CN102587575A - Bamboo layer laminated plate bamboo-imitated structure integrated light sectional material and preparation method thereof - Google Patents
Bamboo layer laminated plate bamboo-imitated structure integrated light sectional material and preparation method thereof Download PDFInfo
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- CN102587575A CN102587575A CN2012100477914A CN201210047791A CN102587575A CN 102587575 A CN102587575 A CN 102587575A CN 2012100477914 A CN2012100477914 A CN 2012100477914A CN 201210047791 A CN201210047791 A CN 201210047791A CN 102587575 A CN102587575 A CN 102587575A
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Abstract
The invention belongs to a construction material and particularly relates to a bamboo layer laminated plate bamboo-imitated structure integrated light sectional material and a preparation method thereof. The bamboo layer laminated plate bamboo-imitated structure integrated light sectional material comprises a transverse box body structure light sectional material and a stand column hollow structure light sectional material. The main technical process disclosed by the invention comprises the following steps of: firstly, carrying out procedures of splitting, spreading and milling, carrying out soft plastification and heat treatment, drying, gum dipping and the like on moso bamboos to obtain bamboo block units; then, carrying out procedures of paving and assembling along grains, molding and hotly pressing and the like to prepare a bamboo layer laminated plate; and finally, carrying out the procedures of assembling, molding and hotly pressing and the like to prepare the bamboo-imitated structure integrated light sectional material. The bamboo-imitated structure integrated light sectional material disclosed by the invention has the advantages that the weight of a structure sectional material can be reduced, the use amount of bamboos can be reduced, the production cost is reduced, and a good mechanical property of high tensile strength and compression strength along the grain of the bamboos is exerted; the bamboo-imitated structure integrated light sectional material can be produced into a beam, a column or a wall body in a building structure, so that the bearing capability and the rigidity are greatly improved and a new way for applying the bamboos to the building structure is provided.
Description
Technical field
The invention belongs to building material technical field, be specifically related to imitative integrated light-duty material of bamboo structure of a kind of bamboo laminated plate and preparation method thereof.
Background technology
Bamboo wood has goodish mechanical property, and with regard to intensity and cost, bamboo is considered to the highest material of occurring in nature usefulness.The tensile strength of bamboo wood is about 2 times of timber, and compressive strength is 1.5 times of timber, and the specific strength of bamboo wood is higher than timber and common iron, and therefore, bamboo wood possesses the good condition as the building structure section bar.If it is developed the rational structure section bar, just can widen the purposes of bamboo wood, open up a kind of effective way for utilizing bamboo resource.Up to the present; Bamboo wood also rests in the application of indoor house ornamentation and construction formwork basically; Be not used as the building structure section bar as yet; The tension of bamboo wood, resistance to compression mechanical property are not fully played, and structural shape and single load bearing structural members such as the beam slab in the very suitable development architecture structure of bamboo wood self excellent mechanical property, post, body of wall.
The organism that though bamboo is exist in the nature a kind of typical, have the good mechanical performance, its intensity height, good springiness, stable performance, and also density is little.The structures shape mechanical property, bamboo organism structure will be born the quality of self and the load of growing environment, and very long evolutionary process makes its structure have excellent mechanical property.Yet bamboo is the hollow cylinder of minor diameter, from the shape to the performance, all can not satisfy the construction requirement of modern construction engineering structure.Desire is used it as the building structure section bar, must change the shape modification to former bamboo, produces the sheet material and the section bar that can be suitable for modern construction engineering structure building technology.At present, recombining bamboo, lamination bamboo wood can obtain the slab of thicker size under the press capacity meets the demands situation; And then being cut into the square bars such as beam, post of different size, this artificial bamboo board compacting is that very high pressure could obtain enough intensity, so product density is bigger; Raw materials consumption is more; Cost of production is high, and building units such as the beam of employing solid section, plate, post are crossed over bigger, span and highly uneconomical.And they are in manufacture process, and the fiber biological of bamboo wood plane mills more, and inner tissue's structure of bamboo wood has been suffered destruction, and its intensity is not in full use.The increasing demand of the light-weight design of building structural member in practical engineering application increases, and the structure of bamboo is the more typical lightweight structure that occurring in nature exists, and has given us and has designed the useful inspiration of the light-duty material of bamboo matter building structure.Simultaneously, because current China increases the increasing demand of wooden construction section bar, and timber resources lacks relatively, and the wood supply demand contradictory under the intense situation, is accelerated development the light-duty material of bamboo matter building structure day by day, will have important practical significance.
Summary of the invention
First purpose of the present invention is to provide a kind of lightweight structure from former bamboo to gain enlightenment; Can make full use of resistance to compression, the tensile mechanical performance of former bamboo wood; Can obtain sufficient intensity, again can weight reduction, reduce raw materials consumption, meet the imitative integrated light-duty material of bamboo structure of bamboo laminated plate of modern construction engineering structure building technology.
First purpose of the present invention is to realize through following technical scheme: this bamboo laminated plate is imitated the integrated light-duty material of bamboo structure, and it comprises the light-duty material of transverse box body structure and the light-duty material of column hollow-core construction of the imitative bamboo structure of being processed through assembly, moulding hot pressing by bamboo laminated plate.
Specifically; The light-duty material of said transverse box body structure comprises two edge-on placements and bamboo laminated plate at regular intervals therebetween; And between two bamboo laminated plate opposed inside faces along laterally evenly being provided with some joint, be provided with gusset piece in the both ends of the surface of two bamboo laminated plates.
In the light-duty material of above-mentioned transverse box body structure, adopt the resin bonding of thermosetting shape between bamboo laminated plate and joint and the gusset piece and adopt prefabricated bamboo nail location.The spacing range of two bamboo laminated plate medial surfaces is 60～100mm, and the spacing range of per two joint is 300～400mm, and the thickness of joint is 20～30mm.
The light-duty material of said column hollow-core construction comprises that four vertical placements surround the bamboo laminated plate of square hollow column shape, and in hollow column, vertically evenly is provided with some joint, is provided with gusset piece in hollow column both ends of the surface.
In the light-duty material of above-mentioned column hollow-core construction, respectively the connecting between the side, adopt thermosetting shape resin bonding and adopt prefabricated bamboo nail location between joint and gusset piece and four bamboo laminated plates of four bamboo laminated plates.Spacing range between per two joint is 400mm, and the thickness range of joint is 30～35mm.
More particularly, said bamboo laminated plate be by mao bamboon through the bamboo module unit of analysing, launching milling and processing again through the rift grain tabular component that assembly, moulding hot pressing form of mating formation; It comprises: be in contact with one another transversely arrangedly by each side of bamboo module unit, the bamboo strip of each bamboo module unit is upper surface or the top layer lamina that forms for soffit simultaneously simultaneously; Perhaps, be in contact with one another by each side of bamboo module unit transversely arranged, the sandwich layer lamina that the bamboo strip of each adjacent bamboo module unit and yellow bamboo face form for upper surface alternately; Perhaps; Contact with yellow bamboo face or bamboo strip contacts with bamboo strip and the doubling plate that forms by the yellow bamboo face of two said top layer laminas; And the rest may be inferred, and bamboo strip contacts with bamboo strip or yellow bamboo face contacts with yellow bamboo face and the even level composite board that forms between doubling plate and the doubling plate.
Second purpose of the present invention is to provide the preparation method of the imitative integrated light-duty material of bamboo structure of above-mentioned bamboo laminated plate, and it comprises the step of following order:
(1) obtaining of arc bamboo piece: the mao bamboon cross cut saw is become the fixed length thick bamboo tube, the fixed length thick bamboo tube is pressed the thickness classification, splitting collides is split into thick bamboo tube the arc bamboo piece of Fixed width through cuing open;
(2) the expansion milling of arc bamboo piece: arc bamboo piece is cutd open the expansion milling machine through roller be processed into the wide bamboo piece of planar shaped uniform thickness, the outer ring of a surf green surface layer milling;
(3) the soft plasticizing heat treatment of bamboo piece: will go up a step gained bamboo piece and put into seal pot, wherein, pressure is 0.25Mpa, and temperature is 135 ℃, and temperature retention time is 30～50min;
(4) drying of bamboo piece: will go up the bamboo piece pile handled of step to the oven dry frame of return air channel type dry kiln, and push and carry out drying in the kiln, the dried water content requirement of bamboo piece is below 10%;
(5) bamboo piece impregnation: with dried bamboo piece impregnation; Bonding adhesive adopts the resorcinol modified alkyd resin glue, mixes the coupling agent KH-602 that accounts for its quality 3～5%, and the solid content of bonding adhesive is 35%; Ageing or low temperature drying be to tack-free behind the bamboo piece impregnation, bamboo piece moisture content≤12%;
(6) assembly: will go up the manual rift grain assembly of bamboo module unit of a step gained, during the lamina of group top layer, the bamboo strip of each bamboo module unit is upper surface or is soffit simultaneously that each bamboo module unit limit is in contact with one another simultaneously; During core assembly layer lamina, the bamboo strip of each adjacent bamboo module unit and yellow bamboo face are upper surface alternately, and each bamboo module unit limit is in contact with one another; During the group composite board; The yellow bamboo face of two said top layer laminas is contacted with yellow bamboo face or bamboo strip contacts with bamboo strip and forms doubling plate; And the rest may be inferred, and bamboo strip contacts with bamboo strip or yellow bamboo face contacts with yellow bamboo face and forms the even level composite board between doubling plate and the doubling plate; During the blanket spreading, the bamboo piece is the rift grain spreading longitudinally, adopts toe joint or inclined-plane overlap joint between the blanket;
(7) hot-pressed board: will go up the bamboo laminated plate hot pressing of gained behind the step assembly, hot pressing temperature is 130～140 ℃, and the heat pressing operation program is divided following three phases:
Heating precompressed exhaust phase: the time is 1～2min, pressure: normal pressure is 3.0～4.0Mpa, and lateral pressure is 4.0～5.0Mpa;
Packing stage: the time is 0.8～1min/mm, pressure: normal pressure is 4.0～5.0Mpa, and lateral pressure is 5.0～6.0Mpa;
The step-down exhaust phase: the time is 2～3min, pressure: normal pressure is 1.5～2.0Mpa, and lateral pressure is 1.0～1.5Mpa;
(8) by the specification panel: processed is carried out on the surface to the bamboo laminated plate after the last step processing, excludes the glued membrane on the bonding plane and processes the required given size sheet material of next step processing, perhaps adopts sand cutting method sand to fall glued membrane;
(9) imitative bamboo structure assembly: during the light-duty material of group transverse box body structure; The edge-on placement symmetry of the bamboo laminated plate of two last step gained is cooperated; Two plates leave 60～100mm spacing, in the middle of two plates, along horizontal per 300～400mm spacing, a joint that 20～30mm is thick are set; Both ends of the surface are provided with gusset piece, coat thermosetting shape resin glue and prefabricated bamboo nail location at the position that joint and gusset piece contact with the bamboo laminated plate material;
During the light-duty material of group column hollow-core construction; Vertically placing its side and face limit with the bamboo laminated plates of four last step gained is in contact with one another and is combined into square hollow column body; Between SMIS; Vertically every 400mm spacing is provided with a joint that 30～35mm is thick, and both ends of the surface are provided with the end-blocking gusset piece, and joint is coated thermosetting shape resin glue and prefabricated bamboo nail location with the position that gusset piece contacts with the bamboo laminated plate material;
(10) moulding: will go up the imitative bamboo structure section bar that combines of step and carry out thermocompression forming processing, lower pressure is adopted in typing hot pressing, and pressure is 2.0Mpa, and hot pressing temperature is 105 ℃, and the time is that the 0.8min/mm slab is thick, perhaps, adopts cold pressing glue and colds pressing the method moulding;
(11) following process: will go up that surface that a step handles the imitative bamboo structure section bar after the typing carries out that sand is cut, deburring, paint front cover protection processing, and promptly get and imitate the integrated light-duty material of bamboo structure.
The integrated light-duty material of imitative bamboo structure of the present invention; At first adopt the ortho states bamboo wood to analyse and flatten plane miller skill; Produce the bamboo laminated plate material with former bamboo wood tension resistance to compression mechanical property, keep bamboo wood physical objects bamboo fibre to greatest extent, utilization rate of bamboo reaches 80%; Improved 30% than old technology, and kept and increased the measuring body mechanical property of bamboo wood tension.Profiling is in bamboo structure again, and the bamboo laminated plate material integrated building light in structure section bar with thin can alleviate structural shape weight; Can reduce the bamboo wood consumption again; Reduce production costs, brought into play the high good mechanical property of bamboo wood rift grain tension compressive strength, reach the light-weighted structure of section bar.Because the integrated light-duty material of imitative bamboo structure of the present invention; Profiling is in the hollow-core construction of mao bamboon; And wherein be provided with the joint of similar ring, the joint of this similar ring can be regarded densely covered reinforcing rib as, makes the lateral bearing ability of integrated light-duty material of the present invention improve 3 times; Therefore, the rigidity and stability of structure have been improved.Through check, each item technical indicator of the integrated light-duty material of imitative bamboo structure of the present invention reaches: amount of densities>=75g/cm
3, horizontal MOR>=65Mpa, longitudinal modulus of elasticity>=5800Mpa, tensile strength parallel to the grain＞130Mpa, crushing strength across the grain＞20Mp, crushing strength parallel to the grain＞60Mpa, adhesive strength>=1.0Mpa, nail-holding ability>=1200N.Therefore, the integrated light-duty material of imitative bamboo structure of the present invention is as beam, post or body of wall in the building structure, and its supporting capacity and rigidity are greatly enhanced, for the application of bamboo wood in building structure provides new approach.
Description of drawings
Fig. 1 is the structural representation of the light-duty material of transverse box body structure of the embodiment of the invention.
Fig. 2 is the structural representation of the light-duty material of column hollow-core construction of the embodiment of the invention.
Fig. 3 is the structural representation of the top layer lamina of the embodiment of the invention.
Fig. 4 is the structural representation of the sandwich layer lamina of the embodiment of the invention.
Fig. 5 is the structural representation of the doubling plate of the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.
Referring to Fig. 1; It is the structural representation of the light-duty material of transverse box body structure in the imitative integrated light-duty material of bamboo structure of the present invention; Visible by figure; The light-duty material of transverse box body structure comprises that two edge-on placements and its spacing scope are the bamboo laminated plates 1 of 60～100mm, and the edge laterally whenever is provided with joint 2 at a distance from 300～400mm between two bamboo laminated plates, 1 opposed inside face, and the thickness of joint 2 is 20～30mm; Both ends of the surface at two bamboo laminated plates 1 are provided with gusset piece 3.Adopt the resin bonding of thermosetting shape between bamboo laminated plate 1 and joint 3 and the gusset piece 3 and adopt prefabricated bamboo nail location.
Referring to Fig. 2; It is the structural representation of the light-duty material of column hollow-core construction in the imitative integrated light-duty material of bamboo structure of the present invention; Visible by figure; The light-duty material of column hollow-core construction comprises that four are vertically placed the bamboo laminated plate 4 that surrounds square hollow column shape, and vertically every separated 400mm is provided with joint 5 in hollow column, and the thickness of joint 5 is 30～35mm.Be provided with gusset piece 6 in hollow column both ends of the surface.The side of four bamboo laminated plates 4 is with between the face limit connects, adopt thermosetting shape resin bonding and adopt prefabricated bamboo nail location between joint 5 and gusset piece 6 and four bamboo laminated plates 4.
Light-duty material of above-mentioned transverse box body structure and the light-duty material of column hollow-core construction are the section bars of the imitative bamboo structure processed through assembly, moulding hot pressing by bamboo laminated plate, bamboo laminated plate be by mao bamboon through the bamboo module unit of analysing, launching milling and processing again through the rift grain tabular component that assembly, moulding hot pressing form of mating formation.It comprises top layer lamina, sandwich layer lamina and even level composite board.Referring to Fig. 3, be the structural representation of top layer lamina, it is in contact with one another transversely arranged by each side of bamboo module unit 7, and the bamboo strip 8 of each bamboo module unit 7 forms for upper surface simultaneously.Referring to Fig. 4, be the structural representation of sandwich layer lamina, it is in contact with one another transversely arranged by each side of bamboo module unit 7, and the bamboo strip 8 and the yellow bamboo face 9 of each adjacent bamboo module unit 7 forms for upper surface alternately.Referring to Fig. 5, be the structural representation of doubling plate, it is contacted with yellow bamboo face 9 by the yellow bamboo face 9 of two above-mentioned top layer laminas and forms, and also can be contacted with bamboo strip by the bamboo strip of two top layer laminas and form.The rest may be inferred, and bamboo strip contacts with bamboo strip or yellow bamboo face contacts with yellow bamboo face and the even level composite board that forms between doubling plate and the doubling plate, like four laminates, six laminates etc.
Be the process for making of the integrated light-duty material of imitative bamboo structure of the present invention below:
The whole production technological process is: mao bamboon cuts tube → divide tube → analyse bamboo piece → expansion milling → classification to tie up → drying → assembly → hot-pressed board of soft plasticizing heat treatment → pile drying → impregnation → again → by regulation plate → biomimetic features assembly → integrated section bar → sawing → check → packing by thickness.
(1) the expansion milling technology of bamboo piece:
The target of the expansion milling technology of bamboo piece is: arc bamboo piece is cutd open the expansion milling machine through roller be processed into the wide bamboo piece of planar shaped uniform thickness.The outer ring of a surf green surface layer milling.Obtaining of arc bamboo piece is: the mao bamboon cross cut saw becomes the fixed length thick bamboo tube, and the fixed length thick bamboo tube is pressed the thickness classification, and splitting collides is split into thick bamboo tube the arc bamboo piece of one Fixed width through cuing open.Get into bamboo wood then and launch milling machine.The thickness of bamboo wood is different, can be processed into the bamboo piece of different-thickness through adjustment.
(2) the soft plasticizing heat treatment of bamboo piece:
Exist infested, mouldy material and the big characteristic of modulus of elasticity in the nature bamboo wood; Using and processing and have some unfavorable factors and difficulty bamboo wood; Therefore, handle bamboo wood, insect in the bamboo wood and mouldy mass treatment are fallen through high temperature and high pressure method; The modulus of elasticity of bamboo wood is reduced, and the plasticity ratio increases.Soft plasticizing process of thermal treatment requires: bamboo wood is in seal pot, and pressure is 0.25Mpa, 135 ℃ of temperature, and insulation 30-50min is according to bamboo wood thickness adjustment temperature retention time.
(3) drying of bamboo piece:
Bamboo piece drying is to be accomplished by return air channel type dry kiln.Bamboo piece four plates one are pricked,, to the oven dry frame of dry kiln, pushed and carry out drying in the kiln by the regulation pile, ordinary circumstance is an endfeed, and one brings out material.The dried moisture content of bamboo piece is below 10%, when dry the bamboo piece preferably press type carry out, prevent that the bamboo piece is dry crooked excessive.
(4) bamboo piece impregnation:
Bamboo piece impregnation must reach the spread of regulation.Bonding adhesive adopts the resorcinol modified alkyd resin glue, mixes the coupling agent KH-602 that accounts for its quality 3～5%, with wetability and the bonding strength of improving the surf green aspect.The solid content of bonding adhesive is 30%.Ageing or low temperature drying are to tack-free behind the bamboo piece impregnation, and moisture content≤12% could assembly.
(5) bamboo laminated plate assembly:
To carry out assembly before the bamboo laminated plate hot pressing, generally adopt manual rift grain assembly.Assembly comprises following several kinds of forms.
The first, during the lamina of group top layer, bamboo strip one side, yellow bamboo face one side, bamboo piece limit is in contact with one another, and is as shown in Figure 3; During core assembly layer lamina, a bamboo strip and a yellow bamboo face are alternately transversely arranged, make on two faces of surf green tabasheer in the middle layer plate symmetry and evenly distribute, and be as shown in Figure 4.
The second, during the group composite board, also should be by arrangement principle operation symmetrically and evenly.Vertically arrange even number level assembly, necessary surf green is to surf green when mating formation, and tabasheer is to tabasheer, and is as shown in Figure 5, solved the problem on deformation of bamboo laminated plate like this.
In addition, carry out suitable sorting by the intensity of bamboo piece, the bamboo piece that intensity is high is placed on the top layer when mating formation, intensity difference be placed on sandwich layer.Guaranteed the bulk strength of bamboo laminated plate like this.
All be that vertical rift grain is mated formation during above assembly, the bamboo piece is the rift grain spreading longitudinally, and joint will require stagger spacing＞300mm according to certain intervals successively during spreading.
(6) hot-pressed board technology:
With the bamboo laminated plate hot pressing of gained behind the last step assembly, hot pressing temperature is 130～140 ℃, and the heat pressing operation program is divided following three phases:
Phase I: heating precompressed exhaust phase: the time is 1-2min, pressure: normal pressure: 3.0-4.0Mpa; Lateral pressure: 4.0-5.0Mpa.
Second stage: packing stage: the time is 0.8-1min/mm, pressure: normal pressure: 4.0-5.0Mpa; Lateral pressure: 5.0-6.0Mpa.
Phase III: step-down exhaust phase: the time is 2-3min, pressure: normal pressure: 1.5-2.0Mpa; Lateral pressure: 1.0-1.5Mpa.
(7) by regulation sheet material:
Because the bamboo piece adopts the gluing of impregnation mode, the bamboo laminated plate that thermocompression bonded is processed, its surface is covered with one deck solidified glue film, influences next step moulding, must carry out processed to its surface.Planing on the bonding plane glued membrane and process the required given size sheet material of next step processing.Also can adopt sand cutting method sand to fall glued membrane, better effects if.
(8) imitative bamboo structure assembly:
Bamboo laminated plate has the mechanical characteristic of primordial bamboo, in order better to bring into play and use its mechanical characteristic, when the combining structure material; The ecosystem structural type of simulate wool bamboo carries out assembly, processes the light in structure section bar, and it is stressed big to reach the light in structure section bar; Compression and tensile strength is high; Anti-seismic performance is good, weight reduction, the target of saving material.
Its concrete assembly principle is: during the light-duty material assembly of transverse box body structure; Perpendicular two symmetries of bamboo laminated plate side cooperate, and two plates leave the 60-100mm spacing, every 300-400mm spacing in the middle of two plates; A joint that 20-30mm is thick is set, and both ends of the surface are provided with gusset piece.Such two side risers are combined as a light-duty material of overall structure by these joint.Coat thermosetting shape resin glue and prefabricated bamboo nail location at the position that joint and gusset piece contact with side riser material.As shown in Figure 1.
During the light-duty material assembly of column hollow-core construction, be in contact with one another with four bamboo laminated plate sides and face limit and be combined into hollow column body, between SMIS, every 400mm spacing makes the joint that 30-35mm is thick, and both ends of the surface are provided with the end-blocking gusset piece, pin the termination of four plates.Joint is coated thermosetting shape resin glue and prefabricated bamboo nail location with the position that gusset piece contacts with sheet material.As shown in Figure 2.
Above-mentioned joint and gusset piece are the tabular components that adopts bamboo laminated plate to process, and also can adopt timber or other material to process.
(9) moulding:
The light-duty material of imitative bamboo bamboo structure that combines is carried out thermocompression forming processing.Lower pressure is adopted in typing hot pressing, and general pressure is about 2.0Mpa, can guarantee adhesive strength, 105 ℃ of hot pressing temperatures, and time 0.8min/mm slab is thick.In addition, can also use cold pressing glue, adopt the method molding structure material of colding pressing.
(10) following process:
Processing such as sand is cut, deburring, the protection of paint front cover are carried out on surface to the integrated light-duty material of imitative bamboo structure after the typing, at last the check warehouse-in.
Claims (9)
1. the imitative integrated light-duty material of bamboo structure of a bamboo laminated plate is characterized in that: it comprises the light-duty material of transverse box body structure and the light-duty material of column hollow-core construction of the imitative bamboo structure of being processed through assembly, moulding hot pressing by bamboo laminated plate.
2. bamboo laminated plate according to claim 1 is imitated the integrated light-duty material of bamboo structure; It is characterized in that: the light-duty material of said transverse box body structure comprises two edge-on placements and bamboo laminated plate at regular intervals therebetween; And between two bamboo laminated plate opposed inside faces along laterally evenly being provided with some joint, be provided with gusset piece in the both ends of the surface of two bamboo laminated plates.
3. bamboo laminated plate according to claim 2 is imitated the integrated light-duty material of bamboo structure, it is characterized in that: adopt the resin bonding of thermosetting shape between said bamboo laminated plate and joint and the gusset piece and adopt prefabricated bamboo nail location.
4. bamboo laminated plate according to claim 3 is imitated the integrated light-duty material of bamboo structure; It is characterized in that: the spacing range of said two bamboo laminated plate medial surfaces is 60 ~ 100mm; The spacing range of per two joint is 300 ~ 400mm, and the thickness of joint is 20 ~ 30mm.
5. bamboo laminated plate according to claim 1 is imitated the integrated light-duty material of bamboo structure; It is characterized in that: the light-duty material of said column hollow-core construction comprises that four are vertically placed the bamboo laminated plate that surrounds square hollow column shape; And in hollow column, vertically evenly be provided with some joint, be provided with gusset piece in hollow column both ends of the surface.
6. bamboo laminated plate according to claim 5 is imitated the integrated light-duty material of bamboo structure, it is characterized in that: respectively the connecting between the side, adopt thermosetting shape resin bonding and adopt prefabricated bamboo nail location between joint and gusset piece and four bamboo laminated plates of said four bamboo laminated plates.
7. bamboo laminated plate according to claim 6 is imitated the integrated light-duty material of bamboo structure, it is characterized in that: the spacing range between said per two joint is 400mm, and the thickness range of joint is 30 ~ 35mm.
8. according to the imitative integrated light-duty material of bamboo structure of each described bamboo laminated plate in the claim 1 ~ 7, it is characterized in that: said bamboo laminated plate be by mao bamboon through the bamboo module unit of analysing, launching milling and processing again through the rift grain tabular component that assembly, moulding hot pressing form of mating formation; It comprises: be in contact with one another transversely arrangedly by each side of bamboo module unit, the bamboo strip of each bamboo module unit is upper surface or the top layer lamina that forms for soffit simultaneously simultaneously; Perhaps, be in contact with one another by each side of bamboo module unit transversely arranged, the sandwich layer lamina that the bamboo strip of each adjacent bamboo module unit and yellow bamboo face form for upper surface alternately; Perhaps; Contact with yellow bamboo face or bamboo strip contacts with bamboo strip and the doubling plate that forms by the yellow bamboo face of two said top layer laminas; And the rest may be inferred, and bamboo strip contacts with bamboo strip or yellow bamboo face contacts with yellow bamboo face and the even level composite board that forms between doubling plate and the doubling plate.
9. preparation method of the imitative integrated light-duty material of bamboo structure of bamboo laminated plate according to claim 1 is characterized in that comprising the step of following order:
(1) obtaining of arc bamboo piece: the mao bamboon cross cut saw is become the fixed length thick bamboo tube, the fixed length thick bamboo tube is pressed the thickness classification, splitting collides is split into thick bamboo tube the arc bamboo piece of Fixed width through cuing open;
(2) the expansion milling of arc bamboo piece: arc bamboo piece is cutd open the expansion milling machine through roller be processed into the wide bamboo piece of planar shaped uniform thickness, the outer ring of a surf green surface layer milling;
(3) the soft plasticizing heat treatment of bamboo piece: will go up a step gained bamboo piece and put into seal pot, wherein, pressure is 0.25Mpa, and temperature is 135 ℃, and temperature retention time is 30 ~ 50min;
(4) drying of bamboo piece: will go up the bamboo piece pile handled of step to the oven dry frame of return air channel type dry kiln, and push and carry out drying in the kiln, the dried water content requirement of bamboo piece is below 10%;
(5) bamboo piece impregnation: with dried bamboo piece impregnation; Bonding adhesive adopts the resorcinol modified alkyd resin glue, mixes the coupling agent KH-602 that accounts for its quality 3 ~ 5%, and the solid content of bonding adhesive is 35%; Ageing or low temperature drying be to tack-free behind the bamboo piece impregnation, bamboo piece moisture content≤12%;
(6) assembly: will go up the manual rift grain assembly of bamboo module unit of a step gained, during the lamina of group top layer, the bamboo strip of each bamboo module unit is upper surface or is soffit simultaneously that each bamboo module unit limit is in contact with one another simultaneously; During core assembly layer lamina, the bamboo strip of each adjacent bamboo module unit and yellow bamboo face are upper surface alternately, and each bamboo module unit limit is in contact with one another; During the group composite board; The yellow bamboo face of two said top layer laminas is contacted with yellow bamboo face or bamboo strip contacts with bamboo strip and forms doubling plate; And the rest may be inferred, and bamboo strip contacts with bamboo strip or yellow bamboo face contacts with yellow bamboo face and forms the even level composite board between doubling plate and the doubling plate; During the blanket spreading, the bamboo piece is the rift grain spreading longitudinally, adopts toe joint or inclined-plane overlap joint between the blanket;
(7) hot-pressed board: will go up the bamboo laminated plate hot pressing of gained behind the step assembly, hot pressing temperature is 130 ~ 140 ℃, and the heat pressing operation program is divided following three phases:
Heating precompressed exhaust phase: the time is 1 ~ 2min, pressure: normal pressure is 3.0 ~ 4.0Mpa, and lateral pressure is 4.0 ~ 5.0Mpa;
Packing stage: the time is 0.8 ~ 1min/mm, pressure: normal pressure is 4.0 ~ 5.0Mpa, and lateral pressure is 5.0 ~ 6.0Mpa;
The step-down exhaust phase: the time is 2 ~ 3min, pressure: normal pressure is 1.5 ~ 2.0Mpa, and lateral pressure is 1.0 ~ 1.5Mpa;
(8) by the specification panel: processed is carried out on the surface to the bamboo laminated plate after the last step processing, excludes the glued membrane on the bonding plane and processes the required given size sheet material of next step processing, perhaps adopts sand cutting method sand to fall glued membrane;
(9) imitative bamboo structure assembly: during the light-duty material of group transverse box body structure; The edge-on placement symmetry of the bamboo laminated plate of two last step gained is cooperated; Two plates leave 60 ~ 100mm spacing, in the middle of two plates, along horizontal per 300 ~ 400mm spacing, a joint that 20 ~ 30mm is thick are set; Both ends of the surface are provided with gusset piece, coat thermosetting shape resin glue and prefabricated bamboo nail location at the position that joint and gusset piece contact with the bamboo laminated plate material;
During the light-duty material of group column hollow-core construction; Vertically placing its side and face limit with the bamboo laminated plates of four last step gained is in contact with one another and is combined into square hollow column body; Between SMIS; Vertically every 400mm spacing is provided with a joint that 30 ~ 35mm is thick, and both ends of the surface are provided with the end-blocking gusset piece, and joint is coated thermosetting shape resin glue and prefabricated bamboo nail location with the position that gusset piece contacts with the bamboo laminated plate material;
(10) moulding: will go up the imitative bamboo structure section bar that combines of step and carry out thermocompression forming processing, lower pressure is adopted in typing hot pressing, and pressure is 2.0Mpa; Hot pressing temperature is 105 ℃; Time is that the 0.8min/mm slab is thick, perhaps, adopts cold pressing glue and colds pressing the method moulding;
(11) following process: will go up that surface that a step handles the imitative bamboo structure section bar after the typing carries out that sand is cut, deburring, paint front cover protection processing, and promptly get and imitate the integrated light-duty material of bamboo structure.
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| CN108518020A (en) * | 2018-06-15 | 2018-09-11 | 上海市建筑科学研究院 | A kind of hollow beam column component of cemented bamboo and preparation method thereof |
| CN108952011A (en) * | 2018-08-21 | 2018-12-07 | 南京林业大学 | A kind of bionical bamboo and wood composite structure and production method |
| CN109877919A (en) * | 2019-03-28 | 2019-06-14 | 南京林业大学 | A kind of integral bamboo flawless spreading bamboo plate compounding rectangular beam and processing technology |
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Application publication date: 20120718 |