WO2019214155A1

WO2019214155A1 - Trc foldable permanent formwork capable of being assembled and method for manufacturing same

Info

Publication number: WO2019214155A1
Application number: PCT/CN2018/109266
Authority: WO
Inventors: 尹世平; 李世昌; 王菲; 王聪聪
Original assignee: 中国矿业大学
Priority date: 2018-05-07
Filing date: 2018-10-08
Publication date: 2019-11-14
Also published as: AU2018408668B2; CN108590164A; AU2018408668A1; CA3050897A1; CN108590164B; RU2736929C1; CA3050897C

Abstract

Disclosed are a TRC foldable permanent formwork capable of being assembled and a method for manufacturing same. The TRC foldable permanent formwork capable of being assembled comprises a fiber woven mesh (1), an FRP rib hook (2) and a plurality of dies (3). The plurality of dies (3) are arranged at intervals and fixed to the fiber woven mesh (1), and the distance between the plurality of dies (3) arranged at intervals is the distance by which a right angle can be formed between a die (3) and a die (3) which are folded; each die (3) is filled with high-performance fine concrete for reinforcing the fiber woven mesh (1); and when the dies (3) are assembled to form a permanent formwork, the fiber woven mesh (1) forms a continuous whole. The fiber woven mesh (1) in the permanent formwork can fully exert a hoop effect; the fiber woven mesh (1) works together with the FRP rib hook (2) at the joint to ensure the strength and durability of the joint; and the permanent formwork can be placed in a folded form, and has a high operability.

Description

TRC folding type assembling permanent template and manufacturing method thereof

Technical field

The invention relates to a permanent template and a manufacturing method thereof, in particular to a novel TRC folding type assembleable permanent template suitable for industrial and civil building structures, hydraulic structures and harbor structures, and a manufacturing method thereof. Concrete construction technology.

Background technique

In the domestic construction field, most of the currently used templates are wood formwork, steel formwork, etc., which cannot be reused many times, and have large consumption of resources, and there are also disadvantages such as inconvenience in disassembly and assembly, high turnover costs, and labor and time. In addition, after the formwork is removed, the surface of the ordinary concrete in the building structure is naturally exposed and the durability is low.

With the continuous innovation of fiber material technology, a new type of TRC permanent template has emerged. TRC (Textile Reinforced Concrete) is a new type of high performance cement-based composite material. It is a combination of multi-axial fiber fabric mesh and high-performance fine concrete. It has high strength, corrosion resistance and strong plasticity. . The TRC permanent template has a good development prospect. On the one hand, the template is light in weight, easy to construct, and is combined with the cast-in-place concrete after construction to form a solid whole, forming a theoretical "hoop effect" and improving the mechanics of the member. Performance; on the other hand, the high-performance fine concrete used in combination with the fiber woven mesh, after casting, can be used as part of the component to bear the load, improve structural durability and control crack development, reduce structural maintenance costs and eventually extend The service life of the structure.

At present, the TRC permanent template applied to the actual project still has the following disadvantages: the connection problem of assembling the permanent template, there is still strength loss at the joint; the bonding property between the permanent template and the cast-in-place concrete needs further improvement, and peeling occurs. Abnormal phenomena such as empty drums; the template assembly form is single and cannot be flexibly changed according to actual engineering needs.

Summary of the invention

Technical Problem: The object of the present invention is to overcome the deficiencies in the prior art, and to provide a TRC folding type assembleable permanent template which has a simple structure, can be repeatedly disassembled, is flexible to use, and has strong maneuverability, and a manufacturing method thereof.

Technical Solution: The TRC folding type assembled permanent template of the present invention comprises a fiber woven mesh, an FRP rib hook and a plurality of dies; the plurality of dies are arranged at intervals on the fiber woven mesh, and the distances of the plurality of dies are arranged at intervals The mold and the mold can be folded into a right angle, each mold is filled with high-performance fine concrete with a reinforced fiber woven mesh, and the ends of the FRP rib hook are symmetrically fixed at the upper and lower ends of the mold and the mold, respectively. When the mold is folded into a right angle, the hook connection increases the strength of the solid fiber woven mesh, thereby enhancing the folding to assemble the permanent template integrity and avoiding cracking at the assembly.

The mold is formed by fastening an inner layer template and an outer layer template, and the inner layer template is provided with a plurality of vertical strip-shaped ribs.

The inner layer template and the outer layer template are made of PVC plastic board or fiber board.

The method for manufacturing the above TRC folding type assembling permanent template comprises the following steps:

a. making a plurality of molds according to the size of the injection mold, and cutting the relative height of the fiber woven mesh according to the height of the mold. The length of the fiber woven mesh is determined according to the width and spacing distance of the plurality of molds, and the outer plates of the plurality of molds are separated by a distance. Arranged, and then attached the cut fiber woven mesh to the outer template of the interval arrangement, and then evenly apply the configured epoxy resin coating on the fiber woven net attached to the mold position, and the whole process of coating Be careful not to have an epoxy resin knot or a fiber bundle leaking brush;

b. sandblasting with silica sand before the epoxy coating liquid is uncured to increase the bonding performance of the fiber woven mesh and the high performance fine concrete;

d. The fiber woven mesh after sandblasting is suspended and placed in a cool and ventilated room to be air-dried, and then the dried fiber woven mesh is placed in the middle position of the mold;

e. Stand up the mold, pour high-performance fine concrete into the mold, and pat the surface of the mold by hand or slightly vibrate when pouring to 1/4 of the height of the mold, repeating multiple times to drive out the bubbles in the mold base to enhance High-performance fine concrete compactness, the fiber woven mesh between adjacent molds is not poured;

f. After the pouring is completed, the curing is carried out in a humid environment; after the completion of the maintenance, in order to prevent damage to the TRC folding type, the permanent template can be assembled, and when the TRC folding type can be assembled into a permanent template to achieve sufficient strength, the demolition is performed again. mold.

When the high-performance fine concrete is poured into the mold, the position of the fiber woven mesh is prevented from being moved by the impact of the high-performance fine concrete during the pouring process, and a thin plate is placed between the molds, and the fiber woven mesh is attached to the thin plate. Above, gradually withdraw during the pouring process.

When assembling the beam formwork, the molds are three, and the outer two templates do not leave the fiber woven mesh for lap joint; when assembling the column formwork, the mold is four, and the outer two templates (3) are left overlapped. Fiber woven mesh.

The preparation process of the epoxy resin coating liquid: in order to avoid direct sunlight and wind blowing, the whole stirring process is carried out in a closed chamber, and the epoxy resin, the curing agent and the diluent are mixed and stirred in a ratio of 1:1:0.5, and the mixture is stirred. Mix well.

Advantageous Effects: Since the above technical solution is adopted, the TRC folding type assembling permanent template of the present invention is folded and assembled by TRC permanent templates one by one. Compared with the prior art, it has the following advantages:

(1) When assembling into a permanent template, the fiber woven mesh is in a continuous whole, without interruption, so that it fully exerts the hoop effect;

(2) The fiber woven mesh at the joint works with the FRP rib hook to ensure that the strength and durability of the joint is not lower than the integral permanent template;

(3) At the construction site, it can be assembled into the required beam, plate and column formwork. The inner surface of the mold is provided with grooves to improve the bonding performance with cast-in-place concrete. It can be designed and produced according to the actual size requirements in the factory. It can be folded and placed after production, which is more flexible and changeable. In the field construction, the folding formwork can be arbitrarily combined to complete the assembly of the required permanent beams of the beam, the plate and the column, and the non-shrinkage cement grout is used for bonding and filling at the assembling edge.

The template assembly technology is novel, simple to manufacture, convenient to use, strong in maneuverability, improved in structural durability and longevity, and has wide practicality.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 is a structural view of the TRC folding type assembleable permanent template of the present invention after unfolding;

2 is a schematic view showing the structure of the FRP rib hook of the present invention;

Figure 3 is a schematic view showing the structure of the inner layer plate of the mold of the present invention;

4 is a schematic structural view of an example of a TRC folding permanent assembly column template of the present invention;

Fig. 5 is a structural schematic view showing the second example of the TRC folding permanent assembling beam template of the present invention.

In the figure: 1-fiber woven mesh, 2-FRP rib hook, 3-mold.

detailed description

The invention will be further described below with reference to the embodiments in the drawings:

As shown in FIG. 1, the TRC folding type assembled permanent template of the present invention is mainly composed of a fiber woven mesh 1, an FRP rib hook 2 and a plurality of dies 3; the plurality of dies 3 are arranged at intervals in a fiber woven mesh. 1 , the mold 3 is formed by the inner layer template and the outer layer template, the junction is connected by a gas nail gun, and the inner layer template is provided with a plurality of vertical strip-shaped ribs, as shown in FIG. 3 . The inner layer template and the outer layer template are made of PVC plastic board or fiber board. The distance between the plurality of molds 3 is such that the distance between the mold and the mold can be folded into a right angle, and each mold is filled with high-performance fine concrete of the reinforcing fiber woven mesh 1, and the FRP rib hook 2 is as shown in FIG. The ends of the FRP rib hooks 2 are symmetrically fixed at the upper and lower ends of the mold and the mold respectively, and the hooking connection increases the strength of the solid fiber woven mesh 1 when the mold 3 is folded into a right angle, thereby enhancing the folding and assembling the permanent template as a whole. Sex, avoid rupture at the assembly.

The implementation method of the above TRC folding type assembling permanent template is as follows:

a. making a plurality of molds 3 according to the injection mold size, and cutting the relative height of the fiber woven mesh 1 according to the height of the mold 3, the length of the fiber woven mesh 1 is determined according to the width and the separation distance of the plurality of molds 3, and the plurality of molds 3 are The outer plates are arranged at a distance, and then the cut fiber woven mesh is attached to the outer template of the interval arrangement, and then the configured epoxy coating is evenly applied by a brush to the fiber woven at the position of the mold. On the Internet, the entire process of coating liquid should be careful not to have epoxy resin knots or fiber bundles leaking brush; the epoxy resin coating liquid is made in order to avoid direct sunlight and wind blowing, the whole stirring process is carried out in a closed chamber, and the epoxy is The resin, curing agent and diluent are mixed and stirred in a ratio of 1:1:0.5, and they are thoroughly mixed.

d. The fiber woven mesh after sandblasting is suspended in a cool and ventilated room to be air-dried, and then the dried fiber woven mesh is placed in the middle position of the mold 3, and the ends of the FRP rib hook 2 are respectively The symmetry is fixed at the upper and lower ends of the mold and the mold, and is hooked together when assembling. The purpose is to cooperate with the fiber woven mesh during assembly to strengthen the strength of the joint and enhance the integrity of the foldable permanent template. Break at the assembly and give full play to the “hoop effect” of the permanent template of the TRC;

e. Stand up the mold 3, and cast high-performance fine concrete into the mold 3. When the height is 1/4 of the mold height, the surface of the mold is patted by hand or slightly vibrated, and repeated many times to drive out the bubbles in the mold base. In order to enhance the compactness of high-performance fine concrete, the fiber woven mesh between adjacent molds is not poured; when high-performance fine concrete is poured into the mold 3, the position of the fiber woven mesh is prevented from being subjected to high-performance fine concrete during the pouring process. Moves by impact, puts a thin plate between the molds, attaches the fiber woven mesh to the thin plate, and gradually withdraws during the pouring process; in order to prevent the lateral deformation of the mold during the casting of high-performance fine concrete, set outside the mold Lateral support.

f. After the pouring is completed, the curing is carried out in a humid environment, and the TRC folding type can be assembled to assemble the permanent template to the age; after the completion of the maintenance, in order to prevent the damage of the TRC folding type, the permanent template can be assembled in the TRC folding type. When the permanent template is assembled to achieve sufficient strength, the mold is removed.

The fiber woven mesh 1 is woven with two kinds of fibers in the radial direction and the weft direction of the woven fabric, and is woven by fibers with high tensile strength and good corrosion resistance, such as carbon fiber and aramid fiber. , alkali-resistant glass fiber, basalt fiber, polyvinyl alcohol fiber or polyethylene fiber.

The high-performance fine concrete is made by mixing 52.5 Portland cement, grade I fly ash, silica sand with particle size of 0-0.6 mm, water, Sika three-generation water reducer, and chopped fiber material. Its production method:

1 Required materials: 52.5 Portland cement 500kg/m ³ , Grade I fly ash 180kg/m ³ , Silica fume 40kg/m ³ , Silica sand with particle size 0～0.6mm 800kg/m ³ , Particle size 0.6～1.2 Mm of silica sand 400kg / m ³ , water 252kg / m ³ , Sika three generations of water reducing agent 4.0kg / m ³ , accounting for 0.5-2% of the total volume of chopped fibers.

2 Stirring: After preparing the required materials, stir the cement, Class I fly ash, silica fume and silica sand with a mixer for 2-3 minutes, stir evenly, add water and stir, then add Sika three generations of water reducing agent for 2-3 minutes. . In order to enhance the ductility and crack resistance of the matrix, and to make the cracks develop fine and dense development characteristics, the short-cut fibers can be continuously mixed, and then stirred for 3-5 minutes to finally form high-performance fine concrete.

The above-mentioned chopped fibers: polyvinyl alcohol fibers having flexibility and high water absorption, polyethylene fibers having high strength and corrosion resistance, carbon fibers having high tensile properties, and resistance to high temperature and alkali corrosion resistance Alkali glass fiber, basalt fiber having high strength and high temperature resistance, or one or more of polypropylene fiber having high strength and good electrical insulation.

The high-performance fine concrete: ensuring that the concrete penetrates sufficiently through the fiber woven mesh to form a good bond with it; the self-compacting ability with high fluidity and non-segregation; the corrosion effect on the fiber woven mesh is within an acceptable range.

The purpose of impregnation with epoxy coating liquid is as follows: 1 The surface of the fiber woven mesh is hardened, and the fiber woven mesh is condensed into a whole by a loose individual fiber bundle to reduce the slip between the fiber bundles in the fiber bundle. 2 Improve the interfacial adhesion properties of fiber woven mesh and high performance fine concrete. 3 Forming a protective layer on the surface of the fiber woven mesh to effectively avoid the erosion of the lye on the fiber woven mesh in the concrete.

As shown in Fig. 4, an example of a permanent assembly column template. When assembling a column template, there are four molds 3, and the outer two templates 3 have overlapping fiber woven nets as lap joints.

As shown in FIG. 5, the permanent assembly column template example 2, when assembling the beam template, the template 3 is three, and the outer two templates 3 do not leave the fiber woven mesh for lap joint.

Claims

A TRC folding type assembling permanent template, characterized in that it comprises a fiber woven mesh (1), an FRP rib hook (2) and a plurality of dies (3); the plurality of dies (3) are arranged at intervals On the fiber woven mesh (1), the distance between the plurality of molds (3) is such that the distance between the mold and the mold can be folded at right angles, and each mold is filled with high-performance fine concrete with a reinforced fiber woven mesh (1). The ends of the FRP rib hooks (2) are symmetrically fixed at the upper and lower ends of the mold and the mold, respectively, and the hooking connection increases the strength of the solid fiber woven mesh (1) when the mold (3) is folded into a right angle. Enhanced folding can be used to assemble permanent formwork integrity and avoid rupture at the assembly.
The TRC folding type assembleable permanent template according to claim 1, wherein the mold (3) is formed by fastening an inner layer template and an outer layer template, and the inner layer template is provided with a plurality of strips. Vertical strip ribs.
A TRC folding formable permanent template according to claim 1, wherein the inner layer template and the outer layer template are made of a PVC plastic board or a fiber board.
A method for fabricating a TRC folding formable permanent template according to claim 1, comprising the steps of:

a. making a plurality of molds (3) according to the size of the injection mold, and cutting the relative height of the fiber woven mesh (1) according to the height of the mold (3), the length of the fiber woven mesh (1) according to the width of the plurality of molds (3) And the separation distance is determined, the outer plates of the plurality of molds (3) are arranged at a distance, and then the cut fiber woven mesh is attached to the spaced outer layer template, and then the configured epoxy resin is coated with a brush. The liquid is evenly applied to the fiber woven net attached to the position of the mold, and the entire process of the coating liquid should be careful not to cause epoxy resin formation or fiber bundle leakage brush;

b. sandblasting with silica sand before the epoxy coating liquid is uncured to increase the bonding performance of the fiber woven mesh and the high performance fine concrete;

d. The fiber woven mesh after sandblasting is suspended in a cool and ventilated room to be air-dried, and then the dried fiber woven mesh is placed in the middle position of the mold (3);

e. Stand up the mold (3), pour high-performance fine concrete into the mold (3), and pat the mold surface or slightly vibrate by hand when pouring to 1/4 of the height of the mold, repeating the mold base Bubbles in order to enhance the compactness of high-performance fine concrete, the fiber woven mesh between adjacent molds is not poured;

f. After the pouring is completed, the curing is carried out in a humid environment; after the completion of the maintenance, in order to prevent damage to the TRC folding type, the permanent template can be assembled, and when the TRC folding type can be assembled into a permanent template to achieve sufficient strength, the demolition is performed again. mold.
The TRC folding type assembling permanent template manufacturing method according to claim 4, wherein when the high-performance fine concrete is poured into the mold (3), the position of the fiber woven mesh is prevented from being high during the pouring process. The fine concrete is moved by the impact of the fine concrete, a thin plate is placed between the molds, and the fiber woven mesh is attached to the thin plate, and is gradually pulled away during the pouring process.
The TRC folding type assembling permanent template manufacturing method according to claim 4, wherein when the beam template is assembled, the molds (3) are three, and the outer two templates (3) are not overlapped. Fiber woven mesh; when assembling the column template, there are 4 molds (3), and the outer two templates (3) are left with lapped fiber woven mesh.
The TRC folding type assembleable permanent template manufacturing method according to claim 4, wherein the epoxy resin coating liquid is produced in the process of avoiding direct sunlight and wind blowing, and the whole stirring process is carried out in a closed chamber, and the ring is The oxygen resin, the curing agent and the diluent are mixed and stirred in a ratio of 1:1:0.5, and they are thoroughly mixed.