RU2504524C1 - Mixture for making artificial building stone - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of building materials, specifically to compositions of crude mixtures for making building articles, and can be used in production artificial building stone by pressing. The technical result is achieved owing to that 5% acrylic acid solution is used as the modifier of screenings from crushing carbonate rocks. The mixture for making artificial building stone consists of screenings from crushing carbonate rocks, portland cement and water. According to the invention, at least 15 minutes before preparation, the screenings from crushing carbonate rocks are treated with 5% acrylic acid, followed by addition of portland cement and water, with the following ratio of components, wt %: portland cement 20-30, screenings from crushing carbonate rocks 70-80, said modifier solution 13±1 of the mass of screenings from crushing carbonate rocks, water 13±1 of the mass of portland cement.

EFFECT: high strength of the artificial building stone with low cement consumption.

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Description

The invention relates to the building materials industry and can be used in the production of artificial building stone by pressing.

A known method of producing artificial pressed stone by the method of preparing a raw material mixture based on Portland cement, modified screenings for crushing carbonate rocks - ODKP and water in the following ratio of components, wt.%:

Portland cement - 20-50;

Screenings for crushing carbonate rocks - 50-80;

1-3% aqueous solution of hydrofluoric acid - 12 from ODKP;

Water - 12 from Portland cement [1].

A disadvantage of the known solution is the increased consumption of cement.

The technical result is an increase in strength with reduced cement consumption.

The technical result is achieved due to the fact that as a solution modifier screening crushing carbonate rocks used 5% solution of acrylic acid. The mixture for producing artificial building stone consists of screening crushing carbonate rocks - ODKP, Portland cement and water. According to the invention, ODKP no earlier than 15 minutes before cooking it is treated with a 5% solution of acrylic acid, followed by the addition of Portland cement and water in the following ratio of components, wt.%

Portland cement - 20-30

ODKP - 70-80

The specified modifier solution is 13 ± 1 by weight of the ODKP

Water - 13 ± 1 by weight of Portland cement.

The resulting mixture is mixed until smooth.

No. of composition p / p P / cement,% dry mix ODKP,% dry mix The concentration of an aqueous solution of acrylic acid,% The content of the aqueous solution,% of ODKP The content of water,% of p / cement Compressive strength, after 28 days, MPa one twenty 80 0 13 13 16.5 2 twenty 80 5 13 13 27,2 3 twenty 80 10 13 13 28 four twenty 80 fifteen 13 13 28.1 5 thirty 70 0 13 13 25.8 6 thirty 70 5 13 13 33.9 7 thirty 70 10 13 13 34.2 8 thirty 70 fifteen 13 13 34.3

Compared with the known technical solution, the present invention has the advantage that the strength of the artificial building stone increases with reduced cement consumption. The use of screenings for crushing carbonate rocks contributes to the integrated use of natural mineral resources.

Literature

1. Pat.2386532 Russian Federation, IPC В28В 3/00. A method of obtaining an artificial building stone / Kononova O.V., Cherepov V.D., Soldatova E.A., Martyushina E.K., Vedernikova O.V .; applicant and patent holder GOU VPO MargTU. - No. 2008148466/03; declared 12/08/08; publ. 04/20/10.

Claims (1)

A mixture for the production of artificial building stone, consisting of screening crushing of carbonate rocks - ODKP, Portland cement and water, characterized in that the ODKP is processed not earlier than 15 minutes before preparation with a 5% solution of acrylic acid, followed by the addition of Portland cement and water in the following ratio components, wt.%:
Portland cement 20-30 ODKP 70-80 Specified Modifier Solution 13 ± 1 by weight of ODKP Water 13 ± 1 by weight of Portland cement