SU619458A1 - Mix for producing concrete by spraying - Google Patents

Description

The invention relates to slag compositions in the living and can be used in industry in the manufacture of sprayed concrete for fastening mine workings.

A known mixture for the manufacture of sprayed concrete, including portland cement, aggregate, a setting retarding agent flj. The mixture has a rather long setting time, which does not allow it to be applied to the wall in a thick: layer.

Of the known mixtures, it is closest to the described technical essence and the achieved effect. with a mixture comprising 20-30% finely. ground blast granulated lard, 7 O-80% aggregate and 0.3-3.0% adipate sodium 2j.

The disadvantage of the mixture is low. Shchyuchnochnye indicators betyuna based on it and slow hardening.

The aim of the invention is to increase the strength and shorten the setting time.

The goal is achieved by the fact that the mixture for the manufacture of sprayed concrete, including thin hammers and granulated blast furnace slag, aggregate and sodium adipate, additionally contains an alkali metal compound at the following ratio of components,% by weight:

Filling 50,0-86,0

 rub o, 1 o, 3

Silkworm compound

metal1.9-5.7

Docked granular dock

fine ground slag

Artificial and natural dispersed soils, sand and granulated blast-furnace slag with a moisture content of 1-9% can be used as a filler of natural moisture. Limes, etc., are used as the alkali metal compound. Sodium adipate is introduced into the dry sprayed concrete mixture with mixing water.

In the manufacture of concrete, a dry mixture consisting of finely ground blast furnace

granulated slag and aggregate (sand or blast furnace slag) was shut off with water with sodium adipate and liquid glass dissolved in it to form a mixture with a draft of a cone 6, cm, after which

molded cubes 7x7x7 cm, which were tested for compression over 28 days solid. deni

The properties of the resulting concrete are shown in the table.

Claims (2)

When storing a dry mixture of slag with a cement for 1 day, the strength of concrete practically does not decrease, while with known mixtures the decrease in concrete strength after 1 day of wounding the mixture reaches 20-8 O%. As a result of the application of the proposed mixture, the lining can be put into operation immediately after its erection, the thickness of the substrate can be increased up to 15О-2ОО mm. DETAILED DESCRIPTION OF THE INVENTION A mixture of day manufacturing of sprayed concrete, including a TONGOLOTBGY domain granulated slag, a filler and sodium adipate, characterized in that, in order to increase the strength and shorten the setting time, it additionally contains an alkali metal compound at the following ratio of components,% by mass: 50%, 0-86.0 Adipate sodium 0.1-0.3 Compound of alkali metal1.9-5.7 Domain granulated finely ground slag Else, Sources of information taken into account during the examination: 1, Author's witness GUSTs USSR № 267429, M.kl. O4 B 7/35, 1968. 2. USSR author's certificate No. 252899, M.kl.S O4 V 7/35, 1967.