Couplage comportement mécanique et perméabilité

ABSTRACT This experimental study is interested in the chemical degradation effect on the hydraulic behaviour of a cement paste, according to the mechanical loading under temperature. The tests carried out show that the permeability decreases with increase in confining pressure, in a more important way for chemically degraded material. Under creep with weak confining, the permeability of degraded material decreases, contrary to that of sound material, because of the preponderance of the compaction effect with regard to the induced microcracking. Under simultaneous creep and chemical degradation, the permeability increases due to the dissolved chemical products.