GFRP mesh reinforced cement-based fabricated truss floor support plate

Abstract

The utility model discloses a GFRP mesh reinforced cement-based assembly type truss floor support plate which comprises a truss and a concrete bottom plate, the bottom of the truss is fixed in the concrete bottom plate, a GFRP mesh is arranged in the concrete bottom plate, and the GFRP mesh is fixedly connected with the bottom of the truss. According to the GFRP mesh reinforced cement-based assembly type truss floor support plate, the GFRP mesh serves as a reinforcing rib in the concrete bottom plate, the strength of the concrete bottom plate can be improved, the surface of the GFRP mesh has large wrapping gripping force on concrete, fine cracks are not prone to being generated on the surface of the concrete bottom plate, the concrete bottom plate is more convenient to maintain, and the service life of the GFRP mesh is prolonged. The GFRP meshes are arranged at the bottom of the concrete bottom plate, so that a carbon fiber net or a glass fiber net does not need to be arranged at the bottom of the concrete bottom plate, cost is reduced, the overall weight is reduced due to the fact that the overall density of the GFRP meshes is small, and transportation cost and building load bearing are reduced to a certain degree.

Description

Technical Field

[0001] The utility model belongs to the technical field of building materials, in particular to a GFRP mesh reinforced cement-based assembled truss floor deck. Background Art

[0002] Existing prefabricated truss floor decks generally include steel trusses, a base plate, and a steel mesh. The base plate is generally a thin concrete plate, and the bottom of the steel trusses is cast and fixed in the base plate. In order to increase the strength and crack resistance of the base plate, a steel mesh fixed to the bottom of the steel trusses is generally provided in the base plate. The mesh is generally welded together by multiple steel bars evenly distributed horizontally and multiple steel bars evenly distributed vertically. The welding process is expensive and prone to poor welding. The steel mesh itself has a high density and high transportation cost. The concrete precast parts made from it are heavy, which increases the transportation cost and the building load-bearing capacity. Because the base plate is a thin concrete slab and the steel bar surface is relatively smooth, the wrapping and gripping force on the concrete is insufficient. If the thin concrete slab is not properly maintained, a grid-like pattern consistent with the shape of the steel mesh will form on its surface. In fact, small cracks distributed in the same shape as the steel mesh will form, resulting in certain safety hazards in the thin concrete slab. To prevent the formation of such grid-like cracks, CN219638208U discloses an assembled composite fiber mesh reinforced steel truss composite slab. The bottom surface of the slab has a reinforcing anti-cracking layer made of a carbon fiber mesh or a glass fiber mesh. The carbon fiber mesh or glass fiber mesh prevents the formation of grid-like cracks. However, the combined use of steel mesh and carbon fiber mesh or glass fiber mesh undoubtedly increases production costs. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the utility model provides a GFRP mesh reinforced cement-based prefabricated truss floor deck. This GFRP mesh reinforced cement-based prefabricated truss floor deck can not only reduce the overall weight of the prefabricated truss floor deck, but also avoid the generation of grid-like cracks on the bottom plate, while reducing production costs.

[0004] In order to solve the above technical problems, the present invention solves them through the following technical solutions: a GFRP mesh reinforced cement-based prefabricated truss floor deck, comprising a truss and a concrete base plate, wherein the base of the truss is fixed within the concrete base plate, and a GFRP mesh is provided within the concrete base plate, wherein the GFRP mesh is fixedly connected to the base of the truss. This GFRP mesh reinforced cement-based prefabricated truss floor deck uses the GFRP mesh as reinforcement within the concrete base plate, which not only improves the strength of the concrete base plate, but also provides a greater wrapping and gripping force on the concrete on the surface of the GFRP mesh, making it less prone to fine cracks on the surface of the concrete base plate and more convenient to maintain. Therefore, there is no need to install a carbon fiber mesh or glass fiber mesh on the bottom of the concrete base plate, thereby reducing costs. Moreover, due to the low overall density of the GFRP mesh, the overall weight is reduced, and transportation costs and building load-bearing capacity are also reduced to a certain extent.

[0005] In the above technical solution, preferably, the GFRP mesh includes a plurality of longitudinal rods arranged side by side in the longitudinal direction and a plurality of transverse rods arranged side by side in the transverse direction. The longitudinal rods are formed by twisting and solidifying at least two impregnated glass fiber bundles. The transverse rods are GFRP rods that pass through and are fixed to the plurality of longitudinal rods. The plurality of longitudinal rods and the plurality of transverse rods form a mesh. This GFRP mesh uses GFRP rods as transverse rods and impregnated glass fiber bundles twisted and solidified as longitudinal rods. Since the entire material is glass fiber bundles and impregnated with glue, the overall density is reduced, and transportation costs and building load-bearing capacity are also reduced to a certain extent. In addition, the surfaces of the GFRP rods and the impregnated glass fiber bundles both have a strong gripping force on concrete. In particular, the groove-like portion formed between the surfaces of the twisted impregnated glass fiber bundles further enhances their gripping force on concrete and further prevents cracks in the concrete base plate.

[0006] In the above technical solution, preferably, the transverse rod passes through the twisted gap between at least two strands of impregnated glass fiber bundles and is cured. This structure makes the transverse rod more reliably fixed and easy to process.

[0007] In the above technical solution, preferably, the impregnated glass fiber bundles are twisted in opposite directions on either side of each transverse rod. This structure facilitates processing, as the capstan can be reversed and reset after each transverse rod insertion when twisting the impregnated glass fiber bundles. It also prevents the GFRP mesh from exerting a unilateral deflection force on the entire mesh.

[0008] In the above technical solution, preferably, through holes are formed between the two sides of the transverse rod and the impregnated glass fiber bundle. By forming the through holes, concrete can penetrate during concrete pouring, further improving its wrapping and gripping power on the concrete.

[0009] In the above technical solution, preferably, the surface of the transverse rod is spirally wound with raised winding ribs. This structure is used to improve the wrapping and gripping force of the transverse rod surface on concrete.

[0010] In the above technical solution, preferably, the surface of the transverse rod is printed with a concave-convex texture. This structure is used to improve the wrapping and gripping force of the transverse rod surface on concrete.

[0011] In the above technical solution, preferably, the longitudinal rods are evenly distributed, the transverse rods are evenly distributed, and 5 cm x 5 cm square holes are formed between the transverse rods and the longitudinal rods. The use of 5 cm x 5 cm square holes can ensure sufficient strength of the GFRP mesh and allow gravel in the concrete to pass through the mesh holes, thus preventing concrete delamination.

[0012] In the above technical solution, preferably, the truss includes an upper chord and two lower chords distributed in a triangular shape, and the two side surfaces of the upper chord and the two lower chords are connected and fixed by welded side positioning ribs, and the bottom of the lower chord and / or the side positioning ribs is located in the concrete base plate.

[0013] In the above technical solution, preferably, the side positioning ribs are bent into a wave shape, the top of the side positioning ribs are welded and fixed to the upper chord ribs, the side surfaces of the side positioning ribs are welded and fixed to the lower chord ribs, and the two side positioning ribs are located below the lower chord ribs and are folded back and forth to form positioning feet.

[0014] Compared with the prior art, the present invention has the following beneficial effects: this GFRP mesh reinforced cement-based assembled truss floor deck uses the GFRP mesh as the reinforcement bar in the concrete base plate, which can not only improve the strength of the concrete base plate, but also the surface of the GFRP mesh has a greater wrapping and gripping force on the concrete, the surface of the concrete base plate is not prone to small cracks, and the maintenance of the concrete base plate is also more convenient. Therefore, there is no need to install a carbon fiber mesh or a glass fiber mesh at the bottom of the concrete base plate, thereby reducing costs. In addition, since the overall density of the GFRP mesh is relatively low, the overall weight is reduced, and the transportation cost and the building load-bearing capacity are reduced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic cross-sectional view of Example 1 of the present invention.

[0016] Figure 2 This is a schematic diagram of the truss in Example 1 of the present invention.

[0017] Figure 3 This is a schematic cross-sectional view of Example 2 of the present utility model.

[0018] Figure 4Schematic diagram of the structure of the GFRP mesh in Example 1 or 2 of the present invention.

[0019] Figure 5 Schematic diagram of the processing of the GFRP mesh in Example 1 or 2 of the present invention.

[0020] Figure 6 This is a schematic structural diagram of another GFRP mesh in Example 1 or 2 of the present invention. DETAILED DESCRIPTION

[0021] The present invention is described in further detail below with reference to the accompanying drawings and specific embodiments: Figure 1 、 Figure 2 as well as Figures 4 to 6 In Example 1, a GFRP mesh-reinforced cement-based prefabricated truss floor deck is described, comprising a truss 100 and a concrete base plate 200. The bottom of the truss 100 is fixed within the concrete base plate 200, and a GFRP mesh 300 is disposed within the concrete base plate 200 and fixedly connected to the bottom of the truss 100. This GFRP mesh-reinforced cement-based prefabricated truss floor deck utilizes the GFRP mesh 300 as reinforcement within the concrete base plate, thereby enhancing the strength of the concrete base plate 200. Furthermore, the surface of the GFRP mesh 300 provides a strong grip on the concrete, making the surface of the concrete base plate 200 less susceptible to fine cracks. This also makes maintenance of the concrete base plate 200 easier, eliminating the need for a carbon fiber mesh or glass fiber mesh on the bottom of the concrete base plate 200, thereby reducing costs. Furthermore, the low overall density of the GFRP mesh 300 reduces the overall weight, thus reducing transportation costs and the building's load-bearing capacity.

[0022] The GFRP mesh 300 comprises a plurality of longitudinal rods 1 arranged side by side in a longitudinal direction and a plurality of transverse rods 2 arranged side by side in a transverse direction. The longitudinal rods 1 are formed by twisting and curing two impregnated glass fiber bundles 11. The transverse rods 2 are GFRP rods that pass through and are fixed to the longitudinal rods 1. The plurality of longitudinal rods 1 and the transverse rods 2 form a mesh. Of course, in other embodiments, the longitudinal rods 1 can also be formed by twisting and curing more than two impregnated glass fiber bundles 11. The GFRP rods are formed by twisting and curing glass fiber bundles impregnated with glue. The glue used during the processing of the longitudinal rods 1 and the transverse rods 2 is one or more materials such as unsaturated polyester, epoxy resin, and phenolic resin. This GFRP mesh-reinforced cement-based prefabricated truss floor deck is composed of GFRP rods as transverse rods 2 and longitudinal rods 1 made of impregnated glass fiber bundles twisted and cured. Because the entire structure is made of glass fiber bundles and impregnated with glue, the overall density is reduced, which reduces transportation costs and building load-bearing capacity to a certain extent. Furthermore, both the surfaces of the GFRP rods and the surfaces of the impregnated glass fiber bundles 11 have a strong grip on the concrete. In particular, grooves 12 are formed between the surfaces of the twisted impregnated glass fiber bundles 11, further enhancing their grip on the concrete and preventing cracks in the concrete base 200. It will be readily understood by those skilled in the art that the longitudinal rods 1 and transverse rods 2 of the GFRP mesh are staggered, but are not necessarily strictly perpendicular to each other. Parallelogram-shaped holes are formed between the longitudinal rods 1 and the transverse rods 2. The parallelograms can be prismatic, square, or rectangular.

[0023] In this embodiment, the transverse rod 2 passes through and solidifies in the twisted gap between at least two strands of impregnated glass fiber bundles 11. This structure makes the transverse rod 2 more reliably fixed and easy to process.

[0024] In this embodiment, the impregnated glass fiber bundles 11 are twisted in opposite directions on either side of each transverse rod 2. This structure facilitates processing, as the capstan can be reversed and reset after each insertion into the transverse rod 2. It also prevents the GFRP mesh from experiencing a unilateral deflection force.

[0025] In this embodiment, through holes 3 are formed between the two sides of the transverse rod 2 and the impregnated glass fiber bundle 11. By forming the through holes 3, concrete can be penetrated during concrete pouring, further improving its wrapping and gripping power on the concrete.

[0026] In this embodiment, the surface of the transverse rod 2 is spirally wound with raised ribs 21 to enhance its grip on the concrete. Before the glue on the surface of the transverse rod 2 is completely cured, it is fused together by spirally wrapping a bundle of impregnated glass fiber bundles around the outside, and then oven-dried and cured.

[0027] See also Figure 6Another transverse bar 2 is provided. This transverse bar 2 has a different surface shape and is printed with a concave-convex texture 22 to enhance its grip on concrete. The concave-convex texture 22 is printed on the surface of the transverse bar 2 before the glue on the surface is completely cured by rolling, and then cured in an oven.

[0028] In this embodiment, the longitudinal rods 1 and transverse rods 2 are evenly distributed, and 5 cm x 5 cm square holes are formed between the transverse rods 2 and the longitudinal rods 1. The square holes formed between the longitudinal rods 1 and the transverse rods 2 allow the stones in the concrete to pass through. If the square holes are too small, the stones and cement in the concrete will separate, affecting the quality of the concrete pouring. If the square holes are too large, the overall strength will be insufficient.

[0029] It should be noted that the longitudinal rod 1 in the figure is twisted into a twist shape, but in the actual processing process, due to the flow of glue adhering to the surface of the glass fiber bundle and the different number of twisting turns, it does not completely present a twist shape.

[0030] Truss 100 includes an upper chord 101 and two lower chords 102 arranged in a triangular pattern. The sides of upper chord 101 and lower chords 102 are connected and secured by welded side locating ribs 103. The bottoms of lower chord 102 and side locating ribs 103 are located within concrete base 200. Locating the bottoms of lower chord 102 and side locating ribs 103 within concrete base 200 further enhances support strength.

[0031] The side positioning ribs 103 are bent into a wave shape. The top of the side positioning ribs 103 is welded to the upper chord rib 101, and the side of the side positioning ribs 103 is welded to the lower chord rib 102. The two side positioning ribs 103 are located below the lower chord rib 102 and folded outward to form positioning feet 104. The positioning feet 104 are used to fix the GFRP mesh 300 with wire ties.

[0032] See also Figures 3 to 6 , Example 2, the difference between Example 2 and Example 1 is that the lower chord reinforcement 102 is located outside the concrete base plate 200, and only the bottom of the side positioning reinforcement 103 is located inside the concrete base plate 200.

[0033] The GFRP mesh processing method in the above two embodiments includes the following steps: 1) impregnating several groups of parallel glass fiber bundles, straightening them, and moving them axially; 2) using a twisting machine to twist each group of glass fiber bundles to form longitudinal rods; 3) inserting GFRP rods longitudinally between the glass fiber bundles at intervals as transverse rods during the twisting and moving process of the glass fiber bundles, and clamping and securing the transverse rods within the glass fiber bundles through the twisting of the glass fiber bundles; 4) drying in a drying oven to form a GFRP mesh-reinforced cement-based prefabricated truss floor deck. This GFRP mesh processing method can continuously process and produce GFRP mesh, effectively improving production efficiency. Furthermore, the GFRP has a strong gripping force on concrete, making it less likely to produce fine cracks on the surface of the concrete slab when used to cast thin concrete slabs. Thin concrete slabs are also more convenient to maintain. In particular, the grooves 12 formed between the surfaces of the twisted impregnated glass fiber bundles 11 further enhance its gripping force on concrete.

[0034] In this embodiment, there are two bundles of glass fibers twisted together to form the longitudinal rod.

[0035] In this embodiment, the twisting direction of the twisting machine is reversed after each GFRP rod is inserted. This method allows the twisting machine to reverse and reset after each GFRP rod is inserted, thereby preventing the GFRP mesh reinforced cement-based prefabricated truss floor deck from having a deflection force toward one side.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A GFRP mesh reinforced cement-based assembled truss floor deck, comprising a truss (100) and a concrete base plate (200), wherein the bottom of the truss (100) is fixed in the concrete base plate (200), and is characterized in that: A GFRP mesh (300) is provided in the concrete base plate (200), the GFRP mesh (300) being fixedly connected to the bottom of the truss (100), the GFRP mesh (300) comprising a plurality of longitudinal rods (1) arranged side by side in the longitudinal direction and a plurality of transverse rods (2) arranged side by side in the transverse direction, the longitudinal rods (1) being formed by twisting at least two impregnated glass fiber bundles (11) and then curing, the transverse rods (2) being GFRP rods passing through and fixed to the plurality of longitudinal rods (1), the plurality of longitudinal rods (1) and the plurality of transverse rods (2) forming a mesh.

2. The GFRP mesh reinforced cement-based assembled truss floor deck according to claim 1, characterized in that: The transverse rod (2) passes through the twisted gap between at least two impregnated glass fiber bundles (11) and is cured.

3. A GFRP mesh reinforced cement-based assembled truss floor deck according to claim 1 or 2, characterized in that: The impregnated glass fiber bundles (11) are located on both sides of each transverse rod (2) and have opposite twisting directions.

4. The GFRP mesh reinforced cement-based assembled truss floor deck according to claim 2, characterized in that: Through holes (3) are formed between the two sides of the transverse rod (2) and the impregnated glass fiber bundle (11).

5. The GFRP mesh reinforced cement-based assembled truss floor deck according to claim 1, characterized in that: The surface of the transverse rod (2) is spirally wound with raised winding ribs (21).

6. The GFRP mesh reinforced cement-based assembled truss floor deck according to claim 1, characterized in that: The surface of the transverse rod (2) is printed with a concave-convex texture (22).

7. The GFRP mesh reinforced cement-based assembled truss floor deck according to claim 1, characterized in that: The longitudinal bars (1) are evenly distributed, the transverse bars (2) are evenly distributed, and square holes of 5 cm×5 cm are formed between a plurality of the transverse bars (2) and a plurality of the longitudinal bars (1).

8. The GFRP mesh reinforced cement-based assembled truss floor deck according to claim 1, characterized in that: The truss (100) comprises an upper chord (101) and two lower chords (102) distributed in a triangular shape, the two side surfaces of the upper chord (101) and the two lower chords (102) being connected and fixed by welded side positioning ribs (103), and the bottom of the lower chord (102) and / or the side positioning ribs (103) being located within the concrete base plate (200).

9. The GFRP mesh reinforced cement-based assembled truss floor deck according to claim 8, characterized in that: The side positioning ribs (103) are bent into a wave shape, the top of the side positioning ribs (103) is welded and fixed to the upper chord rib (101), and the side of the side positioning ribs (103) is welded and fixed to the lower chord rib (102), and the two side positioning ribs (103) are located below the lower chord rib (102) and are folded outwards in opposite directions to form positioning feet (104).

Images