BUILDING ELEMENT (EMBODIMENTS) Russian patent published in 2020 - IPC E04B2/86 E04C2/06 E04G11/00 

FIELD: construction.

SUBSTANCE: group of inventions relates to construction, specifically to fixed formwork for construction of walls, floors, ceilings, as well as to construction structures in general, in particular to walls and ceilings, and can be used in designing reinforced concrete structures of buildings and structures. Said technical result is achieved due to the fact that in construction element containing concrete and protective layer made in form of fixed steel fibre reinforced concrete form, according to disclosed invention according to first embodiment, non-detachable steel fibre reinforced concrete formwork is made of self-compacting fine-grained concrete with strength class for axial compression not lower than B80 and at axial tension not lower than Bfbt 10 reinforced by 1.5–3 % by volume steel fibres from high-carbon wire of anchor profile with diameter of not more than 0.3 mm and ratio of length of fibre to its diameter from 95 to 105. In the construction element according to the second embodiment, containing concrete and protective layer, made in the form of fixed steel fibre reinforced concrete casing, according to the declared invention, fixed steel fibre reinforced concrete formwork is made of self-compacting fine-grained concrete with strength class for axial compression of not less than B80 and at axial tension not lower than Bfbt 10 reinforced by 2–4 % by volume of steel fibres from high-carbon wire of wave profile with diameter of not more than 0.3 mm and ratio of length of fibre to its diameter from 50 to 75.

EFFECT: technical result achieved by the claimed group of inventions consists in minimizing the flow of working rod reinforcement by using a fixed steel fibre concrete formwork as a bearing element working for compression, expansion and bending.

2 cl