Recycled concrete material and preparation method thereof

Abstract

The invention relates to the technical field of concrete, in particular to a recycled concrete material and a preparation method thereof. The recycled concrete material is prepared from the following raw materials in parts by weight: 20-30 parts of recycled aggregate, 4-8 parts of fiber filler, 10-14 parts of fly ash, 5-12 parts of cement, 4-7 parts of compound powder, 3-7 parts of gravel, 6-10 parts of a water reducing agent and 30-40 parts of water, the recycled aggregate, the fiber filler, the fly ash, the cement, the compound powder and the gravel are put into mixing equipment to be mixed and stirred, the water reducing agent and the water are added into the mixture after the materials are mixed uniformly, and the mixture is continuously stirred uniformly to obtain a finished product of the recycled concrete material. The prepared recycled concrete material not only has good mechanical properties, but also has excellent frost resistance, and the quality of the recycled concrete material is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of concrete, in particular to a recycled concrete material and a preparation method thereof. Background Art

[0002] Concrete is a general term for engineering composite materials that are made of aggregates bonded together by cementitious materials. The term concrete usually refers to cement as a cementitious material, sand and stone as aggregates, and water (which may contain admixtures and additives) in a certain proportion, and then mixed to obtain cement concrete, also known as ordinary concrete, which is widely used in civil engineering.

[0003] Recycled concrete refers to new concrete made by crushing, cleaning, and grading discarded concrete blocks, mixing them with grading in a certain proportion, partially or completely replacing natural aggregates such as sand and gravel (mainly coarse aggregates), and then adding cement, water, etc.

[0004] In the patent document with application number "CN202310337860.3" and titled "A recycled concrete material and its preparation method", it is recorded that "it is made of the following raw materials in parts by weight: 2 to 12 parts of weak alkaline coupling agent; 120 to 230 parts of water; 1 to 11 parts of water reducer; 450 to 550 parts of sand; 250 to 350 parts of cement, 50 to 150 parts of fly ash, 30 to 130 parts of granulated blast furnace slag; 450 to 950 parts of natural crushed stone, and 700 to 800 parts of recycled coarse aggregate. The preparation method provided by the present invention is simple and does not require high-temperature heating or drying processes, and is easy to promote; the basic mechanical and durability properties of the prepared concrete are higher than those of ordinary concrete, and a large amount of fly ash and slag are used to replace cement, thereby reducing the amount of cement used, thereby reducing production costs, and reducing the pollution of industrial by-products such as fly ash and slag to the environment and the emission of construction solid waste."

[0005] Although the recycled concrete material manufactured by the above patent document has the advantages of utilizing recycled coarse aggregate and reducing production costs, its own mechanical and frost resistance properties are relatively insufficient and still need to be further improved. Based on this, the present invention provides a recycled concrete material and a preparation method thereof to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a recycled concrete material and a preparation method thereof. The prepared recycled concrete material not only has good mechanical properties, but also has excellent antifreeze properties, effectively ensuring its quality.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The first aspect of the present invention provides a recycled concrete material, which is composed of the following raw materials in parts by weight: 20 to 30 parts of recycled aggregate, 4 to 8 parts of fiber filler, 10 to 14 parts of fly ash, 5 to 12 parts of cement, 4 to 7 parts of compound powder, 3 to 7 parts of crushed stone, 6 to 10 parts of water reducer and 30 to 40 parts of water.

[0009] The present invention is further configured as follows: the preparation process of the recycled aggregate is as follows:

[0010] The waste concrete powder is put into the soaking liquid at a dosage ratio of 0.8 to 1.2 g / mL, and then ultrasonically treated for 10 to 20 minutes, and then allowed to stand for 20 to 30 minutes. After extraction, it is dried at a temperature of 100 to 108° C. for 22 to 24 hours to obtain a first product;

[0011] The first product is added into a water glass solution with a concentration of 4.5-6.5% at a solid-liquid ratio of 0.02-0.12 g / mL, treated at 50-60° C. for 10-12 hours, extracted, and dried at 50-60° C. to constant weight to obtain a second product;

[0012] The obtained second product is placed in a curing room at a temperature of 20-22° C. and a humidity of 70-74% for 22-24 hours, and then placed in a carbonization device at a pressure of 0.1-0.3 MPa for carbonization for 22-24 hours.

[0013] The present invention is further configured as follows: the soaking liquid is formed by mixing N-tert-butyl-2-benzothiazole sulfonamide and ethanol in a mass ratio of 0.12 to 0.22:1.

[0014] The present invention is further configured as follows: the CO2 concentration during the carbonization treatment is 30-80%.

[0015] The present invention is further configured as follows: the preparation process of the fiber filler is as follows:

[0016] The sugarcane straw fiber is immersed in a sodium hydroxide solution with a concentration of 2.5 to 5.5% at a dosage ratio of 0.2 to 0.8 g / mL for 15 to 17 hours, then washed with deionized water for 2 to 4 times, and dried to obtain pretreated fiber;

[0017] The silane coupling KH-550 is added into an ethanol solution with a concentration of 86-90% at a dosage ratio of 0.12-0.22:1, and stirred at 120-220 r / min for 20-30 min to obtain a mixed solution;

[0018] Nano-silicon dioxide is added into the mixed solution at a dosage ratio of 0.32-0.54 g / mL and ultrasonically treated for 20-30 minutes, and then the pretreated fiber is added thereto, and the ultrasonic treatment is continued for 20-24 minutes. After filtration, the mixture is dried at 30-35° C. to constant weight to obtain a fiber filler.

[0019] The present invention is further configured as follows: the addition amount of the nano silicon dioxide is 65-85% of the mass of the pretreated fiber.

[0020] The present invention is further configured as follows: the composite powder is formed by mixing nano calcium carbonate and nano graphene oxide in a mass ratio of 1:0.08 to 0.22.

[0021] The present invention is further configured as follows: the water reducing agent is selected from any one of polyacrylate and polystyrene ester.

[0022] The present invention is further configured as follows: the crushed stone is mixed with limestone and basalt in a mass ratio of 1:0.2-0.5, and the particle size range of the crushed stone is 5-20 mm.

[0023] The second aspect of the present invention: also provides a method for preparing the above-mentioned recycled concrete material, characterized in that it comprises the following steps:

[0024] Step 1: accurately weigh and prepare recycled aggregate, fiber filler, fly ash, cement, compound powder, crushed stone, water reducer and water, and put the recycled aggregate, fiber filler, fly ash, cement, compound powder and crushed stone into a mixing equipment for mixing and stirring;

[0025] Step 2: After the mixture is evenly mixed, add water reducing agent and water, continue to stir evenly, and obtain the finished product of recycled concrete material.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention uses recycled aggregate, fiber filler, fly ash, cement, compound powder, crushed stone, water reducer and water as raw materials, and the recycled aggregate, fiber filler, fly ash, cement, compound powder and crushed stone are put into a mixing device for mixing and stirring, and after being evenly mixed, water reducer and water are added thereto, and stirring is continued to be evenly obtained to obtain a finished recycled concrete material. The recycled concrete material prepared by the present invention not only has good mechanical properties, but also has excellent antifreeze properties, which effectively guarantees its quality. The recycled concrete material and the preparation method thereof provided by the present invention have a broader market prospect and are more suitable for promotion. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] The present embodiment provides a recycled concrete material, which is composed of the following raw materials in parts by weight: 20 parts of recycled aggregate, 4 parts of fiber filler, 10 parts of fly ash, 5 parts of cement, 4 parts of compound powder, 3 parts of crushed stone, 6 parts of water reducer and 30 parts of water.

[0031] In this embodiment, it should be noted that the fly ash was purchased from Hebei Zongrun Mineral Products Co., Ltd., and the cement used was P·O 42.5R grade cement (purchased from Guangdong Guangcheng Building Materials Co., Ltd.).

[0032] The preparation process of recycled aggregate is as follows:

[0033] The waste concrete powder was put into the soaking liquid at a dosage ratio of 0.8 g / mL and ultrasonically treated for 10 minutes, then allowed to stand for 20 to 30 minutes, extracted, and dried at 100° C. for 22 hours to obtain the first product;

[0034] The first product was added into a 4.5% water glass solution at a solid-liquid ratio of 0.02 g / mL, treated at 50°C for 10 hours, extracted, and dried at 50°C to constant weight to obtain a second product;

[0035] The obtained second product was placed in a curing room at a temperature of 20° C. and a humidity of 70% for 22 hours, and then placed in a carbonization device at a pressure of 0.1 MPa for carbonization for 22 hours.

[0036] Furthermore, the soaking liquid is prepared by mixing N-tert-butyl-2-benzothiazole sulfonamide and ethanol in a mass ratio of 0.12:1.

[0037] The CO2 concentration during carbonization treatment is 30%.

[0038] Furthermore, the preparation process of the fiber filler is as follows:

[0039] The sugarcane straw fiber was immersed in a 2.5% sodium hydroxide solution at a dosage ratio of 0.2 g / mL for 15 h, then washed twice with deionized water, and dried to obtain pretreated fiber;

[0040] The silane coupling KH-550 was added into an ethanol solution with a concentration of 86% at a dosage ratio of 0.12:1, and stirred at 120 r / min for 20 min to obtain a mixed solution;

[0041] Nano-silica was added into the mixed solution at a dosage ratio of 0.32 g / mL and ultrasonically treated for 20 minutes, and then the pretreated fiber was added thereto, and the ultrasonic treatment was continued for 20 minutes. After filtration, the mixture was dried at 30° C. to constant weight to obtain a fiber filler.

[0042] The added amount of nano-silicon dioxide is 65% of the mass of the pretreated fiber.

[0043] In addition, the composite powder is mixed by nano-calcium carbonate and nano-graphene oxide in a mass ratio of 1:0.08.

[0044] Polyacrylate is used as water reducing agent.

[0045] The crushed stone is mixed with limestone and basalt in a mass ratio of 1:0.2, and the particle size range of the crushed stone is 5 mm.

[0046] In this embodiment, it should be noted that the polyacrylate was purchased from Foshan Keerle Building Materials Co., Ltd., the limestone was purchased from Jiangxi Jingfu Environmental Protection Building Materials Co., Ltd., and the basalt was purchased from Shijiazhuang Warner Mineral Products Co., Ltd.

[0047] This embodiment also provides a method for preparing the above-mentioned recycled concrete material, which is characterized by comprising the following steps:

[0048] Step 1: accurately weigh and prepare recycled aggregate, fiber filler, fly ash, cement, compound powder, crushed stone, water reducer and water, and put the recycled aggregate, fiber filler, fly ash, cement, compound powder and crushed stone into a mixing equipment for mixing and stirring;

[0049] Step 2: After the mixture is evenly mixed, add water reducing agent and water, continue to stir evenly, and obtain the finished product of recycled concrete material.

[0050] Example 2

[0051] The preparation method of the recycled concrete material provided in this embodiment is basically the same as that in Embodiment 1, except that: the specific raw material composition and the specific preparation method of the recycled concrete material in this embodiment are different; the specific raw material composition and the specific preparation method of the recycled concrete material in this embodiment are as follows:

[0052] The present embodiment provides a recycled concrete material, which is composed of the following raw materials in parts by weight: 25 parts of recycled aggregate, 6 parts of fiber filler, 12 parts of fly ash, 7 parts of cement, 5 parts of compound powder, 5 parts of crushed stone, 8 parts of water reducer and 35 parts of water.

[0053] In this embodiment, it should be noted that the fly ash was purchased from Hebei Zongrun Mineral Products Co., Ltd., and the cement used was P·O 42.5R grade cement (purchased from Guangdong Guangcheng Building Materials Co., Ltd.).

[0054] The preparation process of recycled aggregate is as follows:

[0055] The waste concrete powder was put into the soaking liquid at a dosage ratio of 1 g / mL and ultrasonically treated for 15 minutes, then allowed to stand for 25 minutes, extracted, and dried at a temperature of 104° C. for 23 hours to obtain the first product;

[0056] The first product was added into a 5.5% water glass solution at a solid-liquid ratio of 0.07 g / mL, treated at 55°C for 11 hours, extracted, and dried at 55°C to constant weight to obtain a second product;

[0057] The obtained second product was placed in a curing room at a temperature of 21° C. and a humidity of 72% for 23 hours, and then placed in a carbonization device at a pressure of 0.2 MPa for carbonization for 23 hours.

[0058] Furthermore, the soaking liquid is prepared by mixing N-tert-butyl-2-benzothiazole sulfonamide and ethanol in a mass ratio of 0.17:1.

[0059] The CO2 concentration during carbonization treatment was 55%.

[0060] Furthermore, the preparation process of the fiber filler is as follows:

[0061] The sugarcane straw fiber was immersed in a 4% sodium hydroxide solution at a dosage ratio of 0.5 g / mL for 16 h, then washed with deionized water for 3 times, and dried to obtain pretreated fiber;

[0062] The silane coupling KH-550 was added into an ethanol solution with a concentration of 88% at a dosage ratio of 0.17:1, and stirred at 170 r / min for 25 min to obtain a mixed solution;

[0063] Nano-silicon dioxide was added into the mixed solution at a dosage ratio of 0.43 g / mL and ultrasonically treated for 25 minutes, and then the pretreated fiber was added thereto and ultrasonically treated for 202 minutes. After filtration, the mixture was dried at 32° C. to constant weight to obtain a fiber filler.

[0064] The added amount of nano silicon dioxide is 75% of the mass of the pretreated fiber.

[0065] In addition, the composite powder is mixed by nano-calcium carbonate and nano-graphene oxide in a mass ratio of 1:0.12.

[0066] The water reducing agent is polystyrene ester.

[0067] The crushed stone is mixed with limestone and basalt in a mass ratio of 1:0.3, and the particle size range of the crushed stone is 12 mm.

[0068] In this embodiment, it should be noted that the polystyrene ester was purchased from Wuhan Kamik Technology Co., Ltd., the limestone was purchased from Jiangxi Jingfu Environmental Protection Building Materials Co., Ltd., and the basalt was purchased from Shijiazhuang Warner Mineral Products Co., Ltd.

[0069] This embodiment also provides a method for preparing the above-mentioned recycled concrete material, which is characterized by comprising the following steps:

[0070] Step 1: accurately weigh and prepare recycled aggregate, fiber filler, fly ash, cement, compound powder, crushed stone, water reducer and water, and put the recycled aggregate, fiber filler, fly ash, cement, compound powder and crushed stone into a mixing equipment for mixing and stirring;

[0071] Step 2: After the mixture is evenly mixed, add water reducing agent and water, continue to stir evenly, and obtain the finished product of recycled concrete material.

[0072] Example 3

[0073] The preparation method of the recycled concrete material provided in this embodiment is basically the same as that in Embodiment 1, except that: the specific raw material composition and the specific preparation method of the recycled concrete material in this embodiment are different; the specific raw material composition and the specific preparation method of the recycled concrete material in this embodiment are as follows:

[0074] The present embodiment provides a recycled concrete material, which is composed of the following raw materials in parts by weight: 30 parts of recycled aggregate, 8 parts of fiber filler, 14 parts of fly ash, 12 parts of cement, 7 parts of compound powder, 7 parts of crushed stone, 10 parts of water reducer and 40 parts of water.

[0075] In this embodiment, it should be noted that the fly ash was purchased from Hebei Zongrun Mineral Products Co., Ltd., and the cement used was P·O 42.5R grade cement (purchased from Guangdong Guangcheng Building Materials Co., Ltd.).

[0076] The preparation process of recycled aggregate is as follows:

[0077] The waste concrete powder was put into the soaking liquid at a dosage ratio of 1.2 g / mL and ultrasonically treated for 20 minutes, then allowed to stand for 30 minutes, extracted, and dried at a temperature of 108° C. for 24 hours to obtain the first product;

[0078] The first product was added into a 6.5% water glass solution at a solid-liquid ratio of 0.12 g / mL, treated at 60°C for 12 hours, extracted, and dried at 60°C to constant weight to obtain a second product;

[0079] The obtained second product was placed in a curing room at a temperature of 22° C. and a humidity of 74% for 24 hours, and then placed in a carbonization device at a pressure of 0.3 MPa for carbonization for 24 hours.

[0080] Furthermore, the soaking liquid is prepared by mixing N-tert-butyl-2-benzothiazole sulfonamide and ethanol in a mass ratio of 0.22:1.

[0081] The CO2 concentration during carbonization treatment is 80%.

[0082] Furthermore, the preparation process of the fiber filler is as follows:

[0083] The sugarcane straw fiber was immersed in a 5.5% sodium hydroxide solution at a dosage ratio of 0.8 g / mL for 17 h, then washed with deionized water for 4 times, and dried to obtain pretreated fiber;

[0084] The silane coupling KH-550 was added into a 90% ethanol solution at a dosage ratio of 0.22:1, and stirred at 220 r / min for 30 min to obtain a mixed solution;

[0085] Nano-silicon dioxide was added into the mixed solution at a dosage ratio of 0.54 g / mL and ultrasonically treated for 30 minutes, and then the pretreated fiber was added thereto and ultrasonically treated for 24 minutes. After filtration, the mixture was dried at 35° C. to constant weight to obtain a fiber filler.

[0086] The added amount of nano silicon dioxide is 85% of the mass of the pretreated fiber.

[0087] In addition, the composite powder is mixed by nano-calcium carbonate and nano-graphene oxide in a mass ratio of 1:0.22.

[0088] Polyacrylate is used as water reducing agent.

[0089] The crushed stone is mixed with limestone and basalt in a mass ratio of 1:0.5, and the particle size range of the crushed stone is 20 mm.

[0090] In this embodiment, it should be noted that the polyacrylate was purchased from Foshan Keerle Building Materials Co., Ltd., the limestone was purchased from Jiangxi Jingfu Environmental Protection Building Materials Co., Ltd., and the basalt was purchased from Shijiazhuang Warner Mineral Products Co., Ltd.

[0091] This embodiment also provides a method for preparing the above-mentioned recycled concrete material, which is characterized by comprising the following steps:

[0092] Step 1: accurately weigh and prepare recycled aggregate, fiber filler, fly ash, cement, compound powder, crushed stone, water reducer and water, and put the recycled aggregate, fiber filler, fly ash, cement, compound powder and crushed stone into a mixing equipment for mixing and stirring;

[0093] Step 2: After the mixture is evenly mixed, add water reducing agent and water, continue to stir evenly, and obtain the finished product of recycled concrete material.

[0094] Comparative Example 1: The difference from Example 1 is that in this example, an equal amount of waste concrete powder is used instead of recycled aggregate.

[0095] Comparative Example 2: The difference from Example 1 is that in this example, an equal amount of sugarcane straw fibers is used instead of the fiber filler.

[0096] Performance test: The recycled concrete material samples provided in Examples 1 to 3 and Comparative Examples 1 to 2 are marked as Examples 1 to 3 and Comparative Examples 1 to 2, respectively; and the relevant properties of the recycled concrete materials provided in Examples 1 to 3 and Comparative Examples 1 to 2 are tested as follows:

[0097] 1. Mechanical properties test: The test method is to test the mechanical properties of concrete in accordance with GB / T50081-2002 "Standard for Test Methods of Mechanical Properties of Ordinary Concrete".

[0098] 2. Antifreeze performance test: The test method is to conduct a freeze-thaw cycle comparison test after 28 days of curing, referring to the quick freezing method in GB / T50082-2009 "Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete". After 200 freeze-thaw cycles, the relative dynamic elastic modulus of the concrete is tested.

[0099] The obtained test data are recorded in Table 1 and Table 2 below:

[0100] Table 1 Mechanical properties test results of each group of recycled concrete materials

[0101] Group Flexural strength(MPa) Compressive strength(MPa) Example 1 Group 10.2 85.3 Example 2 Group 9.9 84.1 Example 3 Group 10.3 85.5 Comparison group 1 8.6 78.9 Comparison of 2 groups 8.2 75.6

[0102] Table 2 Mechanical properties test results of each group of recycled concrete materials

[0103] Group Relative dynamic elastic modulus (%) Example 1 Group 95.1 Example 2 Group 94.9 Example 3 Group 95.3 Comparison group 1 89.8 Comparison of 2 groups 91.2

[0104] By comparing and analyzing the relevant data in Table 1 and Table 2, it can be seen that the recycled concrete material prepared by the present invention not only has good mechanical properties, but also has excellent antifreeze performance, which effectively guarantees its quality. This shows that the recycled concrete material and the preparation method thereof provided by the present invention have a broader market prospect and are more suitable for promotion.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0106] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A recycled concrete material, characterized in that: The invention is composed of the following raw materials in parts by weight: 20-30 parts of recycled aggregate, 4-8 parts of fiber filler, 10-14 parts of fly ash, 5-12 parts of cement, 4-7 parts of compound powder, 3-7 parts of crushed stone, 6-10 parts of water reducer and 30-40 parts of water.

2. A recycled concrete material according to claim 1, characterized in that: The preparation process of the recycled aggregate is as follows: The waste concrete powder is put into the soaking liquid at a dosage ratio of 0.8 to 1.2 g / mL, and then ultrasonically treated for 10 to 20 minutes, and then allowed to stand for 20 to 30 minutes. After extraction, it is dried at a temperature of 100 to 108° C. for 22 to 24 hours to obtain a first product; The first product is added into a water glass solution with a concentration of 4.5-6.5% at a solid-liquid ratio of 0.02-0.12 g / mL, treated at 50-60° C. for 10-12 hours, extracted, and dried at 50-60° C. to constant weight to obtain a second product; The obtained second product is placed in a curing room at a temperature of 20-22° C. and a humidity of 70-74% for 22-24 hours, and then placed in a carbonization device at a pressure of 0.1-0.3 MPa for carbonization for 22-24 hours.

3. The recycled concrete material according to claim 2, characterized in that: The soaking liquid is prepared by mixing N-tert-butyl-2-benzothiazole sulfonamide and ethanol in a mass ratio of 0.12 to 0.22:

1.

4. The recycled concrete material according to claim 2, characterized in that: The CO2 concentration during the carbonization treatment is 30-80%.

5. The recycled concrete material according to claim 1, characterized in that: The preparation process of the fiber filler is as follows: The sugarcane straw fiber is immersed in a sodium hydroxide solution with a concentration of 2.5 to 5.5% at a dosage ratio of 0.2 to 0.8 g / mL for 15 to 17 hours, then washed with deionized water for 2 to 4 times, and dried to obtain pretreated fiber; The silane coupling KH-550 is added into an ethanol solution with a concentration of 86-90% at a dosage ratio of 0.12-0.22:1, and stirred at 120-220 r / min for 20-30 min to obtain a mixed solution; Nano-silicon dioxide is added into the mixed solution at a dosage ratio of 0.32-0.54 g / mL and ultrasonically treated for 20-30 minutes, and then the pretreated fiber is added thereto, and the ultrasonic treatment is continued for 20-24 minutes. After filtration, the mixture is dried at 30-35° C. to constant weight to obtain a fiber filler.

6. The recycled concrete material according to claim 5, characterized in that: The added amount of the nano silicon dioxide is 65-85% of the mass of the pretreated fiber.

7. The recycled concrete material according to claim 1, characterized in that: The composite powder is prepared by mixing nano calcium carbonate and nano graphene oxide in a mass ratio of 1:0.08-0.

22.

8. The recycled concrete material according to claim 1, characterized in that: The water reducing agent is selected from any one of polyacrylate and polystyrene ester.

9. The recycled concrete material according to claim 1, characterized in that: The crushed stone is formed by mixing limestone and basalt in a mass ratio of 1:0.2-0.5, and the particle size range of the crushed stone is 5-20 mm.

10. The method for preparing a recycled concrete material according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: accurately weigh and prepare recycled aggregate, fiber filler, fly ash, cement, compound powder, crushed stone, water reducer and water, and put the recycled aggregate, fiber filler, fly ash, cement, compound powder and crushed stone into a mixing equipment for mixing and stirring; Step 2: After the mixture is evenly mixed, add water reducing agent and water, continue to stir evenly, and obtain the finished product of recycled concrete material.