RU134967U1 - COMPOSITE FITTINGS (OPTIONS) - Google Patents

Abstract

1. Composite reinforcement, characterized in that it contains at least one bundle made of fiberglass interconnected by resin-cured resin, a bundle of other fiberglass is arranged on the surface of the bundle, the bundle fiberglass is interconnected with the fiberglass bundle, inside the bundle there is a metal core with hooks made on its surface in the form of protrusions on the core surface, the cross-sectional area of the core is selected within 5-30% of the cross-sectional area a, and the angle β of the inclination of the fiberglass bundle is selected within 1-89 ° to the longitudinal axis of the bundle. 2. Composite reinforcement, characterized in that it contains at least one bundle made of fiberglass interconnected by resin-cured resin, a bundle of other fiberglass is arranged on the surface of the bundle, the bundle fiberglass is interconnected with the fiberglass bundle, located inside the bundle, at least two metal cores twisted together along the longitudinal axis of the reinforcement, forming a wave-like surface in the places of twisting, which mesh with the fiberglass tow, strand core cross section chosen in the range of 5-30% of the cross sectional area of the harness, and the angle β of inclination of the glass fibers of the beam selected within 1-89 ° to the longitudinal axis zhguta.3. Composite reinforcement according to claim 1 or 2, characterized in that the reinforcement is used as electric current transmission elements.

Description

The utility model relates to construction, in particular, to non-metallic reinforcement for reinforcing structures made of adhesive materials. In this description, three options for reinforcement are presented, one of which provides for its use for transmitting electric current in an array of cured concrete.

Known composite reinforcement, reinforcing bars, methods for their manufacture, presented in the descriptions of patent documentation:

CA2298281A1, 08.08.2001; CN1587576A, March 2, 2005; CN201280782Y, July 29, 2009; US2005064184 A, March 24, 2005; and US 7396496 B2, July 8, 2008. The rods of known reinforcement have a mainly circular shape in cross section.

The essential requirements for composite reinforcement are to ensure reliable adhesion of reinforcement to concrete and to prevent failure of reinforcement in cured concrete during operation of the concrete structure. In this regard, the round shape of the reinforcing bar reduces the resistance of the reinforcement to its displacement in the solidified concrete mass during torsion and bending.

In order to increase the adhesion of reinforcement to concrete, it is performed with various kinds of hooks, thickenings, or, for example, undulating (RU 2431026 C1, 10.20.2011) or in the form of a flat tape with a certain ratio of width to thickness (RU 2388878 C1, 05/10/2010).

In another known composite reinforcement containing fibers, resin and hooks, the latter are formed by a layer of sand fixed on the cured surface of the reinforcement, while the hooks are made at the ends of the reinforcing bars in the form of thickenings, each thickening is made in the form of a winding coated with abrasive material or cement (RU 2001113390 A, 05/10/2003; RU 82244 U1, 04/20/2009; RU 104953 U1, 05/27/2011).

A close technical solution to the solution presented in this description is composite reinforcement, characterized in that it contains bundles made of fibers, interconnected by twisting around each other and fixing in this position with a cured resin, and indentations are formed between turns of bundles (RU 2430220 C2, 08.20.2010). The fittings are made of high-strength polymer material with a winding forming ledges. The fibers are combined into bundles, the reinforcing bar is formed by twisted bundles, the diameter of each bundle is 25-47% of the diameter of the reinforcing bar, the number of bundles is selected at least three, and the number of twists of bundles per meter rod is in the range of 5-120. It should be noted that the number of bundles in the reinforcement equal to at least three leads to the fact that voids form between the bundles, which are also filled with resin. The voids filled with the cured resin significantly weaken the reinforcement and give it brittleness due to the greater brittleness of the cured resin compared to the brittleness of the resin-impregnated fibers. It was also found that the tensile, bending and compression strength of the reinforcement depends on the resin content in the reinforcement, and in this regard, there is an optimal ratio of resin and fibers in the reinforcement. Since in the known reinforcement its surface is smooth, and it is formed by three bundles, this reduces the adhesion of the reinforcement to concrete due to the reduction of the recesses between the bundles; As a result, during the operation of tensile reinforcement in hardened concrete, shifts are possible relative to concrete, and the round shape of each bundle reduces the torsion resistance of the reinforcement. A significant disadvantage of the known reinforcement is its relatively insufficient flexibility. When loading the reinforcement in the given modes, the reinforcement becomes brittle.

Known fiberglass reinforcement, which contains a supporting rod of high-strength polymer material and a winding with ledges (RU2194135C2, 11/22/2000). In this reinforcement, the ledges are made in the form of a bundle of threads impregnated with a binder and spirally applied with tension, the bundles are pressed into the surface of the supporting rod, and the diameter of the winding of the bundle is up to 2d, where d is the diameter of the supporting rod. In the reinforcement made according to the second embodiment, the ledges are made in the form of a bundle of threads impregnated with a binder and spirally applied tightly, pressed into the surface of the supporting rod so that the ropes alternate with spiral ledges and recesses in the form of grooves on the rod. The diameter of the bundle winding is up to 2d. In the fiberglass reinforcement made according to the third embodiment, the ledges are made in the form of a bundle of threads impregnated with a binder and spirally applied with tension, while the rod is equipped with a second strand of threads with the opposite direction of winding relative to the first bundle, and the diameter of the winding of the first bundle is up to 2d. The specified embodiment of the reinforcement allows to increase its bearing capacity.

A close composite reinforcement to the reinforcement described in this description is a metal-fiberglass composite reinforcement containing a support rod, the surface relief of which is created by a winding bundle, the support rod being made in the form of a composite matrix consisting of a steel core and fiberglass threads impregnated with a binder composite material and deposited on a steel core, and a winding fiberglass bundle with the help of multi-thread winding is wound onto an epoxy-impregnated compound nyuyu surface of the rod (RU120984U1, 10.10.2012). The technical task of this utility model is to increase the tensile and bending strength of a reinforcing bar and the reliability of the adhesion of the bar to concrete. In this utility model, the steel core has a smooth surface and a diameter of not more than half the diameter of the reinforcing bar. Fiberglass threads are applied to the steel core with single or multiple windings. In another embodiment, the threads and the core are made together. Fiberglass threads are applied to the steel bar in the form of a helical or corrugated surface in order to create a corrugated or helical surface of the bar. A fiberglass bundle is wound onto a surface previously impregnated with an epoxy compound and pressed with a force that should not exceed the flexural strength of fiberglass yarns. The shape of the tourniquet after pressing and gluing is an elliptical shape. For bending, the reinforcing bar has a steel core. The steel core allows the use of this reinforcement without preliminary tension, since the elastic modulus of this core is higher than the reinforcing bar made of homogeneous fiberglass.

The reinforcement according to patent RU 120984, having a smooth steel core, does not provide for the selection of thermal expansion coefficients of the bearing rod and the steel core, which leads to microscopic shifts of their contact surfaces relative to each other when heated and cooled. In this case, the smooth surface of the steel core contributes to these shifts, which lead to breaks in the bonds between the surfaces of the core and the supporting rod. As a result, in the process of loading concrete with metal-fiberglass reinforcement, the reinforcing rod and the core work separately from each other, and the design reinforcement bearing strength inherent in the concrete structure design is significantly reduced. In this case, the concrete is destroyed in an unintended zone of its destruction.

The technical result of the utility model presented in this description is to increase the bearing capacity of the reinforcement. Another technical result is the expansion of the functionality of the fittings.

The specified technical result was obtained by composite reinforcement, characterized in that it contains at least one bundle made of glass fibers interconnected by cured resin, a bundle of other glass fibers is arranged on a surface of the bundle, fiber bundles are connected to each other and to the fiber bundles inside the bundle there is a metal core with hooks made on its surface in the form of protrusions on the core surface, the core cross-sectional area is selected to the limit x 5-30% of the cross-sectional area of the bundle, and the angle of inclination of the fiberglass bundle is selected within 1-89 ° to the longitudinal axis of the bundle.

The specified technical result was obtained by composite reinforcement, characterized in that it contains at least one bundle made of glass fibers interconnected by cured resin, a bundle of other glass fibers is arranged on a surface of the bundle, fiber bundles are connected to each other and to the fiber bundles at least two metal cores twisted together along the longitudinal axis of the reinforcement are located inside the bundle, forming a wave-like surface located in meshing with the fiberglass tow, the cross-sectional area of the core is selected within 5-30% of the cross-sectional area of the tow, and the angle of inclination of the fiberglass bundle is selected within 1-89 ° to the longitudinal axis of the tow.

To expand the functionality of the valve, it was used as an electric current transmission element. Figure 1 shows a first embodiment of composite reinforcement;

figure 2 shows a second embodiment of composite reinforcement;

figure 3 - arrangement of bundles of fiberglass on the bundle.

The first embodiment of the composite reinforcement (Fig. 1) comprises at least one tow 2 made of fiberglass 1, the fiberglass of which is connected by a cured resin 3, conventionally shown by point retouching. On the surface 4 of the bundle 2, a bundle 5 is arranged in a spiral, made of fiberglass 6, which is connected by a cured resin to each other and to the fiberglass 1 of the bundle 2. The fiberglass of the bundle 5 is located so that hollows 8 are formed between the turns of the bundle 7, located along the entire length of the reinforcement and forming hooks for concrete.

Inside the tow 2 is a core 10 made of metal, extending along the entire length of the reinforcement. The core 10 has the shape of a rod, on whose surface hooks are made 11. For reinforcing bars having relatively large diameters, the core can be made, for example, of a standard metal reinforcing bar with hooks on its surface.

The second version of the composite reinforcement (figure 2) contains elements of the first option, with the exception of the core of the first option. In the second embodiment, there is another core made of at least two metal wires twisted together along the longitudinal axis of the reinforcement, forming a pair of cores 12. At the twisting points of the cores 12 they form a wave-shaped surface 13 with recesses 14. A wave-shaped surface 13 and recesses 14 they form core hooks meshed with fiberglass of tow 2. In the second embodiment of the composite reinforcement, a metal rope having many wires or erdechnikov 12 twisted together in a predetermined order. The wave-like surface of the rope forms hooks that are securely connected to the fibers 1 and resin 3 of the tow 2.

In both versions of the reinforcement, its cores are made of metal or from bimetal, or from a special metal alloy with other components that give the core properties of a material close to the material of the reinforcing rod 2 in terms of their thermal expansion.

In both versions of the reinforcement, the core cross-sectional area is selected within 5-30% of the cross-sectional area of the reinforcement tow 2, and the angle (3 inclination of the fiberglass bundle 5 is selected within 1-89 ° to the longitudinal axis of the tow 2).

The option of using reinforcement for the transmission of electric current through the reinforcement located in the solidified concrete array is provided. In this case, an electric current is passed through the core of the valve. Each end of the core of the reinforcement may have a hole or a thickening for connecting this end to the other core of the other branch of the reinforcement or with an electrical connector, through which the cores of the two branches of the composite reinforcement are connected to each other and to power lines during the installation of the structure.

Reinforcement is made by impregnating reinforcing fiber with resin, and first a tourniquet 2 is made with a core in it, and then a bundle of 5 glass fibers is wound in a spiral with an interference fit. When assembling building structures in the case of using reinforcement for electric current transmission, connectors connect the armature branches according to the specified patterns of its location in concrete structures, and then connect the ends of the armature with the current source and consumer. After the manufacture of the reinforcing branch, its core is sealed and is in a reliable, electrically insulated state.

The fittings are as follows. The segments of the reinforcement are connected together in a spatial reinforcement structure in a known manner, and the reinforcement is poured with concrete or other binding material. In this case, the depressions 8 between the beams 5 are filled with concrete. In the process of concrete curing, its "cementitious particles interact with the surfaces of the depressions 8 and bundles 5 of glass fibers and form a strong connection of reinforcement with concrete.

When heating and cooling concrete, the reinforcement heats and cools. Due to the fact that on the surface of the core of the first version of the reinforcement there are hooks 11, and in the second version of the reinforcement, its wave-shaped surface 13 forms recesses 14, the specified strength of connection of each core of the reinforcement with the bundles 2 is ensured. Selection of the corresponding core materials and bundles according to their thermal properties extensions practically exclude shifts of the surfaces of the cores relative to the reinforcement plaits in a wide range of temperature effects on concrete and reinforcement. Due to the fact that the spiral-shaped bundles 5 form hooks for concrete, the tow 2 has a reliable connection with concrete. The use of the metal core of the reinforcement made it possible to significantly increase the flexibility of the reinforcement, its strength, reduce the fragility of the reinforcement, and provide the possibility of transmitting electric current through it. Moreover, in general, the bearing capacity of the reinforcement is increased.

Claims (3)

1. Composite reinforcement, characterized in that it contains at least one bundle made of fiberglass interconnected by resin-cured resin, a bundle of other fiberglass is arranged on the surface of the bundle, the bundle fiberglass is interconnected with the fiberglass bundle, inside the bundle there is a metal core with hooks made on its surface in the form of protrusions on the core surface, the cross-sectional area of the core is selected within 5-30% of the cross-sectional area a, and the angle β of the inclination of the fiberglass bundle is selected within 1-89 ° to the longitudinal axis of the bundle. 2. Composite reinforcement, characterized in that it contains at least one bundle made of fiberglass interconnected by resin-cured resin, a bundle of other fiberglass is arranged on the surface of the bundle, the bundle fiberglass is interconnected with the fiberglass bundle, inside the bundle at least two metal cores twisted together along the longitudinal axis of the reinforcement are located, forming a wave-like surface in the places of twisting, which mesh with the fiberglass tow the core cross-sectional area is selected within 5-30% of the bundle cross-sectional area, and the angle of inclination of the fiberglass bundle is selected within 1-89 ° to the longitudinal axis of the bundle. 3. Composite reinforcement according to claim 1 or 2, characterized in that the reinforcement is used as electric current transmission elements.

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