LIGHTWEIGHT CONCRETE FOR STRUCTURAL, HEAT-INSULATING AND STRUCTURAL PURPOSES Russian patent published in 2022 - IPC C04B38/08 

FIELD: building materials.

SUBSTANCE: invention relates to building materials, in particular to lightweight concretes for structural, heat-insulating and structural purposes, and can be used in the manufacture of concrete and reinforced concrete products and structures (monolithic, precast-monolithic and prefabricated) used in civil, industrial and transport construction. Lightweight concrete for structural, heat-insulating and structural purposes, obtained from a mixture containing Portland cement, a filler - glass or aluminosilicate hollow microspheres, a polycarboxylate-based hyperplasticizer, a mineral part and water. The mineral part includes quartz sand with a particle size of not more than 5 mm and a fineness modulus of 2.0-2.5, as well as a mixture of crushed silicon opal-cristobalite rocks - diatomite with a specific surface area of ​​2000-2100 m²/kg and a flask with a specific surface area of ​​1300- 1400 m²/kg, used in a mass ratio of 1:1, with the following content of components, wt.%: Portland cement 33.7-50.0, the specified mixture of crushed silicon rocks 2.98-8.1, the specified quartz sand 4, 32-41.3, indicated hollow microspheres 5.15-17.32, indicated hyperplasticizer 0.39-0.55, water - the rest.

EFFECT: reducing the thermal conductivity of lightweight concrete while maintaining the required level of specific compressive strength.

1 cl, 3 tbl