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Plywood for panel of as-cast-finish concrete building template

A technology of fair-faced concrete and building formwork, which is applied in the direction of construction, building structure, formwork/formwork components, etc. It can solve the problems of large one-time investment, less turnover times, and heavy weight, and achieve low amortization costs and more turnover times , Durable effect

Inactive Publication Date: 2009-11-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current formwork operation process, commonly used formwork panels include steel plate panels and traditional bamboo (wood) plywood panels, etc. Among them, steel plate panels have disadvantages such as heavy weight, high cost, inconvenient disassembly and assembly, and large one-time investment; while traditional bamboo (wood) Although the one-time investment of plywood panel is small, its deformation is large, the number of turnovers is small, and it is difficult to meet the high standard requirements, so there are big problems in the use of fair-faced concrete or concrete structures with high quality requirements

Method used

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  • Plywood for panel of as-cast-finish concrete building template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] As shown in the accompanying drawing, a kind of plywood for the panel of fair-faced concrete building formwork comprises a film covering 1, a panel 2 and a core board 3, and the thickness of the plywood is 21mm. The film 1 is a phenolic resin laminated film. According to the requirements of wear resistance, the film weight is 100-400g / m2 on the front side of the plywood. 2 , the opposite side is 100~250g / m 2 ; The thickness of the panel 2 is about 1 ~ 5mm, and the panel 2 is formed by gluing the dipped poplar veneer, the dipped adhesive is a low molecular weight water-soluble phenolic resin (PF), and the thickness of the dipped poplar veneer The thickness of the core board 3 is about 2mm. All adjacent veneers in the plywood are laid vertically to each other, and the plywood cross-section follows the principle of symmetrical laying. The whole plywood can be molded at one time using the traditional plywood process. Finally, paint waterproof paint on the four sides of t...

Embodiment 2

[0022] As shown in the accompanying drawing, a kind of plywood for the panel of fair-faced concrete building formwork comprises a film covering 1, a panel 2 and a core board 3, and the thickness of the plywood is 21mm. The film 1 is a phenolic resin laminated film. According to the requirements of wear resistance, the film weight is 100-400g / m2 on the front side of the plywood. 2 , the opposite side is 100~250g / m 2 ; The thickness of the panel 2 is about 1 ~ 5mm, and the panel 2 is formed by gluing the dipped poplar veneer, the dipped adhesive is a low molecular weight water-soluble phenolic resin (PF), and the thickness of the dipped poplar veneer It is about 1 mm; the core board 3 is a masson pine laminated board. All adjacent veneers in the plywood are laid perpendicularly to each other, the direction of the glulam in the core board along the grain is perpendicular to the support direction of the panel in the formwork system, and the principle of symmetrical layering is fo...

Embodiment 3

[0024] As shown in the accompanying drawing, a kind of plywood for the panel of fair-faced concrete building formwork comprises a film covering 1, a panel 2 and a core board 3, and the thickness of the plywood is 21mm. The film 1 is a phenolic resin laminated film. According to the requirements of wear resistance, the film weight is 100-400g / m2 on the front side of the plywood. 2 , the opposite side is 100~250g / m 2 ; The thickness of the panel 2 is about 1 ~ 5mm, and the panel 2 is formed by gluing the dipped poplar veneer, the dipped adhesive is a low molecular weight water-soluble phenolic resin (PF), and the thickness of the dipped poplar veneer about 1 mm; the core board 3 is formed by laying ordinary poplar veneers and dipped poplar veneers alternately, wherein the dipped poplar veneers can be laid every 1 to 3 layers of common poplar veneers. Zhang, the thickness of the veneer in the core board 3 is about 2mm. All adjacent veneers in the plywood are laid vertically to ...

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Abstract

The invention provides a plywood for a panel of an as-cast-finish concrete building template having the advantages of light weight, high strength, easy cutting, high cost performance, weathering resistance, corrosion resistance, good durability, easy demoulding, high turnover frequency, and the suitability for industrialized production. The plywood consists of a covering film, a panel and a core plate, wherein the covering film is prepared by pressing resin; the panel is prepared by gluing a veneer of gum dipping wood or gum dipping fiber reinforced composite material; and the core plate is a common plywood, composite plywood or hybrid plywood. The plywood is mainly applied to the panel in a building template system, particularly the panel of the as-cast-finish concrete building template.

Description

technical field [0001] The invention relates to a plywood for building formwork, which is mainly (but not exclusively) used as a panel in a building formwork system, especially as a clear-faced concrete formwork panel. Background technique [0002] Building formwork is an important tool in the construction of concrete structures. Statistics show that in the construction process of general concrete structures, formwork works account for 20% to 30% of the cost of concrete structure projects, occupy 30% to 40% of the workload, and account for about 50% of the construction period. In the current formwork operation process, commonly used formwork panels include steel plate panels and traditional bamboo (wood) plywood panels, etc. Among them, steel plate panels have disadvantages such as heavy weight, high cost, inconvenient disassembly and assembly, and large one-time investment; while traditional bamboo (wood) Although the one-time investment of the plywood panel is small, its ...

Claims

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Application Information

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IPC IPC(8): E04G9/02
Inventor 刘伟庆岳孔杨会峰方海
Owner NANJING UNIV OF TECH
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