無機建材の耐凍害性に関する細孔の定量形態学的解析

抄録

The frost susceptibility of inorganic porous building materials was discussed from a viewpoint of quantitative analysis of internal pore structures. The analysis was undertaken on the basis of a couple of black-and-white image data, such as two dimensional pore-size distribution and three dimensional pore-connecting texture being constructed by a computer from original SEM photographs. The results were summarized as follows. The frost susceptibility showed excellent correlations with factors obtained by the quantitative analysis of pore-connecting texture. They are (a) an averaged shape factor (S) of the deviation from the perfect circle, a variance and a standard deviation about (S); (b) a distribution of (S) along with the polishing direction and a branching degree in a three dimensional connecting texture of pores; and (c) a fractal dimension calculated from the data of an accumulated pore-size distribution which was measured by the mercury-intrusion method. It is suggested that they should be used as promissing factors for the indirect evaluation of the frost susceptibility of inorganic building materials.