RU2465251C1 - Crude mixture for making foamed concrete - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of construction materials and specifically to production of foamed concrete used in low-height construction. The mixture for making foamed concrete contains the following, wt %: portland cement 29.0-31.0; foaming agent PB-2000 0.4-0,5; thermal power plant ash 27.0-31.1; water 38.0-40.0; superplasticiser S-3 0.6-0.9; caprone thread cut to 10-50 mm pieces 0.6-0.9.

EFFECT: high strength of articles made from the foamed concrete.

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Description

The invention relates to the construction materials industry, in particular to the production of cellular concrete used in low-rise construction.

A known mixture for the manufacture of cellular concrete (foam concrete), including, wt.%: Cement (Portland cement) 30-31; a foaming agent 0.15-0.25; water 33-34; ash TPP - the rest [1].

The objective of the invention is to increase the strength of foam concrete products.

The technical result is achieved by the fact that the raw material mixture for the production of foam concrete, including Portland cement, foaming agent, TPP ash and water, additionally contains C-3 superplasticizer and filament capron thread cut into 10-50 mm sections, and PB-2000 as a foaming agent, the following ratio of components, wt.%: Portland cement 29.0-31.0; PB-2000 foaming agent 0.4-0.5; ash TPP 27.0-31.1; water 38.0-40.0; superplasticizer C-3 0.6-0.9; cut into segments of 10-50 mm filament kapron thread 0.6-0.9.

The composition of the raw mix is shown in the table.

Table Components Content, wt.%: Composition No. 1 Composition No. 2 Composition No. 3 Portland cement 29.0 30,0 31,0 Frother PB-2000 0.4 0.45 0.5 Ash TPP 31.1 29.05 27.0 Water 38,0 39.0 40,0 Superplasticizer S-3 0.6 0.75 0.9 Filament nylon thread 0.9 0.75 0.6 The compressive strength of foam concrete, MPa ~ 3 ~ 3 ~ 3

To prepare the raw material mixture for the production of foam concrete, the following raw materials are prepared and dosed: Portland cement, PB-2000 foaming agent (corresponding to the requirements of TU 2481-185-05744685-01, density 1000-1200 kg / m ³ , pH 7-10, foam ratio of working solution with volume fraction of foaming agent 4%, foam stability of at least 360 s) in this example, density 1200 kg / m ³ , pH 7, water, TPP ash (with specific surface area 2800-5000 cm ² / g) in this example 3000 cm ² / g, superplasticizer S-3 (corresponding to the requirements of TU 254-1298281-031-90, which is a mixture of it polymeric compounds of different relative molecular masses obtained by condensation of sodium hydroxide obtained by condensation of naphthalene sulfonic acids with formaldehyde and technical lignosulfonates), filament capron filament cut into segments of 10-50 mm.

In the foam generator, foam is whipped from the mixture of the foaming agent with water. Mixing of all concrete components takes place in a screw mixer, into which dry components are first fed: Portland cement and TPP ash, and then the prepared foam, S-3 superplasticizer and finally filament capron filament cut into sections of 10-50 mm. From the mixer, the prepared mixture is evenly distributed over the area of metal forms pre-oiled with oil and fed to the heat-moisture treatment, which is carried out according to the regime of 3 + 9 + 3 hours at an isothermal holding temperature of 90 ° C. Then the finished product is removed from the molds and transported to the warehouse.

Information sources

1. Autosvid. No. 1244124 of the USSR, С04В 28/02, 1986.

Claims (1)

The raw material mixture for the production of foam concrete, including Portland cement, foaming agent, TPP ash and water, characterized in that it additionally contains C-3 superplasticizer and filament capron thread cut into 10-50 mm sections, and PB-2000 as a foaming agent in the following ratio of components , wt.%:
Portland cement 29.0-31.0 PB-2000 foaming agent 0.4-0.5 ash TPP 27.0-31.1 water 38.0-40.0 superplasticizer C-3 0.6-0.9 cut into pieces 10-50 mm filament nylon thread 0.6-0.9