RU2440942C1 - Concrete mixture - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to composition of a concrete mixture and can be used in the industry of construction materials, particularly in production of concrete wall blocks for low-height construction. The concrete mixture, which contains portland cement, expanded clay, keramsite sand, water, contains expanded clay in the 10-20 mm fraction and additionally glass cutting mud, characterised by specific surface area of 800-850 m²/kg and packed density of 760-770 m²/kg and superplasticiser S-3, with the following ratio of components in wt %: portland cement 24.0-26.0, expanded clay 5.8-11.2, keramsite sand 24.0-26.0, said glass cutting mud 24.0-26.0, superplasticiser S-3 0.8-1.2.

EFFECT: making strong concrete articles with high frost resistance.

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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 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 obtain concrete mix with the inclusion of industrial waste for the manufacture of durable concrete products with high frost resistance.

The technical result is achieved by the fact that the concrete mixture, including Portland cement, expanded clay, expanded clay sand, water, additionally contains cuttings cut crystal, characterized by a specific surface of 800-850 m ² / kg and bulk density of 760-770 kg / m ³ and superplasticizer S-3 in the following ratio of components, wt.%: Portland cement 24.0-26.0; expanded clay fraction of 10-20 mm 5.8-11.2; expanded clay sand 24.0-26.0; the specified cut crystal cuttings 24.0-26.0; superplasticizer C-3 0.8-1.2; water 14.0-17.0.

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 24.0 25.0 26.0 Expanded clay (fraction 10-20 mm) 11,2 8.5 5.8 Expanded clay sand cut crystal cut 24.0 25.0 26.0 - with a specific surface of 800 m ² / kg and a bulk density of 760 kg / m ³ 26.0 25.0 - with a specific surface of 850 m ² / kg and bulk density 770 kg / m ³ Superplasticizer S-3 0.8 1,0 1,2 Water 14.0 15,5 17.0 The compressive strength of concrete, MPa not less than 5 not less than 5 not less than 5 Frost resistance cycles not less than 10 not less than 10 not less than 10

Crystal cut cuttings are formed in the process of diamond cutting and chemical polishing of crystal; it contains impurities of corundum and calcite. The waste is a gray-blue powder caked during outdoor storage with a relative humidity of 20-22%. The specific surface of the dried sludge is 800-850 m ² / kg, bulk density 760-770 kg / m ³ .

The components are dosed in the required amounts. Portland cement, expanded clay (10-20 mm fraction), expanded clay sand, cut glass cuttings are mixed, water is added, С-3 superplasticizer is 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. No. 1276650 USSR, 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 contains expanded clay fractions of 10-20 mm and optionally cut crystal cuttings, characterized by a specific surface of 800-850 m ² / kg and bulk density of 760-770 kg / m ² , and C-3 superplasticizer in the following ratio of components, wt.%:
Portland cement 24.0-26.0 expanded clay 5.8-11.2 expanded clay sand 24.0-26.0 specified slurry crystal cut 24.0-26.0 superplasticizer C-3 0.8-1.2 water 14.0-17.0