A method for manufacturing a constrained biomass bamboo aggregate precast structure

Abstract

The application provides a manufacturing method of a constrained biomass bamboo aggregate prefabricated structure, which comprises a constraint pipe, a track pipe, a jack, a piston, a loading steel plate, biomass bamboo aggregate, a stock bin, a locking frame, a self-balancing counterforce frame and a bottom mold plate, the biomass bamboo aggregate is cut into blocky particles and soaked in a glue adhesive, the stock bin arranged at the opening of the outer side surface of the track pipe is used to fill the cavity of the track pipe, the vertical load is applied to the biomass bamboo aggregate filled in the cavity of the track pipe through the jack, the piston and the loading steel plate in sequence along the longitudinal axis direction of the track pipe, so that the biomass bamboo aggregate is compacted and filled in the cavity of the constraint pipe, the application can conveniently and quickly realize the one-time compression molding of the constrained biomass bamboo aggregate prefabricated structure, is flexible and convenient, simple to operate, can be manufactured in a factory, effectively improves the production efficiency and is low in cost.

Description

Technical Field

[0001] This invention relates to a method for manufacturing a prefabricated structure using constrained biomass bamboo aggregate, belonging to the field of civil engineering structural engineering. Background Technology

[0002] With increasing public awareness of environmental protection and growing emphasis on the sustainable development of the construction industry, the vigorous development of green and environmentally friendly new building materials is an inevitable trend in civil engineering. Bamboo occupies a significant position in the world's forest resources, often referred to as the "second forest." There are over 70 genera and more than 1200 species of bamboo worldwide. my country boasts abundant bamboo resources and a long history of cultivation and utilization, earning it the reputation of "Kingdom of Bamboo." Statistics show that my country has approximately 40 genera and over 500 species of bamboo. Due to its unique internal structure, bamboo possesses numerous advantages in terms of physical and mechanical properties, including high strength, good toughness, good plasticity, excellent tensile, compressive, and bending resistance, low density, and a strength-to-weight ratio higher than ordinary wood, steel, and concrete. Bamboo is a renewable resource, with low energy consumption in its production and construction, and minimal environmental pollution.

[0003] However, natural bamboo has defects such as anisotropy, poor fire resistance, poor dimensional stability, susceptibility to mold and corrosion, and limited strength. Directly using bamboo as a building material cannot meet the basic requirements of modern building structures for material mechanical properties. Therefore, in response to the defects and shortcomings of natural bamboo, various bamboo engineering materials such as bamboo plywood, bamboo laminated lumber, bamboo engineered lumber, and reconstituted bamboo have been developed. However, engineering bamboo materials still have problems such as limited cross-sectional dimensions, low stiffness, complex processing technology, and low bamboo utilization rate. To address these issues, existing technologies have proposed various reinforced bamboo component construction forms and their processing and manufacturing methods. The aim is to improve the utilization rate of bamboo by improving structural design and processing technology, and to overcome the defects of existing bamboo structures, so that bamboo can be applied more widely and effectively in the field of modern construction.

[0004] For example, Chinese patent CN109808011A discloses a pressure-impregnated flame-retardant type glued bamboo component, including a first glued bamboo layer, a second glued bamboo layer, and several layers of glued bamboo layers disposed between the first and second glued bamboo layers. The glued bamboo layers are formed by hot pressing several bamboo strips together with adhesive. Although this processing method is simple, it still cannot significantly improve the load-bearing capacity and material utilization rate of the structure. Moreover, uneven bonding strength is prone to occur during the hot pressing process, leading to unstable overall performance of the board. Another example is Chinese patent CN113958064A, which discloses a steel-bamboo composite column and its construction method, including a round steel pipe, a bamboo pipe, and connectors. The bamboo pipe and the round steel pipe are first bonded with epoxy resin adhesive through connectors, and then fastened with a ring. The ring tightly fits the bamboo pipe and the round steel pipe, and the end of the ring is connected by bolts. In this structure, the semi-circular bamboo tubes set outside the round steel tubes are prone to problems such as insufficient strength and uneven stress performance. Furthermore, the connection between the bamboo tubes and the round steel tubes requires strict control over the application conditions of the epoxy resin adhesive, the quality of the ring belt, and the tightening force, making the connection quite complex. Summary of the Invention

[0005] The purpose of this invention is to provide a method for manufacturing a prefabricated structure using constrained biomass bamboo aggregate. Through innovation in construction process and structure, a reusable track tube is used as the track for transporting the biomass bamboo aggregate. Vertical loads are applied using loading devices such as jacks, pistons, and loading steel plates to quickly and compactly press the biomass bamboo aggregate into the constrained tube. At the same time, a hopper on the top surface of the track tube continuously replenishes the biomass bamboo aggregate into the track tube. The entire pressing process is carried out in a self-balancing reaction frame to ensure stability and balance, achieving one-time pressing molding of the prefabricated structure using constrained biomass bamboo aggregate. This method is flexible, convenient, and simple to operate, and can be factory-produced, effectively improving production efficiency and material utilization.

[0006] The technical solution of this invention is: a method for manufacturing a prefabricated structure using constrained biomass bamboo aggregate, characterized by comprising a constraining tube, a track tube, a jack, a piston, a loading steel plate, biomass bamboo aggregate, a silo, a locking frame, a self-balancing reaction frame, and a bottom template. The constraining tube, track tube, jack, piston, and loading steel plate are placed sequentially along the longitudinal axis within the inner frame of the self-balancing reaction frame. The constraining tube and track tube are fixed and locked by the locking frame. The constraining tube and track tube are arranged perpendicularly butt-jointed. The bottom template is closed on the outer end face of the constraining tube. The constraining tube and track tube are hollow inside with identical hollow cross-sections. The constraining tube and track tube can be freely connected, detached, and replaced. The biomass bamboo aggregate is cut into block particles and soaked in adhesive. The structure is constructed through an opening on the outer side of the track tube. The material hopper is filled into the cavity of the track tube. The reusable track tube serves as the transport track for the biomass bamboo aggregate. Along the longitudinal axis of the track tube, jacks, a retractable piston, and a loading steel plate sequentially apply a vertical load to the biomass bamboo aggregate filling the cavity of the track tube, compacting and filling the cavity of the constraint tube. A heating medium is placed around the constraint tube. The constraint tube filled with compacted biomass bamboo aggregate is then cured at a stable high temperature of 100℃~200℃ through the heating medium. Alternatively, the constraint tube can be removed and moved into a curing chamber for high-temperature curing at 100℃~200℃. This process achieves the pressing and molding of the constraint tube filled with biomass bamboo aggregate structure. The entire pressing process is carried out within the internal frame of a self-balancing reaction frame to ensure stability and balance. The specific steps are as follows:

[0007] 1) Processing biomass bamboo aggregate: Biomass bamboo aggregate is formed by cutting raw bamboo into block-shaped particles with an aspect ratio of 1 to 3 and a thickness of 2 mm to 30 mm, and then soaking them in adhesive to form biomass bamboo aggregate.

[0008] 2) Fixed constraint tube: The constraint tube and the track tube are connected and fixed perpendicularly along the longitudinal axis to form a cavity with a completely closed cross-section. The bottom template is closed on the outer end face of the constraint tube. The constraint tube and the track tube are supported and fixed on all four sides by a locking frame.

[0009] 3) Filling with biomass bamboo aggregate: Fill the internal cavity of the track pipe with biomass bamboo aggregate from the hopper set on the outer side of the track pipe. The biomass bamboo aggregate is piled up in the track pipe in a loose state.

[0010] 4) Compacting biomass bamboo aggregate: The track tube serves as the transport track for biomass bamboo aggregate. Along the longitudinal axis of the constraint tube, jacks, pistons, and loading steel plates sequentially apply vertical loads to the biomass bamboo aggregate inside the track tube cavity, pushing the biomass bamboo aggregate inside the track tube cavity into the constraint tube. The piston can freely extend and retract to adapt to changes in the length of the track tube and the constraint tube. Through the reciprocating cycle of the piston and the compaction process, biomass bamboo aggregate is continuously replenished into the track tube through the hopper, so that the compacted biomass bamboo aggregate fills the internal cavity of the constraint tube.

[0011] 5) Enclosed curing: The confinement tube is surrounded by a heating medium. The confinement tube filled with compacted biomass bamboo aggregate is cured at a stable high temperature of 100℃~200℃ through the heating medium, or the confinement tube is removed and moved into the curing room for curing at a high temperature of 100℃~200℃.

[0012] 6) Complete the manufacturing of one type of constrained biomass bamboo aggregate prefabricated structure, repeat the above steps, and complete the manufacturing of the next type of constrained biomass bamboo aggregate prefabricated structure.

[0013] The impregnation adhesive for the biomass bamboo aggregate is one of epoxy resin, epoxy mortar, phenolic resin, polyethylene resin, or furfuryl alcohol resin.

[0014] The inner hollow cross-section dimensions and shapes of the constraint tube and the track tube are consistent, and are one of the following: circular, rectangular, elliptical, chamfered rectangle, or polygon with more than 4 sides.

[0015] The restraint tube and track tube are made of one of the following materials: carbon steel tube, stainless steel tube, galvanized steel tube, aluminum tube, copper tube, plastic tube, composite material tube, or bamboo tube.

[0016] The wall thickness of the constraint tube and track tube is 1mm to 10mm.

[0017] The cross-sectional shape and size of the loading steel plate are consistent with the shape and size of the internal cavity of the constraint tube and the track tube. It is a circle, rectangle, ellipse, chamfered rectangle or a polygon with more than 4 sides, and the thickness is 5mm to 10cm.

[0018] The heating medium surrounding the confinement tube is one of water, steam, mineral oil, or liquid paraffin.

[0019] The compacted biomass bamboo aggregate has a volume compression rate of 5% to 80%.

[0020] This invention has significant advantages and the following beneficial effects:

[0021] 1) The biomass bamboo aggregate used in this invention is derived from nature, is renewable and sustainable, is easy to obtain, easy to process, and is green and environmentally friendly, meeting the industry demand of my country's vigorous promotion of green building and sustainable building materials; moreover, the biomass bamboo aggregate is lightweight and high-strength, and when used to fill pipes, it ensures the structural load-bearing capacity and deformation capacity while reducing the structural weight.

[0022] 2) Biomass bamboo aggregate is significantly improved in various properties through adhesive impregnation modification. At the same time, high-temperature curing also enables rapid and tight bonding between biomass bamboo aggregate and constraint pipe. Using biomass bamboo aggregate to make prefabricated structures results in high material utilization.

[0023] 3) Biomass bamboo aggregate is filled into the confinement tube to form an integrated prefabricated structure, giving full play to the advantages of biomass bamboo aggregate and confinement tube materials, complementing each other and achieving a comprehensive effect greater than the sum of its parts.

[0024] 4) Reusable track tubes are used as the tracks for transporting biomass bamboo aggregates. Simple loading devices such as jacks, pistons, and loading steel plates are used to apply loads, quickly and compactly pressing the biomass bamboo aggregates into the confining tubes. At the same time, the hopper on the top of the track tube continuously replenishes the biomass bamboo aggregates into the track tube. This method achieves one-time pressing and molding of the prefabricated structure of confined biomass bamboo aggregates using economical and technical means. It is flexible, convenient, and easy to operate. It can be manufactured in factories, saving construction time and labor, effectively improving production efficiency, and has low cost and good economic benefits.

[0025] 5) The manufacturing method of the provided constrained biomass bamboo aggregate prefabricated structure is carried out in a self-balancing reaction frame, which ensures the stability and balance of the entire manufacturing process. Attached Figure Description

[0026] Figure 1 This is a construction flow chart of a manufacturing method for prefabricated structures made of constrained biomass bamboo aggregate.

[0027] Figure 2 This is a schematic diagram showing the preparation of various devices before compacting biomass bamboo aggregate.

[0028] Figure 3 This is a schematic diagram of biomass bamboo aggregate being poured into the track pipe from the silo;

[0029] Figure 4 This is a schematic diagram showing how biomass bamboo aggregate is transported from the track tube to the constraint tube via a piston extension on one side.

[0030] Figure 5 This is a schematic diagram showing how biomass bamboo aggregate is gradually compacted by being extended by a piston on one side.

[0031] Figure 6 This is a schematic diagram showing the complete compaction of biomass bamboo aggregate inside a confinement tube.

[0032] Figure 7 This is a schematic diagram of the final forming of a prefabricated structure made of constrained biomass bamboo aggregate.

[0033] In the attached diagram, 1 is the constraint tube, 2 is the track tube, 3 is the jack, 4 is the piston, 5 is the loading steel plate, 6 is the biomass bamboo aggregate, 7 is the hopper, 8 is the locking frame, 9 is the self-balancing reaction frame, and 10 is the bottom template. Detailed Implementation

[0034] The specific embodiments of the present invention are further described below. A method for manufacturing a prefabricated structure of constrained biomass bamboo aggregate is characterized by comprising a constraining pipe 1, a track pipe 2, a jack 3, a piston 4, a loading steel plate 5, biomass bamboo aggregate 6, a hopper 7, a locking frame 8, a self-balancing reaction frame 9, and a bottom template 10. The constraining pipe 1, track pipe 2, jack 3, piston 4, and loading steel plate 5 are placed sequentially along the longitudinal axis in the inner frame of the self-balancing reaction frame 9. The constraining pipe 1 and track pipe 2 are fixed and locked by the locking frame 8. The constraining pipe 1 and track pipe 2 are arranged vertically butt-to-button. The bottom template 10 is closed on the outer end face of the constraining pipe 1. The constraining pipe 1 and track pipe 2 are hollow inside with the same internal cross-section. The constraining pipe 1 and track pipe 2 can be freely connected, detached, and replaced. The biomass bamboo aggregate 6 is cut into block particles and soaked in adhesive. The material is placed through the opening on the outer side of the track pipe 2. The material hopper 7 is filled into the cavity of the track pipe 2. The reusable track pipe 2 serves as the transport track for the biomass bamboo aggregate 6. A vertical load is applied to the biomass bamboo aggregate 6 filled into the cavity of the track pipe 2 via a jack 3, a retractable piston 4, and a loading steel plate 5, sequentially along the longitudinal axis of the track pipe 2. This compacts the biomass bamboo aggregate 6 and fills the cavity of the constraint pipe 1. A heating medium is placed around the constraint pipe 1. The constraint pipe 1, filled with compacted biomass bamboo aggregate 6, is then cured at a stable high temperature of 100℃~200℃ using the heating medium. Alternatively, the constraint pipe 1 can be removed and moved into a curing chamber for high-temperature curing at 100℃~200℃. This process achieves the pressing and molding of the constraint pipe 1 filled with biomass bamboo aggregate 6. The entire pressing process is carried out within the internal frame of the self-balancing reaction frame 9 to ensure stability and balance. The specific steps are as follows:

[0035] 1) Processing biomass bamboo aggregate 6: Biomass bamboo aggregate 6 is formed by cutting and processing raw bamboo into block-shaped particles with an aspect ratio of 1 to 3 and a thickness of 2 mm to 30 mm, and then soaking them in adhesive to form biomass bamboo aggregate 6.

[0036] 2) Fixed constraint tube 1: The constraint tube 1 and the track tube 2 are connected and fixed perpendicularly along the longitudinal axis to form a cavity with a completely closed cross section. The bottom template 10 is closed on the outer end face of the constraint tube 1. The constraint tube 1 and the track tube 2 are supported and fixed on all four sides by the locking frame 8.

[0037] 3) Filling in biomass bamboo aggregate 6: Fill the biomass bamboo aggregate 6 into the internal cavity of the track pipe 2 from the hopper 7 set on the outer side of the track pipe 2. The biomass bamboo aggregate 6 is piled up in the track pipe 2 in a loose state.

[0038] 4) Compacting biomass bamboo aggregate 6: The track pipe 2 serves as the transport track for the biomass bamboo aggregate 6. Along the longitudinal axis of the constraint pipe 1, the jack 3, piston 4, and loading steel plate 5 sequentially apply vertical load pressure to the biomass bamboo aggregate 6 in the cavity of the track pipe 2, pushing the biomass bamboo aggregate 6 in the cavity of the track pipe 2 into the constraint pipe 1. The piston 4 can freely extend and retract to adapt to the length changes of the track pipe 2 and the constraint pipe 1. Through the reciprocating cycle of the piston 4 and the compaction process, the biomass bamboo aggregate 6 is continuously replenished into the track pipe 2 through the hopper 7, so that the compacted biomass bamboo aggregate 6 fills the internal cavity of the constraint pipe 1.

[0039] 5) Enclosed curing: The confinement tube 1 is surrounded by a heating medium. The confinement tube 1, which is filled with compacted biomass bamboo aggregate 6, is cured at a stable high temperature of 100℃~200℃ through the heating medium, or the confinement tube 1 is removed and moved into the curing room for curing at a high temperature of 100℃~200℃.

[0040] 6) Complete the manufacturing of one type of constrained biomass bamboo aggregate prefabricated structure, repeat the above steps, and complete the manufacturing of the next type of constrained biomass bamboo aggregate prefabricated structure.

[0041] The impregnating adhesive for biomass bamboo aggregate 6 is one of epoxy resin, epoxy mortar, phenolic resin, polyethylene resin, or furfuryl alcohol resin.

[0042] The inner hollow cross-sections of the constraint tube 1 and the track tube 2 have the same dimensions and shape, and are either circular, rectangular, elliptical, chamfered rectangle, or a polygon with more than 4 sides.

[0043] The restraint tube 1 and the track tube 2 are made of carbon steel, stainless steel, galvanized steel, aluminum, copper, plastic, composite material, or bamboo.

[0044] The wall thickness of the constraint tube 1 and the track tube 2 is 1mm to 10mm.

[0045] The cross-sectional shape and dimensions of the loading steel plate 5 are consistent with the internal cavity shape and dimensions of the constraint tube 1 and the track tube 2. It is a circle, rectangle, ellipse, chamfered rectangle or a polygon with more than 4 sides, and the thickness is 5mm to 10cm.

[0046] The heating medium surrounding the constraint tube 1 is one of water, steam, mineral oil, or liquid paraffin.

[0047] The volume compression rate of compacted biomass bamboo aggregate 6 is 5% to 80%.

Claims

1. A method for manufacturing a prefabricated structure using constrained biomass bamboo aggregate, characterized in that... The system includes a constraint tube (1), a track tube (2), a jack (3), a piston (4), a loading steel plate (5), biomass bamboo aggregate (6), a hopper (7), a locking frame (8), a self-balancing reaction frame (9), and a bottom template (10). The constraint tube (1), track tube (2), jack (3), piston (4), and loading steel plate (5) are placed sequentially along the longitudinal axis in the internal frame of the self-balancing reaction frame (9). The constraint tube (1) and track tube (2) are fixed and locked by the locking frame (8). The constraint tube (1) and track tube (2) are arranged vertically and connected. The bottom template (10) is closed on the outer end face of the constraint tube (1). The constraint tube (1) and track tube (2) are hollow inside and have the same hollow cross section. The constraint tube (1) and track tube (2) can be freely connected, disconnected, and replaced. The biomass bamboo aggregate (6) is cut into block particles and soaked in adhesive. It is placed through the opening on the outer side of the track tube (2). The material hopper (7) is filled into the cavity of the track tube (2). The reusable track tube (2) serves as the transport track for the biomass bamboo aggregate (6). Along the longitudinal axis of the track tube (2), the jack (3), the telescopic piston (4), and the loading steel plate (5) sequentially apply vertical loads to the biomass bamboo aggregate (6) filled in the cavity of the track tube (2), so that the biomass bamboo aggregate (6) is compacted and fills the cavity of the constraint tube (1). A heating medium is set around the constraint tube (1). The constraint tube (1) filled with compacted biomass bamboo aggregate (6) is stably cured at a high temperature of 100℃~200℃ through the heating medium, or the constraint tube (1) is removed and moved into the curing room for high temperature curing at 100℃~200℃. This realizes the pressing and molding of the constraint tube (1) filled with biomass bamboo aggregate (6). The entire pressing process is carried out in the internal frame of the self-balancing reaction frame (9) to ensure stability and balance. The specific steps are as follows: 1) Processing biomass bamboo aggregate (6): Biomass bamboo aggregate (6) is formed by cutting and processing raw bamboo into block-shaped particles with an aspect ratio of 1 to 3 and a thickness of 2 mm to 30 mm, and soaking them in adhesive to form biomass bamboo aggregate (6); 2) Fixed constraint tube (1): The constraint tube (1) and the track tube (2) are connected and fixed vertically along the longitudinal axis to form a cavity with a completely closed cross section. The bottom template (10) is closed on the outer end face of the constraint tube (1). The constraint tube (1) and the track tube (2) are supported and fixed on all sides by the locking frame (8). 3) Filling in biomass bamboo aggregate (6): Fill the internal cavity of the track pipe (2) with biomass bamboo aggregate (6) through the hopper (7) set on the outer side of the track pipe (2). The biomass bamboo aggregate (6) is piled up in the track pipe (2) in a loose state. 4) Compacting biomass bamboo aggregate (6): The track pipe (2) serves as the transport track for biomass bamboo aggregate (6). Along the longitudinal axis of the constraint pipe (1), the jack (3), piston (4), and loading steel plate (5) sequentially apply vertical load pressure to the biomass bamboo aggregate (6) in the cavity of the track pipe (2), pushing the biomass bamboo aggregate (6) in the cavity of the track pipe (2) into the constraint pipe (1). The piston (4) can freely extend and retract to adapt to the length changes of the track pipe (2) and the constraint pipe (1). Through the reciprocating cycle of the piston (4) and the compaction process, biomass bamboo aggregate (6) is continuously replenished into the track pipe (2) through the hopper (7), so that the compacted biomass bamboo aggregate (6) fills the internal cavity of the constraint pipe (1). 5) Closed curing: The heating medium is set around the constraint tube (1). The constraint tube (1) filled with compacted biomass bamboo aggregate (6) is cured at a stable high temperature of 100℃~200℃ through the heating medium, or the constraint tube (1) is removed and moved into the curing room for curing at a high temperature of 100℃~200℃. 6) Complete the manufacturing of one type of constrained biomass bamboo aggregate prefabricated structure, repeat the above steps, and complete the manufacturing of the next type of constrained biomass bamboo aggregate prefabricated structure.

2. The manufacturing method of a prefabricated structure for constrained biomass bamboo aggregate as described in claim 1, characterized in that... The impregnation adhesive for the biomass bamboo aggregate (6) is one of epoxy resin, epoxy mortar, phenolic resin, polyethylene resin, or furfuryl alcohol resin.

3. The manufacturing method of a prefabricated structure for constrained biomass bamboo aggregate as described in claim 1, characterized in that... The inner hollow cross-section dimensions and shapes of the constraint tube (1) and the track tube (2) are consistent, and are one of the following: circular, rectangular, elliptical, chamfered rectangle or polygon with more than 4 sides.

4. The manufacturing method of a prefabricated structure for constrained biomass bamboo aggregate as described in claim 1, characterized in that... The constraint tube (1) and track tube (2) are made of carbon steel tube, stainless steel tube, galvanized steel tube, aluminum tube, copper tube, plastic tube, composite material tube, or bamboo tube.

5. The manufacturing method of a prefabricated structure for constrained biomass bamboo aggregate as described in claim 1, characterized in that... The wall thickness of the constraint tube (1) and the track tube (2) is 1mm to 10mm.

6. The manufacturing method of a prefabricated structure for constrained biomass bamboo aggregate as described in claim 1, characterized in that... The cross-sectional shape and size of the loading steel plate (5) are consistent with the shape and size of the internal cavity of the constraint tube (1) and the track tube (2). It is a circle, rectangle, ellipse, chamfered rectangle or a polygon with more than 4 sides, and the thickness is 5mm to 10cm.

7. The manufacturing method of a prefabricated structure for constrained biomass bamboo aggregate as described in claim 1, characterized in that... The heating medium surrounding the constraint tube (1) is one of water, steam, mineral oil, or liquid paraffin.

8. The manufacturing method of a prefabricated structure for constrained biomass bamboo aggregate as described in claim 1, characterized in that... The compacted biomass bamboo aggregate (6) has a volume compression rate of 5% to 80%.

Images