Composite material rib with special-shaped structure

Abstract

The utility model relates to the technical field of building materials, in particular to a special-shaped structure composite material rib which comprises a material rib body, the section of the material rib body is oval, a plurality of flanges are arranged on the material rib body at intervals, and a plurality of annular grooves are formed in the material rib body at intervals. And the plurality of flanges and the plurality of annular grooves are alternately arranged at intervals. According to the composite material rib with the special-shaped structure, the inertia distance can be increased through the oval section design, namely, the center distance of the upper edge and the lower edge is increased, and then the inertia distance of the section is increased, so that the bending deformation resistance of a product is improved, and the disadvantages of low modulus and low shearing strength of the composite material rib are reduced; by arranging the flanges and the grooves, the surface abrasion resistance is improved, the bond stress on concrete is increased, and the technical problems that in the prior art, a composite rib is low in bending deformation resistance, shearing strength and concrete bond stress are solved.

Description

Technical Field

[0001] This utility model relates to the field of building materials technology, specifically to a composite material reinforcement with an irregular structure. Background Technology

[0002] Composite reinforcement is a new material product that can replace steel bars in some concrete applications. It has the characteristics of being lightweight, high-strength, and having excellent corrosion resistance. It can be used to replace steel bars in most non-main load-bearing concrete structures.

[0003] Composite reinforcement bars are mainly prepared by continuously reinforcing fibers, such as basalt fibers and glass fibers, and high-performance resin matrices and additives, through a filament winding process and high-temperature curing. Currently, the main forms of composite reinforcement bars used in the industry, based on appearance and structure, are:

[0004] Plain bar reinforcement: It has a smooth surface without threads and is simple to manufacture. However, during construction, its low bond strength in concrete may cause the concrete structure to be unable to withstand the expected load and reduce its stability. It is rarely used in existing construction projects.

[0005] Threaded reinforcement: In the winding process, "winding" refers to wrapping polyester filaments around resin-impregnated fiber yarn. At this stage, the fiber yarn is not yet cured. The polyester filaments are wound around the surface of the fiber yarn by a winding machine, and under significant tension, the surface of the fiber yarn is compressed to form a "thread." The thread depth is adjusted according to the tension. After winding, it is cured at high temperature. This threaded reinforcement has high longitudinal (along the fiber direction) mechanical properties, but it has no fiber yarn in the circumferential (along the direction perpendicular to the fiber) direction. The bending strength and shear strength of this composite reinforcement are relatively low, making it difficult to use in some special concrete main load-bearing structures with high bending load requirements.

[0006] Sand-coated reinforcement: Quartz sand is applied to the surface of both threaded and non-threaded reinforcement bars. The quartz sand adheres firmly to the surface of the composite reinforcement bar through the adhesive force of the resin, thereby improving the bond strength between the composite reinforcement bar and the concrete. This composite reinforcement bar has a relatively high bond strength. However, due to the complexity and instability of the sand-coating process, uneven sand coating is easily caused during production, making it impossible to achieve a high overall bond strength with the concrete; it is also unsuitable for applications requiring high flexural strength in concrete main load-bearing structures.

[0007] Therefore, based on the current situation of composite material reinforcement in the industry, it can only meet the needs of conventional temporary concrete structures. However, in concrete main load-bearing structures with high bending resistance requirements, it cannot meet the bending and shear strength in specific directions while maintaining the original longitudinal tensile strength. Furthermore, it cannot guarantee the wear resistance of the surface of the composite material reinforcement and its bond strength with the concrete. Utility Model Content

[0008] The purpose of this utility model is to provide an irregularly shaped composite material reinforcement to solve the technical problems of low bending deformation capacity, low shear strength, and low concrete bond strength of existing composite material reinforcements. The specific technical solution is as follows:

[0009] This utility model provides a non-circular composite material rib, including a rib body with an elliptical cross-section, a plurality of flanges spaced apart on the rib body, and a plurality of annular grooves spaced apart on the rib body, with the flanges and annular grooves arranged alternately.

[0010] A further improvement of the irregular-shaped composite material rib of this utility model is that the distance between the adjacent flange and the groove is between 8-15mm.

[0011] A further improvement of the irregular-shaped composite material rib of this utility model is that the radius of the flange and the groove is 0.25mm-0.5mm.

[0012] A further improvement of this utility model of irregularly shaped composite material reinforcement is that the ratio of the major axis to the minor axis of the cross-section of the reinforcement body is greater than 1 and less than 1.5.

[0013] A further improvement of this utility model of irregularly shaped composite material reinforcement is that the reinforcement body includes a glass fiber core and a resin layer, with the resin layer wrapping around the outside of the glass fiber core.

[0014] A further improvement of this utility model of irregularly shaped composite material reinforcement is that the reinforcement body includes a basalt fiber core and a resin layer, with the resin layer wrapping around the basalt fiber core.

[0015] The application of the technical solution of this utility model has the following beneficial effects:

[0016] This utility model of irregularly shaped composite material reinforcement increases the moment of inertia through its elliptical cross-section design, i.e., it increases the center distance between the upper and lower edges, thereby increasing the moment of inertia of the cross-section. This improves the product's resistance to bending deformation, reduces the disadvantages of low modulus and low shear strength of the composite material reinforcement itself, and improves the surface wear resistance and increases the bond strength to concrete through the setting of flanges and grooves. It solves the technical problems of low bending deformation capacity, low shear strength and low bond strength of composite material reinforcement in the prior art.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 This is a longitudinal sectional view of the irregular-shaped composite material rib of this utility model;

[0020] Figure 2 This is a cross-sectional view of the irregular-shaped composite material rib of this utility model.

[0021] Among them, 1. Material rib body; 2. Groove; 3. Flange. Detailed Implementation

[0022] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] See Figure 1 and Figure 2 As shown, an irregularly shaped composite material reinforcement includes a reinforcement body 1 with an elliptical cross-section. The reinforcement body 1 has multiple flanges 3 spaced apart and multiple annular grooves 2 spaced apart, with the flanges 3 and grooves 2 arranged alternately. The reinforcement body 1 can also be designed with a rectangular cross-section, but the cost of a rectangular cross-section is higher than that of an elliptical cross-section; therefore, an elliptical cross-section is preferred. Compared to existing threaded reinforcements with all protruding threads, this invention uses an intermittent thread form, which improves the surface wear resistance of the reinforcement, further increases the friction between the product and concrete, and ensures that the concrete covers the reinforcement from the inside out, thus contributing to the stability of the concrete structure.

[0024] Preferably, the distance between adjacent flanges 3 and grooves 2 is between 8 and 15 mm.

[0025] Preferably, the radii of the flange 3 and the groove 2 are 0.25mm-0.5mm. This radius refers to the radius of the flange 3 protruding from the material rib body 1 and the radius of the groove 2 recessed into the material rib body 1.

[0026] Specifically, the ratio of the major axis to the minor axis of the cross-section of the material reinforcement body 1 is greater than 1 and less than 1.5, preferably 1.25, to ensure that the composite material reinforcement has sufficient moment of inertia.

[0027] In Example 1, the material rib body 1 includes a glass fiber core and a resin layer, with the resin layer wrapping around the outside of the glass fiber core. The resin layer is made of unsaturated polyester resin, epoxy resin, or vinyl ester resin.

[0028] In Example 2, the material reinforcement body 1 includes a basalt fiber core and a resin layer, with the resin layer wrapping around the basalt fiber core.

[0029] This utility model of irregularly shaped composite material reinforcement increases the moment of inertia through its elliptical cross-section design, i.e., it increases the center distance between the upper and lower edges, thereby increasing the moment of inertia of the cross-section. This improves the product's resistance to bending deformation and reduces the disadvantages of low modulus and low shear strength of the composite material reinforcement itself. Furthermore, the addition of flange 3 and groove 2 improves the surface wear resistance and increases the bond strength to concrete. This solves the technical problems of low bending deformation resistance, low shear strength, and low bond strength of composite material reinforcement in the prior art.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A profiled structural composite rod, characterized by, The material includes a material reinforcement body (1), the cross-section of which is elliptical. The material reinforcement body (1) is provided with multiple flanges (3) spaced apart, and multiple annular grooves (2) spaced apart. The multiple flanges (3) and the multiple annular grooves (2) are arranged alternately and spaced apart.

2. The composite profiled structural member of claim 1, wherein The distance between adjacent flanges (3) and grooves (2) is between 8 and 15 mm.

3. The composite profiled structural member of claim 1, wherein The radii of the flange (3) and the groove (2) are 0.25mm-0.5mm.

4. The composite profiled structural member of claim 1, wherein The cross-section of the material reinforcement body (1) is elliptical with a major axis to minor axis ratio greater than 1 and less than 1.

5.

5. The composite profiled structural member of claim 1, wherein The material reinforcement body (1) includes a glass fiber core and a resin layer, with the resin layer wrapping around the outside of the glass fiber core.

6. The composite profiled structural member of claim 1, wherein The material reinforcement body (1) includes a basalt fiber core and a resin layer, with the resin layer wrapping around the basalt fiber core.

Images