RU2616033C1 - Mixing method of steel fibro concrete mixture with uniformly-oriented dispersed-reinforcing elements - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: mixing method of steel fibro concrete mixture with uniformly-oriented dispersed-reinforcing elements contains preparing of the sand and cement mixture, adding the metal dispersed-reinforcing elements through the silo, stirring the steel fibro concrete mixture mechanically, unloading the steel fibro concrete mixture into the formwork, at the same time while mechanically stirring the mixture, it is subjected to the effect of rotating magnetic field with the direction opposite to the mixture rotation direction.

EFFECT: imparting of the required uniform spatial orientation to the metal reinforcing elements included in the concrete mixture and improved fibro concrete mixture mixing.

3 cl, 2 dwg

Description

The method relates to the field of construction and can be used to obtain a steel-fiber concrete mixture with uniformly oriented dispersed reinforcing elements in the manufacture of monolithic reinforced concrete structures.

The invention can find application in industrial construction, as well as in the manufacture of floor-resistant industrial premises.

A known method of preparing a concrete mixture, the essence of which is that a concrete mixture is prepared by alternately supplying water and a dry concrete mixture and then mixing the layers and unloading the mixture into the formwork (RF Patent for the invention No. 2249573, C04B 40/00, publ. 10.04. 2005).

The disadvantage of this method is the low productivity.

The closest in technical essence and the achieved result is a method of mixing a steel-fiber concrete mixture with uniformly oriented dispersed reinforcing elements, including the preparation of a sand-cement mixture, adding metal dispersed reinforcing elements using a hopper, mixing the steel-fiber concrete mixture mechanically, and unloading the steel-fiber concrete mixture in opal (RF patent for the invention No. 2068827, 05.20.1991, publ. 10.11.1996).

The disadvantage of this method is that the fibers are unevenly distributed in concrete, which does not allow their full use.

The technical problem to which the claimed invention is directed is to give the metal reinforcing elements contained in the concrete mixture the required uniform spatial orientation and improve mixing of the fiber-reinforced concrete mixture.

The solution to this problem is achieved by the fact that in the method of mixing a steel-fiber concrete mixture with uniformly oriented dispersed reinforcing elements, which includes preparing a sand-cement mixture, adding metal dispersed reinforcing elements using a hopper, mixing the steel-fiber concrete mixture mechanically, and unloading the steel-fiber concrete mixture into the formwork , according to the invention, at the same time with mechanical stirring, the mixture is exposed to a rotating magnetic field with a direction, p in the opposite direction of rotation of the mixture. In addition, mixing is carried out in a concrete mixer with electromagnetic coils located on the body to create a rotating electromagnetic field. In addition, a rotating magnetic field is created by electromagnetic coils, which are located inside the mixer of the concrete mixer.

A single exposure to a rotating magnetic field with a direction opposite to the direction of rotation of the mixture, and mixing in a concrete mixer with electromagnetic coils located on the body to create a rotating electromagnetic field, in which a rotating magnetic field is created by electromagnetic coils that are located inside the mixer, provide metal reinforcing elements, contained in the concrete mix, the required uniform spatial orientation and improved mixing the concrete mixture.

The invention is illustrated by drawings. In FIG. 1 shows a schematic technological line of the proposed method for mixing steel-fiber concrete mixture, including the supply of concrete mixture through the hopper 1, the addition of dispersed reinforcing elements to the concrete mixture through the hopper 2, mixing the steel-fiber concrete mixture with the simultaneous exposure to the electromagnetic field created by the coils 3, unloading the finished steel-fiber concrete mixture 4 formwork 5 from concrete mixer 6. In FIG. 2 is a diagram of an installation with an internal arrangement of electromagnetic coils 3 in a concrete mixer.

The proposed method is as follows.

A cement-sand mortar with a fine-grained aggregate (particle size 1-2) is selected, hydrated with water so as not to impede the orientation (rotation) of the dispersion-reinforcing elements in concrete with mixing. With the help of a hopper, steel fiber is evenly fed into the cement-sand mortar. Mixing of the cement-sand mixture with a uniform supply of fiber occurs in the concrete mixer 6 with simultaneous exposure to a rotating magnetic field (the direction of rotation is opposite to the rotation of the concrete mixer). Under the influence of a magnetic field, disperse-reinforcing elements move in the concrete body, improving mixing (formation of lumps of the mixture is avoided), and disperse-reinforcing elements are given uniform spatial orientation.

The impact on the steel-fiber concrete mixture with an electromagnetic field is carried out simultaneously with mechanical mixing, immediately after the addition of metal fiber, which contributes to better mixing of the mixture as a whole and uniform distribution of the dispersion-reinforcing element in the concrete body.

The resulting mixture is discharged into the formwork.

Thus, this method of mixing a steel-fiber concrete mixture with uniformly oriented dispersion-reinforcing elements mechanically while acting on it with a rotating magnetic field improves the mixing of the concrete mixture, reduces the mixing time and makes full use of the properties of the metal fiber during operation of this structural element, which will increase its operational properties.

Claims (3)

1. A method of mixing a steel-fiber concrete mixture with uniformly oriented dispersed reinforcing elements involves preparing a sand-cement mixture, adding metal dispersed reinforcing elements using a hopper, mixing the steel-fiber concrete mixture mechanically, and unloading the steel-fiber concrete mixture into the formwork, characterized in that it is mechanically simultaneously mixing, the mixture is affected by a rotating magnetic field with a direction opposite to the direction of rotation of the mixture. 2. The method according to p. 1, characterized in that the mixing is carried out in a concrete mixer with electromagnetic coils located on the body to create a rotating electromagnetic field. 3. The method according to p. 2, characterized in that the rotating magnetic field is created by electromagnetic coils, which are located inside the mixer of the concrete mixer.

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