SU1421720A1 - Concrete mix composition - Google Patents

Abstract

The invention relates to compositions of concrete mixtures and can be used in the manufacture of building materials for the production of predominantly wall products. The concrete mixture contains, mA.h .: cement 1, slag for burning lump coal in fluidized bed furnaces with a density of 1000–1300 kg / m 2–5, ash – slag mixture with a bulk density of 650–850 kg / m from coal combustion in pulverized conditions in furnaces with solid slag removal 1.1-1.15, water 1-1.1. The density of concrete is 1540–1615 kg / m, the coefficient of thermal conductivity is 0.30–0.41 W / mK. 3 tab. with

Description

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The invention relates to the composition of concrete mixtures and can be used in the industrial construction materials for the production of pre-guschestvenno wall products.

The aim of the invention is to reduce the density and thermal diffusivity of concrete.

The concrete mixture allows to utilize the slags of the crystal structure from the combustion of low-grade lumpy coal in the fluidized bed furnaces. This slag has a porous structure and a lower density. A light ash-slag mixture is used as a fine aggregate in the proposed concrete mix.

The results of chemical analysis of slags of the crystal structure from burning lump coal in the fluidized bed furnaces show that the main components of them are SiOj, and the content of other compounds is insignificant,

The chemical composition of the slag of the structural structure of coal combustion in the fluidized bed furnaces is as follows, wt. X A1gOz 22-25; Fe, 0з 12-16j5 | CaO 1.9-3, L; MgO 1-2; SO, 0.5-1; C.R. 12.4-4.2; ppt, the rest.

The grain composition of the slag is given in table. one,

Concrete from the proposed mixture is characterized by frost resistance and a lower coefficient of heat conductivity. Concrete production with such properties is provided by the porous structure of a large aggregate, its lower density compared to slag, used as a fine aggregate of a light ash ash mixture, a more rational combination of constituent materials revealing the advantages of the proposed technical solution, comparative tests of the proposed and known concrete mixtures were carried out.

In the comparative experiments, slag of crystalline structure from burning lump coal in fluidized bed furnaces slag from burning pulverized coal ash-yiioc and a light ash mixture are used as aggregates.

The compositions of the prepared concrete mixtures are given in Table 2

The mixtures are prepared using standard technology using standard equipment.

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After preparing the concrete mixes, samples are made for strength, frost resistance, thermal conductivity tests, as well as for determining the density of concrete in a dry state.

Samples were tested according to existing procedures.

The test results are given in the table.

The data given in the table below show the advantages of the concrete mix offered in comparison with the known.

The proposed concrete mixture makes it possible to use in considerable volumes the slag of the crystal structure from the combustion of low-grade lump coal in the fluidized bed furnaces in combination with the light ash powder mixture from the combustion of coal in a pulverized state in solid-fired furnaces.

Claims (1)

Formula from-found Concrete mixture comprising cement, coarse aggregate, fine aggregate and water, characterized in that, in order to reduce the density and thermal conductivity, it contains slag from large coal in furnaces of the fluidized bed with a density of 1000-1300 kg / m as a large aggregate and as a fine aggregate, ash and slag mixture with a density of 650-850 kg / m from coal combustion in a pulverized state in furnaces with solid slag removal in the following ratio of components, masoCho. Cement1 P1pak from zhktaii lump coal in boiling furnaces layer density 1000-1300 kg / m 4.2-5 Zoloshlakova mix with bulk density 650-850 Kf / M from burning coal pulverized in furnaces with solid slag removal1, 1-155 Water1.0-1.1 Table 1 Cement Large aggregate slag crystal structure from burning lump coal in fluidized bed furnaces Fine aggregate-light ash-slag mixture from coal combustion in pulverulent state Large slag aggregate Slag sand. Fly ash of thermal power plants -, - - 5,61,8 Water1.1 1.05 1.0 2.7 0.9 4.8 0.65 10.6 2.8 Compressive Strength Sha Frost resistance, cycles Heat conductivity coefficient D, W / m.K Dry Density kg / m Editor H, Gunko Compiled About Motorika Tehred.MorgentalKorrektor V. But ha Order 4386/23 Circulation 594 VNIIPI USSR State Committee for inventions and discoveries. . 113035, Moscow, Zh-35, Raushsk nab. 4/5 Table3 22.5 5.312.7 1502550 0.41 0.460.53 J 1615 17201730 Subscription