SU833736A1 - Method of producing concrete mix - Google Patents

Description

(54) METHOD FOR PREPARING A CONCRETE MIXTURE

one

The invention relates to a technology for the preparation of building mixtures based on cement, in particular, to a method for preparing a concrete mix, and can be applied to the building materials industry.

A known method of preparing a concrete mix, including the introduction of complex additives into the mixing water, followed by

offset with the remaining components 1.

There is a known method of preparing a concrete mix, which includes the activation of the mixing water by the action of an electromagnetic field, followed by displacement with the remaining components 2.

A disadvantage of the known method of preparing a concrete mix is the low strength of concrete.

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

The goal is achieved by the fact that in the method of preparing a concrete mixture, which includes activating the mixing water, with subsequent displacement with the rest of the components, water is activated by mechanical treatment in a rotor mill at a rotor speed of 50-120 m / s. During mechanical shock treatment of mixing water due to the pulsed contact of water with the surface of a solid rotating impactor, a hydraulic shock is generated, creating high pressure pulses and intense shear deformations in the water being treated, which breaks the chemical bonds of molecular structures and destruction.

0 molecules, the formation of active centers: ions, free radicals, hydroxyl, hydrated electrons, increasing the chemical activity of the mixing water, providing a sharp increase in the intensity of the strength of the mixture

5 in the early stages of hardening due to an increase in the rate of hydration and hydrolysis of particles in the adhering materials.

Example. The mixing water is subjected to a pulsed mechanical shock treatment for 1 min during its collision with a frequency of 300 beats per second with solid impacting elements rotating at a speed of 50 m / s, then the activated water is fed into the mixer together with the other raw materials, mixed them, molded Samples are subjected to their thermal and moisture treatment and strength tests. The temperature of the mixing water of the concrete after its activation according to the proposed procedure during 1 minute is 21-23 ° C, and by the known method it is 105-110 ° C. The table shows the comparative characteristics of the tested concretes. The proposed method allows to increase the intensity of the increase in strength.

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Claims (1)

Invention Formula A method of preparing a concrete mix, which includes the activation of mixing water, followed by mixing with the other components, characterized in that, in order to increase the strength of concrete, water is activated by mechanical treatment 229,255 3.5 in a rotary mill with a rotor speed of 50-120 m / s. Sources of information taken into account in the examination 1 USSR author's certificate No. 258903, cl. From 04 To 13/22, 1970. 2 USSR author's certificate No. 285570, cl. From 04 B 15/00, 1970. mixes in the early stages of hardening from 7 to 11%, significantly improve the technical and economic indicators of concrete production by increasing the productivity of factories associated with shortening the time of moisture and humidity treatment of products and increasing the turnover of forms. In addition, this method allows to reduce the energy costs of enterprises for the thermal and moisture treatment of products or to reduce cement consumption by 5–8%, while maintaining the required technical conditions for the products.