RU2493122C1 - Concrete mixture - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to industry of building materials, in particular, to production of concrete wall blocks for low-rise building. Concrete mixture, which includes Portland cement, expanded clay, expanded clay sand, water, additionally contains fibre from synthetic high-molecular compounds, cut into segments 5-25 mm, profiled, obtained by casting through draw plates with profiled openings in form of 3, 5 or 10-pointed star and super-plasticiser C-3 with the following component ratio, wt %: Portland cement 23.0-25.0, expanded clay of 10-20 mm fraction 30.0-36.0, expanded clay sand 17.0-18.6, said fibre 0.2-0.3, super-plasticiser C-3 0.7-1.2, water 23.0-25.0.

EFFECT: increase of frost-resistance of products from concrete mixture.

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Description

The invention relates to the building materials industry, in particular the production of concrete wall blocks for low-rise construction.

Known concrete mixture, including, wt.%: Cement (Portland cement) 21.3-24.2; expanded clay 57.6-64.0; expanded clay sand 8.6-17.8; expanded perlite sand 3.2-4.6; saponified rosin 0.001-0.0012; water [1].

The objective of the invention is to increase the frost resistance of products obtained from concrete mix.

The technical result is achieved by the fact that the concrete mixture, including Portland cement, expanded clay, expanded clay sand, water, additionally contains a fiber of synthetic high molecular weight compounds cut into sections of 5-25 mm, obtained by molding through dies with profiled holes in the shape of a star with 3, 5 or 10 teeth, and C-3 superplasticizer in the following ratio of components, wt.%: Portland cement 23.0-25.0; expanded clay fractions of 10-20 mm 30.0-36.0; expanded clay sand 17.0-18.6; the specified fiber is 0.2-0.3; superplasticizer C-3 0.7-1.2; water 23.0-25.0.

The compositions of the concrete mixture are shown in the table.

Table Components Content, wt.% composition No. 1 composition No. 2 composition No. 3 Portland cement 23.0 24.0 25.0 Expanded clay fractions of 10-20 mm 36.0 33.0 30,0 Expanded clay sand 17.0 17.8 18.6 Fiber made from synthetic high-molecular compounds, cut into segments of 5-25 mm 0.3 0.25 0.2 Superplasticizer S-3 0.7 0.95 1,2 Water 23.0 24.0 25.0 Frost resistance of concrete at the age of 28 days, cycles 35-40 35-40 35-40

As part of the concrete mixture, any (fiber-chain or hetero-chain) synthetic fiber cut into segments of 5–25 mm (fiber from synthetic high-molecular compounds) is used: nylon, nylon 66, nylon 610, lavsan, nitron, etc. Use a profiled synthetic fiber obtained by molding through dies with profiled holes in the shape of a star (with 3, 5 or 10 teeth).

The components are dosed in the required amounts. Portland cement, expanded clay (10-20 mm fraction), expanded clay sand are mixed, water is added, synthetic fiber cut into 5-25 mm sections, C-3 superplasticizer and mixed again. The prepared concrete mixture is placed in metal (pre-lubricated with mineral oil) molds and left to harden.

Information sources

1. A.S. USSR No. 1276650, С04В 28/02, 14/18, 1986, bull. 46.

Claims (1)

Concrete mixture including Portland cement, expanded clay, expanded clay sand, water, characterized in that it further comprises a fiber cut from synthetic high molecular weight compounds cut into 5-25 mm sections, obtained by molding through dies with profiled holes in the shape of a star with 3, 5 or 10 teeth , and C-3 superplasticizer in the following ratio of components, wt.%:
Portland cement 23.0-25.0 expanded clay fractions of 10-20 mm 30.0-36.0 expanded clay sand 17.0-18.6 specified fiber 0.2-0.3 superplasticizer C-3 0.7-1.2 water 23.0-25.0