Carbon fiber rib

Abstract

The utility model discloses a carbon fiber rib, and relates to the field of building materials, the fiber rib comprises a steel core, an inner carbon fiber layer, an inner glass fiber layer, an outer carbon fiber layer and an outer glass fiber layer from inside to outside, the inner carbon fiber layer and the outer carbon fiber layer are respectively formed by a plurality of layers of carbon fiber cloth wound on the outer surface of the steel core and mixed with epoxy resin; the inner glass fiber layer is formed by long glass fibers which are wound outside the inner carbon fiber layer and mixed with epoxy resin; the outer glass fiber layer is formed by short glass fibers mixed with epoxy resin; v-shaped ribs are convexly arranged on the outer surface of the outer glass fiber layer; the carbon fiber cloth of the inner carbon fiber layer is one-way woven carbon fiber cloth, and the weaving direction of the carbon fiber cloth is consistent with the axial direction of the fiber ribs; and the carbon fiber cloth of the outer carbon fiber layer is a plain woven carbon fiber cloth. The carbon fiber rib is of a multi-layer composite structure, the production and application cost can be greatly reduced while the structural strength of the rib can be guaranteed, and the industrial applicability and usability are improved.

Description

Technical Field

[0001] The present application relates to the field of building materials, and in particular to a carbon fiber reinforcement. Background Art

[0002] Carbon fiber rebars have gradually attracted widespread attention in engineering applications. Carbon fiber has excellent properties such as high strength, low density, and corrosion resistance, which makes carbon fiber rebars show significant advantages in the fields of construction, bridges, etc. Especially in environments that require high performance, such as corrosion resistance or ultra-high strength applications, carbon fiber rebars have obvious performance advantages over traditional steel bars. However, due to the complex manufacturing process and high cost of carbon fiber materials, the price of carbon fiber rebars is much higher than that of traditional steel bars, which greatly limits its application in large-scale projects. At present, the high cost of carbon fiber rebars has become a major bottleneck in the development of the industry.

[0003] Although existing technologies have made some progress in the production and application of carbon fiber reinforcement, high cost remains the main obstacle limiting the widespread application of carbon fiber reinforcement in most projects. Specifically, existing carbon fiber reinforcements generally use pure carbon fiber materials. Due to the high cost of carbon fiber itself, the overall manufacturing cost remains high. At the same time, during the production process, the mechanical properties of carbon fiber reinforcements mainly rely on the characteristics of carbon fiber materials, without sufficient consideration of the rational configuration of materials and structural optimization. This leads to a high amount of carbon fiber used, failing to maximize its material benefits, resulting in a waste of resources. This high dependence on carbon fiber materials and the lack of design optimization means that although carbon fiber reinforcements have significant advantages in performance, their high cost disadvantage makes it difficult to promote them in cost-sensitive projects.

[0004] The reason for these problems is first of all that the existing technology has failed to effectively optimize the material design of carbon fiber reinforcements. Normally, carbon fiber reinforcements use all carbon fiber or a higher proportion of carbon fiber in order to achieve the best mechanical properties. However, this design approach ignores the scientific distribution and reasonable matching of the material structure. In fact, the high performance of carbon fiber has significant advantages over traditional steel bars, but it is not necessary to use such high-performance materials in all different stress-bearing parts of the reinforcement. Therefore, the carbon fiber material has not been effectively configured according to the stress characteristics of the structure, resulting in an unnecessary increase in the use of carbon fiber. In addition, in the process of promoting the application of carbon fiber reinforcements, research on how to maintain performance advantages while reducing material costs is still in its early stages, and lacks systematic theoretical and practical guidance. This is also an important reason for the limited application of existing carbon fiber reinforcements.

[0005] In response to the above problems, it is of great significance and value to develop a new technology that can reduce the use of carbon fiber while maintaining the performance advantages of carbon fiber reinforcement. Utility Model Content

[0006] The purpose of this application is to overcome at least one of the shortcomings of the existing technology and to provide a carbon fiber reinforcement that uses a multi-layer composite structure to ensure the strength of the reinforcement structure while greatly reducing production and application costs and improving industrial applicability and usability.

[0007] To achieve the above-mentioned purpose, the present application discloses a carbon fiber reinforcement, which comprises, from the inside to the outside, a steel core, an inner carbon fiber layer, an inner glass fiber layer, an outer carbon fiber layer, and an outer glass fiber layer, wherein the inner carbon fiber layer and the outer carbon fiber layer are both composed of multiple layers of carbon fiber cloth wound on the outer surface of the steel core and mixed with epoxy resin; the inner glass fiber layer is composed of long glass fibers wound around the outside of the inner carbon fiber layer and mixed with epoxy resin; the outer glass fiber layers are all composed of short glass fibers mixed with epoxy resin; the outer surface of the outer glass fiber layer is protruding with V-shaped ribs; the carbon fiber cloth of the inner carbon fiber layer is a unidirectional woven carbon fiber cloth, and the weaving direction of the carbon fiber cloth is consistent with the axial direction of the fiber reinforcement; the carbon fiber cloth of the outer carbon fiber layer is a plain woven carbon fiber cloth.

[0008] In some embodiments, the thickness of the inner carbon fiber layer is 0.2-0.4 times the diameter of the steel core; the thickness of the outer carbon fiber layer is 0.1-0.2 times the diameter of the steel core; the thickness of the inner glass fiber layer and the outer glass fiber layer is 0.4-0.5 times the diameter of the steel core.

[0009] Compared with the prior art, this application has at least one of the following beneficial technical effects:

[0010] 1. Reduce production costs: Through multi-layer composite structure design, the dependence on pure carbon fiber materials is reduced, the amount of carbon fiber used is reduced, and thus the manufacturing cost is significantly reduced.

[0011] 2. Maintain high strength: Under the premise of ensuring the strength of the rib structure, the steel core and composite material structure are adopted to give full play to the respective advantages of carbon fiber and glass fiber and ensure the mechanical properties.

[0012] 3. Improve corrosion resistance: The outer layer uses a combination of glass fiber and carbon fiber, which enhances the corrosion resistance of the carbon fiber reinforcement and is suitable for applications in harsh environments.

[0013] 4. Improve construction performance: The outer surface is provided with V-shaped ribs, which enhance the adhesion of the reinforcement and improve the bonding effect with concrete and other materials, making it easier to construct and apply.

[0014] 5. Enhanced industrial applicability: This design not only meets high performance requirements but also reduces overall costs, making carbon fiber reinforcement more economical and practical in large-scale projects.

[0015] The above-listed beneficial effects are not exhaustive and other potential beneficial effects and detailed technical implementations will be further disclosed in the examples or other description sections of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] After reading the following detailed description in conjunction with the accompanying drawings, you will better understand the various aspects of the present disclosure. The positions, sizes, and ranges of various structures shown in the drawings and the like sometimes do not represent the actual positions, sizes, and ranges. In the drawings:

[0017] Figure 1 It is a structural diagram of an embodiment disclosed in this application.

[0018] Figure 2 It is a schematic diagram of an embodiment disclosed in the present application from another perspective. DETAILED DESCRIPTION

[0019] The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments.

[0020] It should be understood that like reference numerals refer to like elements throughout the drawings. In the drawings, the dimensions of some features may be distorted for clarity.

[0021] It should be understood that the terms used in the specification are only used to describe specific embodiments and are not intended to limit the present disclosure. All terms (including technical and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, the techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered part of the authorization specification.

[0022] As used in this specification, the singular forms "a," "an," "said," and "the" include the plural forms unless otherwise expressly stated. The terms "include," "comprise," and "contain" as used in this specification indicate the presence of the claimed features, but do not exclude the presence of one or more additional features. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. Example

[0023] like Figure 1 、 2As shown, this embodiment describes in detail a specific implementation method of a carbon fiber reinforcement. The overall structure of the carbon fiber reinforcement includes a steel core 1, an inner carbon fiber layer 2, an inner glass fiber layer 3, an outer carbon fiber layer 4 and an outer glass fiber layer 5 from the inside to the outside. The various parts are reasonably coordinated to achieve the technical effect of high strength and low cost.

[0024] Specifically, the core of the carbon fiber reinforcement is the steel core 1, which serves as the primary load-bearing component and provides the reinforcement's basic strength and rigidity. Made from high-quality low-carbon alloy steel, the steel core 1 ensures excellent corrosion resistance alongside high strength and toughness. The surface of the steel core 1 is polished and derusted to ensure good adhesion to the external composite layer, further enhancing the stability of the overall structure. The steel core 1 acts as a skeleton within the entire carbon fiber reinforcement, capable of withstanding significant axial loads. The presence of the steel core 1 imparts a high degree of deformation resistance to the entire composite structure, particularly when subjected to tension.

[0025] An inner carbon fiber layer 2 is tightly wound around the outside of the steel core 1. The inner carbon fiber layer 2 is composed of multiple layers of unidirectionally woven carbon fiber cloth, the weaving direction of which aligns with the axial direction of the fiber reinforcement. This design ensures that the inner carbon fiber layer 2 can fully utilize the high strength characteristics of the carbon fiber when under tension. The carbon fiber cloth is mixed with epoxy resin, which is used to tightly bond the layers of carbon fiber cloth together to form a unified load-bearing body and enhance the durability of the carbon fiber layer. Epoxy resin not only increases the bonding strength but also effectively improves the corrosion resistance of the carbon fiber layer, preventing chemical substances in the external environment from corroding the inner carbon fiber layer 2, especially in environments exposed to moisture and corrosive substances, such as bridges.

[0026] More specifically, the thickness of the inner carbon fiber layer 2 is 0.2 to 0.4 times the diameter of the steel core 1. This thickness design minimizes the amount of carbon fiber used while maintaining mechanical properties, thereby controlling production costs. Reducing the amount of carbon fiber used not only reduces production costs but also makes the composite material lighter, offering significant advantages in structures requiring reduced weight.

[0027] In this embodiment, the outer surface of the inner carbon fiber layer 2 is coated with an inner glass fiber layer 3, which is composed of multiple layers of twisted long glass fibers mixed with epoxy resin. The primary function of the inner glass fiber layer 3 is to further enhance the shear resistance and overall bending resistance of the carbon fiber rebar, and to provide additional toughness in the event of damage to prevent brittle fracture. The use of long glass fibers compensates for the relatively low toughness of the carbon fiber material to a certain extent, resulting in more stable mechanical properties of the composite rebar when subjected to multi-directional loads.

[0028] Specifically, the thickness of the inner glass fiber layer 3 is 0.4 to 0.5 times the diameter of the steel core. This thickness ensures that the inner carbon fiber layer 2 and steel core 1 are protected from lateral loads while enhancing the overall strength of the composite layer. The design concept of the inner glass fiber layer 3 is based on the complementary advantages of composite materials. Through the rational selection of materials and optimized thickness configuration, the inner glass fiber layer 3 can provide the necessary support for the inner carbon fiber layer 2 and steel core 1 when subjected to stress, avoiding localized failure.

[0029] In addition, an outer carbon fiber layer 4 is provided on the outside of the inner glass fiber layer 3. The outer carbon fiber layer 4 is composed of multiple layers of plain woven carbon fiber cloth. The plain weave has higher in-plane shear strength than the unidirectional weave, thereby exhibiting better mechanical properties when subjected to multi-directional loads. The design of the outer carbon fiber layer 4 is mainly to improve the structural properties of the carbon fiber reinforcement and further enhance its overall mechanical properties. The thickness of the outer carbon fiber layer 4 is relatively thin, approximately 0.1 to 0.2 times the diameter of the steel core 1, in order to further enhance the overall strength and corrosion resistance of the carbon fiber reinforcement without significantly increasing the amount of material used. The outer carbon fiber layer 4 and the inner carbon fiber layer 2 complement each other to ensure the long-term stability of the carbon fiber reinforcement under various complex working conditions, especially when subjected to complex loads such as bending and torsion, the outer carbon fiber layer 4 can effectively provide the necessary structural strength and fatigue resistance.

[0030] In this embodiment, the outermost layer is the outer glass fiber layer 5, which is composed of short glass fibers and epoxy resin, and V-shaped raised ribs 6 are provided on the outer surface of the outer glass fiber layer 5. The design of the V-shaped ribs 6 has multiple functions. First, it can increase the mechanical bite force between the carbon fiber reinforcement and the concrete, and enhance the bonding effect; second, these ribs 6 can also effectively prevent the outer glass fiber layer 5 from breaking due to external impact. The presence of the ribs 6 not only improves the impact resistance of the carbon fiber reinforcement, but also significantly enhances the bonding strength with the surrounding concrete, ensuring the stability of the structure during use. The thickness of the outer glass fiber layer 5 is consistent with that of the inner glass fiber layer 3, both of which are 0.4 to 0.5 times the diameter of the steel core 1, ensuring the integrity and durability of the outer layer. This design ensures that the outer glass fiber layer 5 can absorb energy when subjected to external loads or impacts, reduce the stress concentration of the overall structure, and thus extend the service life of the carbon fiber reinforcement.

[0031] In the actual use of carbon fiber reinforcement, this multi-layer composite structure maximizes the respective advantages of carbon fiber and glass fiber through reasonable material configuration and thickness design, so that the carbon fiber reinforcement can maintain high strength while significantly reducing the use of carbon fiber and reducing material costs. For example, in bridge construction, carbon fiber reinforcement can be used in areas that bear the main tensile force. Due to its high corrosion resistance, it will not suffer corrosion damage even after long-term exposure to humid environments, thereby extending its service life and reducing maintenance costs. In addition, the lightweight characteristics of carbon fiber reinforcement make it more convenient during installation and construction, reducing the labor intensity of construction workers and improving construction efficiency. In extreme environments, such as marine engineering or the chemical industry, the corrosion resistance advantage of carbon fiber reinforcement is particularly prominent, making it an ideal choice for these special applications.

[0032] Although exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications may be made to the exemplary embodiments of the present disclosure without departing substantially from the spirit and scope of the present disclosure. Therefore, all such changes and modifications are intended to be within the scope of protection of the present disclosure as defined by the appended claims. The present disclosure is defined by the appended claims, and equivalents of these claims are intended to be included therein.

Claims

1. A carbon fiber reinforcement, characterized in that: The fiber reinforcement comprises: from the inside to the outside, a steel core, an inner carbon fiber layer, an inner glass fiber layer, an outer carbon fiber layer, and an outer glass fiber layer, wherein the inner carbon fiber layer and the outer carbon fiber layer are both composed of multiple layers of carbon fiber cloth wound on the outer surface of the steel core and mixed with epoxy resin; the inner glass fiber layer is composed of long glass fibers wound around the outside of the inner carbon fiber layer and mixed with epoxy resin; the outer glass fiber layers are all composed of short glass fibers mixed with epoxy resin; the outer surface of the outer glass fiber layer is protruding with V-shaped ribs; the carbon fiber cloth of the inner carbon fiber layer is a unidirectional woven carbon fiber cloth, and the weaving direction of the carbon fiber cloth is consistent with the axial direction of the fiber reinforcement; the carbon fiber cloth of the outer carbon fiber layer is a plain woven carbon fiber cloth.

2. A carbon fiber reinforcement as claimed in claim 1, characterized in that: The thickness of the inner carbon fiber layer is 0.2-0.4 times the diameter of the steel core; the thickness of the outer carbon fiber layer is 0.1-0.2 times the diameter of the steel core; the thickness of the inner glass fiber layer and the outer glass fiber layer is 0.4-0.5 times the diameter of the steel core.

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