Multi-level energy-consumption high-damping concrete and preparation method thereof

Abstract

The invention relates to the technical field of building materials, in particular to multi-level energy-dissipation high-damping concrete and a preparation method thereof. According to the technical scheme, the multi-layer energy-consuming high-damping concrete can remarkably improve the damping performance and effectively absorb kinetic energy, three layers of damping structures (the C-S-H gel layer, the mortar base body layer and the concrete layer) are designed in the concrete, and through the synergistic effect of different mechanisms, the overall damping ratio of the material is remarkably increased. According to the first-level modified coarse aggregate, superfine rubber particles wrap the aggregate, shear deformation occurs during vibration, kinetic energy is absorbed, and interface friction is enhanced. According to the second-level mortar matrix, emulsified asphalt and rubber threads form an organic-inorganic interpenetrating structure, and viscous damping and interface friction force are enhanced. According to the third layer of C-S-H gel, PVA and C-S-H gel are cross-linked to form a membrane structure, and the viscoelasticity and damping performance of the gel layer are enhanced.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a multi-level energy-consuming high-damping concrete and its preparation method. Background Technology

[0002] With the continuous emergence of numerous new engineering structures, vibration problems caused by dynamic loads such as high-speed train impacts and vibrations, crowd loads, and earthquakes are becoming increasingly prominent. The vibration sources of engineering structures are complex; when the vibration frequency approaches the structure's natural frequency, the structure is in a resonant state, which seriously endangers the safety and comfort of the engineering structure. High damping is an important approach for structural vibration control, noise reduction, and seismic resistance. Researchers have proposed various forms of active, passive, and hybrid vibration control technologies. By introducing damping elements into engineering structures, their vibration response can be rapidly reduced. Active vibration control technology has drawbacks such as high requirements for control algorithms, complex configuration, and high cost, limiting its widespread application. Passive vibration control technology has good stability, does not require external energy supply, and is widely used in structural vibration reduction measures.

[0003] Concrete, as one of the most widely used materials in the construction of these infrastructures, possesses excellent plasticity and durability, and is less constrained by structural form and usage environment. Compared with energy-absorbing passive dampers, high-damping concrete can achieve similar vibration reduction levels in structural components with damping and energy-dissipating functions, while avoiding the high costs and complexities of construction or maintenance. Therefore, the development of high-damping concrete aligns with the development needs of modern concrete structures and has significant engineering application value.

[0004] However, the high elastic modulus and low damping energy dissipation capacity of ordinary concrete mean that its vibration reduction and isolation effects are generally not considered in engineering structures. In recent years, researchers have utilized the viscous damping or interfacial friction energy dissipation principles of polymers to improve the damping performance of cement-based materials by adding energy-dissipating components, such as rubber particles, polymer emulsions, fibers, graphene oxide, and exfoliated graphite. However, these energy-dissipation design methods do not fully consider the microstructural characteristics of concrete, and by only increasing the dosage of a single energy-dissipating component to improve the damping energy dissipation capacity of concrete, the improvement in concrete damping performance is limited, with a maximum increase in damping ratio of about 200%, while the strength decreases by more than 70%. Therefore, existing technical solutions offer limited improvement in the damping performance of concrete materials. Summary of the Invention

[0005] The purpose of this invention is to overcome the technical defects of existing technologies that only increase the dosage of a single energy-consuming component to improve the damping energy dissipation capacity of concrete, which will greatly reduce the strength of concrete and have a limited improvement in damping ratio. This invention provides a multi-level energy-dissipating high-damping concrete and its preparation method.

[0006] In a first aspect, the present invention provides a multi-layered energy-dissipating, high-damping concrete, comprising the following raw materials: a combination of foundation concrete and at least two energy-dissipating material units; and a damping ratio of not less than 5.5%. The foundation concrete comprises the following raw materials: ordinary Portland cement, sand, and mixing water; The energy-consuming material unit includes a first-level energy-consuming unit and a second-level energy-consuming unit; The first energy-consuming unit is modified coarse aggregate, which includes limestone crushed stone with a particle size range of 5-16 mm and the surface of the limestone crushed stone is coated with ultrafine rubber particles. The second energy-consuming unit includes emulsified asphalt and rubber filaments.

[0007] The technical solution of this invention relates to the construction of a mortar matrix layer: anionic emulsified asphalt is adsorbed onto the surface of cement particles through electrostatic interaction, thereby hindering cement hydration and accumulating at the interface between cement and sand particles and external hydration products. Unadsorbed emulsified asphalt demulsifies and forms a film as cement hydrates. The asphalt phase and low-density hydration products constitute an organic-inorganic interpenetrating structure, thus constructing a viscous damping energy-dissipating structure. When rubber fibers are added, the emulsified asphalt demulsifies and forms a film on the surface of the rubber fibers. The asphalt phase acts as a "binder," enhancing the interfacial friction between the rubber fibers and cement paste, thus constructing an interfacial friction energy-dissipating structure. Furthermore, the "bridging" effect of the rubber fibers further improves the viscous damping energy-dissipating capacity of the mortar matrix.

[0008] When concrete is subjected to external dynamic load excitation, the rubber particles adhering to and encapsulating the aggregate vibrate and absorb the kinetic energy input from the outside. The vibration of the aggregate causes the rubber coating layer to undergo shear deformation, converting the kinetic energy into potential energy. Part of the energy is dissipated through the viscous damping of the rubber coating layer, and the other part of the energy is dissipated through the friction between the rubber coating layer and the matrix interface.

[0009] Preferably, each cubic meter of the multi-layered energy-consuming high-damping concrete comprises the following parts by weight of raw materials: The foundation concrete per cubic meter comprises the following raw materials in parts by weight: 520-540 parts cement, 830-840 parts sand, and 75-85 parts mixing water; the modified coarse aggregate is 800-820 parts, the emulsified asphalt is 100-350 parts, and the rubber filament is 60-150 parts.

[0010] In the technical solution of the present invention, the cement is ordinary 42.5 silicate cement; the sand is zone II graded river sand or manufactured sand with a fineness modulus between 2.6 and 3.0.

[0011] Preferably, in the modified coarse aggregate, the ultrafine rubber particles are rubber powder with a mesh size of not less than 80.

[0012] Preferably, the emulsified asphalt is anionic emulsified asphalt with a solid content of 50% to 60%.

[0013] Preferably, the rubber filaments are produced from waste rubber tires, with a length of 1-2 cm, a diameter of 1-2 mm, and an aspect ratio of 8-15:1.

[0014] Preferably, the system further includes a third energy-consuming unit, which comprises polyvinyl alcohol (PVA) capable of forming a cross-linked PVA film structure with CSH gel in cement, wherein the PVA comprises 0.1-0.3 parts by weight.

[0015] Preferably, the polyvinyl alcohol has a degree of polymerization of 1700-1800 and a purity of ≥99.7%. The polyvinyl alcohol is added to the concrete by preparing a polyvinyl alcohol aqueous solution.

[0016] More preferably, the polyvinyl alcohol is added to the concrete by preparing a polyvinyl alcohol aqueous solution. The preparation method of the polyvinyl alcohol aqueous solution is as follows: First, PVA particles are added to deionized water, the water bath temperature is 95°C, and magnetic stirring is performed for 1 hour until the PVA is completely dissolved; Second, the transparent PVA aqueous solution is completely cooled at room temperature for 24 hours for later use.

[0017] Preferably, the mass ratio of the PVA particles to deionized water is 0.005 to 0.016.

[0018] Preferably, it further includes 0.05-0.2 parts of a viscosity modifier, wherein the viscosity modifier is a mixture of adhesive powder and cellulose ether.

[0019] Preferably, it further includes 0.01-0.05 parts of a crosslinking agent, wherein the crosslinking agent is ammonium persulfate (APS); the crosslinking agent is an analytical grade AR reagent.

[0020] Preferably, it further includes 1-2.5 parts of a water-reducing agent, wherein the water-reducing agent is a high-performance polycarboxylate water-reducing agent.

[0021] Secondly, the present invention provides a method for preparing multi-level energy-consuming high-damping concrete, comprising the following steps: S1. Weigh each raw material component according to the proportion and set aside; S2. Mix polyvinyl alcohol, emulsified asphalt, water and admixtures in proportion for 30-60 seconds, continue to add cement and mix for 30-60 seconds, continue to add rubber filaments and sand and mix for 30-60 seconds, and finally add modified coarse aggregate and mix for 60-90 seconds to obtain multi-level energy-consuming high-damping concrete mixture. S3. Pour the prepared high-damping concrete mixture into a mold, demold after curing, and obtain multi-level energy-consuming high-damping concrete after 28 days of curing.

[0022] Preferably, the additives include viscosity modifiers, crosslinking agents, and water-reducing agents.

[0023] Preferably, the modified coarse aggregate is prepared in the following manner: Step 1: Clean the coarse aggregate and then dry it. Step 2: Mix the coarse aggregate and water-based epoxy resin at a mass ratio of 15-17:1, and stir until the coarse aggregate and water-based epoxy resin are fully mixed; coat the surface of the aggregate with a uniform layer of water-based epoxy resin (i.e. the surface of the aggregate turns completely white). Step 3: Add ultrafine rubber powder to make the rubber particles adhere evenly to the surface of the coarse aggregate; Step 4: After sieving, cure for at least 24 hours to obtain a single layer of rubber particles adhering to and encapsulating the aggregate, i.e., modified coarse aggregate.

[0024] Preferably, for aggregates coated with multiple layers of rubber particles, steps 2-4 are repeated.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: In the technical solution of this invention, multi-level energy-dissipating high-damping concrete can significantly improve damping performance and effectively absorb kinetic energy. The concrete is designed with three levels of damping structure (CSH gel level, mortar matrix level, and concrete level), which work synergistically through different mechanisms to significantly enhance the overall damping ratio of the material. Under dynamic loads, it can effectively absorb and dissipate externally input kinetic energy, converting it into potential energy or dissipating it through friction and viscosity, thereby reducing structural vibration and noise.

[0026] High-damping concrete utilizes a multi-layered synergistic effect to enhance structural integrity: The first layer is modified coarse aggregate: ultrafine rubber particles coat the aggregate, causing shear deformation during vibration, absorbing kinetic energy, and enhancing interfacial friction. The second layer is the mortar matrix: emulsified asphalt and rubber filaments form an organic-inorganic interpenetrating structure, enhancing viscous damping and interfacial friction. The third layer is CSH gel: PVA and CSH gel cross-link to form a membrane structure, enhancing the viscoelasticity and damping properties of the gel layer. Attached Figure Description

[0027] Figure 1 Schematic diagram of the high-damping concrete multi-stage energy dissipation principle in Embodiment 2 of the present invention.

[0028] Figure 2 Embodiment 2 of the present invention, and photographs of the collapse spread of high-damped concrete mixtures in Comparative Examples 3-5.

[0029] Figure 3 Example 2 of the present invention shows the acceleration time history curves obtained from the test of the high-damping concrete cantilever beams of Comparative Examples 3-5. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0031] Example 1 This embodiment provides a method for preparing multi-level energy-dissipating high-damping concrete, including the following steps: S1. Weigh each raw material component according to the proportion and set aside; In this embodiment, the raw materials include the following parts by weight: Cement: 530 parts, water: 80 parts, sand: 835 parts, emulsified asphalt: 212 parts, rubber filament: 96 parts, modified coarse aggregate: 810 parts, of which the modified coarse aggregate includes two particle size ranges: 5-10mm: 324 parts, 10-16mm: 486 parts, water-reducing agent: 2.5 parts, viscosity modifier: 0.2 parts, defoamer: 4.0 parts.

[0032] S2. Mix emulsified asphalt, water, and admixtures in proportion for 30-60 seconds, then add cement and mix for 30-60 seconds, then add rubber filaments and sand and mix for 30-60 seconds, and finally add modified coarse aggregate and mix for 60-90 seconds to obtain multi-level energy-consuming high-damping concrete mixture. S3. Pour the prepared high-damping concrete mixture into a mold, demold after curing, and obtain multi-level energy-consuming high-damping concrete after 28 days of curing.

[0033] Example 2 This embodiment provides a method for preparing multi-level energy-dissipating high-damping concrete, including the following steps: S1. Weigh each raw material component according to the proportion and set aside; In this embodiment, the raw materials include the following parts by weight: Cement: 530 parts, water: 80 parts, sand: 835 parts, emulsified asphalt: 212 parts, rubber filaments: 96 parts, polyvinyl alcohol: 0.8 parts, modified coarse aggregate: 810 parts, of which the modified coarse aggregate includes two particle size ranges: 5-10mm: 324 parts, 10-16mm: 486 parts, water-reducing agent: 2.5 parts, viscosity modifier: 0.2 parts, defoamer: 4.0 parts.

[0034] S2. Mix polyvinyl alcohol, emulsified asphalt, water and admixtures in proportion for 30 seconds, then add cement and mix for 30 seconds, then add rubber filaments and sand and mix for 30 seconds, and finally add modified coarse aggregate and mix for 60 seconds to obtain multi-level energy-consuming high-damping concrete mixture. S3. Pour the prepared high-damping concrete mixture into a mold, demold after curing, and obtain multi-level energy-consuming high-damping concrete after 28 days of curing.

[0035] like Figure 1 The diagram shows the energy dissipation principle of multi-level high-damping concrete. (1) CSH gel layer: PVA forms a film structure in CSH gel. It interacts with CSH gel through hydrogen bonds. Under dynamic load, the viscoelasticity of PVA film enhances the viscous damping energy dissipation of CSH gel. (2) Mortar matrix layer: Anionic emulsified asphalt is adsorbed on the surface of cement particles through electrostatic action and accumulates in the interface area between cement and sand particles and external hydration products. The unadsorbed emulsified asphalt breaks down and forms a film as cement hydrates. The asphalt phase and low-density hydration products form an organic-inorganic interpenetrating structure, providing viscous damping energy dissipation. When rubber fibers are added, the emulsified asphalt breaks down and forms a film on the surface of the rubber fibers. The asphalt phase plays the role of "adhesive" and enhances the interfacial friction between the rubber fibers and cement stone, thus achieving interfacial friction energy dissipation; (3) Concrete layer: Under the excitation of external dynamic load, the rubber particles adhere to and wrap the aggregate and vibrate, absorbing the kinetic energy input from the outside. The vibration of the aggregate causes the rubber wrapping layer to undergo shear deformation, converting the kinetic energy into potential energy. Part of the energy is dissipated through the viscous damping of the rubber wrapping layer, and the other part of the energy is dissipated through the interfacial friction between the rubber wrapping layer and the matrix.

[0036] Example 3 This comparative example provides a method for preparing multi-level energy-dissipating, high-damping concrete, comprising the following steps: S1. Weigh each raw material component according to the proportion and set aside; In this embodiment, the raw materials include the following parts by weight: Cement: 530 parts, water: 80 parts, sand: 835 parts, emulsified asphalt: 212 parts, rubber filaments: 96 parts, polyvinyl alcohol: 1.6 parts, modified coarse aggregate: 810 parts, including two particle size ranges: 5-10mm: 324 parts, 10-16mm: 486 parts, water-reducing agent: 2.5 parts, viscosity modifier: 0.2 parts, defoamer: 4.0 parts.

[0037] S2. Mix polyvinyl alcohol, emulsified asphalt, water and admixtures in proportion for 30 seconds, then add cement and mix for 30 seconds, then add rubber filaments and sand and mix for 30 seconds, and finally add modified coarse aggregate and mix for 60 seconds to obtain multi-level energy-consuming high-damping concrete mixture. S3. Pour the prepared high-damping concrete mixture into a mold, demold after curing, and obtain multi-level energy-consuming high-damping concrete after 28 days of curing.

[0038] Comparative Example 1 This comparative example provides a method for preparing multi-level energy-dissipating, high-damping concrete, comprising the following steps: S1. Weigh each raw material component according to the proportion and set aside; This comparative example includes the following raw materials in parts by weight: Cement: 530 parts, water: 80 parts, sand: 835 parts, emulsified asphalt: 212 parts, rubber filaments: 48 parts, modified coarse aggregate: 810 parts, of which the modified coarse aggregate includes two particle size ranges: 5-10mm: 324 parts, 10-16mm: 486 parts, water-reducing agent: 2.5 parts, viscosity modifier: 0.2 parts, defoamer: 3.5 parts.

[0039] S2. Mix emulsified asphalt, water, and admixtures in proportion for 30-60 seconds, then add cement and mix for 30-60 seconds, then add rubber filaments and sand and mix for 30-60 seconds, and finally add modified coarse aggregate and mix for 60-90 seconds to obtain multi-level energy-consuming high-damping concrete mixture. S3. Pour the prepared high-damping concrete mixture into a mold, demold after curing, and obtain multi-level energy-consuming high-damping concrete after 28 days of curing.

[0040] Compared to Example 1, the rubber filaments in this comparative example were reduced by half, and the defoamer was modified to 3.5 parts.

[0041] Comparative Example 2 This comparative example provides a method for preparing multi-level energy-dissipating, high-damping concrete, comprising the following steps: S1. Weigh each raw material component according to the proportion and set aside; This comparative example includes the following raw materials in parts by weight: Cement: 530 parts, water: 133 parts, sand: 835 parts, emulsified asphalt: 106 parts, rubber filament: 48 parts, modified coarse aggregate: 810 parts, of which the modified coarse aggregate includes two particle size ranges: 5-10mm 324 parts and 10-16mm 486 parts, water-reducing agent: 2.0 parts, viscosity modifier: 0.2 parts, defoamer: 3.0 parts.

[0042] S2. Mix emulsified asphalt, water, and admixtures in proportion for 30-60 seconds, then add cement and mix for 30-60 seconds, then add rubber filaments and sand and mix for 30-60 seconds, and finally add modified coarse aggregate and mix for 60-90 seconds to obtain multi-level energy-consuming high-damping concrete mixture. S3. Pour the prepared high-damping concrete mixture into a mold, demold after curing, and obtain multi-level energy-consuming high-damping concrete after 28 days of curing.

[0043] Compared to Example 1, the rubber filaments in this comparative example were reduced by half, and the defoamer was modified to 3.5 parts.

[0044] Comparative Example 3 This comparative example provides a method for preparing multi-level energy-dissipating, high-damping concrete, comprising the following steps: S1. Weigh each raw material component according to the proportion and set aside; This comparative example includes the following raw materials in parts by weight: Cement: 530 parts, water: 186 parts, sand: 835 parts, emulsified asphalt: 0 parts, rubber filament: 0 parts, modified coarse aggregate: 810 parts, of which the modified coarse aggregate includes two particle size ranges: 5-10mm: 324 parts, 10-16mm: 486 parts, water-reducing agent: 2.0 parts, viscosity modifier: 0.05 parts, defoamer: 0 parts.

[0045] S2. Mix emulsified asphalt, water, and admixtures in proportion for 30-60 seconds, then add cement and mix for 30-60 seconds, then add rubber filaments and sand and mix for 30-60 seconds, and finally add modified coarse aggregate and mix for 60-90 seconds to obtain multi-level energy-consuming high-damping concrete mixture. S3. Pour the prepared high-damping concrete mixture into a mold, demold after curing, and obtain multi-level energy-consuming high-damping concrete after 28 days of curing.

[0046] Compared to Example 1, the number of rubber filaments in this comparative example is reduced by half.

[0047] Comparative Example 4 This comparative example provides a method for preparing multi-level energy-dissipating, high-damping concrete, comprising the following steps: S1. Weigh each raw material component according to the proportion and set aside; In this embodiment, the raw materials include the following parts by weight: Cement: 530 parts, water: 80 parts, sand: 835 parts, emulsified asphalt: 212 parts, rubber filaments: 96 parts, polyvinyl alcohol: 1.6 parts, ordinary coarse aggregate: 810 parts, water-reducing agent: 2.5 parts, viscosity modifier: 0.2 parts, defoamer: 4.0 parts. In this comparative example, the coarse aggregate was not modified.

[0048] S2. Mix polyvinyl alcohol, emulsified asphalt, water and admixtures in proportion for 30 seconds, then add cement and mix for 30 seconds, then add rubber filaments and sand and mix for 30 seconds, and finally add modified coarse aggregate and mix for 60 seconds to obtain multi-level energy-consuming high-damping concrete mixture. S3. Pour the prepared high-damping concrete mixture into a mold, demold after curing, and obtain multi-level energy-consuming high-damping concrete after 28 days of curing.

[0049] For ease of understanding and intuitive comparison, the raw material proportions of Examples 1-3 and Comparative Examples 1-4 are summarized in Table 1.

[0050] Table 1 shows the concrete mix proportions (kg / m³) for Examples 1-3 and Comparative Examples 1-4. 3 )

[0051] The high-damping concrete mixtures obtained in the four examples were cast into 100 mm × 100 mm × 100 mm cube specimens for compressive strength testing and 50 mm × 50 mm × 500 mm cantilever beam specimens for damping ratio testing. The tests were conducted according to the "Standard for Test Methods of Mechanical Properties of Ordinary Concrete" (GB / T 0081). According to the provisions of (2002), the compressive strength of the cube at 28 days was measured; the damping ratio of the high-damping concrete was obtained by cantilever beam method. The results are shown in Table 2.

[0052] Table 2 Concrete performance test results

[0053] The concrete performance test results in Table 2 show that the damping performance of the high-damping concrete based on multi-level energy dissipation of the present invention is significantly higher than that of ordinary concrete, with a damping ratio that is 5 to 10 times that of ordinary concrete, breaking through the limit of existing concrete damping ratio improvement technology; at the same time, it has good workability and mechanical properties, and can meet the load-bearing requirements of general engineering structures.

[0054] like Figure 2 The images shown are photographs of the slump spread of high-damped concrete mixture. A corresponds to Example 3, F corresponds to Example 4, G corresponds to Example 2, and D corresponds to Example 3. Figure 2 The slump spread performance of high-damped concrete mixtures with different mix proportions was demonstrated. Comparative Example 3 (A) was a standard concrete mix without any added energy-consuming components, exhibiting the largest slump (650 mm), indicating the best fluidity, but the worst damping performance (damping ratio of only 0.804%). Comparative Example 4 (F) used unmodified ordinary coarse aggregate, with a slump of 460 mm, and its fluidity was slightly lower than Examples 2 and 3, indicating that modified coarse aggregate has a certain impact on fluidity. Examples 2 (G) and 3 (D) had slumps of 470 mm and 430 mm, respectively, slightly lower than Comparative Example 3, but still exhibited good workability, and their damping ratios were significantly improved (6.089% and 10.119%, respectively), indicating that under the design of multi-level energy-consuming structures, the concrete achieved high damping performance while maintaining good workability.

[0055] like Figure 3 The figures shown are acceleration time history curves obtained from tests of high-damped concrete cantilever beams in Examples 2-3 and Comparative Examples 3-4. Figure 3The figures show the acceleration time history curves measured during the cantilever beam vibration test. Comparative Example 3 (ordinary concrete) exhibits the slowest acceleration decay, indicating the worst damping performance and weak energy dissipation capacity. Comparative Example 4 (using ordinary coarse aggregate) decays slightly faster than Comparative Example 3, suggesting that the addition of emulsified asphalt and rubber fibers improves the damping performance to some extent, but it is still far lower than Examples 2 and 3. Examples 2 and 3 show significantly faster acceleration decay, especially Example 3 (containing 1.6 parts PVA), whose vibration response weakens rapidly, indicating that it has the best damping energy dissipation capacity. This is consistent with the result in Table 2 where Example 3 has a damping ratio as high as 10.119%, verifying the significant effect of multi-level energy dissipation structures (especially the introduction of PVA film in the CSH gel layer) on improving the dynamic damping performance of concrete.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage energy-consuming, high-damping concrete, characterized in that, It includes a foundation concrete and a combination of at least two energy-dissipating material units; its damping ratio is not less than 5.5%; The foundation concrete comprises the following raw materials: ordinary Portland cement, sand, and mixing water; The energy-consuming material unit includes a first-level energy-consuming unit and a second-level energy-consuming unit; The first energy-consuming unit is modified coarse aggregate, which includes limestone crushed stone with a particle size range of 5-16 mm and the surface of the limestone crushed stone is coated with ultrafine rubber particles. The second energy-consuming unit includes emulsified asphalt and rubber filaments.

2. The multi-level energy-consuming high-damping concrete according to claim 1, characterized in that, The foundation concrete per cubic meter comprises the following raw materials in parts by weight: 520-540 parts cement, 830-840 parts sand, and 75-85 parts mixing water; the modified coarse aggregate is 800-820 parts, the emulsified asphalt is 100-350 parts, and the rubber filament is 60-150 parts.

3. The multi-level energy-consuming high-damping concrete according to claim 2, characterized in that, The modified coarse aggregate contains ultrafine rubber particles that are rubber powder with a mesh size of not less than 80.

4. The multi-level energy-consuming high-damping concrete according to claim 2, characterized in that, The emulsified asphalt is an anionic emulsified asphalt with a solid content of 50% to 60%.

5. The multi-level energy-dissipating high-damping concrete according to claim 2, characterized in that, The rubber filaments are produced from waste rubber tires, with a length of 1-2 cm, a diameter of 1-2 mm, and a length-to-diameter ratio of 8-15:

1.

6. The multi-level energy-consuming high-damping concrete according to claim 2, characterized in that, It also includes a third energy-consuming unit, which comprises polyvinyl alcohol, which can form a cross-linked PVA film structure with CSH gel in cement, wherein the polyvinyl alcohol is in the form of 1-3 parts by weight.

7. The multi-level energy-consuming high-damping concrete according to claim 6, characterized in that, The degree of polymerization of the polyvinyl alcohol is in the range of 1700-1800, and the purity is ≥99.7%; the polyvinyl alcohol is added to the concrete by preparing a polyvinyl alcohol aqueous solution.

8. The method for preparing multi-level energy-consuming high-damping concrete according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Weigh each raw material component according to the proportion and set aside; S2. Mix polyvinyl alcohol, emulsified asphalt, water and admixtures in proportion for 30-60 seconds, continue to add cement and mix for 30-60 seconds, continue to add rubber filaments and sand and mix for 30-60 seconds, and finally add modified coarse aggregate and mix for 60-90 seconds to obtain multi-level energy-consuming high-damping concrete mixture. S3. Pour the prepared high-damping concrete mixture into a mold, demold after curing, and obtain multi-level energy-consuming high-damping concrete after 28 days of curing.

9. The method for preparing multi-level energy-consuming high-damping concrete according to claim 8, characterized in that, The preparation method of polyvinyl alcohol aqueous solution is as follows: first, add PVA particles to deionized water, the water bath temperature is 95℃, and stir magnetically for 1 hour until the PVA is completely dissolved; then, cool the transparent PVA aqueous solution completely at room temperature for at least 24 hours before use.

10. The multi-level energy-consuming high-damping concrete according to claim 8, characterized in that, The modified coarse aggregate is prepared in the following manner: Step 1: Clean the coarse aggregate and then dry it. Step 2: Mix the coarse aggregate and water-based epoxy resin at a mass ratio of 15-17:1, and stir until the coarse aggregate and water-based epoxy resin are completely mixed. Step 3: Add ultrafine rubber powder to make the rubber particles adhere evenly to the surface of the coarse aggregate; Step 4: After sieving, cure for at least 24 hours to obtain a single layer of rubber particles adhering to and encapsulating the aggregate, i.e., modified coarse aggregate.

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