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Pinus kesiya film covering building formwork and manufacture method thereof

A technology of building formwork and Simao pine, which is applied to the on-site preparation of building components, construction, building structure, etc. Demoulding, the effect of small surface adsorption

Active Publication Date: 2015-04-22
普洱市卫国林业局
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing building formwork still has problems such as water absorption deformation, acid and alkali corrosion, non-wear resistance, thin wood layer bonded to the surface of the poured object, surface bonded to concrete, low reuse rate, and large loss.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Cut broad-leaved wood and Simao pine as logs into 1m, 8cm-diameter sections;

[0039](2) Place the wood section in step (1) in water at a temperature of 30°C, heat the water at a rate of 8°C / h to 90°C, heat and cook for 20 hours, and then take out the wood section when the temperature drops to 50°C;

[0040] (3) peeling off the bast and cambium of the wood section gained in step (2); removing bark and knots;

[0041] (4) Rotate the wood section obtained in step (3) around the axis into sheet-like veneers; the surface of the veneer cut by rotary cutting is smooth and flat, with no cracks on the back, straight and neat corners, and uniform thickness. The thickness of the single board is 1.5mm, and the thickness of the single board of the short core board and the long middle board is 2.7mm;

[0042] (5) drying the veneer obtained in step (4) to a moisture content of 12%;

[0043] (6) Mix 8.10 parts by mass of water and 3.55 parts by mass of NH with a mass concentrati...

Embodiment 2

[0055] (1) Cut the Simao pine as a log into 1m or 2m, with a diameter of ≥8cm;

[0056] (2) Place the wood section in step (1) in water with a temperature lower than 40°C, heat the water to 90°C at a rate of 7°C / h, keep it warm for 24 hours, and then take out the wood section when the temperature drops to 50°C ;

[0057] (3) peeling off the bast and cambium of the wood section gained in step (2); removing bark and knots;

[0058] (4) Rotate the wood section obtained in step (3) around the axis into sheet-like veneers; the surface of the veneer cut by rotary cutting is smooth and flat, with no cracks on the back, straight and neat corners, and uniform thickness. The thickness of the single board is 1.48mm, and the thickness of the single board of the short core board and the long middle board is 2.72mm;

[0059] (5) drying the veneer obtained in step (4) to a moisture content of 10%;

[0060] (6) Mix 8.03 parts by mass of water and 3.15 parts by mass of NH with a mass concen...

Embodiment 3

[0072] (1) Cut broad-leaved wood and Simao pine as logs to grow into 2m, diameter grade ≥ 8cm wood segments;

[0073] (2) Place the wood section in step (1) in water with a temperature lower than 40°C, heat the water to 90°C at a rate of 6°C / h, keep it warm for 12 hours, and then take out the wood section when the temperature drops to 50°C ;

[0074] (3) peeling off the bast and cambium of the wood section gained in step (2); removing bark and knots;

[0075] (4) Rotate the wood section obtained in step (3) around the axis into sheet-like veneers; the surface of the veneer cut by rotary cutting is smooth and flat, with no cracks on the back, straight and neat corners, and uniform thickness. The thickness of the single board is 1.52mm, and the thickness of the single board of the short core board and the long middle board is 2.68mm;

[0076] (5) drying the veneer obtained in step (4) to a moisture content of 8%;

[0077] (6) Mix 7.82 parts by mass of water and 3.65 parts by ...

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Abstract

The invention provides a pinus kesiya film covering building formwork and a manufacture method of the pinus kesiya film covering building formwork. The preparation method comprises the steps as follows: cutting raw wood into wood sections; boiling the wood sections at constant temperature, and then removing the bast and cambium; spirally cutting into single sheet shaped plate around the axis, and drying; then uniformly coating urea resin adhesive on two surfaces of the single plate; arranging a panel, a rear plate and a long-middle plate which are coated with the adhesive into plate blanks; and then pre-pressing and thermally pressing the plate blanks to obtain the pinus kesiya film covering building formwork. The pinus kesiya film covering building formwork provided by the invention has high adhering strength and water resistance. With the adoption of the preparation method provided by the invention, the utilization rate of the raw wood and the production efficiency in spiral cutting can be improved; the cost can be reduced; the obtained pinus kesiya film covering building formwork has flat surface, high volume to weight ratio, high static bending intensity, high resistance to high temperature, high durable performance, high resistance to acid and base, high waterproof performance, little deformation, long service life and low surface absorbing force, is easy to demould during being used, and can be used at a plurality of times; and the problem that the primary adhering performance of the plate blank is low due to the variation of the weather, the dry season and the rainy season and the like can be solved.

Description

technical field [0001] The invention relates to a building template and a production method thereof, in particular to a Simao pine film-covered building template and a preparation method thereof, and belongs to the technical field of forest utilization. Background technique [0002] In basic construction projects, building formwork is a turnover tool with a large quantity and a wide range, and the cost of formwork generally accounts for about 23% of the total cost of reinforced concrete structural engineering. Formwork is of great significance to improving the surface quality of concrete, speeding up construction progress, improving work efficiency, and saving engineering costs. In the early 1970s, timber formwork was mainly used in construction projects in our country. Since the introduction of steel formwork technology in the mid-1970s, although certain benefits have been achieved and the goal of replacing wood with steel has been achieved, the steel formwork consumes a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G9/04B27D1/04B27D1/08C09J161/32
Inventor 李明
Owner 普洱市卫国林业局