RU2430050C1 - Concrete mix - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: concrete mix contains the following components, wt %: portland cement 23.0 - 27.0, ash slag filler 50.0 - 55.0, crumb of gas filled plastic with particle size of up to 10 mm 0.2 - 0.3, organo-silicon compound GKZh-10 or GKZh-11 0.5 - 0.9, superplasticiser S-3 0.5 - 0.9, liquid glass 1.0 - 1.5, water - balance.

EFFECT: increased water resistance of concrete.

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Description

The invention relates to the building materials industry, in particular to the production of lightweight concrete wall blocks that can be used in the construction of storage facilities, garages, fences.

Known concrete mixture containing, by weight: portland cement 1.0; ash and slag filler 3.6-9.7; a crumb of gas-filled plastic (polyethylene foam) with a particle size of up to 10 mm 0.024-0.009; water 0.6-1.1 [1]. The water absorption of concrete obtained from such a mixture is 5.2%.

The objective of the invention is to increase the water resistance of concrete.

The technical result is achieved by the fact that the concrete mixture containing Portland cement, ash and slag filler, gas-filled plastic chips with a particle size of up to 10 mm, water, further includes GKZh-10 or GKZh-11, superplasticizer S-3, liquid glass in the following ratio of components, wt .%: Portland cement 23.0-27.0; ash and slag filler 50.0-55.0; gas-filled plastic crumb 0.2-0.3; GKZH-10 or GKZh-11 0.5-0.9; superplasticizer C-3 0.5-0.9; water glass 1.0-1.5; water is the rest.

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

Table 1 Components Content, wt.%: composition No. 1 composition No. 2 composition No. 3 Portland cement 23.0 25.0 27.0 Ash and slag filler 55.0 53.0 50,0 Gas-filled plastic 0.2 0.25 0.3 GKZH-10 0.5 0.7 - GKZH-11 - - 0.9 Superplasticizer S-3 0.5 0.7 0.9 Liquid glass 1,5 1.3 1,0 Water 19.3 19.05 19.9 Softening coefficient, not less 0.7 0.7 0.7

Superplasticizer C-3 is a mixture of polymer compounds neutralized with sodium hydroxide of different relative molecular weights obtained by condensation of naphthalene sulfonic acids with formaldehyde and technical lignosulfonates (TU 254-1298281-031-90).

Organosilicon liquids: GKZh-10 - sodium ethylsiliconate and GKZh-11 - sodium methylsiliconate, clear liquids from pale yellow to brown (TU 6-02-6978-72).

To obtain crumbs, the waste (scraps, defective or outdated products) of any gas-filled plastic (polyethylene foam, expanded polystyrene, etc.) is ground to obtain particles up to 10 mm in size. Such particles have an uneven rough surface, which as part of the concrete mix improves their adhesion to cement stone.

Any (sodium or potassium) liquid glass with a density of 1300-1500 kg / m ^{3 is used} .

To prepare the concrete mixture, the raw materials are prepared: Portland cement, ash and slag filler with a density of 1450 kg / m ³ , water, gas-filled plastic crumb, GKZh-10 or GKZh-11, superplasticizer S-3, liquid glass with a density, in this case, 1400 kg / m ³ . An ash-and-slag filler is mixed with Portland cement, water with liquid glass dissolved in it, S-3, GKZh-10 or GKZh-11 superplasticizer are added and a polystyrene foam crumb up to 10 mm in size is introduced with stirring. The resulting concrete mixture is placed in metal (pre-lubricated with machine oil) molds and left to solidify. Then the products are removed from the molds and transported to the finished goods warehouse, where they are kept for at least 28 days.

Information sources

1. Patent No. 2083523 of the Russian Federation, С04В 28/04, 1997.

Claims (1)

Concrete mixture containing Portland cement, ash and slag filler, gas-filled plastic chips with particle sizes up to 10 mm, water, characterized in that it further includes GKZh-10 or GKZh-11, superplasticizer S-3, liquid glass in the following ratio of components, wt.% :
Portland cement 23.0-27.0 ash and slag filler 50.0-55.0 gas-filled plastic crumb 0.2-0.3 GKZH-10 or GKZH-11 0.5-0.9 superplasticizer C-3 0.5-0.9 liquid glass 1.0-1.5 water rest