SU1206104A1 - Device for activating concrete mix - Google Patents

Description

This invention relates to the manufacture of precast concrete and reinforced concrete products.

The purpose of the invention is to reduce the processing time due to polyfrequency vibrations.

Fig. 1 schematically shows a device for activating a concrete mix, a general view; figure 2 is the same, the view in the plan.

The device for activating a concrete mix consists of a hopper 1 with a flap 2 and an emitter installed in its cavity in the form of a plate 3 mounted by means of shock absorbers 4 on the cross-arms 5, which are fixed to the main 6 and an additional 7 supporting plates arranged parallel to the plate.3 in the windows 8 and 9 walls of the bunker and connected with using elastic pads 10 fixed along the perimeter.

High-frequency I1 and low-frequency 12 exciters are fixed on the main b and additional 7 base plates, respectively, the distance between the axes of the exciters on the vertical is equal to 0.3-0.5 of the length of the radiator plate 3, and the distance from its lower edge to the axis high-frequency oscillator 11 is equal to 0.25-0.35 the length of the plate 3.

The device for activating the concrete mix works as follows.

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  The bunker 1 is filled with a concrete mix and is installed under the mold 13 fixed on the vibrating plate 14. High-frequency II and low-frequency 12 exciters are switched on, the dampers 2 are opened and the forward movement in the horizontal direction is communicated to the bunker 1. Under the action of high-frequency 11 and low-frequency 12 exciters, plate 3 performs polyfrequency oscillations in the horizontal direction, having a variable frequency and amplitude vibration effect in the processed concrete mix, with low-frequency oscillations prevailing in the upper part of plate 3 and .

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In this case, the concrete mixture, moving from top to bottom, under the action of vibration goes into a thixotropic state, air is removed from it, aggregates consisting of cement particles are destroyed, the aggregate is coated with cement paste, the mixture becomes compacted, becomes homogeneous and compacted It leaves the bunker 1 and fills the mold 13. As the latter is filled, the carriage 15, on which the bunker 1 is mounted, moves along the guides 16 along the mold 13.

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Claims (1)

DEVICE FOR ACTIVATING A CONCRETE MIXTURE, comprising a hopper with a window on one of the transverse walls, in which there is a support plate with vibration exciter connected to the latter along the perimeter by means of elastic gaskets, and an emitter installed in the cavity of the hopper, characterized in that, for the purpose of reduction S of the processing time due to poly-frequency vibrations, it is • equipped with an additional base plate installed oppositely to the main window formed on the opposite transverse wall, and connecting the base plates with traverses, the emitter is made in the form of a plate parallel to the main and additional base plates that is mounted on the traverses, vibration pathogens of the main and additional base plates are high and low frequency, respectively, and the vertical distance _e between the axes of the pathogens is © is equal to 0.3-0.5 of the length of the emitter, and the distance from its lower edge to the axis of the high-frequency exciter of oscillations is 0.25-0.35 of the length of the emitter. Ϋ IS Figure 1 SU "... 1206104> 1206 104 ² The hopper 1 is filled with concrete mixture and set it under the form 13, mounted on a vibrating platform 14. Turn on the high-frequency 11