FIELD: chemistry.
SUBSTANCE: invention relates to production of construction materials and specifically to blowing agents and can be used in production of foamed concrete. The gas-forming additive for producing foamed concrete is powder based on aluminium powder and microsilica, wherein 10-60% of the aluminium powder has specific surface area of 6000 - 12000 cm2/g, and microsilica with a regular spherical shape has size of approximately 0.1 mcm, with its content equal to 1-5%.
EFFECT: high uniformity of pore size, short time for preparing the mixture and low fire- and explosion hazard.
2 ex
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