CN112064881A - Heat-bridge-free prefabricated building component and preparation method thereof - Google Patents
Heat-bridge-free prefabricated building component and preparation method thereof Download PDFInfo
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- CN112064881A CN112064881A CN202010828866.7A CN202010828866A CN112064881A CN 112064881 A CN112064881 A CN 112064881A CN 202010828866 A CN202010828866 A CN 202010828866A CN 112064881 A CN112064881 A CN 112064881A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
- E04C1/40—Building elements of block or other shape for the construction of parts of buildings built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The invention relates to a heat-bridge-free prefabricated building component and a preparation method thereof, wherein the component comprises a composite material block body (1) formed by one-time extrusion and a composite material threaded rib (2) arranged inside the composite material block body (1), and the composite material block body (1) comprises the following components in parts by weight: 60-90 parts of glass fiber reinforced thermosetting resin composite material solid waste particles, 10-40 parts of bi-component polyurethane resin and 20-50 parts of glass fibers, wherein two ends of a composite material threaded rib (2) extend to the outside of a composite material block body (1), and the invention has the advantages that: the structure can be used for passive buildings to design and construct a heat-bridge-free building structure, and is simple and novel in structure and low in production cost.
Description
Technical Field
The invention relates to the technical field of passive buildings, in particular to a heat-bridge-free prefabricated building component and a preparation method thereof.
Background
In the world, with the rapid development of the building industry and the rapid enhancement of the environmental protection, the energy conservation and emission reduction of the building become important in national policies. In the development of the current building industry and a plurality of industries, especially, a great amount of solid wastes of the glass fiber reinforced thermosetting resin composite material are generated in the production and use processes of the glass fiber reinforced thermosetting resin composite material, and the solid wastes of the glass fiber reinforced thermosetting resin composite material are difficult to degrade in nature, have high recycling and processing difficulty and high cost and become a key problem restricting the development of the modern novel building composite material industry.
In modern buildings, reducing the energy consumption of the building becomes a necessary design factor in the building design, passive buildings are energy-saving buildings constructed based on passive design, and are highly emphasized by governments and building scientific communities around the world, the passive buildings can adjust the indoor temperature to a proper temperature with very small energy consumption close to zero, the passive buildings are very environment-friendly, do not need active heating, basically depend on passively collected heat to keep the building at a comfortable temperature, and the low energy consumption of the passive buildings is realized through building outer walls with high heat insulation and sound insulation and strong sealing performance and renewable energy sources; passive form building adopts no hot bridge building structure, and it is general solution to install especially thick heat preservation and install high heat-proof quality heat preservation door and window on the building outer wall and solve building outer enclosure structure heat preservation, however, some building connected node of building hardly use the outer wall heat preservation to wrap up, form the cold and hot bridge node for the building, lead to the indoor outer temperature of building at this cold and hot bridge node convection, and then lead to the failure of passive form building design and construction.
Therefore, the composite building component which is produced and prepared by utilizing the glass fiber reinforced thermosetting resin composite solid waste and has high compressive strength and low conductivity coefficient is researched and designed to be used for passive buildings, cold and hot bridge nodes of the buildings are eliminated, and the composite building component is a key problem for solving the recycling treatment of the glass fiber reinforced thermosetting resin composite solid waste and solving the design and construction of the passive buildings.
Disclosure of Invention
The invention aims to solve the defects in the prior art, provides a heat-bridge-free prefabricated building component which is high in compressive strength and low in conductivity coefficient and is prepared by utilizing composite solid waste, and a preparation method thereof, can be used for passive buildings to perform heat-bridge-free building structure design and construction, and is simple and novel in structure and low in production cost.
The technical scheme adopted by the invention is as follows: the utility model provides a no heat bridge prefabricated building component, includes the combined material block body 1 of disposable extrusion and sets up at the combined material screw thread muscle 2 of 1 inside combined material block body, combined material block body 1 includes the component of following parts by weight: 60-90 parts of glass fiber reinforced thermosetting resin composite material solid waste particles, 10-40 parts of bi-component polyurethane resin and 20-50 parts of glass fibers, wherein the diameter size of the glass fiber reinforced thermosetting resin composite material solid waste particles is less than 4mm, the A component of the bi-component polyurethane resin is isocyanate, the B component is polyol, and the weight part ratio of the A component to the B component is 105-120: 100.
The further improvement is that the composite material block body 1 comprises the following components in parts by weight: 70-80 parts of glass fiber reinforced thermosetting resin composite material solid waste particles, 20-30 parts of bi-component polyurethane resin and 30-40 parts of glass fibers.
The further improvement is that the two ends of the composite material screw thread rib 2 extend to the outside of the composite material building block body 1.
A preparation method of a heat bridge-free prefabricated building component comprises the following steps:
step one, preparing a composite material threaded rib 2, cutting a raw material section according to a required length, and preparing a plurality of composite material threaded ribs 2;
crushing the solid waste of the glass fiber reinforced thermosetting resin composite material, and screening particles with the diameter of less than 4mm by a 5-10-mesh sieve;
weighing glass fiber reinforced thermosetting resin composite material solid waste particles and glass fibers according to the weight parts of the components, putting the glass fiber reinforced thermosetting resin composite material solid waste particles and the glass fibers into a stirrer, stirring and mixing to form a particulate mixture, weighing double-component polyurethane resin according to the weight parts of the components, and preparing a building block mixed raw material by adopting a stirring mixing process or a vacuum mixing process;
assembling the extrusion forming mold, and uniformly spraying a release agent on the inner wall of the cavity of the extrusion forming mold;
putting the building block body mixed raw material into a cavity of an extrusion forming die, and inserting a plurality of composite material threaded ribs 2 into the building block body mixed raw material through reserved through holes of a model plate of the extrusion forming die;
step six, arranging a pressing plate above the extrusion forming mold, applying certain pressure, and curing and forming the composite material block body 1 and the composite material threaded rib 2 through foaming curing reaction for certain time;
and step seven, disassembling the extrusion forming die, demolding and taking out the finished component.
Compared with the prior art, the invention has the following beneficial effects:
1) the composite material building block body comprises the solid waste particle components of the glass fiber reinforced thermosetting resin composite material, is beneficial to the recovery, treatment and reutilization of the solid waste of the glass fiber reinforced thermosetting resin composite material, and is beneficial to environmental protection, and the produced and prepared member has high compressive strength and low conductivity coefficient.
2) The composite material screw thread rib is arranged inside the composite material block body, and the two ends of the composite material screw thread rib extend to the outside of the composite material block body, so that the structure is simple and novel, the integral strength of the component can be increased, and the building structure connection is facilitated.
3) The extrusion forming die is adopted, one-time extrusion forming is carried out, the production and preparation process is mature, and the production cost is low.
Drawings
Figure 1 is a schematic structural view of the present invention,
fig. 2 is a top view of fig. 1.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
As shown in fig. 1 and 2, a heat bridge-free prefabricated building component comprises a composite material block body 1 formed by one-time extrusion molding and a composite material threaded rib 2 arranged inside the composite material block body 1, wherein the composite material block body 1 comprises the following components in parts by weight: 60-90 parts of glass fiber reinforced thermosetting resin composite material solid waste particles, 10-40 parts of bi-component polyurethane resin and 20-50 parts of glass fibers, wherein the diameter size of the glass fiber reinforced thermosetting resin composite material solid waste particles is less than 4mm, the A component of the bi-component polyurethane resin is isocyanate, the B component is polyol, and the weight part ratio of the A component to the B component is 105-120: 100. The two ends of the composite material screw rib 2 extend to the outside of the composite material block body 1.
In the preferred embodiment of the present invention, the composite material block body 1 comprises the following components in parts by weight: 70-80 parts of glass fiber reinforced thermosetting resin composite material solid waste particles, 20-30 parts of bi-component polyurethane resin and 30-40 parts of glass fibers.
The invention also provides a preparation method of the heat-bridge-free prefabricated building component, which comprises the following steps:
step one, preparing a composite material threaded rib 2, cutting a raw material section according to a required length, and preparing a plurality of composite material threaded ribs 2;
preparing a composite threaded rib 2 by using pultrusion equipment and rotary winding equipment, manufacturing a matrix by using long glass fibers soaked with polyurethane resin glue through the pultrusion equipment, spirally winding the long glass fibers soaked with the polyurethane resin glue on the outer surface of the matrix through the rotary winding equipment, curing to form a composite threaded rib raw material profile, and finally cutting the raw material profile according to the required length through cutting equipment to prepare a plurality of composite threaded ribs 2;
crushing the solid waste of the glass fiber reinforced thermosetting resin composite material, and screening particles with the diameter of less than 4mm by a 5-10-mesh sieve;
recycling and classifying the glass fiber reinforced thermosetting resin composite material solid waste, crushing by using a crusher, and screening;
weighing glass fiber reinforced thermosetting resin composite material solid waste particles and glass fibers according to the weight parts of the components, putting the glass fiber reinforced thermosetting resin composite material solid waste particles and the glass fibers into a stirrer, stirring and mixing to form a particulate mixture, weighing double-component polyurethane resin according to the weight parts of the components, and preparing a building block mixed raw material by adopting a stirring mixing process or a vacuum mixing process;
the preferred stirring and mixing process is as follows: simultaneously injecting the particle mixture and the double-component polyurethane resin into a stirrer for stirring and mixing to prepare a block mixed raw material;
the preferred vacuum mixing process is: firstly, placing the particulate matter mixture into a prefabricated plastic bag, then injecting the double-component polyurethane resin into the prefabricated plastic bag, and finally sealing and vacuumizing the plastic bag to fully infiltrate the double-component polyurethane resin into the particulate matter mixture for mixing to prepare a block mixed raw material;
the preparation process of the bi-component polyurethane resin comprises the following steps: respectively injecting the component A and the component B into a charging bucket according to the weight part ratio of the component A to the component B, and stirring and mixing;
assembling the extrusion forming mold, and uniformly spraying a release agent on the inner wall of the cavity of the extrusion forming mold;
the extrusion forming mold is a split type mold and is provided with a plurality of model plates, the extrusion forming mold is formed into an integral extrusion forming mold through assembling operation, a connecting and positioning structure is arranged between the model plates, reserved through holes are formed in the model plates, and a release agent is uniformly sprayed on the inner wall of each model plate so as to facilitate demolding after molding;
putting the building block body mixed raw material into a cavity of an extrusion forming die, and inserting a plurality of composite material threaded ribs 2 into the building block body mixed raw material through reserved through holes of a model plate of the extrusion forming die;
step six, arranging a pressing plate above the extrusion forming mold, applying certain pressure, and curing and forming the composite material block body 1 and the composite material threaded rib 2 through foaming curing reaction for certain time;
and step seven, disassembling the extrusion forming die, demolding and taking out the finished component.
Without being limited thereto, any changes or substitutions that are not thought of through the inventive work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (4)
1. The utility model provides a no heat bridge prefabricated building component which characterized in that, including disposable extrusion's combined material block body (1) and set up at combined material screw thread muscle (2) of combined material block body (1) inside, combined material block body (1) includes the component of following parts by weight: 60-90 parts of glass fiber reinforced thermosetting resin composite material solid waste particles, 10-40 parts of bi-component polyurethane resin and 20-50 parts of glass fibers, wherein the diameter size of the glass fiber reinforced thermosetting resin composite material solid waste particles is less than 4mm, the A component of the bi-component polyurethane resin is isocyanate, the B component is polyol, and the weight part ratio of the A component to the B component is 105-120: 100.
2. The prefabricated building component without heat bridge according to claim 1, wherein said composite block body (1) comprises the following components in parts by weight: 70-80 parts of glass fiber reinforced thermosetting resin composite material solid waste particles, 20-30 parts of bi-component polyurethane resin and 30-40 parts of glass fibers.
3. A non-heat bridge prefabricated building component according to claim 1, wherein both ends of said composite material screw rib (2) extend to the outside of said composite material block body (1).
4. The method for preparing a heat-bridge-free prefabricated building component based on claim 1, which comprises the following steps:
step one, preparing a composite material threaded rib (2), cutting a raw material section according to a required length, and preparing a plurality of composite material threaded ribs (2);
crushing the solid waste of the glass fiber reinforced thermosetting resin composite material, and screening particles with the diameter of less than 4mm by a 5-10-mesh sieve;
weighing glass fiber reinforced thermosetting resin composite material solid waste particles and glass fibers according to the weight parts of the components, putting the glass fiber reinforced thermosetting resin composite material solid waste particles and the glass fibers into a stirrer, stirring and mixing to form a particulate mixture, weighing double-component polyurethane resin according to the weight parts of the components, and preparing a building block mixed raw material by adopting a stirring mixing process or a vacuum mixing process;
assembling the extrusion forming mold, and uniformly spraying a release agent on the inner wall of the cavity of the extrusion forming mold;
putting the building block body mixed raw material into a cavity of an extrusion forming die, and inserting a plurality of composite material threaded ribs (2) into the building block body mixed raw material through reserved through holes of a model plate of the extrusion forming die;
step six, arranging a pressing plate above the extrusion forming mold, applying certain pressure, and curing and forming the composite material block body (1) and the composite material threaded rib (2) through foaming curing reaction for certain time;
and step seven, disassembling the extrusion forming die, demolding and taking out the finished component.
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| CN202010828866.7A CN112064881A (en) | 2020-08-12 | 2020-08-12 | Heat-bridge-free prefabricated building component and preparation method thereof |
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Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587576A (en) * | 2004-09-02 | 2005-03-02 | 北京玻璃钢研究设计院 | Composite material threaded rib and preparation method thereof |
| CN1944837A (en) * | 2003-09-15 | 2007-04-11 | 邱则有 | Light mould member for cast-in-situ concrete |
| CN102505777A (en) * | 2011-10-16 | 2012-06-20 | 张宗楼 | Heat preservation system for large-scale horizontal hole composite sandwich heat-preservation wallboard |
| CN102643013A (en) * | 2012-04-28 | 2012-08-22 | 浙江德和绝热科技有限公司 | Method of using waste glass fiber reinforced phenolic resin molding compound to produce foam glass |
| CN102962938A (en) * | 2012-12-03 | 2013-03-13 | 南京红宝丽新材料有限公司 | Method for manufacturing composite thermal insulation board by utilizing rigid waste polyurethane foam and straws |
| CN203412178U (en) * | 2013-08-12 | 2014-01-29 | 杜霄鹤 | Light composite self-insulating building block |
| CN203701408U (en) * | 2014-02-24 | 2014-07-09 | 温州华星建材检测有限公司 | Cement based composite material hollow prefabricated component restricted by double layers of hoops |
| CN104047423A (en) * | 2014-05-14 | 2014-09-17 | 中建七局第二建筑有限公司 | Mold and construction method for precisely reserving hole in floorslab |
| CN204054589U (en) * | 2014-06-30 | 2014-12-31 | 上海永玺环境科技有限公司 | The extrusion die of RPVC foam building template |
| CN205653972U (en) * | 2016-02-17 | 2016-10-19 | 深圳市新天能科技开发有限公司 | Environment -friendly building structure external member |
| CN107265930A (en) * | 2016-02-15 | 2017-10-20 | 广州市宜维爱科技有限公司 | A kind of method for recycling heterogeneous solid waste |
| CN107603189A (en) * | 2017-09-08 | 2018-01-19 | 绵阳旺通科技有限公司 | A kind of preparation method of environmentally-friendly low-cost polyurethane ceiling tile materials |
| CN208518189U (en) * | 2018-06-25 | 2019-02-19 | 刘海霞 | A kind of Assembled self-insulating building element |
| CN109612793A (en) * | 2018-12-05 | 2019-04-12 | 东南大学 | Band rib material based on drawing mould enhances cement-base composite material test material preparation method |
| CN110281381A (en) * | 2019-05-30 | 2019-09-27 | 东南大学 | The preparation method of muscle material enhancing cement-base composite material test specimen based on beam type pull-out test |
| CN209491899U (en) * | 2018-09-08 | 2019-10-15 | 邛崃三柚建筑机械有限公司 | A kind of reserved steel bar positioning punch die of assembled architecture prefabricated components |
| CN209868948U (en) * | 2019-04-30 | 2019-12-31 | 巩义市相济装配构件有限公司 | Concrete antiseep device |
| CN110625852A (en) * | 2019-09-24 | 2019-12-31 | 四川英创力电子科技股份有限公司 | Method for resource utilization of prepreg corner waste |
| CN110713372A (en) * | 2019-12-07 | 2020-01-21 | 江苏宏盛环保科技有限公司 | Autoclaved aerated concrete block for integrated wall system and preparation method thereof |
| CN210705283U (en) * | 2019-07-29 | 2020-06-09 | 鹤壁东江建筑工业科技有限公司 | Concrete member forming die convenient to reinforcing bar location |
-
2020
- 2020-08-12 CN CN202010828866.7A patent/CN112064881A/en active Pending
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1944837A (en) * | 2003-09-15 | 2007-04-11 | 邱则有 | Light mould member for cast-in-situ concrete |
| CN1587576A (en) * | 2004-09-02 | 2005-03-02 | 北京玻璃钢研究设计院 | Composite material threaded rib and preparation method thereof |
| CN102505777A (en) * | 2011-10-16 | 2012-06-20 | 张宗楼 | Heat preservation system for large-scale horizontal hole composite sandwich heat-preservation wallboard |
| CN102643013A (en) * | 2012-04-28 | 2012-08-22 | 浙江德和绝热科技有限公司 | Method of using waste glass fiber reinforced phenolic resin molding compound to produce foam glass |
| CN102962938A (en) * | 2012-12-03 | 2013-03-13 | 南京红宝丽新材料有限公司 | Method for manufacturing composite thermal insulation board by utilizing rigid waste polyurethane foam and straws |
| CN203412178U (en) * | 2013-08-12 | 2014-01-29 | 杜霄鹤 | Light composite self-insulating building block |
| CN203701408U (en) * | 2014-02-24 | 2014-07-09 | 温州华星建材检测有限公司 | Cement based composite material hollow prefabricated component restricted by double layers of hoops |
| CN104047423A (en) * | 2014-05-14 | 2014-09-17 | 中建七局第二建筑有限公司 | Mold and construction method for precisely reserving hole in floorslab |
| CN204054589U (en) * | 2014-06-30 | 2014-12-31 | 上海永玺环境科技有限公司 | The extrusion die of RPVC foam building template |
| CN107265930A (en) * | 2016-02-15 | 2017-10-20 | 广州市宜维爱科技有限公司 | A kind of method for recycling heterogeneous solid waste |
| CN205653972U (en) * | 2016-02-17 | 2016-10-19 | 深圳市新天能科技开发有限公司 | Environment -friendly building structure external member |
| CN107603189A (en) * | 2017-09-08 | 2018-01-19 | 绵阳旺通科技有限公司 | A kind of preparation method of environmentally-friendly low-cost polyurethane ceiling tile materials |
| CN208518189U (en) * | 2018-06-25 | 2019-02-19 | 刘海霞 | A kind of Assembled self-insulating building element |
| CN209491899U (en) * | 2018-09-08 | 2019-10-15 | 邛崃三柚建筑机械有限公司 | A kind of reserved steel bar positioning punch die of assembled architecture prefabricated components |
| CN109612793A (en) * | 2018-12-05 | 2019-04-12 | 东南大学 | Band rib material based on drawing mould enhances cement-base composite material test material preparation method |
| CN209868948U (en) * | 2019-04-30 | 2019-12-31 | 巩义市相济装配构件有限公司 | Concrete antiseep device |
| CN110281381A (en) * | 2019-05-30 | 2019-09-27 | 东南大学 | The preparation method of muscle material enhancing cement-base composite material test specimen based on beam type pull-out test |
| CN210705283U (en) * | 2019-07-29 | 2020-06-09 | 鹤壁东江建筑工业科技有限公司 | Concrete member forming die convenient to reinforcing bar location |
| CN110625852A (en) * | 2019-09-24 | 2019-12-31 | 四川英创力电子科技股份有限公司 | Method for resource utilization of prepreg corner waste |
| CN110713372A (en) * | 2019-12-07 | 2020-01-21 | 江苏宏盛环保科技有限公司 | Autoclaved aerated concrete block for integrated wall system and preparation method thereof |
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