Basalt fiber composite rubber reinforced concrete and a preparation method thereof

Abstract

The application belongs to the technical field of concrete and specifically relates to a basalt fiber composite rubber reinforced concrete and a preparation method thereof. The basalt fiber composite rubber reinforced concrete comprises the following raw materials in parts by weight: 35-45 parts of aluminate cement, 45-65 parts of coarse aggregate, 30-60 parts of fine aggregate, 8-15 parts of fly ash, 5-10 parts of modified basalt fiber, 2-6 parts of waste tire rubber particles, 0.1-0.5 parts of water reducing agent and 8-15 parts of water; the structural formula of the water reducing agent is: The basalt fiber composite rubber reinforced concrete prepared by the application has excellent mechanical properties and crack resistance.

Description

Technical Field

[0001] This invention belongs to the field of concrete technology, specifically relating to a basalt fiber composite rubber reinforced concrete and its preparation method. Background Technology

[0002] With the continuous growth of global car ownership, the disposal of waste tires has become a global problem. Statistics show that more than 1 billion waste tires are generated globally each year, a significant portion of which end up in landfills or stockpiles, consuming vast amounts of land resources and posing fire hazards and environmental pollution risks. To promote resource recycling, researchers are exploring the possibility of crushing waste tires into particles for use in concrete. This approach not only disposes of a large quantity of waste tires but also imparts new performance characteristics to the concrete.

[0003] However, due to significant differences between rubber granules and natural aggregates, as well as between rubber powder and cementitious materials, rubber concrete differs considerably from ordinary concrete in terms of workability, mechanical properties, and durability. Waste tire granules have a low modulus of elasticity, making them prone to debonding from the matrix under stress, creating stress concentration points and reducing the compressive and flexural strength of the concrete. Simultaneously, the highly hydrophobic surface of waste tire granules introduces more porosity into concrete, increasing the risk of bleeding and consequently affecting the early strength and crack resistance of the concrete. These issues urgently require solutions through optimization of the concrete formulation. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the primary objective of this invention is to provide a basalt fiber composite rubber reinforced concrete. By adding the water-reducing agent and modified basalt fiber prepared in this invention to concrete containing waste tire rubber particles, the mechanical properties and crack resistance of the concrete are improved.

[0005] Another objective of this invention is to provide a method for preparing the above-mentioned basalt fiber composite rubber reinforced concrete.

[0006] The objective of this invention is achieved through the following technical solution: A basalt fiber composite rubber reinforced concrete comprises the following raw materials in parts by weight: 35-45 parts aluminate cement, 45-65 parts coarse aggregate, 30-60 parts fine aggregate, 8-15 parts fly ash, 5-10 parts modified basalt fiber, 2-6 parts waste tire rubber granules, 0.1-0.5 parts water-reducing agent, and 8-15 parts water. The structural formula of the water-reducing agent is as follows: .

[0007] Based on the above-mentioned basalt fiber composite rubber reinforced concrete, the preparation process of the water-reducing agent is further as follows: (1) Add formaldehyde solution and dimethylamine solution to the aqueous solution of sodium lignosulfonate, react under heating conditions, cool the reaction solution to room temperature and adjust the pH to 3.0-3.2 after the reaction is completed, centrifuge, collect the product, and dry to obtain intermediate 1; The structure of intermediate 1 is as follows: (2) Add intermediate 1 and bromopropane to a mixed solvent of acetone / water and reflux the reaction. After the reaction is complete, filter and collect the solid product, and recrystallize it with ethanol to obtain the water-reducing agent.

[0008] According to the above-mentioned basalt fiber composite rubber reinforced concrete, further, in step (1), the concentration of sodium lignosulfonate in the aqueous solution is (0.05-0.06) g / mL; the ratio of sodium lignosulfonate, dimethylamine solution, and formaldehyde solution is 1 g: (6-7) mL: (2-3) mL; the concentration of dimethylamine solution is 35-40 wt%; and the concentration of formaldehyde solution is 37 wt%.

[0009] According to the above-mentioned basalt fiber composite rubber reinforced concrete, further, the heating temperature in step (1) is 50-60℃ and the reaction time is 3-6 h.

[0010] According to the above-mentioned basalt fiber composite rubber reinforced concrete, further, in step (2), the ratio of intermediate 1, bromopropane and acetone-water mixed solvent is 1 g: (5.5-6.7) g: (20-25) mL; the volume ratio of acetone to water in the mixed solvent is 7:3; the reflux reaction time is 50-55 h.

[0011] Based on the above-mentioned basalt fiber composite rubber reinforced concrete, the preparation process of the modified basalt fiber is further as follows: (a) The pretreated basalt fibers were added to a toluene solution of 3-aminopropyltriethoxysilane and refluxed at 100-120°C. The mixture was then filtered, washed, and dried to obtain aminated basalt fibers. (b) The aminated basalt fiber is added to N,N-dimethylformamide, and then butyl succinic anhydride is added. The mixture is stirred and reacted, then filtered, washed and dried to obtain modified basalt fiber.

[0012] According to the above-mentioned basalt fiber composite rubber reinforced concrete, further, in step (a), the ratio of the toluene solution of 3-aminopropyltriethoxysilane to the pretreated basalt fiber is (25-40) mL: 1 g; the mass fraction of 3-aminopropyltriethoxysilane in the toluene solution of 3-aminopropyltriethoxysilane is 10-20%.

[0013] According to the above-mentioned basalt fiber composite rubber reinforced concrete, further, in step (b), the ratio of aminated basalt fiber, N,N-dimethylformamide, and butyl succinic anhydride is 1 g: (25-30) mL: (3.5-5) g; the temperature of the stirring reaction is 50-65℃, and the time is 12-24 h.

[0014] Based on the above-mentioned basalt fiber composite rubber reinforced concrete, further, the preparation process of the pretreated basalt fiber in step (a) is as follows: add basalt fiber to hydrochloric acid solution, stir at 45-50℃ for 1-2 h, filter, wash and dry to obtain the product.

[0015] According to the above-mentioned basalt fiber composite rubber reinforced concrete, the ratio of basalt fiber to HCl solution is 1 g: (25-40) mL; the concentration of HCl solution is 1-2 mol / L.

[0016] According to the above-mentioned basalt fiber composite rubber reinforced concrete, the fine aggregate is natural river sand with a particle size of 1-2 mm; the coarse aggregate is primary crushed stone with a particle size of 5-20 mm; the fly ash is Class I fly ash; the waste tire rubber particles have a particle size of 4-12 mm; and the basalt fiber has a linear density of 300-500 tex and a diameter of 6-8 μm.

[0017] The above-mentioned method for preparing basalt fiber composite rubber reinforced concrete involves mixing aluminate cement, coarse aggregate, fine aggregate, fly ash, modified basalt fiber, and waste tire rubber particles evenly according to the stated weight proportions to obtain a mixture; water and water-reducing agent are then added to the mixture and mixed evenly.

[0018] The present invention has the following advantages over the prior art: 1. This invention provides a basalt fiber composite rubber-reinforced concrete, comprising aluminate cement, waste tire rubber granules, water-reducing agents, and other raw materials. This invention chemically modifies sodium lignosulfonate through the Mannich reaction and quaternization modification, introducing quaternary ammonium cations while retaining its original active hydroxyl and sulfonate groups, thereby preparing a quaternized sodium lignosulfonate water-reducing agent. This water-reducing agent significantly improves concrete performance through a dual mechanism: on the one hand, the quaternary ammonium cations and sulfonate groups in the molecule are adsorbed onto the surface of cement particles through electrostatic interactions, effectively dispersing the flocculated structure of cement particles, improving dispersibility, and reducing the water-cement ratio; on the other hand, the retained hydroxyl and methoxy groups can form hydrogen bonds with water molecules, binding a large number of water molecules in polymer clusters, forming a hydrogel protective film on the surface of concrete particles, significantly improving bleeding, thereby improving the early strength and durability of the concrete.

[0019] 2. This invention also incorporates modified basalt fibers into concrete. The basalt fibers are amination with APTES and then reacted with butyl succinic anhydride, simultaneously introducing alkyl chains and carboxylic acid groups onto their surface. On one hand, the carboxylic acid groups can chemically bond with cement hydration products, forming a strong interfacial bonding layer. This chemical bonding not only enhances the interfacial bond strength between the fiber and the concrete matrix but also improves stress transfer efficiency, allowing the basalt fibers to more effectively exert their reinforcing effect. On the other hand, the presence of alkyl chains further enhances the flexibility of the basalt fibers, enabling them to better adapt to stress changes in concrete and effectively prevent the propagation of microcracks, thereby improving the crack resistance of the concrete. Simultaneously, the alkyl chains can also reduce the interaction forces between fibers, improving their dispersibility in concrete. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the synthesis process of the water-reducing agent in Examples 1-3 of the present invention; Figure 2 The FT-IR chromatograms of the water-reducing agent and sodium lignosulfonate in Example 1 of this invention are shown below. Figure 3 This is a SEM image of the modified basalt fiber prepared in Example 4 of this invention. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the following embodiments are only for illustrating the present invention and should not be regarded as limiting the present invention. Specific conditions not specified in the embodiments are performed according to conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, the reagents or instruments used are all conventional products obtained through commercial channels.

[0022] In the following preparation examples, embodiments, or comparative examples of this invention, the fine aggregate is natural river sand with a particle size of 1-2 mm; the coarse aggregate is primary crushed stone with a particle size of 5-20 mm; the fly ash is Class I fly ash; the waste tire rubber particles have a particle size of 4-12 mm; the linear density of the basalt fiber is 300-500 tex, and the diameter of the basalt fiber is 6-8 μm.

[0023] (a) Preparation example Preparation Example 1 A water-reducing agent, the preparation process of which is as follows: Figure 1 As shown, the specific steps are as follows: (1) According to the ratio of sodium lignosulfonate, dimethylamine solution and formaldehyde solution of 1 g: 6.5 mL: 2.5 mL, 37 wt% formaldehyde solution and 35 wt% dimethylamine solution were added to the aqueous solution of 0.05 g / mL sodium lignosulfonate and reacted at 55℃ for 4 h. The reaction solution was cooled to room temperature, and the pH of the reaction solution was adjusted to 3.1 with 0.5 mol / L hydrochloric acid solution to precipitate the product. After centrifugation, the product was dried in a vacuum oven at 60℃ for 24 h to obtain intermediate 1. (2) According to the ratio of intermediate 1, bromopropane and acetone-water mixed solvent of 1 g: 6 g: 22 mL, intermediate 1 and bromopropane were added to acetone-water (v / v=7:3) mixed solvent and refluxed for 52 h. After the reaction was completed, the solid product was obtained by filtration and recrystallized with ethanol to obtain water-reducing agent.

[0024] The FT-IR spectra of the obtained water-reducing agent and the raw material sodium lignosulfonate are shown below. Figure 2 As shown, Figure 2 Curve a corresponds to sodium lignosulfonate, and curve b corresponds to the water-reducing agent of this invention. From Figure 2 As can be seen from this, compared to sodium lignosulfonate, the water-reducing agent has a lower viscosity at 950 cm⁻¹. -1 CN appears at [location] + The characteristic peaks indicate the successful synthesis of the water-reducing agent.

[0025] Preparation Example 2 A water-reducing agent, the preparation process of which is as follows: Figure 1 As shown, the specific steps are as follows: (1) According to the ratio of sodium lignosulfonate, dimethylamine solution and formaldehyde solution of 1 g: 6 mL: 2 mL, 37 wt% formaldehyde solution and 35 wt% dimethylamine solution were added to an aqueous solution of sodium lignosulfonate with a concentration of 0.06 g / mL, and the reaction was carried out at 50℃ for 6 h. The reaction solution was cooled to room temperature, and the pH of the reaction solution was adjusted to 3.0 with 0.5 mol / L hydrochloric acid solution to precipitate the product. After centrifugation, the product was dried in a vacuum oven at 60℃ for 24 h to obtain intermediate 1. (2) According to the ratio of intermediate 1, bromopropane and acetone-water mixed solvent of 1 g: 5.5 g: 20 mL, intermediate 1 and bromopropane were added to acetone-water (v / v=7:3) mixed solvent and refluxed for 50 h. After the reaction was completed, the solid product was obtained by filtration and recrystallized with ethanol to obtain water-reducing agent.

[0026] Preparation Example 3 A water-reducing agent, the preparation process of which is as follows: Figure 1 As shown, the specific steps are as follows: (1) According to the ratio of sodium lignosulfonate, dimethylamine solution and formaldehyde solution of 1 g: 7 mL: 3 mL, 37 wt% formaldehyde solution and 40 wt% dimethylamine solution were added to an aqueous solution of sodium lignosulfonate with a concentration of 0.06 g / mL, and the reaction was carried out at 60℃ for 3 h. The reaction solution was cooled to room temperature, and the pH of the reaction solution was adjusted to 3.2 with 0.5 mol / L hydrochloric acid solution to precipitate the product. After centrifugation, the product was dried in a vacuum oven at 60℃ for 24 h to obtain intermediate 1. (2) According to the ratio of intermediate 1, bromopropane and acetone-water mixed solvent 1 g: 6.7 g: 25 mL, intermediate 1 and bromopropane were added to acetone-water (v / v=7:3) mixed solvent and refluxed for 55 h. After the reaction was completed, the solid product was obtained by filtration and recrystallized with ethanol to obtain water-reducing agent.

[0027] Preparation Example 4 A modified basalt fiber, the preparation process of which is as follows: (a) Basalt fiber was added to a 1.5 mol / L HCl solution at a ratio of 1 g to 30 mL, stirred at 45 °C for 2 h, filtered, washed with deionized water, and dried under vacuum to obtain pretreated basalt fiber; then, pretreated basalt fiber was added to a toluene solution containing 15 wt% APTES at a ratio of 30 mL to 1 g, refluxed at 110 °C overnight, filtered, washed with toluene, and dried under vacuum to obtain aminated basalt fiber; (b) Following a ratio of 1 g: 25 mL: 4 g for aminated basalt fiber, N,N-dimethylformamide (DMF), and butyl succinic anhydride, the aminated basalt fiber was added to DMF and sonicated for 30 min. Then, butyl succinic anhydride was added, and the mixture was stirred at 60 °C for 18 h. After filtration, the solid was washed with DMF and anhydrous ethanol, and vacuum dried to obtain modified basalt fiber. The SEM image of the obtained modified basalt fiber is shown below. Figure 3 As shown.

[0028] Preparation Example 5 A modified basalt fiber, the preparation process of which is as follows: (a) Basalt fiber was added to a 2 mol / L HCl solution at a ratio of 1 g to 25 mL, stirred at 50 °C for 1 h, filtered, washed with deionized water, and dried under vacuum to obtain pretreated basalt fiber; then, pretreated basalt fiber was added to a toluene solution containing 20 wt% APTES at a ratio of 25 mL to 1 g, refluxed at 100 °C overnight, filtered, washed with toluene, and dried under vacuum to obtain aminated basalt fiber; (b) The amino-modified basalt fiber, DMF and butyl succinic anhydride were added to DMF in a ratio of 1 g: 30 mL: 3.5 g and ultrasonically treated for 30 min. Then butyl succinic anhydride was added and the mixture was stirred at 50 °C for 24 h. The mixture was filtered, and the solid was washed with DMF and anhydrous ethanol. After vacuum drying, the modified basalt fiber was obtained.

[0029] Preparation Example 6 A modified basalt fiber, the preparation process of which is as follows: (a) Basalt fiber was added to a 1 mol / L HCl solution at a ratio of 1 g to 40 mL, stirred at 45 °C for 2 h, filtered, washed with deionized water, and dried under vacuum to obtain pretreated basalt fiber; then, pretreated basalt fiber was added to a toluene solution containing 10 wt% APTES at a ratio of 40 mL to 1 g, refluxed at 120 °C overnight, filtered, washed with toluene, and dried under vacuum to obtain aminated basalt fiber; (b) The amino-modified basalt fiber was added to DMF and ultrasonically treated for 30 min, and then butyl succinic anhydride was added. The mixture was stirred at 65 °C for 12 h, filtered, and the solid was washed with DMF and anhydrous ethanol. After vacuum drying, the modified basalt fiber was obtained.

[0030] (II) Implementation Examples Example 1 A basalt fiber composite rubber reinforced concrete comprises the following raw materials by weight: 40 parts aluminate cement, 55 parts coarse aggregate, 45 parts fine aggregate, 10 parts fly ash, 8 parts modified basalt fiber of Preparation Example 4, 4 parts waste tire rubber granules, 0.3 parts water-reducing agent of Preparation Example 1, and 12 parts water.

[0031] This embodiment also provides a method for preparing the above-mentioned basalt fiber composite rubber reinforced concrete, the steps of which are as follows: According to the above-mentioned weight proportions, aluminate cement, coarse aggregate, fine aggregate, fly ash, modified basalt fiber, and waste tire rubber granules are mixed evenly to obtain a mixture; water and water-reducing agent are added to the above mixture and mixed evenly.

[0032] Example 2 A basalt fiber composite rubber reinforced concrete comprises the following raw materials by weight: 35 parts aluminate cement, 45 parts coarse aggregate, 30 parts fine aggregate, 8 parts fly ash, 5 parts modified basalt fiber of Preparation Example 5, 2 parts waste tire rubber granules, 0.1 parts water-reducing agent of Preparation Example 2, and 8 parts water.

[0033] The preparation method of the above-mentioned basalt fiber composite rubber reinforced concrete is the same as that in Example 1.

[0034] Example 3 A basalt fiber composite rubber reinforced concrete comprises the following raw materials by weight: 45 parts aluminate cement, 65 parts coarse aggregate, 60 parts fine aggregate, 15 parts fly ash, 10 parts modified basalt fiber of Preparation Example 6, 6 parts waste tire rubber granules, 0.5 parts water-reducing agent of Preparation Example 3, and 15 parts water.

[0035] The preparation method of the above-mentioned basalt fiber composite rubber reinforced concrete is the same as that in Example 1.

[0036] (III) Comparative Example Comparative Example 1 Comparative Example 1 is basically the same as Example 1, except that the water-reducing agent in Example 1 is replaced with sodium lignosulfonate.

[0037] Comparative Example 2 Comparative Example 2 is basically the same as Example 1, except that the modified basalt fiber in Example 1 is replaced with basalt fiber.

[0038] (iv) Test Cases The concretes prepared in Examples 1-3 and Comparative Examples 1-2 were cured under standard conditions for a certain period of time and then subjected to performance tests. The 7-day compressive strength (MPa), 28-day compressive strength (MPa), and 28-day splitting tensile strength were tested in accordance with GB / T50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete". The experimental results are shown in Table 1. Table 1 As can be seen from Table 1, compared with Comparative Examples 1-2, Examples 1-3 of the present invention significantly improved the mechanical properties and crack resistance of concrete by adding sodium quaternized lignin sulfonate as a water-reducing agent and adding modified basalt fiber.

[0039] In Comparative Example 1, replacing the quaternized sodium lignosulfonate water-reducing agent of the present invention with sodium lignosulfonate resulted in a decrease in both compressive strength and splitting tensile strength, with a significant reduction in compressive strength. This may be because the present invention chemically modifies sodium lignosulfonate through the Mannich reaction and quaternization modification, introducing quaternary ammonium cations while retaining its original active hydroxyl and sulfonate groups, thereby preparing the quaternized sodium lignosulfonate water-reducing agent. This water-reducing agent significantly improves concrete performance through a dual-action mechanism: on the one hand, the quaternary ammonium cations and sulfonate groups in the molecule are adsorbed onto the surface of cement particles through electrostatic interactions, effectively dispersing the flocculated structure of cement particles, improving dispersibility, and reducing the water-cement ratio; on the other hand, the retained hydroxyl and methoxy groups can form hydrogen bonds with water molecules, binding a large number of water molecules within polymer clusters, forming a hydrogel protective film on the surface of concrete particles, significantly improving bleeding, and thus improving the early strength and durability of concrete.

[0040] In Comparative Example 2, replacing the modified basalt fiber with unmodified basalt fiber resulted in a decrease in both compressive strength and splitting tensile strength. This is likely because the basalt fiber, after amination with APTES and subsequent reaction with butyl succinic anhydride, simultaneously introduces alkyl chains and carboxylic acid groups onto its surface. On one hand, the carboxylic acid groups can chemically bond with cement hydration products, forming a strong interfacial bond layer. This chemical bonding not only enhances the interfacial bond strength between the fiber and the concrete matrix but also improves stress transfer efficiency, allowing the basalt fiber to more effectively exert its reinforcing effect. On the other hand, the presence of alkyl chains further enhances the flexibility of the basalt fiber, enabling it to better adapt to stress changes in concrete and effectively prevent the propagation of microcracks, thereby improving the crack resistance of the concrete. Simultaneously, the alkyl chains can also reduce the interaction forces between fibers, improving their dispersibility in concrete.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. The basic principles and main features of the present invention have been described above with specific implementation schemes. Based on the present invention, some modifications or substitutions can be made, but these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of protection claimed by the present invention.

Claims

1. A basalt fiber composite rubber reinforced concrete, characterized in that, The raw materials include the following parts by weight: 35-45 parts aluminate cement, 45-65 parts coarse aggregate, 30-60 parts fine aggregate, 8-15 parts fly ash, 5-10 parts modified basalt fiber, 2-6 parts waste tire rubber granules, 0.1-0.5 parts water-reducing agent, and 8-15 parts water. The structural formula of the water-reducing agent is as follows: ； The preparation process of the water-reducing agent is as follows: (1) Add formaldehyde solution and dimethylamine solution to the aqueous solution of sodium lignosulfonate, react under heating conditions, cool the reaction solution to room temperature and adjust the pH to 3.0-3.2 after the reaction is completed, centrifuge, collect the product, and dry to obtain intermediate 1; The structure of intermediate 1 is as follows: (2) Add intermediate 1 and bromopropane to a mixed solvent of acetone / water, reflux the reaction, filter and collect the solid product after the reaction is completed, recrystallize with ethanol to obtain the water-reducing agent; The preparation process of the modified basalt fiber is as follows: (a) The pretreated basalt fibers were added to a toluene solution of 3-aminopropyltriethoxysilane and refluxed at 100-120°C. The mixture was then filtered, washed, and dried to obtain aminated basalt fibers. (b) The aminated basalt fiber is added to N,N-dimethylformamide, and then butyl succinic anhydride is added. The mixture is stirred and reacted, then filtered, washed and dried to obtain modified basalt fiber.

2. The basalt fiber composite rubber reinforced concrete according to claim 1, characterized in that, In step (1), the concentration of sodium lignosulfonate in the aqueous solution is (0.05-0.06) g / mL; the ratio of sodium lignosulfonate, dimethylamine solution, and formaldehyde solution is 1 g: (6-7) mL: (2-3) mL; the concentration of dimethylamine solution is 35-40 wt%; and the concentration of formaldehyde solution is 37 wt%.

3. The basalt fiber composite rubber reinforced concrete according to claim 1, characterized in that, The heating temperature in step (1) is 50-60℃, and the reaction time is 3-6 h.

4. The basalt fiber composite rubber reinforced concrete according to claim 1, characterized in that, In step (2), the ratio of intermediate 1, bromopropane and acetone-water mixed solvent is 1 g: (5.5-6.7) g: (20-25) mL; the volume ratio of acetone to water in the mixed solvent is 7:3; and the reflux reaction time is 50-55 h.

5. The basalt fiber composite rubber reinforced concrete according to claim 1, characterized in that, The ratio of the toluene solution of 3-aminopropyltriethoxysilane to the pretreated basalt fiber in step (a) is (25-40) mL: 1 g; the mass fraction of 3-aminopropyltriethoxysilane in the toluene solution of 3-aminopropyltriethoxysilane is 10-20%.

6. The basalt fiber composite rubber reinforced concrete according to claim 1, characterized in that, In step (b), the ratio of amino-modified basalt fiber, N,N-dimethylformamide, and butyl succinic anhydride is 1 g: (25-30) mL: (3.5-5) g; the stirring reaction is carried out at a temperature of 50-65℃ for 12-24 h.

7. The basalt fiber composite rubber reinforced concrete according to claim 1, characterized in that, The preparation process of the pretreated basalt fiber in step (a) is as follows: add basalt fiber to hydrochloric acid solution, stir at 45-50℃ for 1-2 hours, filter, wash and dry to obtain the fiber.

8. The method for preparing basalt fiber composite rubber reinforced concrete according to any one of claims 1-7, characterized in that, According to the stated weight proportions, aluminate cement, coarse aggregate, fine aggregate, fly ash, modified basalt fiber, and waste tire rubber granules are mixed evenly to obtain a mixture; water and water-reducing agent are added to the mixture and mixed evenly.

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