SU1475901A1 - Initial composition for producing lightweight concrete - Google Patents

Abstract

The invention relates to the production of building materials, in particular, to lightweight concrete mixtures. It allows to obtain a non-layered concrete mix, to reduce the bulk density and to increase the strength of claydite-concrete. Raw mixture contains, wt%: Portland cement 16.9-18.5

expanded clay aggregate 40.1-43.9

quartz sand 23.2-29.0

a mixture of tar with monoethanolamine 0.04-0.07, water - the rest. The strength of claydite-concrete is 8.0-8.8 MPa, the bulk weight is 1100-1187 mg / m ³ . 1 tab.

Description

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The invention relates to the construction and building materials and can be used in the production of light porous concrete.

The purpose of the invention is to reduce the bulk density and increase the strength of concrete.

Additive - a mixture of tar (waste oil industry in the processing of black cottonseed oil) and monoethanolamine in a ratio of 10: 1 can be prepared directly in the conditions of any combine building materials or concrete products by mixing the starting components in a ratio of 10: 1 under normal conditions.

The composition of the additive,%: waste oil and fat industry in the processing of black cottonseed oil tar 90, monoethanolamine 10. The preparation time of the additive is 1-2 hours, after which

it is diluted with water to obtain a 10-25% solution. The additive is introduced with the mixing water directly into the mixer.

Mixing together (according to generally accepted technology) Portland cement, expanded clay and ordinary construction sand and water, mixes are prepared to produce lightweight concrete. At the same time, a 10% solution of the EG-1 additive is prepared.

The additive is introduced in concentrations of 0.02, 0.04, 0.05, 0.07, 0.10, and 0.15% by weight of the mixture in each composition separately. The control composition is mixed without additives.

After thoroughly mixing all the components of the obtained concrete mixture, cubic samples of 15 x 15 x 15 cm are formed, which are steamed using factory technology and after

I SL

with

steaming test for strength bulk density.

The test results are shown in the table.

As can be seen from the obtained results, the introduction of EG-1 foamer in the claydite-concrete mixture in optimal dosages of 0.04-0.07% by weight of the mixture ensures a low bulk density (reduction by 13-20%) without loss of concrete strength when used in compound of the mixture of ordinary heavy quartz sand instead of scarce expanded clay.

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ten

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formula of the invention Raw mix for lightweight concrete, including cement, clay, aggregate, quartz sand, foaming agent and water, characterized in that, in order to reduce the bulk weight and increase strength, it contains a mixture of tar with monoethanolamine in the ratio 10: 1 in the following ratio, wt.%:

Portland cement 16.9-18.5

Claydite

placeholder 40.1-43.9

Quartz sand 23.2-29.0

Mixture of tar with

monoethanolamine 0.04-0.07

WaterEverything

Claims (1)

The formula of the invention The raw material mixture for producing lightweight concrete, including potassium cement, expanded clay aggregate, quartz sand, foaming agent and water, characterized in that, in order to reduce bulk mass and increase strength, it contains a mixture of tar and monoethanolamine in a ratio of 10: 1 as a foaming agent in the following ratio of components, wt.%: Portland cement 16.9-18.5 Expanded clay aggregate 40.1-43.9 Quartz sand 23.2-29.0 A mixture of tar with monoethanolamine 0.04-0.07 Water Rest Experience The composition of the concrete mix, May,% Volume- Cement Expanded clay Sand Water Additive naya mass, kg / m ³ Compressive strength, MPa Cont role 14.9 35.1 36,4 13.6 1296 7.4 Pre- lag-. my 16.3 38.6 30.8 14,298 0.02 1270 7.9 16.9 40.1 29.0 13.96 0.04 1187 8.5 18.2 44.5 22.7 14.55 0.05 1100 8.8 18.5 43.9 23,2 14.33 0,07 1134 8.0 20.3 48.0 16.9 14.7 0.10 948 7.0 20,2 48.0 16.9 14.75 0.15 948 6.6 Prototype 1200 50