RU2473495C1 - Concrete mixture - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to industry of construction materials, in particular, to production of concrete mixtures for manufacturing products (plates, wall panels), which are to be covered with glaze. Concrete mixture contains, wt %: slag-Portland cement 25-30; crushed to complete passing through mesh No 20 blast furnace slag 40-50, ground to complete passing through mesh No 014 melted quartz 25-30, with water-cement ratio 0.4-0.45.

EFFECT: reduced loss of strength of products, made from concrete mixture during glazing.

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Description

The invention relates to the building materials industry, in particular the production of concrete mixtures for the manufacture of products (plates, wall panels) to be glazed.

Known concrete mixture containing water, slag Portland cement and crushed metallurgical (blast furnace) slag [1]. The loss of strength when glazing products obtained from such a concrete mixture can reach 31.5%.

The objective of the invention is to reduce the loss of strength of products made from concrete mix, with glazing.

The technical result is achieved by the fact that the concrete mixture containing water, slag Portland cement and crushed blast furnace slag further includes ground fused silica in the following ratio of components, wt.%: Slag Portland cement 25-30; crushed before passing through the mesh No. 20 blast furnace slag 40-50; ground fused silica 25-30 before passing through the mesh No. 014, with a water-cement ratio of 0.4-0.45.

The table shows the composition of the concrete mixture.

Components Composition, wt.% one 2 3 Slag Portland Cement thirty 27.5 25 Crushed before passing through the mesh No. 20 blast furnace slag 40 45 fifty Ground fused quartz before passing through mesh No. 014 thirty 27.5 25 Water cement ratio 0.4 0.42 0.45 The loss of strength of products during glazing,% up to 25 up to 25 up to 25

To prepare the concrete mixture, the raw materials are prepared, dosed and mixed: slag Portland cement, crushed before passing through the mesh No. 20 blast furnace slag, ground fused silica before passing through the mesh No. 014. Water is added to the dry components and mixed thoroughly. The mixture is placed in metal (pre-lubricated with machine oil) molds and left to solidify. Then the products are removed from the molds and kept at room temperature for at least 28 days. Then the surface of the products is polished, a suspension of low-melting colored glaze (enamel) is applied (sprayed) onto it, which is fixed by fusion in a screen electric furnace at a temperature of 750-900 ° C for 10-15 minutes.

The source of information

1. A.S. USSR No. 627107, 1978.

Claims (1)

A concrete mixture containing water, slag Portland cement and crushed blast furnace slag, characterized in that it further includes ground fused silica in the following ratio of components, wt.%: Slag Portland cement 25-30; crushed to complete passage through the mesh No. 20 blast furnace slag 40-50; ground fused silica 25-30 before passing through the mesh No. 014 at a water-cement ratio of 0.4-0.45.