SU1622120A1 - Method of compacting concrete mix - Google Patents

Abstract

The invention relates to the construction and can be used in the manufacture of concrete products. The purpose of the invention is to increase the strength, accelerate the hardening process while reducing energy consumption. A volumetric grid made of aluminum conductors of increasing resistance with a resistance difference of 0.010 ohms is placed in the mold. Then the concrete mix is placed and a voltage of 3-5 kV is applied to the plate-electrodes. As a result, discharges are successively carried out along the entire length of the product being formed: 4-5 discharges per 1 dm3 of the product — the concrete mix is compacted and heated. 3 ill., 1 tab.

Description

The invention relates to the construction and can be used in the manufacture of building products.

The purpose of the invention is to increase the strength, accelerate the hardening process while reducing energy consumption.

FIG. 1 shows an apparatus for carrying out the method; in fig. 2 is a graph of concrete strength (Ru) as a function of the number of discharge pulses (p) at a voltage of U 5 kV, the length of the interelectrode gap G 50 mm for 28 days of age; FIG. 3 is a graph for determining the timing of hardening of a concrete mixture at a voltage of U 5 kV and G 50 mm.

The bulk grate is placed in a mold with a concrete mix. From the voltage source 1, the electrodes 2 plates are supplied with a constant voltage of 3-5 kV. As a result, discharge occurs through

one of the vertical conductors of the grid 3, having at the moment the least resistance. There is a local compaction of the concrete mix 4. Then the discharge is repeated through the next conductor, having the least resistance among the remaining conductors, and so the discharges are successively passed through all the conductors of the grid. At the same time, the concrete is saturated with aluminum ions and heated, which speeds up the process of concrete hardening. Different resistances of vertical conductors with the same length are obtained by using conductors of different cross sections or using double conductors. The distance between the electrodes is 150-200 mm n more. The number of bits is 4-5 per dm3.

An example. Formed concrete cubes with a size of 100x100 100 mm. Up05 Yu Yu

Yu

Q

sinking is performed for a part of the samples by a known method (voltage 50 kV), for the other part - a series of pulses with a change range of 3-6 at a voltage of 2-6 kV using aluminum resistive conductors (AR 0.01 Ohm) . The samples are processed at a blasting conductor length of 50 mm (the control sample is processed by a known method by direct breakdown at a voltage of 50 kV and an interelectrode gap of 50 mm). The data is tabulated

Thus, the beginning of the hardening of the test sample occurs 15 minutes later than the control, and the end of the hardening begins 20 minutes earlier than the control sample.

Claims (1)

Invention Formula A method of compacting a concrete mix by passing an electric discharge through a concrete mix located between two opposite electrodes, characterized in that, in order to increase strength, accelerate the hardening process while reducing energy consumption, a series of parallel is established in the concrete mix along the entire length of the molded product Along with the electrodes, aluminum conductors of increasing resistance, the discharge density at a voltage of 3-5 kV is 4–5 bits per 1 dm3. FIG. one 20 Yu 250 275 300 325 350 375 4OO 425 50O Elapsed time since the preparation of the mixture, meme Fig.Z FIG. 2