SU814927A1 - Concrete mix - Google Patents

Description

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The invention relates to concrete mixes containing chemical additives based on chlorides, and can be used for concreting under conditions of negative temperatures in contact with permafrost soils and erecting monolithic structures in winter conditions.

A concrete mixture is known using ferric chloride fl as an additive.

The known concrete mixture does not provide the necessary strength and water resistance to concrete in its early periods of hardening.

Closest to the proposed technical essence and the achieved result is a concrete mix, including cement, aggregate, water and an additive based on metal chlorides. The additive, which has the trade name Tricosal SS, is introduced into the concrete mix in the amount of 5% by weight of cement and has the following composition, wt.%:

Calcium chloride 81.2 Iron chloride 0.9 Aluminum chloride 14.7 Sol hydrochloric acid 3.2

The disadvantage of the mixture is that it does not sufficiently increase the density and strength of concrete in the early stages of its hardening.

The purpose of the invention is to improve the strength and impermeability of concrete in the early stages of hardening.

The goal is achieved by the fact that the concrete glass, including the cement, aggregate, water and an additive based on metal chlorides, contains as an additive the spent solution of printed circuit boards in the following ratio of components, wt.%:

5 Cement13-19

Filler 61-85 Processed PCB Solution (in terms of

0 dry residue) 0.2-1 Water Else

The spent solution of printed circuit boards has the following composition, wt.%: Ferric chloride 1-1.5

5 Iron chloride 8-1.3 Chlorne copper 12-15 Sol per acid 1-1.5 water 70-75

The solution is a mobile non-separable liquid with a specific weight of 1.2-1.5 g / cm3 and is introduced into the concrete mix with mixing water.

The presence of hydrochloric acid and iron chloride in addition creates favorable conditions for the initial stages of the hydration process.

cement, which leads to an increase in the rate of hardening of concrete. Ferric chloride and copper chloride also help accelerate the curing of concrete, compacting it.

Approximate compositions of the concrete mix and their properties are given in the table.

Claims (2)

Claim 13-19 Placeholder Spent 61-85 35 solution of printed circuit boards, in terms of dry current) 0.2-1 Water Rest 40 2. The mixture according to claim 1, distinguish- u and i with the fact that spent roast 1. Concrete mixture, including cement, aggregate, water and an additive based on metal chlorides, characterized in that, in order to increase the strength and water tightness of concrete in the early stages of hardening, it contains an used solution of printed circuit boards as an additive in the following ratio components, wt.%: thief of printed circuit boards has the following composition, wt.%: Ferric chloride 1-1.5 Iron chloride S-13 45 Chlorine Copper 12-15 Hydrochloric acid 1-1.5 Water 70-75 Sources of information, taken into account upon examination 1. Grukhin IV. Sand concrete with the addition of ferric chloride. Transport construction, 1967, ”6, p. 52. 2. Wavrzhin. F., Krchma R. Chemical additives in construction. M., Stroyizdat, 1964, p. 18-20.