SU717002A1 - Raw mixture for producing cellular concrete - Google Patents

Description

I

The invention can be used to produce durable hydrophobic cellular concrete.

The known mass for the preparation of cellular concrete, including lime, a blowing agent, waste mineral processing and loess 11).

The known mass does not allow for the production of durable hydrophobic concrete.

Closest to what is described is the raw mix for the preparation of cellular concrete 21, having the following composition, wt.%:

Lime 30-40

Ground sand 25-50

Expanded perlite

sand20-35

Aluminum Powder0.2-0.5

A mixture of such a composition does not provide for obtaining durable waterproof concrete with a minimum period of hydrothermal treatment of products.

The aim of the invention is to increase the strength, water resistance and reduce the time of hydrothermal processing of concrete.

This is achieved by the fact that the raw mix for the preparation of cellular concrete, including lime, ground sand, porous filler and aluminum powder, additionally contains rosin, fatty acids, caustic soda, sodium chloride and caustic sodium or potassium in the following ratio of components, wt.%:

Lime 30-40

Porous material 20-25

Aluminum powder 0,2-0,5

RosinI -2

Fatty acids 0.2-2.5

Caustic soda0.3-0.8

Cooking salt2-4

Caustic Sodium or Potassium0,1-0,2

Ground sandEverything else

For the preparation of the raw mix, podmyl lye of the soap production of the fat plant was used. Podmilen1p 1st liquor has the following composition, weight .:

..-., -

717 (

Y-1 Y: S1g,

0.50-5.30 0.65-1.30 5.00-9, 0.15 -, 35 potassium Balance to TSO

In tab. 1 npHBefteWir formulations of raw mixes for preparing cellular concrete.

Aerated concrete is prepared from a raw material mixture consisting dT Jouy ETO obtained sjpeayhbtatGTybmolav ball K1elnitse 1nzvesti-Kirovskiy Yu Dalkey and lg fiftegbro sand which is mixed with b vibrosmeeitele expanded perlite sand, aluminum powder, rosin, podmshnym hydroxide solution and water, wherein the content Nahbdits in the range of 90-130% (taking into account the water content in the submilk liquor) from 6 dry materials. On

Before preparing a mixture of rosin

Firifo e ifteiwM lffliBaHHjt raslav with aluminum powder obtained mass oHlad- 20 give and grind. The reheated mixture is poured into, where it expands, maintained and subjected to an autoclave with a hydrothermal treatment for 4 hours. In the first stage of solidification and formation of ME25

Structures by benv the reaction come in kash-fosTK and caustic soda with the formation of foam, gzatbm otkryt ′ particles of aluminum, which begins to interact with the liquid phase. Due to this, a single yr of 1-6 is fixed - 30

The defects in the structure of the concrete are matched and compacted beyond the concrete structure as a result of a delayed gas gap. Thus, concrete acquires a finely porous structure and increased strength.

The introduction of rosin, fatty acids, caustic soda, cooked cortH, and caustic sodium or potassium into the raw mix gives a significant economic effect due to the reduction of hydrothermal treatment from 12 to 4 hours, which contributes to an increase in the productivity of enterprises and a decrease in the cost of products.

The results of concrete tests obtained from the known and proposed raw mixes for preparing cellular concrete are given in Table. 2

From the table it can be seen that the use of aluminum powders with stable properties and podmyl lye in the manufacture of cellular betbM allows you to improve the shape of the microstructure of porous betbna and to obtain hydrophobic cellular concrete with a minimum term of hydrothermal treatment. .

Domestic hydrophobic cellular concrete. Concrete can be used for the manufacture of heat insulation of pipelines, equipment and building structures of industrial and civil buildings and structures.

Table

Claims (1)

Claims The raw mix for the preparation of aerated concrete 25, including lime, ground sand, porous filler and aluminum powder, characterized in that, in order to increase strength, water resistance and reduce the time of hydrothermal treatment, it additionally contains rosin, fatty acids, caustic soda, sodium chloride, and sodium hydroxide or potassium in the following ratio, wt.%: Lime 30-4035 Porous Filler 20-25 Aluminum powder 0.2-0.5. Rosin 1-2 Fatty acids 0.2-2.5 Caustic soda. 0.3-0.8 Salt 2-4 Caustic Sodium and Potassium 0.1-0.2 Ground Sand Else.