RU2160242C2 - Method of complex activation of mixing water - Google Patents

Abstract

FIELD: construction engineering; methods of activation of binding agents and components of concrete mixes. SUBSTANCE: proposed method includes activation of mixing water by high-voltage discharges arising between electrode pairs, introducing chemical antifreeze additive and stirring this mixture with components of concrete mix; activation is effected through treatment of mixing water, after which it is mixed with chemical antifreeze additive. EFFECT: avoidance of use of additional complex equipment; low cost of method. 1 dwg

Description

 The invention relates to construction, to methods for activating a binder and components and prepared concrete and mortar mixtures.

 A known method of activating a hardening concrete mixture, comprising mixing mixing water and a chemical additive, followed by treating the resulting mixture with a high-voltage electric discharge and mixing with the remaining dry components of the concrete mixture, cement and aggregates, selected for prototype SU N 1701707 A1, publ. 12/30/91.

 The disadvantages of this method is the excessive consumption of electricity due to the local action of electric discharge, the instability of the discharge, the possible decomposition of chemical additives under the influence of force factors accompanying the discharge, which significantly reduces the efficiency of activation.

 To improve the quality of the water-cement mixture and the resulting concrete to withstand it at low temperatures, it becomes necessary to introduce antifrosty chemical additives (for example, CN, HC, NN, potash).

 To solve this problem, a method for activating a hardening mixture is proposed. It consists in exposure to high-voltage electric discharges that occur between the electrodes in the mixing water, followed by the removal of the treated water from the activator chamber to a supply tank, where chemical anti-frost additives are introduced. Next, activated water is fed to mix the dry components of the concrete mixture.

 Under the influence of force factors accompanying the high-voltage electric discharge, intense dissociation of water molecules occurs, with the release of oxygen ions, hydrogen, free radicals, and the partial introduction of antifrosty additives enhances and stabilizes its activity. After mixing the binder with aggregates with activated water, the hydration reaction proceeds more intensively, which is very important during winter concreting. At the same time, the savings in antifreeze additives depending on the temperature of aging of concrete can be 50%.

 New is the method of exposure to mixing water with its subsequent withdrawal from the activator chamber and the additional introduction of antifrosty additives. This allows separate activation of the components of the concrete mixture (water) before mixing them, while a significant reduction in the amount of added additives is possible.

 The method does not follow from the existing level of technology, but due to separate activation, the introduction of antifreeze chemical additives is possible. In this case, a more effective complex activation of mixing water occurs, which allows us to conclude that the criterion of "inventive step" is met.

 This method activates the hardening mixture without additional complex equipment, at lower cost than the known methods, which meets the criterion of "industrial applicability".

 The claimed technical solution is illustrated by the drawing, which shows a diagram of the activation of mixing water with the subsequent introduction of additives.

 In the capacity of the working chamber 1, filled with mixing water 2, electrode pairs 3 are dispersed, connected in series.

 The inventive method is as follows: the working chamber-activator 1 is filled with water 2 and a voltage U is applied to the circuit of the high-voltage electrodes 3, and at the same time, a high-voltage electric discharge 4 is applied to all the electrodes in the medium being processed. Next, the water is fed into the supply tank 5, where the necessary calculated amount of additives 6 is introduced. After that, the dry components of the prepared concrete mixture are closed with treated water.

 Application of the proposed activation method reduces the amount of salts introduced and thereby improves the quality of concrete, increases its durability, reduces the cost of construction products.

Claims (1)

 A method of activating a hardening concrete mixture, including activation of mixing water by high voltage electric discharges occurring between electrode pairs, introducing a chemical anti-frost additive into water and mixing the resulting mixture with dry components of the concrete mixture, characterized in that said activation is carried out by processing the mixing water, after which it is mixed with a chemical anti-frost additive.