Porosity and permeability evolution during hot isostatic pressing of calcite aggregates

Abstract

Model analyses of the permeability and storativity results indicate both that the pore apertures decrease and that the pore shapes become more equant as the porosity decreases. The marked downturn in the permeability - porosity relationship at total porosities below 0.07 appears from microscopical observation to correspond to a change in pore geometry from largely connected, irregular pores between grains to isolated, tubular pores at junctions of several grains. Application of the "Swiss cheese' continuum percolation model indicates a percolation threshold of about 0.04 porosity. -from Authors Show more