Fabricated bamboo concrete solid beam and production method thereof
By using foam concrete insulation shell, bamboo mesh layer and aerated concrete inner core in the beam structure, combined with longitudinal stressed ribs and bamboo rib stirrups, the high carbon emission and high energy consumption problems of reinforced concrete beams are solved, and the low carbon emission and insulation effects of low-carbon buildings are achieved.
Patent Information
- Application Number
- CN202510799187.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-16
- Publication Date
- 2025-08-15
AI Technical Summary
Existing reinforced concrete beams have problems with high carbon emissions and high energy consumption during production and operation, especially in the lack of insulation products on stressed components such as beams.
The structural design from the outside to the inside is adopted, including foam concrete insulation shell layer, bamboo mesh layer, concrete stress layer and aerated concrete inner core. Combined with longitudinal stressed ribs and bamboo rib stirrups, some bamboo materials are used to replace steel bars, low-carbon materials are used and structural design is optimized to improve thermal insulation performance.
It has achieved low-carbon emission production process and low-energy consumption thermal insulation effects during operation, and promoted the development of low-carbon buildings.
Smart Images
Figure CN120486656A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of low-carbon buildings, and in particular to an assembled bamboo concrete solid beam and a production method thereof. Background Art
[0002] For a long time, reinforced concrete has been the primary material in the construction industry. While this structure offers high strength and stability, it also carries the problem of high carbon emissions. First, its production consumes a large amount of energy, generating significant amounts of carbon dioxide emissions. Second, its high thermal conductivity results in high energy consumption for heating and cooling during operation. To reduce carbon emissions, it is necessary to develop building materials that use less cement and less steel, and offer thermal insulation. While a wide range of insulating wall materials have been developed, few insulating products are available for load-bearing components like beams.
[0003] Research has shown that bamboo offers high strength, ease of processing, and significantly lower thermal conductivity than steel, while also eliminating carbon emissions. Other studies have shown that foamed concrete uses less cement, has a low density, offers excellent thermal insulation, and is easy to pour and construct. Aerated concrete and foamed concrete also emit even lower carbon emissions and are easily prefabricated. Therefore, the potential exists for the combined use of bamboo, aerated concrete, and foamed concrete to produce low-carbon, environmentally friendly, insulated beams. Summary of the Invention
[0004] The purpose of the present invention is to provide an assembled bamboo concrete solid beam and a production method thereof, which has the dual advantages of low carbon emissions during the production period and thermal insulation during the operation period, thereby promoting the development of low-carbon buildings.
[0005] To achieve the above-mentioned objectives, the present invention provides an assembled bamboo concrete solid beam, which comprises, from the outside to the inside, a foam concrete insulation outer shell layer, a bamboo mesh layer, a concrete stress-bearing layer, and an aerated concrete inner core. The concrete stress-bearing layer includes longitudinal stress-bearing bars, bamboo stirrups, and filling concrete cast outside the longitudinal stress-bearing bars and stirrups.
[0006] Preferably, the thickness of the foam concrete insulation shell is 40-100 mm and the density is 1000-1500 kg / m 3 , strength is not less than 5MPa, and thermal conductivity is not greater than 0.35W / (m·K).
[0007] Preferably, the bamboo strips mesh layer is formed by cross-weaving horizontal and vertical bamboo strips, the width of the bamboo strips is 5-10 mm, the thickness is 1-3 mm, and the weaving gap size of the horizontal and vertical bamboo strips is not greater than 0.3 mm×0.3 mm.
[0008] Preferably, the longitudinal stress-bearing reinforcement includes longitudinal stress-bearing steel bars and longitudinal stress-bearing bamboo bars, the longitudinal stress-bearing steel bars are arranged at the four corners inside the bamboo reinforcement stirrups, the longitudinal stress-bearing bamboo bars are arranged inside the bamboo reinforcement stirrups, and the longitudinal stress-bearing steel bars and the longitudinal stress-bearing bamboo bars are tied and connected with the bamboo reinforcement stirrups;
[0009] The longitudinal stress-bearing steel bars shall be threaded steel bars with a diameter greater than 16mm. The cross-section of the longitudinal stress-bearing bamboo bars shall be a rectangle with a length of 40-80mm and a width of 20-44mm. The horizontal net spacing between the longitudinal stress-bearing steel bars and the longitudinal stress-bearing bamboo bars, and the horizontal net spacing between the longitudinal stress-bearing bamboo bars shall not be less than 40mm.
[0010] Preferably, the periphery of the longitudinally stressed bamboo reinforcement is provided with a first bamboo fiber yarn wound in a clockwise spiral, the diameter of the first bamboo fiber yarn is 2-5 mm, the angle between the first bamboo fiber yarn and the longitudinal axis of the bamboo reinforcement cross section is 13°-18°, the pitch of the first bamboo fiber yarn is 10-20 mm, and the surface of the first bamboo fiber yarn is brushed with epoxy resin.
[0011] Preferably, the filling concrete includes concrete and bamboo fiber, the strength of the concrete is not less than 30 MPa, and the volume fraction of the bamboo fiber is 0.5%-1% of the concrete.
[0012] Preferably, the bamboo fiber has a diameter of 100-300 μm, a length of 30-45 mm, a tensile strength of 1.3-1.6 GPa, an elastic modulus of 69-72 GPa, and a density of 1.33-1.4 g / cm 3 .
[0013] Preferably, two rows of grooves are provided on the inner and outer sides of the bamboo stirrups along the length direction, the grooves are filled with second bamboo fiber yarn, quartz sand and epoxy resin, and protrusions formed by the second bamboo fiber yarn, quartz sand and epoxy resin are provided on the grooves, and the second bamboo fiber yarn is spirally wound clockwise along the length direction of the bamboo stirrups;
[0014] The cross-sectional length of the bamboo stirrups is 20-24mm, the cross-sectional width is 10-12mm, and the bamboo stirrups are arranged along the longitudinal direction of the force-bearing reinforcement with a spacing of 80-200mm. The thickness of the concrete filling on the outer side of the bamboo stirrups is not less than 20mm;
[0015] The angle between the groove direction and the length direction of the bamboo stirrup is 42°-48°, the groove spacing is 12-15mm, the depth is 2-3mm, and the width is 4-6mm;
[0016] The second bamboo fiber yarn has a diameter of 2-5 mm and a pitch of 10-20 mm;
[0017] The height of the protrusion is 1-1.5mm.
[0018] Preferably, the aerated concrete core is elliptical, the ratio of its major axis to its minor axis is equal to the aspect ratio of the concrete stress layer, the distance between its four vertices and the bamboo stirrups is not less than 50 mm, and its density is 400-600 kg / m 3 , strength not less than 1MPa, thermal conductivity not greater than 0.15W / (m·K);
[0019] A perforation is provided in the aerated concrete inner core, the center of the perforation is located at the midpoint of the radius of the long axis of the aerated concrete inner core, the hole wall of the perforation is a PVC tube, and the diameter of the perforation is 15-25 mm.
[0020] The present invention provides a method for producing an assembled bamboo concrete solid beam, comprising the following steps:
[0021] S1. Prepare the aerated concrete core and cure it to the designed strength for later use;
[0022] S2. Cutting bamboo bars according to the length of the longitudinal stress-bearing bamboo bars and bamboo stirrups to obtain prefabricated longitudinal stress-bearing bamboo bars and prefabricated bamboo stirrups, and cutting steel bars according to the length of the longitudinal stress-bearing steel bars to obtain longitudinal stress-bearing steel bars;
[0023] S3, coating the first bamboo fiber yarn with epoxy resin and then winding the yarn clockwise around the prefabricated longitudinal stress-bearing bamboo reinforcement to obtain the longitudinal stress-bearing bamboo reinforcement;
[0024] S4, setting a groove on the surface of the prefabricated bamboo reinforcement stirrup along the length direction thereof, embedding the second bamboo fiber yarn into the groove and winding it clockwise, and then filling the groove with quartz sand and epoxy resin to form a protrusion to obtain a bamboo reinforcement stirrup;
[0025] S5, soaking the bamboo strips in an antiseptic solution, drying and weaving the strips into a bamboo mesh layer;
[0026] S6. Support the bottom formwork, set up the bamboo strips mesh layer on the bottom formwork, then arrange the longitudinal stress-bearing steel bars, longitudinal stress-bearing bamboo bars, and bamboo bar stirrups and tie them together to form a skeleton, and stand up the bamboo strips on the left and right sides of the bamboo strips mesh layer and fix them on the skeleton;
[0027] S7, supporting the edge membrane, pass the two steel strands through the two holes of the aerated concrete core respectively, and then place the aerated concrete core into the frame;
[0028] S8, support the side formwork, tension the steel strands, and fix the position of the aerated concrete core;
[0029] S9, steaming the bamboo slices in a boiling water bath for 1 hour and microwave heating for 15 minutes to remove moisture, then removing lignin and hemicellulose using 88% formic acid and 30% hydrogen peroxide, and soaking the bamboo slices in a 2.0 g / L polydopamine solution to optimize surface properties, and then spraying them with epoxy resin to enhance waterproofness to obtain bamboo fiber, mixing the bamboo fiber with concrete to prepare filling concrete, and simultaneously mixing foam with concrete to prepare foam concrete;
[0030] S10. Pour filling concrete into the bamboo mesh layer and pour foam concrete outside the bamboo mesh layer. Curing for 2-3 days, remove the bottom formwork, side formwork and side formwork, and continue curing for 28 days. The foam concrete insulation outer shell layer and the concrete load-bearing layer both reach the design strength, and an assembled bamboo concrete solid beam is obtained.
[0031] Therefore, the present invention adopts the above-mentioned assembled bamboo concrete solid beam and its production method, which has the following beneficial effects:
[0032] (1) Using bamboo to partially replace steel bars is not only easier to process, but also reduces the weight of solid beams, reduces carbon emissions during the production process, and promotes the development of low-carbon buildings;
[0033] (2) Adding bamboo fiber and foam into concrete can reduce the thermal conductivity of concrete, play a role in thermal insulation, and reduce energy consumption during the operation period.
[0034] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 This is a cross-sectional view of a first embodiment of an assembled bamboo concrete solid beam and a production method thereof according to the present invention;
[0036] Figure 2 It is a schematic diagram of bamboo stirrups in Example 1 of an assembled bamboo concrete solid beam and a production method thereof of the present invention.
[0037] Reference numerals
[0038] 1. Foam concrete insulation outer shell; 2. Bamboo mesh layer; 3. Concrete stress layer; 4. Aerated concrete inner core; 5. Longitudinal stress reinforcement; 6. Bamboo stirrups; 7. Filling concrete; 8. Longitudinal stress reinforcement; 9. Longitudinal stress bamboo reinforcement; 10. Perforation; 11. Grooving; 12. Second bamboo fiber spinning line. DETAILED DESCRIPTION
[0039] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.
[0040] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0041] The first bamboo fiber yarn and the second bamboo fiber yarn are both bamboo fiber yarns with a specification of 40s produced by Qingdao Zhengxinlong Textile Technology Co., Ltd.
[0042] Example 1
[0043] like Figure 1 As shown, the present invention provides an assembled bamboo concrete solid beam, which comprises, from the outside to the inside, a foamed concrete insulation outer layer 1, a bamboo strip mesh layer 2, a concrete load-bearing layer 3, and an aerated concrete inner core 4. The foamed concrete insulation outer layer 1 provides excellent thermal insulation, helping to reduce energy loss in the building. The bamboo strip mesh layer 2 enhances the overall strength and toughness of the structure. The use of renewable bamboo is environmentally friendly and economical. The concrete load-bearing layer 3, as the primary load-bearing component, ensures the stability and load-bearing capacity of the solid beam structure. The aerated concrete inner core 4 reduces the overall weight while maintaining excellent thermal and sound insulation properties.
[0044] The thickness of the foam concrete insulation shell 1 is 40mm and the density is 1200kg / m 3 , strength is 8MPa, thermal conductivity is 0.25W / (m·K), it is made of foam and concrete, which reduces the thermal conductivity of concrete and has good thermal insulation effect.
[0045] The bamboo strips net layer 2 is formed by cross-weaving bamboo strips in horizontal and vertical directions, with a width of 7 mm and a thickness of 3 mm. The weaving gap size of the bamboo strips in horizontal and vertical directions is 0.2 mm×0.2 mm. The bamboo strips need to be treated with antiseptic treatment in advance, i.e., soaked in borax solution and then dried.
[0046] The concrete bearing layer 3 includes longitudinal reinforcement bars 5, bamboo stirrups 6, and infill concrete 7 poured outside the longitudinal reinforcement bars 5 and stirrups. The combination of longitudinal reinforcement bars 5 and bamboo stirrups 6 enhances the beam's bending resistance and overall stability, while the infill concrete 7 poured outside further strengthens the structure.
[0047] The longitudinal stress-bearing reinforcement 5 includes longitudinal stress-bearing steel bars 8 and longitudinal stress-bearing bamboo bars 9. The longitudinal stress-bearing steel bars 8 are arranged at the four corners inside the bamboo stirrups 6, and the longitudinal stress-bearing bamboo bars 9 are arranged inside the bamboo stirrups 6. The longitudinal stress-bearing steel bars 8 provide high-strength tensile performance, while the longitudinal stress-bearing bamboo bars 9 have good toughness. Both are tied and connected with the bamboo stirrups 6, thereby enhancing the stability and bearing capacity of the overall structure.
[0048] The longitudinal stress-bearing steel bars 8 are threaded steel bars with a diameter of 18 mm. The cross-section of the longitudinal stress-bearing bamboo bars 9 is a rectangle with a length of 40 mm and a width of 20 mm. The horizontal net spacing between the longitudinal stress-bearing steel bars 8 and the longitudinal stress-bearing bamboo bars 9, and the horizontal net spacing between the longitudinal stress-bearing bamboo bars 9 are both 50 mm.
[0049] A first bamboo fiber yarn is wound clockwise around the longitudinally stressed bamboo reinforcement 9. The first bamboo fiber yarn is wound at a 15° angle to the longitudinal axis of the reinforcement cross-section, and the pitch is 13 mm. This optimizes stress distribution and enhances shear resistance. The first bamboo fiber yarn has a diameter of 3 mm and is coated with epoxy resin, which improves its durability and corrosion resistance while also enhancing its bond with concrete.
[0050] like Figure 2 As shown, the bamboo stirrups 6 have a cross-sectional length of 24 mm and a width of 10 mm. They are spaced 100 mm apart along the longitudinal direction of the load-bearing bars 5. The top of the bamboo stirrups 6 is filled with 22 mm thick concrete 7, enhancing the top's compressive strength and overall stability. The bottom and left and right sides are not filled with concrete 7, but instead feature a foam concrete outer shell 1 for thermal insulation. Two rows of grooves 11 are formed along the inside and outside of the bamboo stirrups 6 along their length, at a 45° angle to the length of the stirrups 6. This optimizes stress distribution and improves shear resistance. The grooves 11 are spaced 13 mm apart, 2 mm deep, and 4 mm wide. They are filled with a second bamboo fiber yarn 12, quartz sand, and epoxy resin. A 1 mm high protrusion formed from the second bamboo fiber yarn 12, quartz sand, and epoxy resin is placed on the grooves 11, increasing the contact area with the concrete 7 and providing additional strength, wear resistance, and durability. The second bamboo fiber yarn 12 is spirally wound clockwise along the length direction of the bamboo reinforcement stirrup 6. The diameter of the second bamboo fiber yarn 12 is 4 mm, and the pitch thereof is 13 mm.
[0051] The filling concrete 7 includes concrete and bamboo fiber. The concrete strength is 40 MPa, and the volume fraction of bamboo fiber is 1% of the concrete. The bamboo fiber has a diameter of 200 μm, a length of 30 mm, a tensile strength of 1.5 GPa, an elastic modulus of 71 GPa, and a density of 1.36 g / cm 3 . Bamboo fiber needs to be pretreated to enhance its spatial dispersion and interfacial bonding performance with concrete. The specific steps include: cutting the purchased 4-5 year old bamboo with a breast diameter of more than 100mm into bamboo strips with a length of 340mm, a width of 15mm, and a thickness of 8mm. The bamboo strips are placed in a boiling water bath and steamed for 1 hour to soften them. The softened bamboo strips are microwaved for 15 minutes to remove moisture, improve the dispersion of the bamboo fiber, and prepare for subsequent chemical treatment. The physically treated bamboo fiber is soaked in a mixed solution of 30% hydrogen peroxide and 88% formic acid to remove lignin and hemicellulose. The bamboo fiber is then soaked in a 2.0g / L polydopamine solution and dried in a hot air circulation kiln to improve the interfacial bonding performance. Finally, it is soaked in epoxy resin and dried to enhance weather resistance and service life.
[0052] The aerated concrete core 4 is elliptical, with the ratio of its major axis to its minor axis equal to the aspect ratio of the concrete stress layer 3. The distance between its four vertices and the bamboo stirrups 6 is 60 mm, and its density is 450 kg / m 3 , strength is 2.3MPa, thermal conductivity is 0.12W / (m·K).
[0053] A through hole 10 is provided in the aerated concrete inner core 4. The center of the through hole 10 is located at the midpoint of the long axis radius of the aerated concrete inner core 4. The hole wall of the through hole 10 is a PVC tube. The diameter of the through hole 10 is 20 mm. The through hole 10 can be used to fix the position of the inner core during production and can be used for lifting during installation. It also plays a role in heat insulation and reduces the thermal conductivity of the solid beam.
[0054] The present invention provides a method for producing an assembled bamboo concrete solid beam, comprising the following steps:
[0055] S1, prepare aerated concrete core 4, and cure it to the designed strength for standby use;
[0056] S2, according to the length of the longitudinal stress-bearing bamboo reinforcement 9, the bamboo reinforcement stirrup 6, the bamboo reinforcement is cut to obtain the prefabricated longitudinal stress-bearing bamboo reinforcement 9, the prefabricated bamboo reinforcement stirrup 6, and according to the length of the longitudinal stress-bearing steel bar 8, the steel bar is cut to obtain the longitudinal stress-bearing steel bar 8;
[0057] S3, coating the first bamboo fiber yarn with epoxy resin and then winding the yarn clockwise around the prefabricated longitudinal stress-bearing bamboo reinforcement 9 to obtain the longitudinal stress-bearing bamboo reinforcement 9;
[0058] S4, along the length direction of the prefabricated bamboo reinforcement stirrup 6 on its surface is provided with a groove 11, the second bamboo fiber yarn 12 is embedded in the groove 11 and wound clockwise, and then the groove 11 is filled with quartz sand and epoxy resin to form a protrusion to obtain the bamboo reinforcement stirrup 6;
[0059] S5, soaking the bamboo strips in an antiseptic solution, drying and weaving them into a bamboo strip mesh layer 2;
[0060] S6, support the bottom formwork, set up the bamboo mesh layer 2 on the bottom formwork, then arrange the longitudinal stress-bearing steel bars 8, the longitudinal stress-bearing bamboo bars 9, the bamboo stirrups 6 and tie them to form a skeleton, and stand the bamboo strips on the left and right sides of the bamboo mesh layer 2 upright and fix them on the skeleton;
[0061] S7, supporting the edge membrane, respectively pass the two steel strands through the two through-holes 10 of the aerated concrete core 4, and then place the aerated concrete core 4 into the frame;
[0062] S8, supporting the side formwork, tensioning the steel strands, and fixing the position of the aerated concrete core 4;
[0063] S9, steaming the bamboo slices in a boiling water bath for 1 hour and microwave heating for 15 minutes to remove moisture, then using 88% formic acid and 30% hydrogen peroxide to remove lignin and hemicellulose, and then soaking the bamboo slices in a 2.0 g / L polydopamine solution to optimize surface properties, and then spraying epoxy resin to enhance waterproofness to obtain bamboo fiber, mixing the bamboo fiber with concrete to prepare filling concrete 7, and simultaneously mixing foam with concrete to prepare foam concrete;
[0064] S10, pouring filling concrete 7 into the bamboo strip mesh layer 2, pouring foam concrete outside the bamboo strip mesh layer 2, curing for 3 days, removing the bottom form, side form and side form, and continuing to cure for 28 days, the foam concrete insulation outer shell layer 1 and the concrete load-bearing layer 3 both reach the design strength, and an assembled bamboo concrete solid beam is obtained.
[0065] Therefore, the present invention adopts the above-mentioned assembled bamboo concrete solid beam and its production method, which has the dual advantages of low carbon emissions during the production period and thermal insulation during the operation period, and promotes the development of low-carbon buildings.
[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.
Claims
1. An assembled bamboo concrete solid beam, characterized in that: From the outside to the inside, the concrete solid beam includes a foam concrete insulation outer layer, a bamboo mesh layer, a concrete stress-bearing layer, and an aerated concrete inner core. The concrete stress-bearing layer includes longitudinal stress-bearing bars, bamboo stirrups, and filling concrete cast outside the longitudinal stress-bearing bars and stirrups.
2. The assembled bamboo concrete solid beam according to claim 1, characterized in that: The thickness of the foam concrete insulation shell is 40-100mm and the density is 1000-1500kg / m 3 , strength is not less than 5MPa, and thermal conductivity is not greater than 0.35W / (m·K).
3. The assembled bamboo concrete solid beam according to claim 1, characterized in that: The bamboo strips mesh layer is formed by cross-weaving horizontal and vertical bamboo strips. The width of the bamboo strips is 5-10mm, the thickness is 1-3mm, and the weaving gap size of the horizontal and vertical bamboo strips is not greater than 0.3mm×0.3mm.
4. The assembled bamboo concrete solid beam according to claim 1, characterized in that: The longitudinal stress reinforcement includes longitudinal stress steel bars and longitudinal stress bamboo bars. The longitudinal stress steel bars are arranged at the four corners inside the bamboo stirrups, and the longitudinal stress bamboo bars are arranged inside the bamboo stirrups. The longitudinal stress steel bars and longitudinal stress bamboo bars are tied and connected with the bamboo stirrups. The longitudinal stress-bearing steel bars shall be threaded steel bars with a diameter greater than 16mm. The cross-section of the longitudinal stress-bearing bamboo bars shall be a rectangle with a length of 40-80mm and a width of 20-44mm. The horizontal net spacing between the longitudinal stress-bearing steel bars and the longitudinal stress-bearing bamboo bars, and the horizontal net spacing between the longitudinal stress-bearing bamboo bars shall not be less than 40mm.
5. The assembled bamboo concrete solid beam according to claim 4, characterized in that: A first bamboo fiber yarn is provided on the periphery of the longitudinal stress-bearing bamboo reinforcement in a clockwise spiral. The diameter of the first bamboo fiber yarn is 2-5 mm, the angle between the first bamboo fiber yarn and the longitudinal axis of the bamboo reinforcement cross section is 13°-18°, the pitch of the first bamboo fiber yarn is 10-20 mm, and the surface of the first bamboo fiber yarn is brushed with epoxy resin.
6. The assembled bamboo concrete solid beam according to claim 1, characterized in that: The filling concrete comprises concrete and bamboo fiber. The strength of the concrete is not less than 30 MPa, and the volume fraction of the bamboo fiber is 0.5%-1% of the concrete.
7. The assembled bamboo concrete solid beam according to claim 1, characterized in that: Two rows of grooves are provided on both sides of the bamboo reinforcement stirrup along the length direction, the grooves are filled with second bamboo fiber yarn, quartz sand and epoxy resin, and protrusions formed by the second bamboo fiber yarn, quartz sand and epoxy resin are provided on the grooves, and the second bamboo fiber yarn is spirally wound clockwise along the length direction of the bamboo reinforcement stirrup; The cross-sectional length of the bamboo stirrups is 20-24mm, the cross-sectional width is 10-12mm, and the bamboo stirrups are arranged along the longitudinal direction of the force-bearing reinforcement with a spacing of 80-200mm. The thickness of the concrete filling on the outer side of the bamboo stirrups is not less than 20mm; The angle between the groove direction and the length direction of the bamboo stirrup is 42°-48°, the groove spacing is 12-15mm, the depth is 2-3mm, and the width is 4-6mm; The second bamboo fiber yarn has a diameter of 2-5 mm and a pitch of 10-20 mm; The height of the protrusion is 1-1.5mm.
8. The assembled bamboo concrete solid beam according to claim 1, characterized in that: The inner core of aerated concrete is elliptical, with the ratio of its major axis to minor axis equal to the height-width ratio of the concrete stress layer. The distance between its four vertices and the bamboo stirrups is not less than 50mm, and its density is 400-600kg / m 3 , strength not less than 1MPa, thermal conductivity not greater than 0.15W / (m·K); A perforation is provided in the aerated concrete inner core, the center of the perforation is located at the midpoint of the radius of the long axis of the aerated concrete inner core, the hole wall of the perforation is a PVC tube, and the diameter of the perforation is 15-25 mm.
9. The method for producing an assembled bamboo concrete solid beam according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Prepare the aerated concrete core and cure it to the designed strength for later use; S2. Cutting bamboo bars according to the length of the longitudinal stress-bearing bamboo bars and bamboo stirrups to obtain prefabricated longitudinal stress-bearing bamboo bars and prefabricated bamboo stirrups, and cutting steel bars according to the length of the longitudinal stress-bearing steel bars to obtain longitudinal stress-bearing steel bars; S3, coating the first bamboo fiber yarn with epoxy resin and then winding the yarn clockwise around the prefabricated longitudinal stress-bearing bamboo reinforcement to obtain the longitudinal stress-bearing bamboo reinforcement; S4, setting a groove on the surface of the prefabricated bamboo reinforcement stirrup along the length direction thereof, embedding the second bamboo fiber yarn into the groove and winding it clockwise, and then filling the groove with quartz sand and epoxy resin to form a protrusion to obtain a bamboo reinforcement stirrup; S5, soaking the bamboo strips in an antiseptic solution, drying and weaving the strips into a bamboo mesh layer; S6. Support the bottom formwork, set up the bamboo strips mesh layer on the bottom formwork, then arrange the longitudinal stress-bearing steel bars, longitudinal stress-bearing bamboo bars, and bamboo bar stirrups and tie them together to form a skeleton, and stand up the bamboo strips on the left and right sides of the bamboo strips mesh layer and fix them on the skeleton; S7, support the side formwork, pass the two steel strands through the two through-holes of the aerated concrete core respectively, and then place the aerated concrete core into the frame; S8, support the side formwork, tension the steel strands, and fix the position of the aerated concrete core; S9, steaming the bamboo slices in a boiling water bath for 1 hour and microwave heating for 15 minutes to remove moisture, then removing lignin and hemicellulose using 88% formic acid and 30% hydrogen peroxide, and soaking the bamboo slices in a 2.0 g / L polydopamine solution to optimize surface properties, and then spraying them with epoxy resin to enhance waterproofness to obtain bamboo fiber, mixing the bamboo fiber with concrete to prepare filling concrete, and simultaneously mixing foam with concrete to prepare foam concrete; S10. Pour filling concrete into the bamboo mesh layer and pour foam concrete outside the bamboo mesh layer. Curing for 2-3 days, remove the bottom formwork, side formwork and side formwork, and continue curing for 28 days. The foam concrete insulation outer shell layer and the concrete load-bearing layer both reach the design strength, and an assembled bamboo concrete solid beam is obtained.