RU2433227C1 - Reinforcement element for disperse reinforcement of concrete - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: reinforcement element is made in the form of a section of a wire with evenly arranged deformed sections, which form ledges and indents. The latter form a wave with parameters characterised by the ratio of the length (T) to the height (H) equal to T/H=1÷4.5; aligned along the curve to form bumps and cambers, or only bumps, or only cambers, at the same time a 3D product is made.

EFFECT: improved adhesion of the reinforcement element with concrete and increased strength of reinforced concrete products.

Description

The invention relates to reinforcing elements for dispersed reinforcement of building products from concrete and similar mixtures.

Known reinforcing element for dispersed concrete reinforcement, made in the form of a piece of wire with periodically located on its surface protrusions and depressions formed by non-deformed. and deformed sections of wire (USSR Author's Certificate No. 1384688, Е04С 5/07, 10/08/1986).

A distinctive feature of the invention is that the protrusions are formed by undeformed sections of the wire, shifted in the transverse direction with alternation in opposite directions, while one side of the undeformed sections of the wire is located at the level of the corresponding side of the adjacent deformed sections of the wire and forms hollows with them.

The disadvantage of this reinforcing element is the complexity of its manufacture, since it requires the operation of forming a complex cross-section of the depression and protrusion from one diameter of the wire - the workpiece.

Known reinforcing element for dispersed concrete reinforcement, made in the form of a straight piece of wire with periodically located recesses and thickened heads at the ends (US Patent No. 6235108 B1 of May 22, 2001).

The disadvantage of this invention is the lack of adhesion of the element to concrete due to the straightness of the wire and the small area of adhesion to concrete.

Known reinforcing element for dispersed concrete reinforcement, made in the form of a piece of wire from undulating cavities and protrusions evenly distributed along the length of the reinforcing element (US Patent No. 4585487 dated April 29, 1986) - adopted as a prototype.

A distinctive feature of the invention is the presence of a wave with parameters:

- the maximum amplitude is from 1 to 1.5 of the diameter of the wire of the reinforcing element;

- wavelength from 7 to 10 wire diameters;

- wire diameter of reinforcing element up to 1.2 mm;

- the strength of the wire reinforcing element from 110 to 150 kg / mm ² ;

- the length of the reinforcing element is from 45 to 65 wire diameters.

The notes on this reinforcing element are as follows.

Using insufficient wave amplitude of 1 to 1.5

the diameters of the wire of the reinforcing element, leads to a decrease in the adhesion of the reinforcing element to concrete.

The use of a reinforcing element with evenly spaced sections forming wave-like protrusions and depressions in a rectilinear state does not provide a sufficient level of adhesion to concrete and the strength of reinforced concrete products and, therefore, reduces the possibility of using this invention in building structures for various purposes.

The technical result of the claimed invention is to increase the adhesion of the reinforcing element with concrete, increasing the strength of reinforced concrete products and, therefore, expanding the areas of application of the reinforcing element in building structures.

The technical result is achieved by the fact that the reinforcing element for dispersed concrete reinforcement, made in the form of a piece of wire with evenly spaced deformed sections forming wave-like protrusions and depressions, and according to the invention, the protrusions and depressions form a wave with parameters characterizing the ratio of length (T) to height ( Н), equal to: T / N = 1 ÷ 4,5, oriented along a curved line with the formation of a convexity and concavity, or only convexity, or only concavity, while creating a product in 3-dimensional dimension.

The invention is illustrated in figures 1, 2, 3, 4, which depict embodiments of reinforcing wire elements.

Figure 1 presents a General view of a reinforcing wire element having a deformed section forming a protrusion 1, a deformed section forming a depression 2, generally giving a wave with parameters of height H, length T, wire diameter of the reinforcing element D, length of the reinforcing element L.

Figure 2 presents the view of the reinforcing element along arrow A with the presence of convexity and concavity with a bending radius ρ.

Figure 3 presents the view of the reinforcing element in the direction of arrow A with only concavity of radius ρ.

Figure 4 presents the view of the reinforcing element in the direction of arrow A with the presence of only a bulge of radius ρ.

Features of the reinforcing element are as follows.

To increase the adhesion of the reinforcing element with concrete, the protrusions and depressions form a wave characterized by a ratio of length (T) to height (H) equal to from 1 to 4.5. With these ratios, the wave height increases and the wavelength decreases and, thus, the contact area of the reinforcing element with concrete increases due to its increased branching and, therefore, its adhesion to concrete increases. In the prototype, the ratio of wavelength to height is a minimum of 4.66 and higher, i.e. its contact area with concrete on one length of the reinforcing element is smaller and, therefore, adhesion to concrete is lower. In addition, each segment of the reinforcing element has a curvature in the form of convexity and concavity, or only convexity, or only concavity with a radius ρ and creates a product in a 3-dimensional dimension.

The presence of the curvature of the reinforcing element increases its adhesion to concrete due to the appearance of the sliding of the wire along the curved line during the operation of reinforced concrete structures in production conditions. While in the prototype a segment of the reinforcing element is in a straightforward state and the marked effect is absent and, therefore, there is a decrease in the adhesion of the reinforcing element to concrete in comparison with the claimed invention.

The use of a reinforcing element with the presence of a wave in the form of protrusions and depressions in a curved state, with the provision of a convexity and depression in a 3-dimensional dimension, increases its adhesion to concrete and, therefore, increases the strength of reinforced concrete products and expands their scope in the national economy.

General characteristics of the claimed invention with the prototype are:

- the presence of protrusions and depressions forming a wave of the reinforcing element;

- the use of wire for the manufacture of reinforcing element.

The difference between the characteristics of the claimed invention with the prototype is as follows:

- in the prototype, the ratio of wavelength to wave height is from 4.66 to 10, in the claimed invention, this ratio is from 1 to 4.5;

- in the prototype, the wave-like reinforcing element is in a rectilinear state, in the claimed invention, the wave-like reinforcing element is in a curvilinear state with the formation of a convexity and concavity, or only convexity, or only concavity in a 3-dimensional dimension.

These differences allow you to get the positive qualities of the claimed invention, namely:

- reducing the ratio of wavelength to wave height to 1 ÷ 4,5; the use of the curvature of the reinforcing element and the formation of the product in a 3-dimensional dimension made it possible to increase its adhesion to concrete;

- increasing the adhesion of the reinforcing element with concrete leads to an increase in the strength of reinforced concrete products and, consequently, to the expansion of their scope in the national economy.

Tests of concrete cubes reinforced with prototypes of the claimed reinforcing element confirmed an increase in the strength of concrete cubes by 10-12% in comparison with cubes reinforced with ordinary straight-line wire reinforcing elements.

Claims (1)

Reinforcing element for dispersed concrete reinforcement, made in the form of a piece of wire with evenly distributed deformed sections forming wavy protrusions and depressions, characterized in that the protrusions and depressions form a wave with parameters characterized by the ratio of the length T to height H equal to T / H = 1 ÷ 4,5, oriented along a curved line with the formation of a convexity and concavity, or only convexity, or only concavity, while creating a product in 3-dimensional dimension.

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