RU2540693C1 - Method to produce foam concrete mix using mechanically activated binder - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method to produce a foam concrete mix using a mechanically activated binder, which consists in simultaneous mixing and aeration of the prepared working mortar and foam in the chamber of a rotor pulsation plant at the rotation frequency of the rotor equal to 1500-3000 rpm, providing for pressure of the produced mix for its subsequent transportation to the pouring place. In accordance with the proposed method previously in the rotor pulsation plant there is mechanical activation taking place for the binder, and the working mortar is homogenised with the optimal frequency of rotor rotation equal to 3000-6000 rpm.

EFFECT: reduced consumption of a binder in production of foam concrete of specified density, provision of mix transportation without usage of auxiliary devices to a distance with preservation of its quality indices.

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Description

The invention relates to the field of manufacture of building materials and can be used to obtain and transport light porous concrete.

There are lines for the production of foam concrete products, consisting of a cumbersome complex of plants and equipment: foam generator, activator, mixer concrete mixer, in which the production of foam concrete using mechanical activation of the binder, [RU patent No. 2,333,999 C1, B28C 5/38. Date of publication: 2008.10.27].

The disadvantage of this line for the production of foam concrete products is that when receiving a foam concrete mixture, a large number of additional equipment is used: an activator, a mixer, a foam concrete mixer. This leads to an increase in metal consumption and energy consumption.

Closest to the proposed method is a method implemented in a mobile installation for the production of foam concrete, in which the mixing and porization of the mixture occurs in an airtight hopper equipped with a check valve to relieve excess pressure. The production of foam concrete is carried out due to the multiple circulation of sequentially supplied components (water, cement and surfactant solution) with a rotor-pulsation part, which also serves for the subsequent pumping of the mixture to the place of its laying [patent RU No. 107503, B28C 5/38. Date of publication 08/20/2011].

The disadvantage of this method of producing a concrete mixture is the high consumption of binder per unit of finished product.

The invention is aimed at reducing the consumption of a binder due to mechanical activation of the binder and homogenization of the working solution in the production of foam concrete of a given density, as well as ensuring the transportation of the mixture without the use of auxiliary devices while maintaining its quality indicators.

A method of producing a foam concrete mixture using a mechanically activated binder consists in simultaneously mixing and porizing the prepared working solution and foam in the chamber of a rotary pulsation unit at a rotor speed of 1500-3000 rpm, which ensures the pressure of the resulting mixture for its subsequent transportation to the pouring place. Previously, in the rotary-pulsation installation, the binder is mechanically activated and the working solution is homogenized with a rotor speed of 3000-6000 rpm.

The invention is illustrated in the drawing, where figure 1 shows a production line for the production of foam concrete using a mechanically activated binder.

To implement the production method of a foam concrete mixture using a mechanically activated binder, a production line is used, including containers installed in a certain sequence, for example, 1 and 2, as well as a tank 3 for supplying water. The line includes a foam generator 4 with a capacity of 5 and a dispenser for a foaming agent solution, a compressor 6 for supplying compressed air to the foam generator. The main equipment of the line is a rotary-pulsation unit 7 with a hermetic hopper 8, in which excess pressure is released to the atmosphere using a non-return valve 9. A sealed hopper is connected to the rotor-pulsation unit with an inlet 10 and an outlet 11, valve 12 is installed on the outlet Moreover, in the rotary-pulsating installation, an outlet pipe 13 and a valve 14 are provided for exiting the finished foam concrete mixture to the pouring place 15. The shaft of the rotary-pulsating installation is rotated by and an electric drive consisting of an electric motor 16 and a pulse-frequency converter 17.

The foam concrete mixture obtained using a mechanically activated binder according to the presented method is obtained as follows. Depending on the volume of the sealed hopper 8, a predetermined amount of water is supplied from the tank 1. The rotary-pulsation installation 7 is driven by an electric motor 16, and water circulates in a closed cycle. Cement and, if necessary, sand are dosed into the circulating stream of water through the hopper 8 from the tanks 2 and 3, respectively. Further, from the sealed hopper 8, the components of the foam concrete mixture through the pipe 10 enter the rotary pulsation unit 7. Here, the homogenization and mechanical activation of the mortar mixture take place. In this case, the rotor of the installation rotates with a frequency of 3000 to 6000 rpm. The adjustment of the rotor speed is ensured by an electric drive consisting of an electric motor 16 and a pulse-frequency converter 17. The optimal activation time occurs within 5-10 minutes. After that, the prepared working solution is discharged through the pipe 11 into the sealed hopper 8, where it is continuously circulated. Next, the foam generator 4 is supplied with a foaming solution from the tank 5 and compressed air from the compressor 6.

Obtained in the foam generator 4, the foam is fed into the mixing chamber 7 of the rotor-pulsation installation simultaneously with the circulating working solution. When this valve 12 at the entrance to the hopper 8 is closed. The foam concrete mixture is porized at a rotor speed of 1500-3000 rpm, which creates the necessary pressure of the resulting mixture for its subsequent transportation without the use of an additional device. The finished mixture enters the outlet pipe 13 and then through the open valve 14 through the pipeline enters the filling point 15. The excess pressure from the hopper 8 is vented to the atmosphere using the check valve 9.

Thus, the use of this method for the production of foam concrete allows to reduce the consumption of binder at a given density, as well as to ensure the transportation of the mixture without the use of auxiliary devices at a distance while maintaining its quality indicators.

Claims (1)

A method of producing a foam concrete mixture using a mechanically activated binder, carried out in the chamber of a rotary pulsation installation, which consists in simultaneously mixing and porizing the prepared working solution and foam at a rotor speed of 1500-3000 rpm, providing the pressure of the resulting mixture for its subsequent transportation to the pouring place , characterized in that the mechanical activation of the binder and the homogenization of the working solution at frequencies e rotor rotation of 3000-6000 rpm

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