RU2484064C1 - Raw mixture for manufacture of aerated concrete - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: raw material mixture for manufacture of aerated concrete contains the following components, wt %: portland cement 30.0 - 33.0, foaming agent PB-2000 0.4 - 0.6, glass fibre ground into sections 5 - 50 mm 28.0 - 34.0, water 35.0 - 38.0. The mixture additionally may contain sodium ethyl siliconate and/or sodium methyl siliconate in amount of 0.4 - 0.6.

EFFECT: strengthening of products from aerated concrete.

2 cl, 1 tbl

Description

The invention relates to the building materials industry, in particular to the production of cellular concrete.

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 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, water, contains PB-2000 as foaming and additionally fiberglass shredded into segments of 5-50 mm in the following ratio of components, wt.%; Portland cement 30.0-33.0; PB-2000 0.4-0.6; fiberglass crushed into segments of 5-50 mm 28.0-34.0; water 35.0-38.0. The raw material mixture for the manufacture of foam concrete additionally contains sodium ethylsiliconate and / or sodium methylsiliconate 0.4-0.6.

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

Components Content, wt.%: Composition No. 1 Composition No. 2 Composition No. 3 Composition No. 4 Structure
Number 5 Portland cement 30,0 31.5 33.0 30.6 33.0 Frother PB-2000 0.4 0.5 0.6 0.4 0.6 Glass fiber shredded into pieces of 5-50 mm 34.0 31,0 28.0 34.0 28,4 Water 35.0 36.5 38,0 35.0 38,0 Ethyl Siliconate Sodium 0.6 0.25 - - - Sodium methylsiliconate - 0.25 0.4 - - The compressive strength of foam concrete, MPa (at the age of 7 days) ~ 3 ~ 3 ~ 3 ~ 3 ~ 3

In the composition of the raw material mixture for the production of foam concrete, a PB-2000 foaming agent is used that meets the requirements of TU 2481-185-05744685-01, with a density of 1000-1200 kg / m ³ , pH 7-10, the multiplicity of the working solution foam with a volume fraction of foaming agent of 4%, stability foam at least 360 s.

To prepare the raw material mixture for the production of foam concrete, raw materials are prepared and dosed. In the foam generator, foam is whipped from the mixture of the foaming agent with water. The mixing of all the concrete components takes place in a screw mixer, into which the dry components are first fed: Portland cement and glass fiber crushed into pieces of 5-50 mm, and then the prepared foam and sodium ethylsiliconate and / or sodium methylsiliconate. 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.

The source of information

1. A.S. No. 1244124 of the USSR, C04B 28/02, 1986.

Claims (2)

1. The raw material mixture for the manufacture of foam concrete, including Portland cement, a foaming agent, water, characterized in that it contains as a foaming agent PB-2000 and additionally chopped into pieces of 5-50 mm fiberglass in the following ratio of components, wt.%:
Portland cement 30.0-33.0 PB-2000 0.4-0.6 fiberglass crushed into pieces 5-50 mm 28.0-34.0 water 35.0-38.0 2. The raw material mixture for the manufacture of foam according to claim 1, characterized in that it further comprises sodium ethylsiliconate and / or sodium methylsiliconate 0.4-0.6 wt.%.