrete

Domaines: Génie mécanique [physics.class-ph]; Génie civil

Arnaud Perrot, Damien Rangeard. Effects of mix design parameters on consolidation behaviour of fresh cement-based materials. Materials and structures, 2017, 50 (2), ⟨10.1617/s11527-016-0988-0⟩. ⟨hal-01484739⟩