Cement mortar glass fiber cloth

Abstract

The utility model relates to the technical field of building structure reinforcement, in particular to cement mortar glass fiber cloth which comprises composite material fibers and a base body, the composite material fibers are fixedly connected inside the base body and comprise a plurality of steel fibers and a plurality of GFRP (glass fiber reinforced plastic) tows, and the steel fibers are fixedly connected inside the base body. The outer surface of each GFRP filament bundle is fixedly connected with an alkali-resistant coating, the plurality of steel fiber filaments are uniformly divided into two rows, the plurality of GFRP filament bundles are uniformly divided into three rows, and each row of steel fiber filaments is placed between the corresponding two rows of GFRP filament bundles. According to the utility model, the GFRP tows, the steel fibers, the GFRP tows, the steel fibers and the GFRP tows are alternately arranged in parallel according to the sequence, the steel fibers can provide stronger tensile strength and toughness, the tensile strength, the compression strength and the shear strength of a concrete structure are improved, and the GFRP tows improve the high-temperature resistance and the durability of materials, so that the service life of the concrete structure is prolonged. And the concrete structure can resist erosion of various chemical substances and natural environment.

Description

Technical Field

[0001] The utility model relates to the technical field of building structure reinforcement, in particular to a cement mortar fiberglass cloth. Background Technique

[0002] Traditional reinforced concrete structures mainly use steel bars as reinforcement bars. However, from years of practical experience, it can be found that the problem of steel bar corrosion is very serious. Especially in structures in coastal areas such as the ocean and ports, the corrosion of steel bars causes the bearing capacity of the structure to be greatly reduced, unable to reach the expected service life, not facilitating the improvement of the bearing capacity and durability of concrete structures, reducing the damage degree of the structure under natural disasters such as earthquakes and wind loads, and the huge maintenance and renovation costs cause waste of resources. Content of the Utility Model

[0003] In order to improve the bearing capacity and durability of concrete structures, the utility model provides a cement mortar fiberglass cloth.

[0004] The cement mortar fiberglass cloth provided by the utility model adopts the following technical scheme:

[0005] A cement mortar fiberglass cloth includes composite material fibers and a matrix. The composite material fibers are fixedly connected inside the matrix. The composite material fibers include a plurality of steel fiber wires and a plurality of GFRP wire bundles.

[0006] By adopting the above technical scheme, the steel fiber wires can provide strong tensile strength and toughness, while the GFRP wire bundles, that is, glass fibers, can improve the high-temperature resistance and durability of the material. Thus, the composite material can improve the bearing capacity of concrete structures, be able to resist the erosion of various chemical substances and natural environments, extend the service life of concrete materials, reduce the frequency of structure maintenance and replacement, and thus reduce the maintenance cost.

[0007] Preferably, an alkali-resistant coating is fixedly connected to the outer surface of each GFRP wire bundle, and the alkali-resistant coating adopts a sulphoaluminate cement mortar coating.

[0008] By adopting the above technical scheme, the sulphoaluminate cement mortar coating is weakly alkaline and can protect the GFRP wire bundles from being corroded in an alkaline environment. The GFRP wire bundles coated with the alkali-resistant coating have a simple and easy preparation method, can be mass-produced, and can be well compatible with various building materials.

[0009] Preferably, a plurality of the steel fiber wires are evenly divided into two rows, and a plurality of the GFRP wire bundles are evenly divided into three rows. Each row of the steel fiber wires is placed between the corresponding two rows of GFRP wire bundles, and each row of the GFRP wire bundles and each row of the steel fiber wires are alternately and parallelly placed inside the matrix.

[0010] By adopting the above technical solution, when two layers of GFRP tows are adjacent and steel fiber tows are interlayered, and the matrix is extruded to bond the GFRP tows and steel fiber tows, it will cause the material to be too thick. At the same time, to protect the steel fiber tows, the GFRP tows and steel fiber tows are placed alternately and parallelly, which is beneficial to avoid the excessive thickness of the composite material itself.

[0011] Preferably, the matrix adopts a flexible vinyl ester resin.

[0012] By adopting the above technical solution, the flexible vinyl ester resin is transparent, and the arrangement of the steel fiber tows and GFRP tows can be clearly seen. When there is an arrangement error, the misarranged section can be directly discarded. At the same time, it has high solvent resistance, high hardness and wear resistance, which is beneficial to improving the durability of the overall hybrid material.

[0013] Preferably, a threaded fiber bundle is wound around the outer surface of each GFRP tow.

[0014] Preferably, the outer surface of each GFRP tow is surface anisotropic.

[0015] By adopting the above technical solution, the GFRP tows are immersed in sulfoaluminate cement mortar to obtain GFRP tows coated with an alkali-resistant coating. After the GFRP tows are fully cured, sandblasting is performed on the surface of the cured GFRP tows to enhance the anchoring force of the GFRP tows.

[0016] In summary, the utility model has the following beneficial technical effects:

[0017] 1. This cement mortar fiberglass cloth is provided with steel fiber tows and GFRP tows. To reduce the thickness, they are placed alternately and parallelly in the order of GFRP tow - steel fiber tow - GFRP tow - steel fiber tow - GFRP tow. The steel fiber tows can provide strong tensile strength and toughness, which is beneficial to improving the tensile, compressive and shear strengths of the concrete structure. The GFRP tows, that is, glass fibers, can improve the high-temperature resistance and durability of the material, enabling the concrete structure to resist the erosion of various chemical substances and natural environments, which is beneficial to reducing the frequency of maintenance and replacement of the concrete structure, thereby reducing the maintenance cost;

[0018] 2. This cement mortar fiberglass cloth is provided with an alkali-resistant coating and GFRP tows with special shapes or spirals. The GFRP tows combined with sulfoaluminate cement mortar have excellent alkali resistance and can effectively resist the erosion of alkaline substances in the concrete, thus ensuring the service life of the building. The surface of the GFRP tows is made into a special shape or wound with a fiber bundle into a spiral shape, which is convenient for the outer surface of the GFRP tows with an alkali-resistant coating to also form a special shape or spiral shape after sandblasting construction, enhancing the anchoring force of the GFRP tows. Description of the Drawings

[0019] Figure 1 It is a schematic structural view of a cement mortar fiberglass cloth of the present utility model;

[0020] Figure 2 It is a front view of a cement mortar fiberglass cloth of the present utility model;

[0021] Figure 3 It is a schematic structural view of a GFRP tow in a cement mortar fiberglass cloth of the present utility model;

[0022] Figure 4 It is Figure 2 A partial enlarged structural view at position A in

[0023] Explanation of reference numerals: 1, steel fiber wire; 2, GFRP tow; 3, matrix; 4, alkali-resistant coating. Specific embodiments

[0024] The following further elaborates on the present utility model in conjunction with the attached Figures 1 - 4 drawings.

[0025] An embodiment of the present utility model discloses a cement mortar fiberglass cloth.

[0026] Referring to Figure 1 、 2 、3, it includes composite material fibers and a matrix 3. The composite material fibers are fixedly connected inside the matrix 3. The composite material fibers include a plurality of steel fiber wires 1 and a plurality of GFRP tows 2. The volume percentages of the steel fiber wires 1, GFRP tows 2, and the flexible vinyl ester resin matrix 3 are 27%, 41%, and 32% respectively. The flexible vinyl ester resin matrix 3 is cured between the steel fiber wires 1 and GFRP tows 2 through a pultrusion process.

[0027] Referring to Figure 3 、 4 , an alkali-resistant coating 4 is fixedly connected to the outer surface of each GFRP tow 2.

[0028] The plurality of steel fiber wires 1 are evenly divided into two rows, and the plurality of GFRP tows 2 are evenly divided into three rows. Each row of steel fiber wires 1 is placed between the corresponding two rows of GFRP tows 2. The GFRP tows 2 and the steel fiber wires 1 are both arranged in layers. The interlayer arrangement is steel fiber wires 1 with higher modulus and better ductility, surrounded by a single layer of GFRP tows 2, arranged in sequence. To reduce the thickness, they are alternately and parallelly placed in the order of GFRP tow 2 - steel fiber wire 1 - GFRP tow 2 - steel fiber wire 1 - GFRP tow 2.

[0029] Referring to Figure 1 、 2, 3. In the matrix 3, each row of GFRP tows 2 and each row of steel fiber wires 1 are alternately and parallelly arranged. The steel fiber wires 1 can provide strong tensile strength and toughness, while the GFRP tows 2, that is, glass fibers, can improve the high-temperature resistance and durability of the material.

[0030] Refer to Figure 1 , 3 , the matrix 3 is made of flexible vinyl ester resin. The flexible vinyl ester resin matrix 3 protects the steel fiber wires 1 and GFRP tows 2. At the same time, the flexible vinyl ester resin matrix 3 can be placed in the concrete structure to strengthen the concrete structure, improve the impact resistance, fatigue resistance and durability of the concrete structure, and reduce the damage degree of the concrete structure under natural disasters such as earthquakes and wind loads.

[0031] Refer to Figure 3 , 4 , the alkali-resistant coating 4 is made of sulfoaluminate cement mortar coating. The sulfoaluminate cement selects natural river sand, which belongs to medium sand in Zone II, with a fineness modulus of 2.5. The silica fume selects high-content microsilica powder with a SiO2 content of 97%; the fly ash uses Class I fly ash; the water is ordinary tap water; the water reducer uses polycarboxylate high-performance water reducer; the limestone powder has a mesh number of 325 meshes and a calcium carbonate content of 98%. The combined use of GFRP tows 2 and sulfoaluminate cement mortar has excellent alkali resistance and can effectively resist the erosion of alkaline substances in the concrete, thus ensuring the service life of the building.

[0032] Refer to Figure 3 , the outer surface of each GFRP tow 2 is wound with a spiral fiber bundle, and the outer surface of each GFRP tow 2 is surface anisotropic. The surface of the GFRP tow 2 is made into a special shape or the wound fiber bundle is made into a spiral shape, which is convenient for the GFRP tow 2 with the alkali-resistant coating 4 to also form a special shape or spiral shape on the outer surface after sandblasting construction, enhancing the anchoring force of the GFRP tow 2.

[0033] The implementation principle of a kind of cement mortar glass fiber cloth in the embodiment of the utility model is as follows:

[0034] 1. In the order of GFRP tow 2 - steel fiber strand 1 - GFRP tow 2 - steel fiber strand 1 - GFRP tow 2, place the ultra - fine steel fiber strands 1 with a diameter of 0.3 mm and a volume percentage of 27% and GFRP tows 2 with a diameter of 0.3 mm and a volume percentage of 41% alternately and parallelly, and cure them with a flexible vinyl ester resin matrix 3 between the two types of fibers through the pultrusion process to form a cement mortar fiberglass cloth. The volume percentage of the flexible vinyl ester resin matrix 3 is 32%. The combination of the steel fiber strands 1, GFRP tows 2, and the flexible vinyl ester resin matrix 3 improves the corrosion resistance and durability of the composite material, and also improves the tensile, compressive, and shear strengths, thereby enhancing the load - bearing capacity of the structure, enabling it to resist the erosion of various chemical substances and the natural environment, reducing the frequency of structure maintenance and replacement, and thus reducing the maintenance cost;

[0035] 2. The use of GFRP tow 2 in combination with sulfoaluminate cement mortar has excellent alkali - resistance performance and can effectively resist the erosion of alkaline substances in concrete, thus ensuring the service life of the building.

[0036] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A cement mortar glass fiber cloth, characterized in that: The invention comprises composite material fibers and a matrix (3), wherein the composite material fibers are fixedly connected to the inside of the matrix (3), wherein the composite material fibers comprise a plurality of steel fiber strands (1) and a plurality of GFRP strands (2), wherein the outer surface of each of the GFRP strands (2) is fixedly connected with an alkali-resistant coating (4), wherein the plurality of steel fiber strands (1) are divided into two rows, and the plurality of GFRP strands (2) are divided into three rows, and each row of steel fiber strands (1) is placed between two corresponding rows of GFRP strands (2).

2. The cement mortar glass fiber cloth according to claim 1, characterized in that: Each row of the GFRP bundles (2) and each row of the steel fiber filaments (1) are arranged alternately and in parallel inside the matrix (3).

3. The cement mortar glass fiber cloth according to claim 2, characterized in that: The substrate (3) is made of flexible vinyl ester resin.

4. The cement mortar glass fiber cloth according to claim 3, characterized in that: The alkali-resistant coating (4) is a sulphoaluminate cement mortar coating.

5. The cement mortar glass fiber cloth according to claim 4, characterized in that: The outer surface of each GFRP bundle (2) is wound with a thread-shaped fiber bundle.

6. The cement mortar glass fiber cloth according to claim 5, characterized in that: The outer surface of each GFRP bundle (2) is surface anisotropic.

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