Experimental study of gas and liquid permeability of a mortar

Eight samples cored from the same mortar were used to investigate their respective gas, ethanol and water permeability. Two gas and liquid permeability cells, using special devices for measuring the injected flow under steady conditions, were designed and presented in this paper. The obtained results showed that water permeability was systematically lower (in an order of magnitude from 1 to 2) than gas permeability whereas ethanol permeability was intermediate between these two values. Nevertheless, ethanol and gas permeabilities were found of the same order and, when gas permeability is corrected from the Klinkenberg (or slippage) effect, the results given by these two fluids are virtually identical and can be considered to be the intrinsic permeability value. Thus, the differences observed between water and gas permeability values have to be explained by other phenomena such as rehydration, dissolution and migration of fine elements or water adsorption in the thinnest pores.

[1]  Carola Edvardsen,et al.  Water Permeability and Autogenous Healing of Cracks in Concrete , 1999 .

[2]  D. Perraton,et al.  Permeabilities of Silica Fume Concrete , 1988 .

[3]  Rachel J. Detwiler,et al.  Water permeability and microstructure of three old concretes , 1994 .

[4]  F. Skoczylas,et al.  An experimental study of the mechanical behaviour of a mortar and of its permeability under deviatoric loading , 1999 .

[5]  M. Carcasses,et al.  Gas permeability of concrete in relation to its degree of saturation , 1999 .

[6]  Jacques Marchand,et al.  Modeling the behavior of unsaturated cement systems exposed to aggressive chemical environments , 2001 .

[7]  P B Bamforth,et al.  The relationship between permeability coefficients for concrete obtained using liquid and gas , 1987 .

[8]  R. K. Dhir,et al.  Near surface characteristics of concrete: intrinsic permeability , 1989 .

[9]  Hans W. Reinhardt,et al.  Gas permeability coefficient of cover concrete as a performance control , 1997 .

[10]  D. Whiting,et al.  Permeability of Concrete , 1988 .

[11]  Olovier Coussy,et al.  Mecanique des Milieux Poreux , 1992 .

[12]  J. H. Bungey,et al.  Testing concrete in structures , 1989 .

[13]  F. Skoczylas,et al.  A study of the intrinsic permeability of granite to gas , 1995 .

[14]  L. Klinkenberg.  The Permeability Of Porous Media To Liquids And Gases , 2012 .

[15]  H. Mörtel,et al.  Measurement of the gas permeability of autoclaved aerated concrete in conjunction with its physical properties , 1995 .