SU652141A1 - Concrete mix composition - Google Patents

Description

(54) CONCRETE MIXTURE

The invention relates to construction materials, namely to concrete, which has special properties. A known concrete mixture, including finely ground granulated cement slag, lime and soil 1. The disadvantage of it is CoC strength. Also known is a fireproof concrete mixture, including 28-30 wt.% Fine ground granulated slag, 65-75 wt.% Slag aggregate, and 2-2.5 wt.% Caustic soda 2. The purpose of the invention is to increase the strength, density and concrete. This is achieved by offering. A hyae concrete mix, including finely ground granulated blast furnace slag, caustic soda or sodium metasilicate and aggregate, contains S as aggregate, crushed stone from welding slag at the following components, wt.%: Caustic soda or metasilicate 1.4-3.5 crushed stone from welding slag 78.9-82.8 Refined granulated blast-furnace slag Else Welding slag g formed in heating wells during heating of steel ingots before rolling, causes 70-95% iron oxides and differs in higher strength characteristics Kami (crushability in the cylinder when tested on 8269-64 7-10%). Its density is 5100 5300 kg / m. High strength and abrasion of welding slag are maintained up to 900-1000 ° C. To obtain a filler, welding slag is crushed to a particle size of 0-40 mm. The concrete proposed in comparison with the known composition is characterized by higher physicomechanical properties. The compositions of the proposed concrete mix are presented in table 1.

652141

Component

Crushed stone from welding slag (fraction 0-40)

Domain granulated slag (specific surface 4200-4500 cmE / g)

Alkaline additive - sodium metasilicate

C. Lac sodium can be used as an alkaline additive instead of sodium metasilicate.

When used as an alkaline 20 component of caustic soda, the strength of steamed samples is reduced by 10–12%, the strength of the samples after

60-85 70-80 80-90 3800-3900 0.59 600

80-90 80-90 95-105 3800-4000 0.57 600

100-110 100-120 115-120 3800-4000 0.48 600

COOT- 52.4 64.5 2140 - BOO vet-

whine

brand 500

As can be seen from tarl.2, the proposed concrete as compared to the known one has a higher compressive strength and can be used at temperatures up to. This concrete can be used to build floors for industrial buildings, lining chutes, bunkers and other special purpose objects.

The technology for preparing concrete from the proposed mixture does not differ from the usual one. Under the conditions of metallurgical enterprises, concretes based on welding slag can be used.

Content, wt.%

82.8 80.9 78.9

15.8 16.7.6

1.4 2.4 3.5

28 days of normal storage increases by 15-20%, the residual strength of concrete increases by 5-10%. . ,

The resulting concretes have the following physico-mechanical parameters presented in table 2.

table 2

Claims (2)

They are used for coke ramp devices, lining of coke sorters, bunkers and charging devices of blast furnaces, as well as for covering floors in hot shops. At the same time, a significant amount of expensive materials is released: cast iron and stone casting tiles used for covering coke ramps and chutes, heat resistant brick and aluminous cement, steel slabs for flooring in rolling shops. Labor productivity is increased due to the mechanization of the laying of concrete and precast concrete products as compared with the single-piece laying of facing tiles, and the conditions for the repair and maintenance of the said workshops are improved. Claims Concrete mixture comprising finely ground granulated blast furnace slag caustic soda or sodium metasilicate and aggregate, characterized in that, in order to increase the strength of density and wear resistance, it contains aggregate of crushed slag as a filler in the following ratio of components, wt.%: Caustic soda or metasilicate sodium 1 g 4 Crushed stone from welding slag 78.9 - 82.8 Fine ground granulated blast furnace slag Else. Sources of information taken into account during the examination 1. USSR author's certificate No. 321508, cl. From 04 To 31/20, 1969. 2. USSR author's certificate No. 502855, cl. From 04 To 23/00, 1974.