The article considers a technical solution for the introduction of pozzolan additives into the cement after grinding clinker. Such additives are the fly ash of the CHP and ash from the ash dump. The use of ash in the composition of cement reduces its cost and energy intensity of its production

The article compares, according to the estimated cost, the solutions for the ceilings of steel-reinforced concrete and lightweight buildings with the use of foam concrete slabs on corrugated board. It has been determined that the foam concrete floor is more constructive, technologically ad-vanced and economical

The article discusses lightweight floors of buildings made of thin-walled bent metal profiles with the use of foam concrete filling. The proposed overlap solution is technologically simple, economical and meets the requirements of fire and earthquake resistance