Percolation Evaluation of the Physicomechanical Parameters of Foam-and Biporous Materials

It is shown that to assess the physicomechanical characteristics of foam and biporous materials, it is necessary to determine the threshold concentration of the conductive component, which depends on the elongation of the solid phase particles and the ratio of its average size to the size of macropores. Calculations of the thermal conductivity of foamed corundum and the strength of foamed gypsum have been carried out. The proposed method makes it possible to take into account the porosity of the matrix phase and obtain results that are in good agreement with the experimental values. The considered approach is recommended for evaluating the conductivity and strength of foams in engineering calculations. Tab. 1, ill. 3, bibliography: 9 titles.