High-strength formwork free of layer separation and method for manufacturing high-strength formwork

Abstract

The invention discloses a high-strength formwork free of layer separation and a method for manufacturing the high-strength formwork. The high-strength formwork and the method have the advantages that the length directions of battens a are consistent with the growth direction of wood, the height directions of battens b are consistent with the growth direction of the wood, accordingly, sufficient adhesive steeping and mechanical bracing effects can be realized, a core is extremely high in mechanical property in the vertical direction and the horizontal direction and is low in deformation, layer separation phenomena inside the machined core can be prevented, the high-strength formwork is high in modulus, and buckling deformation of the formed formwork can be prevented; the mechanical properties of the formwork can be improved by the aid of continuous fiber reinforcement composite surface layers, the high-strength formwork is light, waterproof and anticorrosion, is high in strength and recycling frequency, and can be easily released from forms, the recycling frequency of the high-strength formwork can reach a hundred at least, accordingly, the service life of the building formwork can be greatly prolonged, and the single-service cost can be reduced.

Description

technical field [0001] The invention relates to the field of building templates, in particular to the field of continuous fiber reinforced building templates. Background technique [0002] The formwork used in building construction is steel formwork, wood formwork, bamboo formwork, plastic formwork, etc. Among them, although the steel formwork is strong and has many recycling times, it is expensive, not resistant to corrosion and easy to rust. At the same time, the steel formwork It is heavy, not only inconvenient to transport, but also has great potential safety hazards in the construction process; at present, wood formwork or bamboo formwork is most used in building construction. This type of formwork is light in weight, easy to transport, and its price is cheap, but This type of formwork has low strength, is not resistant to corrosion, is easy to crack after water seepage, and is difficult to remove from the mold. In recent years, in order to solve the defects of the abo...

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Problems solved by technology

[0002] The formwork used in building construction is steel formwork, wood formwork, bamboo formwork, plastic formwork, etc. Among them, although the steel formwork is strong and has many recycling times, it is expensive, not resistant to corrosion and easy to rust. At the same time, the steel formwork It is heavy, not only inconvenient to transport, but also has great potential safety hazards in the construction process; at present, wood formwork or bamboo formwork is most used in building construction. This type of formwork is light in weight, easy to transport, and its price is cheap, but This type of formwork has low strength, is not resistant to corrosion, is easy to crack after water seepage, and is difficult to remove from the mold. The number of recycling times is less than 5 times. In addition, this type of formwork requires a large amount of wood and causes great damage to the environment.

In recent years, in order to solve the defects of the above-mentioned steel molds, wooden molds, and bamboo molds as templates, many new plastic templates have emerged in the industry, such as wood-plastic templates, GMT templates, hollow plastic templates, foamed PVC templates, etc., but these templates The price is expensive, which increases the construction cost, and has the disadvantages of low strength, poor rigidity, easy deformation, poor weather resistance, etc., and the number of cycles is low, and can only be used about 10 times.

[0003] In order to solve the defects caused by the above formwork, patent 201110000869.2 discloses a continuous fiber plastic-coated strip compound reinforced building formwork and its preparation method, which uses wood-oriented strand board as the core, and the surface of the core is continuous with 2~4 layers. The reinforced surface layer made of fiber-coated tape is bonded together by double-sided hot-melt adhesive film to form a reinforced building formwork. One side of the hot-melt adhesive film used is polypropylene resin, and the other side is resin Anhydride-modified polypropylene resin, there are two problems in relying on hot-melt adhesive film to bond the board core and reinforced surface layer: 1. The hot-melt adhesive film is expensive, which greatly increases the construction cost; The glue is generally a thermosetting glue, and the bonding with the hot melt adhesive is not firm. There will be blisters and bulges after long-term use, resulting in a sudden drop in the performance of the template

In addition, since the particle board is a kind of particle board, although it is covered with a fiber-reinforced surface layer, it still has the problem of insufficient rigidity, and delamination will occur in the particle board, resulting in poor strength of the formwork and shortened service life

[0004] Another patent 201310422446.9 discloses a laminated board for building formwork and its manufacturing method. The board core is a common fast-growing wood veneer, wood particle board or density fiber board, and the reinforcing surface layer is a fiber covered with non-woven fabric on one side. Reinforced thermoplastic board, the non-woven fabric on the surface of the reinforced surface layer and the board core are bonded together by glue, and the fiber reinforced thermoplastic board is formed by laying continuous fiber reinforced thermoplastic prepreg and short fiber reinforced thermoplastic prepreg. , if the board core used is fast-growing wood veneer, it needs a large and wide veneer to be processed into a high-rigidity formwork, which is complicated to process and high in cost. If particleboard or density fiberboard is used as the board core, its mechanical strength Insufficient, there is easy delamination in the board core

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