Correlations between air permeability coefficients and pore structure indicators of cementitious materials

Correlations between the air permeability coefficient and various pore structure indicators in cementitious materials were examined to determine the pore structure indicator that best evaluated air permeability using data from previous studies. In this study, the air permeability data from sufficiently dried specimens were selected and the effect of pressure on the air permeability was ignored. Among five pore structure indicators, the median and new threshold pore diameters obtained by percolation theory showed higher determination coefficients. The regression equation using the new threshold pore diameter better estimated the air permeability coefficient than the Katz-Thompson equation. (C) 2019 Elsevier Ltd. All rights reserved.