SU1747631A1 - Reinforcement bar member - Google Patents

Abstract

Use: in construction for corrosion protection of prestressing reinforcement, in particular, which is not in adhesion with concrete. Summary of the Invention; In the factory, the reinforcement is covered with an elastic sheath. At the fixation points of the prestressing reinforcement to the reinforced concrete product, dielectric elastic parts are used to prevent electrolytic dissociation: ring clamp, jacket and gasket, which isolate the reinforcement and its anchorage from the reinforced concrete product. 1 il.

Description

The invention relates to construction and is intended to protect against corrosion of prestressing reinforcement, in particular, which is not in adhesion with concrete.

It is known that devices for protecting valves against corrosion have a number of drawbacks, both technical and operational.

As is known, the channels in which the prestressed reinforcement is located, are injected with a concrete solution in order to protect the reinforcement from corrosion.

The drawback of the device is unreliable protection of the reinforcement, as during operation of reinforced concrete structures, cracks in the stretched concrete as well as in the injection concrete inevitably appear, then the corrosion of the reinforcement begins, not only in corrosive environments, but also in normal ones. In addition, at the points of contact between the reinforcement and the concrete, the corrosion process due to electrolytic dissociation is enhanced.

A reinforcing element is known that contains reinforcement with a threaded end, which is passed through a hole in a concrete anchor and on which a tension nut with a metal lining is installed, as well as a reinforcement covering the protective sheath with an elastic ring clamp.

The disadvantages of this device are its unreliable protection of the reinforcement against corrosion due to possible electrolytic dissociation.

Devices are known that include metal or alloy elements associated with reinforcement with an electrical potential higher than the potential of the reinforcement, the elements are installed on the surface of the concrete product and are connected to the reinforcement by means of conductors.

The disadvantages of these devices are unreliable protection of valves, the high cost of metals used.

The aim of the invention is to improve the reliability of protection of valves against corrosion

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si and improvement of technological properties of the device.

This goal is achieved by the fact that in factory conditions the reinforcement is covered with an elastic sheath. At the points of fixation of the prestressing reinforcement to the reinforced concrete product, dielectric elastic components are used to prevent electrolytic dissociation — an annular clamp, a jacket, and a gasket, which isolate the reinforcement and its anchoring from the reinforced concrete product.

Thanks to the proposed device, it is possible to reliably protect the reinforcement against corrosion, as a result of which the durability of the reinforcement and the building as a whole increases, it is also possible to use the reinforcement after dismantling the building. The proposed method is technologically simple.

The drawing shows schematically the prestressing reinforcement in an elastic sheath, the insulation of the reinforcement and its anchor.

In the factory, high-strength reinforcement 1 is covered with an elastic sheath 2. At the site of anchoring, the bare end of the threaded steel element is insulated from the external environment and from direct contact with concrete 3 in order to prevent electrolytic dissociation.

Insulate the bare end of the reinforcement in this way.

The elastic ring clamp A is threaded onto the steel element on which the elastic jacket 5 is also put on, and the latter is fastened with the clip; then the steel element 1 is installed with the parts 4 and in a given place, then the threaded end of the reinforcement is threaded into the elastic 6 and

Claims (1)

into the metal 7 gasket, which lie on the concrete 3, then they tighten the steel element 1 by twisting the nut 8. Claim of the invention The reinforcing element containing a armature with a threaded end that is passed through the hole of the concrete anchor and on which is installed a tension nut with metal a lining, and also the covering covering fittings a protective cover with An elastic ring clamp, characterized in that, in order to increase the reliability of protecting the valve against corrosion and prevent the electrolytic dissociation process, it is provided with an elastic jacket installed at the end of the reinforcement and an elastic gasket located under the metal lining, and the protective sheath of the reinforcement is made of an elastic material. at 7 P Bmw  : Ј: ;;; .. /; il Ј v-4--  “-.- .Т .., V. ““ S c. ; in c. / &  -. ". at .. "Ec:" -. i  . . “J. .... . at .T ;; 5x P but y t N-t-W about 1 G about ,: f. . o, J , with with   . G j l - ± j ± iЈuiij-ii 5x four