DETERMINATION OF THE SURFACE FRACTAL DIMENSION FOR POROUS-MEDIA BY MERCURY POROSIMETRY

A scaling relation is presented after a concrete analysis of the prope rties of topology and mercury porosimetry processes for porous media. Then a new method and the corresponding procedure using the above scal ing relation are set up in order to obtain the surface fractal dimensi ons of porous media from the experimental data of mercury intrusion. I n contrast with the existing methods of this kind exhibited in literat ure, the results simulated by means of the method here for several kin ds of porous media conform to the prerequisite for being surface fract als, which means the surface fractal dimensions should be in the very range: 2 less-than-or-equal-to D < 3. At the same time, this method gi ves almost the same surface fractal dimensions as the adsorption metho d. The evidence deduced from the results and analyses of this paper sh ows that this method may be a promising one to decide or at least esti mate the surface fractal dimension for porous media.