Construction

By | October 17, 2011

Cells on their effect on the hardiness are divided into three types: back (200 mm) safe (less than 0 1 mm); hazardous (200 to 0, 1 micron). In practice, found that if the ratio of pores with a diameter greater than 200 microns in pore volume with diameters ranging from 200 to more than 0.1 micron is equal to 0.09, then the block wall would have a high resistance to frost. In the real world this ratio for the building blocks are much higher. While this is not grounds for withdrawal of high-value gas silicate frost, but clearly demonstrates the benefits of their resistance to the freeze on Compared with traditional materials. Decrease in the proportion of hazardous since the addition of aerated concrete additives Portland is one of the main reasons for the positive effect on the hardiness of products from cellular concrete. K example, the addition of building blocks of 500-600 kg/m3 density of Portland cement in an amount of 20-25% by weight of dry matter by half reduces the amount of hazardous has a diameter of 0.1-0.2 mm. At the same time increases your frost resistance up to 25 cycles of freezing and thawing.

Based on the above we can conclude that, in comparison with other wall materials autoclaved aerated concrete has a high frost resistance, as it should be noted that this level of frost resistance of gas silicate blocks stored in the least advantaged in terms of frost phase composition of the tumors of gas silicate blocks. With decreasing aerated water saturation of frost is increasing dramatically. In particular, the water saturation of 8 percent by weight of only 20% of the samples showed signs of defects to 1200 cycles of freezing and thawing. On results obledovaniya buildings with a normal temperature and humidity conditions, even when used for 35-40 years, Walling in the construction of which used gas silicate blocks, not found either a defect that could due to the effects of alternate thawing and freezing.


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