“…For all freezing temperatures, the density increased with temperature up to 1100 • C, but it dropped above 1100 • C. On the other hand, both porosity and water absorption decreased monotonically up to 1100 • C, but these rose for the freezing temperatures of −10 and −30 • C and dropped for room temperature and the freezing temperature of −50 above 1100 • C. It is reported that there is a correlation between pore distribution and frost resistance. [2][3][4][5][6]16 was measured by the mercury intrusion method. The results are plotted with the diameter of pore as abscissa against pore volume per unit weight, which was calculated from the data of accumulated pore-size distribution, as ordinate.…”