Composite Mesh

Abstract

The invention of this utility model relates to the manufacture of fiber-reinforced polymer meshes made of non-metallic materials. It is used for masonry, brickwork, reinforcement of concrete structures, soil reinforcement, fences, It is used to extend the useful life of roads, etc. The purpose of this utility model is to create an FRP mesh with high consumer characteristics, physical and mechanical properties. At the same time, the objective is to ensure high axial tensile strength in both the longitudinal and transverse bars. The FRP mesh is made by connecting vertical and horizontal bars according to the principle of this utility model. The lattice part of the shell is made by connecting hardened rods and unhardened rods at right angles, and then meshing them together. It is formed by hardening, in which case the rod connection belongs to the formed longitudinal rod This is done by feeding a fiber bundle, which is then split into strands of uneven thickness. divided and oriented perpendicular to the longitudinal axis of the transverse rod and opposite its radial surface This covers the side area, forming a cavity between the straight portion of the vertical rod and the surface of the horizontal rod. (Figure 6, Table 2)

Description

[Technical Field]

[0001] This utility model is applicable to masonry, brickwork, reinforcement of concrete structures, soil reinforcement, fences, This is about FRP mesh made from non-metallic materials used to extend the life of roads. [Background technology]

[0002] The method of connecting the FRP rods is based on the prior art [Patent No. 2404892 No. MPC B29 / C 55 / 30 and Patent No. 2430221 MPC E04C 5 / 07. Intersecting FRP rods are connected by drawing and heating the rods and joint points. do. The drawback of this connection method is the insufficient strength and reliability of the joint, especially under alternating loads. is. The prior art [RF Patent No. 171181 MPK E04C5 / 07] has a hardened rod and an unhardened rod. FRP rods formed by contacting the rods at an angle and then hardening the mesh A bonding method for the rods is shown, where the rods are clamped and glued together with a polymer. Furthermore, this rod is designed to connect one rod (the inner rod) to the other rod (the outer rod). The rods are bonded by passing them through the structure, and the outer rods are attached to both sides of the longitudinal axis of the rods and the inner rods. The two sides of the rod are glued together. The cavity between the surfaces is partially or completely filled with polymer. The drawback of this type of connection is that the outer rod needs to be threaded to thread the inner rod through the outer rod structure. The fibers may split in half and the small contact area may cause the product to become brittle and split axially. If you avoid this, only half of the rod will be functional and the product may tear at the joint. The closest technical solution to this problem is non-metallic FRP mesh [R F Patent RU 2714060 MPK E04C 5 / 073. This mesh is made of fibers extending from the longitudinal bars along the horizontal bars. The ribbons are arranged to cover the surface of the horizontal bar from top to bottom, resulting in a mesh-like structure (mesh A lattice part is formed This drawback is due to the small contact area of ​​the longitudinal sections made from twisted ribbons of equal width. This makes the final product brittle. Summary of the Invention

[0003] The objective of this invention is to produce FRP mesh with high consumer characteristics, physical and mechanical properties, and The goal is to ensure that both the rods and cross bars have a high resistance to axial tension. The problem is to connect the vertical and horizontal bars by the method described in this utility model, and form the grid part of the mesh. The mesh is formed by connecting hardened and unhardened rods at right angles. This can be overcome by hardening the fiber bundle attached to the vertical rod. The strands are of unequal thickness and are connected perpendicular to the longitudinal axis of the cross rods. The vertical rods are installed on the horizontal rods and cover their radial surfaces. A cavity is formed between them. In one embodiment, the grid sections of this mesh are square. In some embodiments, the mesh lattices have a smooth or abrasive coating. There are. In one embodiment, the crossbar features a contoured pattern (ribs). In one embodiment, a single fiber bundle splits as follows: 5-15% of the fiber bundle splits into the first part. 85-95% of the time, the second part forms. According to the method for forming the lattice part of this mesh, the horizontal bars are securely fixed by the vertical bars, and the horizontal bars are Contact points are formed on both sides of the rod, located on either side of the longitudinal axis of the vertical rod. The mesh cells are knotted evenly in the direction perpendicular to the mesh surface, and the tensile strength in the axial direction is High tensile strength is achieved by placing more strands on one side. When elongation occurs along the longitudinal trajectory, the areas with a higher strand mass act to produce the final Prevents warping of the product (mesh) surface. The hollow space between the straight part of the vertical bar and the surface of the horizontal bar allows the mortar to penetrate securely. This ensures that the shoe is securely fixed in place when it is fixed to concrete. Further technical solutions are explained using graphs and practical examples of FRP meshes. [Brief explanation of the drawings]

[0004] [Figure 1] Overall view of a mesh with square lattice sections [Figure 2] Diagram of the FRP rod connection in the cross section of the horizontal bar [Figure 3] Diagram of the FRP rod connection in the cross section of the vertical rod [Figure 4] Diagram showing mesh formation and weaving knots. Figure 4 shows mesh formation and weaving knots. [Figure 5] Diagram of axial tension in a longitudinal bar when the fiber distribution around the cross bar is uneven. Figure 5 is a diagram of axial tension in a longitudinal bar when the fiber distribution around the cross bar is uneven. [Figure 6] Figure 6 is a diagram of the axial tension in the vertical bar when the fibers are unevenly distributed around the bar. Figure 7 is a diagram of the axial tension in the vertical bar when the fibers are evenly distributed around the bar. DETAILED DESCRIPTION OF THE INVENTION

[0005] The FRP mesh consists of vertical bars (1) and horizontal bars (2) (Fig. 1). The grid of the mesh is made of hardened horizontal bars. The contact zone (3) is formed by a vertical bar (1) connected at right angles to the longitudinal axis of the vertical bar (1). The vertical cores (1) are knitted around the horizontal cores (2). As a result, a cavity (4) is formed (Fig. 2). The cross section of the vertical bar (1) is varied, with a round center (Fig. 3) and a horizontal bar (Fig. The contact area (3) at the joint with (2) is flat. The rods are connected as follows: The fiber bundle passes through three parallel impregnation and pressing units. The fiber bundle is immersed in the compound. Excess compound is squeezed out at the outlet of the unit. One is horizontal. One is for impregnating fiber bundles, and the other two are for impregnating vertical fiber bundles. be. After the impregnation and pressing device, a pattern forming device for the horizontal bar is used. The fiber bundles are joined to form a crossbar, which is then patterned. The horizontal bar passes through a water cooling unit and enters a chamber for hardening at high temperatures. , which is sent to a return wheel that reverses the direction of movement of the crossbar. A tensioning device is used to keep the crossbar moving. The wire then enters the feeder (a device for distributing, collecting and supplying the wires to the FRP mesh forming and weaving device). After passing through the impregnation press, the vertical rods enter the FRP mesh forming and weaving device (Fig. 4), where the vertical rods are The rod roving bundle is formed. The fiber bundle that forms the longitudinal rod enters the opening of the gear and is For example, 5% of the rovings form one bundle and 95% of the rovings form another bundle. The gears are designed with grooves between the openings, and the crossbars rotate. The material is fed into the groove by two polyurethane-coated wheels. The test results are shown in the following tables and figures (Table 1, Table 2, Figure 5, Figure 6). Dividing the fibers (2mm, 4mm, 6mm diameter) into uneven bundles and distributing them around the horizontal bar results in an average of 900- It was shown that an axial tensile strength of 1100 MPa could be obtained. The FRP mesh of this invention has high consumer properties, enhanced physical and mechanical properties, It is distinguished by its high axial tensile strength in all directions. Table 1. Results of axial tension tests on vertical bars when FRP mesh bundles are unevenly arranged around the horizontal bars. JPEG2025527444000002.jpg238168 Table 2. The longitudinal FRP mesh rods when the bundles are evenly distributed around the transverse rods Axial tension test results JPEG2025527444000003.jpg238168

Claims

1. This FRP mesh is made up of vertical and horizontal bars, with hardened horizontal bars and unhardened vertical bars connected at right angles. The rod is characterized in that the mesh lattice portion is formed by subsequent hardening. The connections are made by longitudinal fiber bundles, which are made up of strands of unequal thickness. and portions of the radial surface on opposite sides thereof oriented perpendicular to the longitudinal axis of the transverse rod. Cover.

2. An FRP mesh manufactured according to claim 1, characterized in that the lattice portion is square.

3. 2. The FRP mesh manufactured according to claim 1, wherein the grid portion of the mesh is coated with a smooth or polished coating. It has been given a ting.

4. FRP mesh manufactured according to claim 1, characterized by a uniform contoured pattern of cross bars (ribs). Something.

5. An FRP mesh manufactured according to claim 1, comprising fiber bundles divided into bundles as follows: 5-15% of the rovings form a bundle, and 85-95% of the rovings form a What forms the second bundle.

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