Many researchers have attempted to establish relationship between the main technological parameters determining the phase composition of tumors of gas silicate blocks, and frost. These parameters have a bearing on the form of binder, the mixture composition, mode autoclaving. In all experiments, at the same phase composition of the tumor in specimens fixed effect on the frost-aerated form of binder. Reduced frost are building blocks for based on lime, increase the share of cement increases the frost resistance of porous concrete. One of the main factors that contributes to the stability of aerated with alternate freezing and thawing, consider options porosity structure.

Cell to influence the frost resistance can be divided into three categories: reserve (200 m); hazardous (200 to 0, 1 micron) safe (less than 0, 1 micron). Established that if the ratio of pores with a diameter greater than 200 m to the volume of cells with diameters ranging from 200 to 0.1 microns will be more than 0.09, the wall unit will have adequate frost resistance. In practice, this ratio for the aerated concrete is much higher. Although this is not a prerequisite for judging the absolute magnitude frost gas silicate, but clearly demonstrates their advantages in resistance to freezing compared to traditional materials. Changes in specific volume of dangerous then when you add in the silicate cellular concrete additives Portland is one of the main reasons for the positive effect on frost resistance of porous concrete products.

For example, adding a wall blocks a density of 500-600 kg/m3 of portland cement in an amount 20-25% of the total dry matter is cut in half the amount of hazardous cell diameter of 0,1-0,2 mm. In this case, frost gas silicate significantly increased to 25 cycles of alternate freezing and thawing. Analyzing foregoing, we conclude that in comparison with traditional building materials has increased frost aerated, and high levels of frost resistance of aerated concrete is provided at least advantaged in terms of frost phase of aerated tumors. With decreasing moisture content of gas silicate blocks frost resistance increases significantly. For example, at 8% moisture by weight only at 20 percent of samples showing signs of strain appears to 1200 cycles of thawing and freezing. As a result, surveys of buildings with a normal temperature and humidity conditions, even when operating them in for 35-40 years, within the walls of which were used in the construction of gas silicate blocks, not found a single flaw, which would have been a consequence of the influence of alternate thawing and freezing.