Composite sound barrier post and its manufacturing and connecting methods

Abstract

The application discloses a composite sound barrier stand column and a preparation method and a connecting method thereof, and belongs to the technical field of sound barriers.The composite sound barrier stand column is prepared from the following raw materials in parts by weight: a resin matrix 50-60 parts, reinforcing fibers 25-40 parts, fillers 10-15 parts, an initiator 0.8-1.2 parts, a promoter 0.1-0.3 parts, an antioxidant 0.1-0.3 parts, a dispersing agent 0.1-0.2 parts, a release agent 0.3-0.5 parts and a color paste 0.5-1 part.The composite sound barrier stand column uses the resin as the matrix, cooperates with the specific fillers and the reinforcing fibers, can take into account the strength and the toughness of the sound barrier stand column, can meet the bearing demand of the sound barrier and the impact resistance requirement, has good mechanical properties and stability, and effectively reduces the peeling and delamination problem with the lapse of time.

Description

Technical Field

[0001] This application relates to a composite material sound barrier column and its preparation and connection methods, belonging to the field of sound barrier technology. Background Technology

[0002] With the rapid development of highway transportation, vehicle speeds are increasing, leading to more prominent highway noise problems. Installing sound barriers on both sides of highways is one of the most economical and effective methods for eliminating and blocking noise. Currently, most sound barrier columns are made of H-beams and ordinary concrete. H-beams often require hot-dip galvanizing and powder coating for rust prevention, complex processes that pollute the environment, making them neither low-carbon nor environmentally friendly. Existing technologies also use UHPC (ultra-high performance concrete) columns as sound barrier columns. Chinese patent CN 119822728 A discloses a high-performance UHPC extruded sound barrier column and its preparation method. While the production cost of UHPC concrete columns remains high, almost comparable to steel columns, and the columns are 30% lighter than traditional concrete columns, they are still relatively heavy, have poor installation convenience, and high transportation costs. Composite materials, with their advantages of lightweight, easy installation, low maintenance costs, no risk of corrosion, and ability to reduce carbon emissions, have entered the public eye.

[0003] In existing technologies, composite materials used for sound barrier columns are prone to mechanical performance degradation after years of outdoor use due to vibration and temperature fluctuations, leading to their inability to withstand the load of the sound barrier and corrosion problems. Adding reinforcing fibers, such as steel fibers or glass fibers, can mitigate this issue to some extent. Chinese patent CN 119017745 A discloses a basalt fiber reinforced sound-absorbing panel for sound barriers, using a matrix resin as the sound insulation adhesive and adding basalt fibers for reinforcement; however, its impact resistance is poor.

[0004] In summary, existing sound barrier columns still have the following problems: 1. As a composite material for sound barrier columns, due to the requirements of its application scenarios, it has high requirements for toughness and impact resistance. Adding reinforcing fibers improves the strength of the composite material, but the toughness and impact resistance will decrease, making it difficult to achieve a balanced control between the two; 2. After adding reinforcing fibers, due to the problem of interfacial bonding force between the fibers and resin, delamination is prone to occur, which in turn affects its mechanical properties; 3. Composite sound barrier columns are usually installed with bolts, which are prone to corrosion over time, affecting their stability.

[0005] Therefore, there is a need for a composite material sound barrier column that can balance strength and toughness, reduce the mechanical property degradation caused by poor interfacial bonding, have good weather resistance, reduce later maintenance costs, and be easy to install, thus reducing later maintenance costs. Summary of the Invention

[0006] To address the aforementioned issues, a composite material sound barrier column and its preparation and connection methods are provided. Using resin as the matrix, combined with specific fillers and reinforcing fibers, the column balances strength and toughness, meeting both the load-bearing requirements and impact resistance requirements of the sound barrier. It exhibits excellent mechanical properties and stability, effectively reducing the problem of delamination over time.

[0007] According to one aspect of this application, a composite material sound barrier column is provided, which, by weight, comprises 50-60 parts of resin matrix, 25-40 parts of reinforcing fiber, 10-15 parts of filler, 0.8-1.2 parts of initiator, 0.1-0.3 parts of accelerator, 0.1-0.3 parts of antioxidant, 0.1-0.2 parts of dispersant, 0.3-0.5 parts of release oil, and 0.5-1 parts of color paste.

[0008] Optionally, the resin matrix comprises unsaturated polyester resin and polystyrene, wherein the mass ratio of the unsaturated polyester resin to the polystyrene is 6-8:1.

[0009] Specifically, this application uses unsaturated polyester resin and polystyrene as the resin matrix. Unsaturated polyester resin is inexpensive and readily available, which can greatly reduce the cost of composite sound barrier columns. In addition, the unsaturated polyester resin encapsulates fillers and reinforcing fibers, forming a dense matrix structure after curing, providing the column with basic corrosion resistance, formability, and mechanical load-bearing capacity. In combination with polystyrene, on the one hand, the synergistic effect of polystyrene and unsaturated polyester resin can reduce the viscosity of the resin matrix system, improve the wettability of reinforcing fibers and fillers, and reduce internal defects. On the other hand, it can also play a role in toughening and reducing shrinkage rate, thereby compensating for the brittleness of unsaturated polyester resin, improving impact resistance, and resisting external impacts such as road debris and minor collisions, preventing overall brittle failure and preventing column breakage caused by accidents such as vehicle scratches.

[0010] Specifically, the unsaturated polyester resin is type 191 unsaturated polyester resin.

[0011] Specifically, this application specifies the mass ratio of unsaturated polyester resin to polystyrene. Excessive polystyrene will result in insufficient rigidity, making the composite material difficult to withstand wind loads. Insufficient polystyrene will easily lead to brittleness and insufficient toughness in the composite material. Under the specified ratio in this application, the crosslinking strength and structural stability of the unsaturated polyester resin can be guaranteed, while the toughening, viscosity reduction, and shrinkage compensation effects of polystyrene can be fully utilized, which can fully meet the performance requirements of the sound barrier column.

[0012] Optionally, the filler includes talc powder and aminosilane-modified low-melting-point glass powder, wherein the mass ratio of talc powder to aminosilane-modified low-melting-point glass powder is 1~2:1.

[0013] Specifically, this application uses talc as a filler, which can improve the rigidity and dimensional stability of the matrix; the addition of aminosilane-modified low-melting-point glass powder can, on the one hand, work together with talc to improve the rigidity of the matrix, and on the other hand, aminosilane-modified low-melting-point glass powder can effectively strengthen the interfacial bonding between fiber and resin and filler and resin, reducing the occurrence of delamination.

[0014] Optionally, the preparation steps of the aminosilane-modified low-melting-point glass powder specifically include: S1. Disperse the low melting point glass powder in an organic solvent using ultrasonication, and then dry to remove the organic solvent; S2. Dissolve the aminosilane coupling agent in an organic solvent, add it to the low melting point glass powder obtained in S1, soak it, filter it, and then vacuum dry it. S3. After curing the low-melting-point glass powder obtained in S2 under ultraviolet light, the desired aminosilane-modified low-melting-point glass powder is obtained.

[0015] Specifically, the aminosilane coupling agent selected is 3-aminopropyltrimethoxysilane coupling agent, which is prepared into a 2% volume fraction solution in ethanol solution.

[0016] Optionally, the reinforcing fiber includes basalt fiber, glass fiber and polypropylene fiber, wherein the mass ratio of basalt fiber to glass fiber is (1~2):1, and the mass of polypropylene fiber is 1 / 7 to 1 / 5 of the sum of the masses of basalt fiber and glass fiber.

[0017] Specifically, this application uses basalt fiber, glass fiber and polypropylene fiber in combination. Basalt fiber and glass fiber together ensure the load-bearing capacity and deformation resistance of the column, while polypropylene fiber is interspersed among them to play a role in flexibility and toughening. When the material is impacted, the polypropylene fiber can undergo plastic deformation to absorb energy, avoiding the defect of rigid materials being easy to break and achieving a balance between strength and toughness.

[0018] Optionally, the polypropylene fiber is a polypropylene fiber modified with maleic anhydride grafting.

[0019] Specifically, the polypropylene fiber is modified with maleic anhydride grafting, which can further improve the interfacial bonding between the fiber and the resin matrix, reduce delamination, and improve weather resistance.

[0020] Optionally, the initiator is tert-butyl peroxide; the accelerator is cobalt isooctanoate; the antioxidant is antioxidant 1010; and the dispersant is PEG-4000.

[0021] According to another aspect of this application, a method for preparing the above-mentioned composite material sound barrier column is also provided, comprising the following steps: (1) Resin matrix premix: Heat unsaturated polyester resin to 60~70℃, add polystyrene powder while stirring, and stir until completely dissolved to obtain resin matrix premix liquid; (2) Additive premixing: Add accelerator, antioxidant, release oil and color paste to resin matrix premix liquid, cool to 30~40℃ and add initiator, stir at low speed to obtain resin-additive premix liquid; add dispersant to talc powder, stir so that dispersant coats the surface of talc powder to obtain pretreated talc powder. (3) Mixing: Add the resin-additive premix to a high-speed mixer and stir at low speed. Add the pretreated talc powder and stir at high speed until it is evenly dispersed. Then add aminosilane-modified low-melting-point glass powder and continue to stir evenly. Then add basalt fiber, glass fiber and polypropylene fiber in sequence and stir at low speed until they are evenly distributed. Then perform vacuum degassing to obtain the mixture. (4) The mixture is poured into the mold cavity, molded and cured to obtain a composite material sound barrier column blank; (5) The composite material sound barrier column blank is subjected to constant temperature baking post-treatment to obtain the composite material sound barrier column.

[0022] Specifically, the curing process is a stepped temperature curing process, which includes a temperature of 60~70℃ and a pressure of 5~6MPa for 5~7 minutes; a temperature of 80~90℃ and a pressure of 10~12MPa for 10~12 minutes; and a temperature of 90~100℃ and a pressure of 14~17MPa for 13~16 minutes.

[0023] Optionally, in step (2), the speed of low-speed stirring is 300~500 r / min and the stirring time is 10~15 min; in step (3), the speed of low-speed stirring is 200~300 r / min and the speed of high-speed stirring is 1200~1500 r / min; in step (5), the constant temperature baking temperature is 120~130℃ and the baking time is 2~3 h.

[0024] Specifically, constant temperature baking can further improve the degree of cross-linking and ensure dimensional stability.

[0025] According to another aspect of this application, a method for connecting the aforementioned composite material sound barrier column is also provided, comprising inserting bolts through the lower part of the composite material sound barrier column, then pouring a concrete base, and providing reinforcing ribs on both sides of the composite material sound barrier column, wherein the reinforcing ribs connect the composite material sound barrier column and the concrete base.

[0026] This application utilizes a post-casting method, where bolts are inserted through the lower part of the composite material sound barrier column and then cast into the concrete base. This ensures safety, stability, and resistance to corrosion, significantly reducing the cost of later maintenance. Reinforcing ribs are installed on both sides of the composite material sound barrier column to connect it to the concrete base, further strengthening the fixation and making the composite material sound barrier column more robust.

[0027] The beneficial effects of this application include, but are not limited to: 1. The composite material sound barrier column according to this application uses resin as the matrix, combined with specific fillers and reinforcing fibers, which can take into account both the strength and toughness of the sound barrier column, so that it can meet both the load-bearing requirements of the sound barrier and the impact resistance requirements, and has good mechanical properties and stability, effectively reducing the problem of delamination over time.

[0028] 2. The composite material sound barrier column of this application is made of basalt fiber, glass fiber and polypropylene fiber. The basalt fiber and glass fiber together ensure the load-bearing capacity and deformation resistance of the column, while the polypropylene fiber is interspersed among them to play a role in flexibility and toughening. When the material is impacted, the polypropylene fiber can undergo plastic deformation to absorb energy, avoiding the defect of rigid materials being easy to break and achieving a balance between strength and toughness.

[0029] 3. The composite material sound barrier column of this application uses aminosilane-modified low-melting-point glass powder and talc powder as fillers, which can fill the gaps between the resin matrix and fibers to the greatest extent, reduce the porosity of the composite material, increase the density, and improve the mechanical properties; aminosilane-modified low-melting-point glass powder can also improve the interfacial bonding force and reduce delamination.

[0030] 4. According to the preparation method of the composite material sound barrier column of this application, compression molding and temperature stepped temperature curing are adopted to effectively reduce shrinkage and porosity; further addition of baking steps improves dimensional stability, and the preparation method is simple and easy to promote. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic cross-sectional view of the fixed installation of composite material sound barrier columns according to an embodiment of this application.

[0032] List of components and reference numerals: 1. Composite material sound barrier column; 2. Concrete base; 3. Reinforcing ribs; 4. Bolts. Detailed Implementation

[0033] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of skill in the art. All reagents and raw materials used in this invention are readily available through conventional means, and unless otherwise specified, they shall be used in accordance with conventional methods or product instructions. Furthermore, any methods and materials similar to or equivalent to those described herein may be applied to the methods of this invention. The basalt fibers, glass fibers, and polypropylene fibers used in the examples and comparative examples are chopped to 3-6 mm in size; the preferred embodiments and materials described in this patent are for illustrative purposes only.

[0035] Example 1 Preparation of aminosilane-modified low-melting-point glass powder 1) Pretreatment of low melting point glass powder: Bismuth borosilicate series low melting point glass powder is used, with a particle size controlled at 5~10μm; it is ultrasonically dispersed in acetone for 20min to remove surface impurities, and then dried at 120°C for 8h to remove acetone. 2) Preparation of aminosilane coupling agent: 3-aminopropyltrimethoxysilane coupling agent was selected and prepared into a 2% volume fraction solution in ethanol solution; 3) Coating with silane coupling agent: Soak the pretreated glass powder in the coupling agent ethanol solution for 5 hours, remove and filter, vacuum dry at 110℃ for 8 hours, and then adhere the coupling agent. 4) Ultraviolet curing reaction: The glass powder coated with coupling agent is irradiated in an ultraviolet irradiation chamber for 30 minutes to cause the coupling agent to undergo a cross-linking reaction and be cured on the surface of the glass powder to obtain the aminosilane modified low melting point glass powder.

[0036] Experiment Example 2 A composite material sound barrier column, by weight, comprises the following raw materials: 60 parts of resin matrix (53 parts of unsaturated polyester resin type 191 and 7 parts of polystyrene). 40 parts of reinforcing fiber (17 parts basalt fiber, 17 parts glass fiber and 6 parts polypropylene fiber) 15 parts filler (10 parts talc powder, 5 parts aminosilane modified low melting point glass powder) Initiator tert-butyl peroxide 1.2 parts, Accelerator: Cobalt isooctanoate 0.3 parts Antioxidant 1010 0.3 parts Dispersant PEG-4000 0.2 parts 0.5 parts release oil 1 part colorant.

[0037] The steps for preparing composite material sound barrier columns using the above raw materials are as follows: (1) Resin matrix premix: Heat unsaturated polyester resin to 60°C, add polystyrene powder while stirring, and stir until completely dissolved to obtain resin matrix premix liquid; (2) Additive premixing: Add accelerator, antioxidant, release oil and color paste to resin matrix premix liquid, cool to 30℃ and add initiator, stir at low speed, the stirring speed is 300r / min and the stirring time is 10min; obtain resin-additive premix liquid; add dispersant to talc powder, stir so that the dispersant coats the surface of talc powder, and obtain pretreated talc powder; (3) Mixing: Add the resin-additive premix to a high-speed mixer and stir at low speed. Add the pretreated talc powder and stir at high speed until it is evenly dispersed. Then add aminosilane-modified low-melting-point glass powder and continue stirring until it is evenly dispersed. Then add basalt fiber, glass fiber and polypropylene fiber in sequence and stir at low speed until it is evenly distributed. Then perform vacuum degassing. The speed of low-speed stirring is 200 r / min and the speed of high-speed stirring is 1200 r / min to obtain the mixture. (4) The mixture is laid into the mold cavity, molded and cured by compression molding. The curing is a stepped temperature curing process, specifically including a temperature of 60℃ and a pressure of 5MPa for 5 minutes; a temperature of 80℃ and a pressure of 10MPa for 10 minutes; and a temperature of 90℃ and a pressure of 14MPa for 13 minutes, to obtain a composite material sound barrier column blank. (5) The composite material sound barrier column blank is subjected to constant temperature baking post-treatment. The constant temperature baking temperature is 120℃ and the baking time is 2h to obtain the composite material sound barrier column.

[0038] Experimental Example 3 A composite material sound barrier column, by weight, comprises the following raw materials: 50 parts resin matrix (43 parts unsaturated polyester resin type 191, 7 parts polystyrene) 25 parts reinforcing fiber (14 parts basalt fiber, 7 parts glass fiber and 4 parts polypropylene fiber) 10 parts filler (5 parts talc powder, 5 parts aminosilane modified low melting point glass powder) Initiator tert-butyl peroxide 0.8 parts, Accelerator: Cobalt isooctanoate 0.1 parts Antioxidant 1010 0.1 parts 0.1 parts of dispersant PEG-4000 0.3 parts release oil 0.5 parts colorant.

[0039] The steps for preparing composite material sound barrier columns using the above raw materials are as follows: (1) Resin matrix premix: Heat unsaturated polyester resin to 70°C, add polystyrene powder while stirring, and stir until completely dissolved to obtain resin matrix premix liquid; (2) Additive premixing: Add accelerator, antioxidant, release oil and color paste to resin matrix premix liquid, cool to 40℃ and add initiator, stir at low speed, the stirring speed is 500r / min and the stirring time is 15min; obtain resin-additive premix liquid; add dispersant to talc powder, stir so that the dispersant coats the surface of talc powder, and obtain pretreated talc powder; (3) Mixing: Add the resin-additive premix to a high-speed mixer and stir at low speed. Add the pretreated talc powder and stir at high speed until it is evenly dispersed. Then add aminosilane-modified low-melting-point glass powder and continue stirring until it is evenly dispersed. Then add basalt fiber, glass fiber and polypropylene fiber in sequence and stir at low speed until it is evenly distributed. Then perform vacuum degassing. The speed of low-speed stirring is 300 r / min and the speed of high-speed stirring is 1500 r / min to obtain the mixture. (4) The mixture is laid into the mold cavity, molded and cured. The curing is a stepped temperature curing process, specifically including a temperature of 70℃ and a pressure of 6MPa for 7 minutes; a temperature of 90℃ and a pressure of 12MPa for 12 minutes; and a temperature of 100℃ and a pressure of 17MPa for 16 minutes, to obtain a composite material sound barrier column blank. (5) The composite material sound barrier column blank is subjected to constant temperature baking post-treatment. The constant temperature baking temperature is 130℃ and the baking time is 3h to obtain the composite material sound barrier column.

[0040] Experiment Example 4 A composite material sound barrier column, by weight, comprises the following raw materials: 55 parts resin matrix (48 parts unsaturated polyester resin type 191, 7 parts polystyrene) 35 parts of reinforcing fiber (20 parts of basalt fiber, 10 parts of glass fiber and 5 parts of polypropylene fiber). 15 parts filler (7.5 parts talc powder, 7.5 parts aminosilane-modified low-melting-point glass powder) Initiator tert-butyl peroxide 1 part, Accelerator: Cobalt isooctanoate 0.2 parts Antioxidant 1010 0.2 parts Dispersant PEG-4000 0.15 parts 0.4 parts release oil 0.6 parts colorant.

[0041] The steps for preparing composite material sound barrier columns using the above raw materials are as follows: (1) Resin matrix premix: Heat unsaturated polyester resin to 65°C, add polystyrene powder while stirring, and stir until completely dissolved to obtain resin matrix premix liquid; (2) Additive premixing: Add accelerator, antioxidant, release oil and color paste to resin matrix premix liquid, cool to 30℃ and add initiator, stir at low speed. The stirring speed in step (2) is 400r / min and the stirring time is 10min; resin-additive premix liquid is obtained; add dispersant to talc powder and stir so that the dispersant coats the surface of talc powder to obtain pretreated talc powder; (3) Mixing: Add the resin-additive premix to a high-speed mixer and stir at low speed. Add the pretreated talc powder and stir at high speed until it is evenly dispersed. Then add aminosilane-modified low-melting-point glass powder and continue stirring until it is evenly dispersed. Then add basalt fiber, glass fiber and polypropylene fiber in sequence and stir at low speed until it is evenly distributed. Then perform vacuum degassing. The speed of low-speed stirring is 200 r / min and the speed of high-speed stirring is 1300 r / min to obtain the mixture. (4) The mixture is laid into the mold cavity, molded and cured by compression molding. The curing is a stepped temperature curing process, specifically including a temperature of 65℃ and a pressure of 6MPa for 5 minutes; a temperature of 85℃ and a pressure of 12MPa for 10 minutes; and a temperature of 95℃ and a pressure of 15MPa for 15 minutes, to obtain a composite material sound barrier column blank. (5) The composite material sound barrier column blank is subjected to constant temperature baking post-treatment. The constant temperature baking temperature is 125℃ and the baking time is 3h to obtain the composite material sound barrier column.

[0042] Example 5 The difference between Example 5 and Example 4 is that the polypropylene fiber is a polypropylene fiber modified by maleic anhydride grafting, and the rest are the same.

[0043] Example 6 The difference between Example 6 and Example 4 is that the resin matrix includes 55 parts of unsaturated polyester resin type 191, but does not include polystyrene; all other aspects are the same.

[0044] Example 7 The difference between Example 7 and Example 4 is that the filler includes 15 parts of talc powder but does not include aminosilane-modified low-melting-point glass powder, while the rest are the same.

[0045] Example 8 The difference between Example 8 and Example 4 is that bismuth borosilicate series low melting point glass powder without aminosilane modification is used; otherwise, they are the same.

[0046] Example 9 The difference between Example 9 and Example 4 is that the preparation steps of aminosilane modified low melting point glass powder do not include the ultraviolet curing step, while the rest are the same.

[0047] Example 10 The difference between Example 10 and Example 4 is that the reinforcing fibers include 12 parts basalt fiber, 12 parts glass fiber and 11 parts polypropylene fiber, while the rest are the same.

[0048] Example 11 The difference between Example 11 and Example 4 is that the constant temperature baking step is not included, but the rest are the same.

[0049] Comparative Example 1 The difference between Comparative Example 1 and Example 4 is that Comparative Example 1 does not include reinforcing fibers, but all other aspects are the same.

[0050] Comparative Example 2 The difference between Comparative Example 2 and Example 4 is that the latter does not include filler, while the rest are the same.

[0051] Experimental Example 1 The mechanical properties of the composite material sound barrier columns obtained in Examples 2-11 and Comparative Examples 1-2 were tested, and the test results are as follows: Table 1 Mechanical performance test results

[0052] Experiment Example 2 The hygrothermal aging resistance of the composite material sound barrier columns obtained in Examples 2-11 and Comparative Examples 1-2 was tested. The sample from Experimental Example 1 was aged at 80°C and 95% relative humidity for 1000 hours. The retention rate of each mechanical property after aging was tested, and the test results are as follows: Table 2 Results of Damp Heat Aging Resistance Test

[0053] As can be seen from the above, the composite sound barrier columns prepared in Examples 2-5 have good mechanical properties and resistance to damp heat aging. Among them, Example 5 is the best example, and the maleic anhydride grafted modified polypropylene fiber can play a role in strengthening the interface and toughening. The impact resistance of Example 6 decreased significantly, and the lack of polystyrene increased the brittleness of the matrix and weakened the interface. Example 7 selected a single filler and lacked aminosilane modified low melting point glass powder, resulting in a significant decrease in interfacial bonding force. In Comparative Examples 1 and 2, the lack of reinforcing fibers and fillers resulted in a significant decrease in all mechanical properties.

[0054] like Figure 1As shown, bolts 4 are inserted through the lower part of the composite material sound barrier column 1, and then concrete base 2 is poured. Reinforcing ribs 3 are set on both sides of the composite material sound barrier column 1, and the reinforcing ribs 3 connect the composite material sound barrier column 1 and the concrete base 2.

[0055] This application uses a post-casting method to insert bolts 4 through the lower part of the composite material sound barrier column 1. After the bolts 4 are cast into the concrete base 2, they are safe, stable, and not easy to rust, which greatly reduces the cost of later maintenance. Reinforcing ribs 3 are set on both sides of the composite material sound barrier column 1 to connect the composite material sound barrier column 1 and the concrete base 2, which further strengthens the fixation and makes the composite material sound barrier column 1 more solid. Moreover, it is easy to install, lightweight, and easy to promote and use.

[0056] The above description is merely an embodiment of this application, and the scope of protection of this application is not limited to these specific embodiments, but is determined by the claims of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the technical concept and principles of this application should be included within the scope of protection of this application.

Claims

1. A composite material sound barrier column, characterized in that, By weight, its raw material composition includes 50-60 parts resin matrix, 25-40 parts reinforcing fiber, 10-15 parts filler, 0.8-1.2 parts initiator, 0.1-0.3 parts accelerator, 0.1-0.3 parts antioxidant, 0.1-0.2 parts dispersant, 0.3-0.5 parts release oil and 0.5-1 parts color paste.

2. The composite material sound barrier column according to claim 1, characterized in that, The resin matrix comprises unsaturated polyester resin and polystyrene, wherein the mass ratio of unsaturated polyester resin to polystyrene is 6~8:

1.

3. The composite material sound barrier column according to claim 1, characterized in that, The filler includes talc powder and aminosilane-modified low-melting-point glass powder, and the mass ratio of talc powder to aminosilane-modified low-melting-point glass powder is 1~2:

1.

4. The composite material sound barrier column according to claim 3, characterized in that, The preparation steps of the aminosilane-modified low-melting-point glass powder specifically include: S1. Disperse the low melting point glass powder in an organic solvent using ultrasonication, and then dry to remove the organic solvent; S2. Dissolve the aminosilane coupling agent in an organic solvent, add it to the low melting point glass powder obtained in S1, soak it, filter it, and then vacuum dry it. S3. After curing the low-melting-point glass powder obtained in S2 under ultraviolet light, the desired aminosilane-modified low-melting-point glass powder is obtained.

5. The composite material sound barrier column according to claim 1, characterized in that, The reinforcing fibers include basalt fibers, glass fibers, and polypropylene fibers. The mass ratio of basalt fibers to glass fibers is (1~2):1, and the mass of the polypropylene fibers is 1 / 7 to 1 / 5 of the sum of the masses of basalt fibers and glass fibers.

6. The composite material sound barrier column according to claim 5, characterized in that, The polypropylene fiber is a polypropylene fiber modified by maleic anhydride grafting.

7. The composite material sound barrier column according to claim 1, characterized in that, The initiator is tert-butyl peroxide; the accelerator is cobalt isooctanoate; the antioxidant is antioxidant 1010; and the dispersant is PEG-4000.

8. The method for preparing the composite material sound barrier column according to any one of claims 1 to 7, characterized in that, Includes the following steps: (1) Resin matrix premix: Heat unsaturated polyester resin to 60~70℃, add polystyrene powder while stirring, and stir until completely dissolved to obtain resin matrix premix liquid; (2) Additive premixing: Add accelerator, antioxidant, release oil and color paste to resin matrix premix liquid, cool to 30~40℃ and add initiator, stir at low speed to obtain resin-additive premix liquid; add dispersant to talc powder, stir so that dispersant coats the surface of talc powder to obtain pretreated talc powder. (3) Mixing: Add the resin-additive premix to a high-speed mixer and stir at low speed. Add the pretreated talc powder and stir at high speed until it is evenly dispersed. Then add aminosilane-modified low-melting-point glass powder and continue to stir evenly. Then add basalt fiber, glass fiber and polypropylene fiber in sequence and stir at low speed until they are evenly distributed. Then perform vacuum degassing to obtain the mixture. (4) The mixture is poured into the mold cavity, molded and cured to obtain a composite material sound barrier column blank; (5) The composite material sound barrier column blank is subjected to constant temperature baking post-treatment to obtain the composite material sound barrier column.

9. The method for preparing the composite material sound barrier column according to claim 8, characterized in that, In step (2), the stirring speed is 300~500 r / min and the stirring time is 10~15 min; in step (3), the stirring speed is 200~300 r / min and the stirring speed is 1200~1500 r / min; in step (5), the constant temperature baking temperature is 120~130℃ and the baking time is 2~3 h.

10. A method for connecting composite material sound barrier columns, characterized in that, The method involves inserting bolts through the lower part of the composite material sound barrier column, then pouring a concrete base, and setting reinforcing ribs on both sides of the composite material sound barrier column, the reinforcing ribs connecting the composite material sound barrier column and the concrete base.

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