SU1070129A1 - Raw mix for making cellular concrete - Google Patents

Abstract

RAW MIXTURE FOR THE PRODUCTION OF CELLULAR CONCRETE, including Portland cement, gypsum, aluminum powder, alkyl sulfate, coal ash, and water, in order to reduce the bulk density and increase the strength of concrete, the structure is placed on the structure and the body is placed on the structure and the body is placed on the structure and the structure is applied. components, wt.%: Portland cement 20-30 Gypsum1-3 Aluminum powder 0.2-0.25 Alkyl sulfate 0.2-0.3 Coal ash25-35 Lime 1.5-4 Carboxymethylcellulose. 0.04-0.15 Polyvinyl acetate emulsion. 2-8 Water. The Rest

Description

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CO The invention relates to building materials and can be used for the manufacture of heat-insulating products from cellular concrete. The known raw mix for the manufacture of cellular concrete, including,%: Portland cement 28-33, fine ground sand 29-30, - aluminum alum powder 0.05-0.1, caustic soda 0.5 1.5; carboxymethylcellulose 0.050, 15 and water 37.4-40.25 ij. A known raw material mixture for the manufacture of cellular concrete, comprising,%: Portland cement 25-45; Hyp 3-9, - aluminum powder 0.1-0.3; sodium chloride 1-1.5; O alkyl sulfate, 1–0.4 J coal ash, the rest and water to technical humidity C23. The disadvantages of the known mixtures are the high bulk density and the reduced strength of the concrete. The purpose of the invention is to reduce the bulk and increase the strength of concrete. The goal is achieved by the fact that the raw mix for the manufacture of cellular concrete, including Portland cement, gypsum, aluminum powder, alkyl sulfate, coal ash, and water, additionally contains lime, carboxymethylcellulose, and polyvinyl acetal emulsion in the following ratio of components,% by weight: Portland cement 20-30% 30-30% of Portland cement, and in the following ratio, wt. -3 Aluminum powder 0,2-0,25 Alkyl sulfate O, 2-0, 3 Coal Zola25-35 Lime1,5-4 Carboxymethylcellulose0, 04-0,15 Polyvinyl acetate emulsion 2-8 Water Else Incorporation of coal ash into raw mix with A high specific surface area (6000–8000) in combination with the complex additive in the form of a mixture of alkyl sulfate, carboxymethyl cellulose, and polyvinyl acetate emulsion helps to achieve a high degree of porosity of the mixture by creating optimal gas (aluminum powder) and foam (alkyl sulfate) porosity conditions and increasing the stability of the highly porous mixture on stages of formation of the structure of the material. At the same time, the combined presence of polyvinyl acetate (PVA) and carboxymethylcellulose (CMC) with high dispersion of ash and these mineral components allows to obtain increased elasticity and strength of interpore partitions (membranes) of cellular concrete at low values and x bulk density. For the production of concrete, three mixtures were prepared by mixing and frothing in a turbulent mixer. Of. The mixtures are molded into slabs with a size of 100-400-600 mm, which are steamed at 100 ° C in 3 + 6 + 3 h mode and then cyiJKe at up to constant weight. Cubes of IO-10IO cm and prisms 10-10-40 cm are cut out from the slabs to determine the character of the sources of cellular concrete. mixtures and their physico-mechanical characteristics are given in the table.

Ҥ The squeegee is compressive strength, in bending. denominator - to stretch at. 310701294

As can be seen from the table, the thermal insulation reduction of the bulk mass — the thermal cellular concrete from the proposed protective ability of the thermal insulation mixture is characterized by more than one slab.

high strength and smaller mini- calculations show that saving

maximum bulk weight than concrete production and use of 1 m3

from a known mixture of heat-insulating products with bulk

Improved durability — weighing 150–200 kg / m from the proposed and deformability of the cellular concrete mix compared to products

does not allow to increase / transportable - with a volume weight of 300-350 kg / m from

The performance and performance of a known mixture is 1.7 p.

Claims (1)

RAW MIXTURE FOR PREPARATION OF CELLULAR CONCRETE, including Portland cement, gypsum, aluminum powder, alkyl sulfate, coal ash and water, characterized in that, in order to reduce bulk density and increase the strength of concrete, it additionally contains lime, carboxymethyl cellulose acetate and components, wt.%: Portland cement 20-30 Gypsum 1-3 Aluminum powder 0.2-0.25 Alkyl sulfate Coal 0.2-0.3 ash 25-35 Carboxymethyl Lime 1,5-4 cellulose 0.04-0.15 Polyvinyl acetate 2-8 emulsion Water Rest ω s s * n * u with