SU833724A1 - Complex additive to concrete mix - Google Patents

Description

(54) COMPLEX ADDITIVE FOR CONCRETE MIX

I

This invention relates to building materials, namely, additive compositions for concrete mixtures.

Known additive 1 for concrete mix, including, weight%:

Bitumen 20-40

 Caustic soda

Distillation residues

crude benzene 3-10

VodiOstalnoe

Closest to the proposed technical essence and the achieved result is an additive for the concrete mix, which includes the product of neutralizing the acidic tar of the rectification of raw benzene with caustic soda in the amount of 0.25-1.25% by weight of the binder 2.

Known additive does not provide sufficient strength of concrete.

The purpose of the invention is to increase the strength of concrete.

This goal is achieved by the fact that the complex additive for concrete mix, including acidic (to the milk of rectification of raw benzene, contains additionally lye at the following ratio of components, wt.%:

Acid tar tar rectification of crude benzene35-45

Underground lye55-65

The acid tar of the rectification of raw benzene is a waste from the coke-chemical production and contains sulphonic acids, polymers and unsaturated hydrocarbons.

Podmylny lye — waste from the production of synthetic detergents — contains caustic soda, sodium chloride, and molecular fatty acids.

Examples of the composition of the additive are given in table 1.

Table 115

Sour resin rectification raw

35 42.5 45 benzene

Underground lye 65 57,5 55

Comparative physics and mechanical indicators of the proposed and known additives are given in table. 2

table 2

Note. The additive is introduced into cement-sand solutions of the composition of cement: sand 1: 2, w / c 0.5) in the amount of 1.5% by weight of cement. Thermo-moisture treatment is carried out according to the mode 2 + 5 + 3 h with a maximum isothermal temperature of 90-95 ° C and a limit exposure of 24.

The invention can be used to increase the strength and mobility of mortars and concretes or to save money.

The proposed complex additive to the concrete mix does not require additional costs and makes it possible to use waste that pollutes the environment.

Claims (2)

Invention Formula A complex additive for a concrete mix, including the acid tar of crude benzene rectification, characterized in that, in order to increase the strength of concrete, it additionally contains lye in the following ratio of components, wt.%: Sour tar rectification crude benzene35-45 Underground lye55-65 Sources of information taken into account in the examination 1 USSR Author's Certificate No. 643456, cl. From 04 To 13/24, 1977. 2. USSR author's certificate in application number 2539186 / 29-33, cl. From 04 To 13/24, 10/24/77.