SU719982A1 - Cellular concrete mixture - Google Patents

Description

one

. The invention relates to the building materials industry and can be used in the manufacture of autoclaved silicate materials.

A well-known cellular mixture comprising a mineral sticking, silica component, a porous agent, water, and an additive for soaping and caustic soda 1.

However, based on the known composition, it is impossible to obtain a mixture with sufficient plasticizing properties. and improved physical and mechanical characteristics.

Of the concrete mixes described in the literature, the composition of the ingredients is closest to the proposed mixture, including, wt.%: In the slant 28-33

Sand29 30

Aluminum powder0.05 - 0.10

Sodium hydroxide. , 0.5-1.5

Carboxymethylcellulose:

lylose 0.05 - 0.15 2.

This mixture is characterized by an accelerated increase in plastic strength and hardening in the initial stage of autoclaving;

But on the basis of the known Composition, it is impossible to obtain a material with a low humidity after autoclave treatment at high physical and mechanical parameters.

The purpose of the invention is to reduce the moisture content of the aerated concrete after autoclaving and increase the productivity.

To achieve this goal, the proposed concrete mixture, comprising

- -. - „.-F .. - ---: - --- f- i ,, -. Yei: -X: ..:. . ....-.--, -. - - ..,

the silica component, the former, the water and the additive, contain as an additive the product of neutralizing acidic tar with caustic seed at the following ratio of components, wt%:

Really24-25

Siliceous

component39-40

Blowing agent 0.06-0.08

Additive1-5

Water the rest.

Caustic soda neutralizes benzosulfonic acid and sulfuric acid residues contained in tar. Like tar, as well as its neutralization product, it is well soluble in water.

The amount of mixing water with pre-f mixture mixtures is selected by the method. comparing the fluidity of the mixture (according to Suttard) with the additive and the mixture without the additive.

Increasing the content of the additive in the mixture leads to an even greater effect, but it is not desirable that the gas evolution process becomes unstable over time, and the surfactants contained in the additive adsorbing on the surface of the cement and sand particles can interfere with the hydration of the cement grains in waiter ..

The addition of tar neutralization product is introduced into the cellular concrete mixture at the stage of its formation. Due to its plasticizer

This significantly reduces the mixing water consumption.

For the preparation of aerated concrete without additives, wt.% Are used:

Cement 24,5

Sand40.0

Aluminum Powder0.06

Water 35.44.

When baking, the additive of the neutralization product in a mixture of 1, 3 and 5% of the mixing water consumption is 37.44; 32.44 and 30.44 p.

Cellular concrete mixture after autoclave treatment without additives and with its different content have the following characteristics (see table.).

Claims (1)

SUMMARY OF THE INVENTION A barley-concrete mixture comprising a binder, silica component, a blowing agent, water and an additive, characterized in that, in order to reduce the moisture of the mixture after autoclaving and to increase strength, it contains as an additive the product of neutralization of acid tar with caustic soda during the following ratio of components, wt.%: Astringent 24-25 Silica component 39-40 Pore former 0.06-0.08 Additive 1-5 Water Else