CN109732711A - A kind of manufacturing method recombinating composite construction bamboo - Google Patents
A kind of manufacturing method recombinating composite construction bamboo Download PDFInfo
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- CN109732711A CN109732711A CN201910052638.2A CN201910052638A CN109732711A CN 109732711 A CN109732711 A CN 109732711A CN 201910052638 A CN201910052638 A CN 201910052638A CN 109732711 A CN109732711 A CN 109732711A
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- bamboo
- composite construction
- shu danyuan
- pressing formation
- reinforcing bar
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Abstract
The present invention relates to a kind of manufacturing methods for recombinating composite construction bamboo, belong to green bamboo building material technical field.The method of the present invention is using bamboo beam, adhesive and reinforcing bar as raw material, by discongesting, drying, impregnation, spreading and pressing formation etc., manufacture high-performance recombinates composite construction bamboo, selects most common Ribbed Bar and Recombined bamboo progress compound, and with this pressing formation, manufacturing cost is low, manufacturing process is easy.When recombinating composite construction bamboo as structural elements such as beam, column and plates, high-modulus characteristic possessed by Ribbed Bar can dramatically increase the rigidity of entire component, to promote the bearing capacity of entire component；Ribbed Bar elongated arrangement along its length, can promote the intensity for being obviously improved joint, to promote the bearing capacity of entire component.The method of the present invention easy can rapidly produce high-performance recombination composite construction bamboo, and the high-performance recombination composite construction bamboo of manufacture has the characteristic that modulus is high, strength of joint is high, has broad application prospects in building structure.
Description
Technical field
The present invention relates to a kind of manufacturing methods for recombinating composite construction bamboo, are particularly suitable for mechanical property requirements height, specification
The building structural elements such as size big structure beam, column and plate, belong to green bamboo building material technical field.
Background technique
Recombined bamboo is a kind of Novel bamboo composite material, is by bamboo beam by processes systems such as impregnation, drying, assembly and gluings
It makes.Due to being limited by bamboo beam specification size, in building structure structures such as manufacture specification big structure beam, column and plates
When part, often bamboo beam is spliced along its length, the bamboo Shu Danyuan pressing formation that then multilayer is mated formation along its length.
The Recombined bamboo material that this method manufactures has typical high-intensitive, low modulus characteristic.By taking tensile property as an example, recombination
The tensile strength (unit: MPa) and its density (unit: g/cm of bamboo3) ratio be 121, be much higher than timber, steel and coagulation
Soil；The tensile modulus of elasticity (unit: GPa) and its density (unit: g/cm of Recombined bamboo3) ratio be then only 16, it is slightly above mixed
Solidifying soil, far below timber and reinforcing bar (volume 44 the 1st phase page 60~64 of Agricultural University Of Anhui's journal 2017 " structure weighs
Group bamboo anti-bending mechanics performance ").In addition, bamboo beam is spliced along its length when manufacturing Recombined bamboo, existing splicing is connect
Head, the loss of strength that frequently can lead to joint is excessive, can generally reduce by 30~50%.These there are the problem of will lead to tradition
The recombining bamboo of method manufacture is difficult to meet the buildings knots such as mechanical property requirements height, specification big structure beam, column and plate
The requirement of structure component.
Through related document and data-searching, as building materials decorate the " pre- of volume 14 the 6th phase page 54~56 in the 2012nd
Stress cemented bamboo, the dissemination of wooden frame and Primary Study ", providing a kind of enhances gluing using prestressed method is applied
The bending stiffness of bamboo and wood beam, but butt joint intensity does not improve, and the disadvantages of this method is later-stage secondary processing, complex process；Work
Industry builds " the combined I-shaped ellbeam flexural property of light gauge cold-formed steel shape-Recombined bamboo of the 1st phase page 20~24 of volume 46 in the 2016th
Research " provides and a kind of using Recombined bamboo and light gauge cold-formed steel shape carries out secondary gluing to improve unjointed beam bending stiffness and by force
The method of degree, this method is later-stage secondary processing, complex process, and manufacturing cost is high.
Summary of the invention
The purpose of the present invention is to provide a kind of recombination composite construction bamboo to improve the deficiency in prior art technology
Manufacturing method makes its mechanical property meet the requirement of structural elements, quickly propels Recombined bamboo in the application of building structure field.
The manufacturing method of recombination composite construction bamboo proposed by the present invention, comprising the following steps:
(1) raw bamboo is discongested into bamboo Shu Danyuan, make bamboo Shu Danyuan with a thickness of 10~15mm, the length of bamboo Shu Danyuan is
The width of 2000~3000mm, bamboo Shu Danyuan are 100~150mm；
(2) it by the above-mentioned bamboo Shu Danyuan discongested, is dried using hot-air as medium, drying temperature 40~70
DEG C, drying time is 8~10h；
(3) the bamboo Shu Danyuan after above-mentioned drying is immersed in phenol resin solution, the solids level concentration of phenolic resin is 9
~15%, dipping temperature is 18~30 DEG C, and dip time is 10~20 minutes；
(4) bamboo Shu Danyuan after dipping that step (3) obtains is spelled into length along its length, through-thickness is mated formation, and bamboo beam is made
The number of plies of elementary layer is 4~30 layers, and the distance that is staggered of adjacent bamboo beam elementary layer connector is denoted as l, 400≤l≤1000mm, by reinforcing bar
Mat formation between bamboo beam elementary layer, obtains recombination composite construction bamboo first product；
(5) pressing formation is carried out to the recombination composite construction bamboo first product of step (4), according to pressure sintering, pressing formation
Pressure is 1~5MPa, and the temperature of pressing formation is 120~150 DEG C, and the time of pressing formation is 40~70 minutes, according to cold
Platen press, the pressure of pressing formation are 30~70MPa, and the temperature of heat cure is 120~150 DEG C, after pressing formation after pressing formation
The time of heat cure is 12~20 hours, obtains composite construction bamboo product.
In the manufacturing method of above-mentioned recombination composite construction bamboo, reinforcing bar is Ribbed Bar, and the diameter of reinforcing bar is 10~22mm, will
The protective layer thickness of reinforcing bar is denoted as as, as≥8mm。
A kind of manufacturing method recombinating composite construction bamboo proposed by the present invention, its advantage is that:
The manufacturing method of recombination composite construction bamboo of the invention, selects most common Ribbed Bar and Recombined bamboo to be answered
It closes, and with this pressing formation, manufacturing cost is low, manufacturing process is easy.When recombination composite construction bamboo is used as the structures such as beam, column and plate
When component, high-modulus characteristic (modulus 206GPa) possessed by Ribbed Bar can dramatically increase the rigidity of entire component, thus
Promote the bearing capacity of entire component；Ribbed Bar elongated arrangement along its length, can promote the intensity for being obviously improved joint, from
And promote the bearing capacity of entire component.The method of the present invention easy can rapidly produce high-performance recombination composite construction bamboo, system
The high-performance recombination composite construction bamboo made has the characteristic that modulus is high, strength of joint is high, has wide answer in building structure
Use prospect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of recombination composite construction bamboo proposed by the present invention.
Fig. 2 be beam of the present invention, column embodiment 1 recombination composite construction bamboo sectional view.
Fig. 3 is the sectional view of the recombination composite construction bamboo of plate embodiment 2 of the present invention.
In Fig. 1, Fig. 2 and Fig. 3,1 is bamboo Shu Danyuan, and 2 be reinforcing bar, and 3 be the connector of two bamboo Shu Danyuan.
Specific embodiment
The manufacturing method of recombination composite construction bamboo proposed by the present invention, structure are as shown in Figure 1, comprising the following steps:
(1) raw bamboo is discongested into bamboo Shu Danyuan 1, make bamboo Shu Danyuan 1 with a thickness of 10~15mm, the length of bamboo Shu Danyuan is
The width of 2000~3000mm, bamboo Shu Danyuan are 100~150mm；
(2) it by the above-mentioned bamboo Shu Danyuan discongested, is dried using hot-air as medium, drying temperature 40~70
DEG C, drying time is 8~10h；
(3) the bamboo Shu Danyuan after above-mentioned drying is immersed in phenol resin solution, the solids level concentration of phenolic resin is 9
~15%, dipping temperature is 18~30 DEG C, and dip time is 10~20 minutes；
(4) bamboo Shu Danyuan after dipping that step (3) obtains is spelled into length along its length, through-thickness is mated formation, and bamboo beam is made
The number of plies of elementary layer is 4~30 layers, and the distance that is staggered of adjacent bamboo beam elementary layer connector 3 is denoted as l, 400≤l≤1000mm, by steel
Muscle 2 is mated formation between bamboo beam elementary layer, and recombination composite construction bamboo first product is obtained；
(5) pressing formation is carried out to the recombination composite construction bamboo first product of step (4), according to pressure sintering, pressing formation
Pressure is 1~5MPa, and the temperature of pressing formation is 120~150 DEG C, and the time of pressing formation is 40~70 minutes, according to cold
Platen press, the pressure of pressing formation are 30~70MPa, and the temperature of heat cure is 120~150 DEG C, after pressing formation after pressing formation
The time of heat cure is 12~20 hours, obtains composite construction bamboo product.
In the manufacturing method of above-mentioned recombination composite construction bamboo, reinforcing bar 2 is Ribbed Bar, and the diameter of reinforcing bar is 10~22mm,
The protective layer thickness of reinforcing bar is denoted as as, as≥8mm。
Embodiment of the present invention method introduced below:
Embodiment 1
(1) raw bamboo is discongested into bamboo Shu Danyuan (1), make bamboo Shu Danyuan with a thickness of 10mm, the length of bamboo Shu Danyuan is
1200, two kinds of 1800mm, the width of bamboo Shu Danyuan are 100mm；
(2) it by the above-mentioned bamboo Shu Danyuan discongested, is dried, 50 DEG C of drying temperature, is done as medium using hot-air
The dry time is 8h；
(3) the bamboo Shu Danyuan after above-mentioned drying is immersed in phenol resin solution, the solids level concentration of phenolic resin
10%, dipping temperature is 25 DEG C, and dip time is 10 minutes；
(4) bamboo Shu Danyuan after dipping that step (3) obtains is spelled into length along its length, through-thickness is mated formation, and bamboo beam is made
The number of plies of elementary layer is 20 layers, and the distance l=600mm that is staggered of adjacent bamboo beam elementary layer connector (3) mats formation reinforcing bar (2) in bamboo
Between beam elementary layer, recombination composite construction bamboo first product is obtained；
(5) pressing formation is carried out to the recombination composite construction bamboo first product of step (4), using cold-press method, the pressure of pressing formation
Power is 40MPa, and the temperature of heat cure is 135 DEG C after pressing formation, and the time of heat cure is 18 hours after pressing formation, obtains weight
Group composite construction bamboo product, cross-sectional view such as Fig. 2, cross sectional dimensions be 100 (width) × 200mm (thickness) ×
3600mm (length).
The reinforcing bar is Ribbed Bar (2), and the diameter of reinforcing bar is 14mm, the protective layer thickness a of reinforcing bars=30mm.
Beam, the column of exemplary embodiments of the present invention are formed by above-mentioned recombination composite construction bamboo product manufacturing.
Reference examples 1
Control exemplary embodiments are the recombination composite construction bamboo without reinforcing bar, it includes bamboo Shu Danyuan, adhesive, by multilayer
Bamboo Shu Danyuan spells length along its length, and through-thickness is mated formation；By being cold-pressed a pressing formation；Bamboo Shu Danyuan is selected when impregnating
Adhesive be impregnating phenolic resin；For bamboo Shu Danyuan by raw bamboo by discongesting, bamboo beam element thickness is 10mm；Bamboo Shu Dan
Member is when mating formation, the distance l=600mm that is staggered of adjacent bamboo beam layer connector.
Control 1 be free of reinforcing bar recombination composite construction bamboo exemplary manufacturing method, other than not adding reinforcing bar, other techniques with
Embodiment 1 is equivalent.
Table 1 recombinates the mechanical property of composite construction bamboo beam, column
As it can be seen from table 1 using mechanical property and the reference examples phase of the bamboo beam made of present invention recombination composite construction, column
Than the compression strength of column increases 24.2%, and the pressure-proof elasticity modulus of column increases 38.6%, and the bending strength of beam increases
33.3%, the Deflection Modulus of Elasticity of beam increases 40.9%, is significantly improved.
Embodiment 2
(1) raw bamboo is discongested into bamboo Shu Danyuan (1), make bamboo Shu Danyuan with a thickness of 10mm, the length of bamboo Shu Danyuan is
800, two kinds of 1200mm, the width of bamboo Shu Danyuan are 100mm；
(2) it by the above-mentioned bamboo Shu Danyuan discongested, is dried, 50 DEG C of drying temperature, is done as medium using hot-air
The dry time is 8h；
(3) the bamboo Shu Danyuan after above-mentioned drying is immersed in phenol resin solution, the solids level concentration of phenolic resin
10%, dipping temperature is 25 DEG C, and dip time is 10 minutes；
(4) bamboo Shu Danyuan after dipping that step (3) obtains is spelled into length along its length, through-thickness is mated formation, and bamboo beam is made
The number of plies of elementary layer is 5 layers, and the distance l=400mm that is staggered of adjacent bamboo beam elementary layer connector (3) mats formation reinforcing bar (2) in bamboo beam
Between elementary layer, recombination composite construction bamboo first product is obtained；
(5) pressing formation is carried out to the recombination composite construction bamboo first product of step (4), using pressure sintering, the pressure of pressing formation
Power is 4MPa, and the temperature of pressing formation is 135 DEG C, and the time of pressing formation is 40 minutes, obtains recombination composite construction bamboo product,
Its cross-sectional view such as Fig. 3, cross sectional dimensions are 1220 (width) × 40mm (thickness) × 2400mm (length).
The reinforcing bar is Ribbed Bar (2), and the diameter of reinforcing bar is 10mm, the protective layer thickness a of reinforcing bars=15mm.
The plate of exemplary embodiments of the present invention is formed by above-mentioned recombination composite construction bamboo product manufacturing.
Reference examples 2
Control exemplary embodiments are the recombination composite construction bamboo without reinforcing bar, it includes bamboo Shu Danyuan, adhesive, by multilayer
Bamboo Shu Danyuan spells length along its length, and through-thickness is mated formation；By pressing formation of hot pressing；Bamboo Shu Danyuan is selected when impregnating
Adhesive be impregnating phenolic resin；For bamboo Shu Danyuan by raw bamboo by discongesting, bamboo beam element thickness is 10mm；Bamboo Shu Dan
Member is when mating formation, the distance l=400mm that is staggered of adjacent bamboo beam layer connector.
Control 2 be free of reinforcing bar recombination composite construction bamboo exemplary manufacturing methods, other than not adding reinforcing bar, other techniques with
Embodiment 2 is equivalent.
The mechanical property of the recombination composite construction bamboo clappers of table 2
From table 2 it can be seen that using the mechanical property of the present invention recombination bamboo plate made of composite construction compared with reference examples,
The bending strength of plate increases 40.3%, and the Deflection Modulus of Elasticity of plate increases 38.3%, is significantly improved.
Claims (2)
1. a kind of manufacturing method for recombinating composite construction bamboo, it is characterised in that method includes the following steps:
(1) raw bamboo is discongested into bamboo Shu Danyuan, make bamboo Shu Danyuan with a thickness of 10~15mm, the length of bamboo Shu Danyuan is 2000~
The width of 3000mm, bamboo Shu Danyuan are 100~150mm；
(2) it by the above-mentioned bamboo Shu Danyuan discongested, is dried, 40~70 DEG C of drying temperature, is done as medium using hot-air
The dry time is 8~10h；
(3) the bamboo Shu Danyuan after above-mentioned drying being immersed in phenol resin solution, the solids level concentration of phenolic resin is 9~
15%, dipping temperature is 18~30 DEG C, and dip time is 10~20 minutes；
(4) bamboo Shu Danyuan after dipping that step (3) obtains is spelled into length along its length, through-thickness is mated formation, and bamboo Shu Danyuan is made
The number of plies of layer is 4~30 layers, and the distance that is staggered of adjacent bamboo beam elementary layer connector is denoted as l, and 400≤l≤1000mm mats formation reinforcing bar
Between bamboo beam elementary layer, recombination composite construction bamboo first product is obtained；
(5) pressing formation is carried out to the recombination composite construction bamboo first product of step (4), according to pressure sintering, the pressure of pressing formation
For 1~5MPa, the temperature of pressing formation is 120~150 DEG C, and the time of pressing formation is 40~70 minutes, according to cold-press method,
The pressure of pressing formation is 30~70MPa, and the temperature of heat cure is 120~150 DEG C after pressing formation, heat cure after pressing formation
Time be 12~20 hours, obtain composite construction bamboo product.
2. the manufacturing method of recombination composite construction bamboo as described in claim 1, it is characterised in that wherein the reinforcing bar is band
The diameter of rib reinforcement, reinforcing bar is 10~22mm, and the protective layer thickness of reinforcing bar is denoted as as, as≥8mm。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832448A (en) * | 2021-02-20 | 2021-05-25 | 东北林业大学 | CLBT (laminated rubber-laminated) wallboard with built-in reinforcing steel bars and processing method |
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| CN102941612A (en) * | 2012-10-31 | 2013-02-27 | 中南林业科技大学 | Method for manufacturing recombined bamboo decorative material |
| CN103182727A (en) * | 2012-09-25 | 2013-07-03 | 国家林业局北京林业机械研究所 | Hollow recombined bamboo and manufacturing method thereof |
| CN105619570A (en) * | 2015-12-29 | 2016-06-01 | 南京林业大学 | Preparing method of high-weather-resistance reconsolidated bamboo |
| CN106965271A (en) * | 2017-04-17 | 2017-07-21 | 国家林业局竹子研究开发中心 | A kind of outdoor recombination bamboo product and preparation method |
| CN108839146A (en) * | 2018-08-21 | 2018-11-20 | 南京林业大学 | A kind of precise positioning enhancing muscle Recombined bamboo component production mould and production method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201972238U (en) * | 2011-03-04 | 2011-09-14 | 南京林业大学 | Embedded rebar enhanced bamboo structure |
| CN103182727A (en) * | 2012-09-25 | 2013-07-03 | 国家林业局北京林业机械研究所 | Hollow recombined bamboo and manufacturing method thereof |
| CN102941612A (en) * | 2012-10-31 | 2013-02-27 | 中南林业科技大学 | Method for manufacturing recombined bamboo decorative material |
| CN105619570A (en) * | 2015-12-29 | 2016-06-01 | 南京林业大学 | Preparing method of high-weather-resistance reconsolidated bamboo |
| CN106965271A (en) * | 2017-04-17 | 2017-07-21 | 国家林业局竹子研究开发中心 | A kind of outdoor recombination bamboo product and preparation method |
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| CN112832448A (en) * | 2021-02-20 | 2021-05-25 | 东北林业大学 | CLBT (laminated rubber-laminated) wallboard with built-in reinforcing steel bars and processing method |
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