Light weight high strength wood or bamboo base laminated composite precast slab or beam and manufacturing method thereof

A prefabricated panel, high-strength technology, applied in the direction of manufacturing tools, wooden veneer joints, flat products, etc., can solve the problems of inconvenient installation, low thermal insulation performance, poor earthquake resistance, etc., to achieve convenient transportation, strong earthquake resistance, The effect of strong carbon adsorption function

Active Publication Date: 2010-09-01
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a lightweight high-strength wood or bamboo-based laminated composite prefabricated panel or beam and its manufacturing method. low cost, inconvenient installation, high pollution, and high energy consumption, etc., a new type of composite prefabricated panel (beam) with light weight, high strength, and green environmental protection is proposed based on wood (bamboo) and its composite materials as basic units through lamination and recombination. ), to largely replace ore-fuel-intensive products—reinforced cement prefabricated slabs (beams) or cast-in-place slabs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1, lightweight high-strength wood or bamboo-based laminated composite prefabricated panels are all made of wood or sawn timber, the middle layer or core layer is laid horizontally or the middle layer or core layer is vertically arranged with the surface layer and the bottom layer, and the total thickness is 40mm or above. The size of wood or sawn timber can be 1”×6” or 1”×4”) after being planed and processed into 15×135mm or 15x85mm, and then glued into blanks, glued into blanks, using polyurethane resin or isophthalic Phenolic resin, the former is colorless, the latter is black, the aging time and curing time range from 3 minutes to 1 hour, can be selected according to specific requirements, the amount of sizing on one side is 125-185g / m 2 ; Pressurized curing, the curing pressure is usually 0.4-1.25MPa, and the moisture content of the adhesive to wood or sawn timber and its composite materials is required to be 8-15%.

Embodiment 2

[0012] Embodiment 2, lightweight high-strength wood or bamboo-based laminated composite prefabricated panels, by laminated veneer lumber (LVL) or bamboo laminated lumber as surface and bottom material, #2 or #3 specification wood (saw) timber is The core layer is made by staggered vertical arrangement, gluing and pressing. The thickness can usually be 45mm, and the width of the surface layer and the bottom layer material can be about 400mm. The specifications of the wood (sawn) timber can be selected as 1”×6” and become 15×135mm strips to form the core material after planing. Manufacturing method is the same as embodiment 1.

Embodiment 3

[0013] Embodiment 3, lightweight high-strength wood or bamboo-based laminated composite prefabricated panels, by laminated veneer lumber (LVL) or bamboo laminated lumber as surface and bottom material, oriented strand board (OSB) or medium density fiberboard (MDF) as core made of layers. The thickness of the skin and bottom layer material can usually be 15-20mm, the core layer is usually 10-20mm, and the thickness of the final product is 40-60mm. Manufacturing method is the same as embodiment 1.

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Abstract

The invention relates to a light weight high strength wood or bamboo base laminated composite precast slab or beam and manufacturing method thereof. The structure thereof is in three layers or five layers, manufacturing method includes the following process steps: (1) broadside splicing is carried out to form a laminated unit with breadth requirement; (2) polishing or sanding is carried out on the laminated unit; (3) glue assembly is coated by adopting polyurethane resin or resorcinol resin, and rate of spreading single face is 125-185g/m2; (4) pressure curing is carried out, curing pressure is generally 0.4-1.25MPa, and moisture content requirement of material is 8-15%. The invention has the advantages that weight is light, strength is high, natural reproduction can be realized, and carbon absorption function is strong; the product is environmentally friendly, shock resistance is strong, price is low, transportation is convenient, house construction is fast and convenient; heat-conducting property of structure slab is only 1/9 that of steel bar concrete precast slab (beam) and cast-in-situ beam; thermal insulation property of construction can be improved more than 40%, emission of greenhouse gas is reduced, thus achieving the comprehensive effect of energy conservation and consumption reduction.

Description

technical field [0001] The invention relates to a lightweight high-strength wood or bamboo-based laminated composite prefabricated board or beam and a manufacturing method thereof, belonging to the technical field of composite prefabricated boards. Background technique [0002] Reinforced cement (concrete) prefabricated slabs (beams) and cast-in-place beams are currently widely used in industrial and civil buildings (residential, apartment and commercial). In the respective manufacturing processes of steel bars and cement, energy consumption is large, greenhouse gas emissions are extremely serious, and a large amount of dust and pollution are generated. Environmental pollution is caused again during the house demolition process, and the materials cannot be recycled. Compared with wood structures, steel frame and cement structures use up to 17% and 16% more energy respectively, and produce 26% and 31% more greenhouse gas effects. It turns out that the materials used to buil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27D1/00B27N3/00B27N3/10B27N5/00
Inventor 张齐生王建和李瑜王正
Owner NANJING FORESTRY UNIV
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