A solid waste recycled permeable brick and its preparation method

Abstract

The present invention relates to the technical field of permeable bricks, and provides a solid waste recycled permeable brick and a preparation method thereof. The solid waste recycled permeable brick comprises the following components in parts by weight: 10-20 parts of coal gangue, 10-16 parts of fly ash, 20-30 parts of cement, 44-65 parts of functional aggregate, 2-4 parts of aluminum paste, 140-150 parts of water, 2-4 parts of water reducing agent, and 5-8 parts of pore forming agent; the raw materials of the functional aggregate include blast furnace slag, palygorskite powder and forsterite powder with a weight ratio of 20:1:1-19. Through the above technical solution, the problem of low strength of permeable bricks in the related art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of permeable bricks, and specifically, to a solid waste recycled permeable brick and a preparation method thereof. Background Art

[0002] A permeable brick is a porous product, and the formed road surface can effectively absorb rainwater and realize the penetration of water from the ground surface to the ground. It can not only effectively penetrate and purify water, but also release and store water, and has a wide range of applications. For example, when laid on sidewalks and pedestrian streets, it can quickly penetrate rainwater into the ground; when used in urban leisure squares, commercial squares and other places, while draining water, it can also adjust the local temperature and humidity of the square and improve the square environment.

[0003] At present, permeable bricks mostly use ordinary cementitious materials such as cement and natural aggregates such as river sand and quartz sand, and relatively little solid waste materials are used. Moreover, the hydration of the commonly used cementitious materials is greatly affected by environmental temperature and humidity. In a low-temperature or dry environment, the hydration reaction is incomplete, resulting in slow early strength growth of permeable bricks; there is also an uneven distribution of natural aggregates, and these factors will affect the strength of permeable bricks.

[0004] Therefore, it is of great significance to develop a permeable brick made of solid waste. It can not only realize the reuse of solid waste materials, but also improve the strength of permeable bricks, which plays an important role in improving the performance of permeable bricks, promoting the resource utilization of solid waste and realizing environmental sustainable development. Summary of the Invention

[0005] The present invention provides a solid waste recycled permeable brick and a preparation method thereof, which solves the problem of low strength of permeable bricks in related technologies.

[0006] The technical solution of the present invention is as follows:

[0007] The present invention provides a solid waste recycled permeable brick, which comprises the following components in parts by weight:

[0008] 10 - 20 parts of coal gangue, 10 - 16 parts of fly ash, 20 - 30 parts of cement, 44 - 65 parts of functional aggregate, 2 - 4 parts of aluminum paste, 140 - 150 parts of water, 2 - 4 parts of water reducer, 5 - 8 parts of pore-forming agent;

[0009] The raw materials of the functional aggregate include blast furnace slag, palygorskite powder and forsterite powder in a weight ratio of 20:1:1 - 19.

[0010] As a further technical solution, the weight ratio of the blast furnace slag, palygorskite powder and forsterite powder is 20:1:4 - 9.

[0011] When the weight ratio of blast furnace slag, palygorskite powder and forsterite powder is 20:1:4 - 9, the splitting tensile strength of the solid waste recycled permeable brick can reach 6.8 - 6.9 MPa, further improving the strength of the solid waste recycled permeable brick; while when the weight ratio of blast furnace slag, palygorskite powder and forsterite powder is outside the range of 20:1:4 - 9, the strength of the solid waste recycled permeable brick is slightly worse.

[0012] As a further technical solution, the preparation method of the functional aggregate includes the following steps:

[0013] A1. Mix the blast furnace slag and forsterite powder evenly and perform ball milling treatment to obtain a mixture;

[0014] A2. Add palygorskite powder and water to the mixture, stir, granulate, sinter, and cool to obtain the functional aggregate.

[0015] As a further technical solution, in step A1, during the ball milling treatment, the ball milling speed is 150 - 200 r / min and the ball milling time is 1 - 2 h;

[0016] In step A2, the stirring is divided into primary stirring and secondary stirring. During the primary stirring, the rotation speed is 300 - 500 r / min and the time is 50 - 80 min; during the secondary stirring, the rotation speed is 800 - 900 r / min and the time is 30 - 60 min;

[0017] In step A2, the sintering is divided into primary sintering and secondary sintering. During the primary sintering, the temperature is 715 - 820 °C and the time is 20 - 30 s; during the secondary sintering, the temperature is 960 - 980 °C and the time is 10 - 15 s.

[0018] In the present invention, during the preparation process of the functional aggregate, first, the blast furnace slag and forsterite powder are ball milled at an appropriate ball milling speed. While refining the particles of the blast furnace slag and forsterite powder, it can make the blast furnace slag and forsterite powder mix more evenly, and also provide higher reaction activity for the subsequent sintering process, so as to better combine with the palygorskite powder;

[0019] During the combination with palygorskite powder, first stir at 300 - 500 r / min for 50 - 80 min. The low-speed and long-time stirring is to evenly disperse the palygorskite powder in the system and fully exert its adsorption and combination effect with the blast furnace slag and forsterite powder. Then stir at 800 - 900 r / min for 30 - 60 min. The stirring speed is increased and the stirring time is shortened to further adjust the uniform and dense degree of the three, laying a foundation for the subsequent sintering;

[0020] During the sintering process, within the temperature range of 715 - 820 °C, due to the evaporation of water in the system, pores can be formed in the aggregate during sintering, facilitating the further homogenization of pores under the action of aluminum paste during the preparation of permeable bricks. Sintering at 960 - 980 °C for a short time can form a stable aggregate structure and chemical bonds, thereby enhancing the strength of the functional aggregate.

[0021] As a further technical solution, the water reducer is one or two of lignosulfonate and naphthalene-based water reducer;

[0022] The pore former is one or two of polyvinyl alcohol and starch.

[0023] As a further technical solution, the functional aggregate is a bisphenol A epoxy acrylate composite functional aggregate, and the raw materials of the bisphenol A epoxy acrylate composite functional aggregate include functional aggregate and bisphenol A epoxy acrylate with a weight ratio of 30:1 - 4.

[0024] As a further technical solution, the weight ratio of the functional aggregate to bisphenol A epoxy acrylate is 30:2 - 3.

[0025] In the present invention, the functional aggregate formed by blast furnace slag, forsterite powder and palygorskite powder is compounded with bisphenol A epoxy acrylate, which can improve the water permeability of the solid waste recycled permeable brick. The possible reason is speculated as follows: While bisphenol A epoxy acrylate improves the interfacial bonding between the functional aggregate and the other components in the solid waste recycled permeable brick, during the forming process of the solid waste recycled permeable brick, it can regulate the tightness between the functional aggregate and other components, and can promote the formation of an interconnected pore structure among the components to a certain extent, thereby improving the water permeability of the solid waste recycled permeable brick. When the weight ratio of the functional aggregate to bisphenol A epoxy acrylate is 30:2 - 3, the water permeability of the solid waste recycled permeable brick can be more excellent.

[0026] As a further technical solution, the preparation method of the bisphenol A epoxy acrylate composite functional aggregate includes the following steps;

[0027] B1. Mix the blast furnace slag and forsterite powder evenly and perform ball milling treatment to obtain a mixture;

[0028] B2. Add palygorskite powder and water to the mixture, stir, granulate, sinter and cool to obtain a functional aggregate;

[0029] B3. Disperse the bisphenol A epoxy acrylate in ethyl acetate, add the functional aggregate and dimethoxybenzyl benzoate, mix evenly, irradiate with ultraviolet light and dry to obtain the bisphenol A epoxy acrylate composite functional aggregate.

[0030] As a further technical solution, the weight ratio of the functional aggregate to ethyl acetate is 1:0.4 to 0.6.

[0031] As a further technical solution, the weight ratio of bisphenol A epoxy acrylate to dimethoxybenzyl benzoate is 20:1.

[0032] As a further technical solution, the mixing is carried out by stirring; during the stirring, the temperature is 50 to 60 °C, the speed is 400 to 600 r / min, and the time is 4 to 6 h.

[0033] As a further technical solution, the time of ultraviolet light irradiation is 2 to 5 min.

[0034] The present invention also provides a method for preparing the solid waste recycled permeable brick, comprising the following steps:

[0035] S1. Mix the gangue, fly ash, cement, functional aggregate and 60% - 70% by weight of water evenly to obtain a mixed slurry I;

[0036] S2. Add the remaining weight of water, water reducing agent and pore forming agent to the mixed slurry I, mix evenly to obtain a mixed slurry II, and add aluminum paste to the mixed slurry II, and stir to obtain a mixed slurry III;

[0037] S3. Press the mixed slurry III into shape and cure to obtain the solid waste recycled permeable brick.

[0038] As a further technical solution, in steps S1 and S2, the mixing is carried out by stirring, and the stirring speed is independently 300 to 400 r / min, and the stirring time is independently 13 to 25 min.

[0039] As a further technical solution, in step S3, during the pressing into shape, the pressure is 12 to 18 MPa.

[0040] As a further technical solution, in step S3, during the curing, the temperature is 24 to 28 °C, and the curing time is 28 d.

[0041] The working principle and beneficial effects of the present invention are as follows:

[0042] 1. In the present invention, the functional aggregate formed by blast furnace slag, palygorskite powder and forsterite powder is used as the main base material. Under the effective action of gangue, fly ash, cement, aluminum paste, water reducing agent and pore forming agent, a permeable brick with uniform pores and high strength is obtained. Among them, solid waste materials such as gangue, fly ash and blast furnace slag are used to replace traditional natural aggregates such as river sand and quartz sand, realizing the effective utilization of solid waste materials to a certain extent and reducing the environmental pollution caused by the discharge of solid waste materials such as slag.

[0043] 2. In the present invention, the functional aggregate formed by blast furnace slag, palygorskite powder and forsterite powder is added to the components of the permeable brick, which can endow the permeable brick with good bearing capacity. Among them, the functional aggregate formed by the composite treatment of blast furnace slag, palygorskite powder and forsterite powder has a uniform and stable structure, which can play a good supporting role in the permeable brick, thereby improving the strength of the permeable brick. Specific Embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0045] In the following examples and comparative examples, the average particle size of blast furnace slag is 45 μm; the average particle size of forsterite powder is 48 μm; the average particle size of palygorskite powder is 10 μm; the average particle size of coal gangue is 45 μm; the average particle size of fly ash is 25 μm; the cement is ordinary Portland cement, with the model of P·O 42.5; the water reducing agent is calcium lignosulfonate; the pore forming agent is polyvinyl alcohol, with the model of PVA 1788; the model of aluminum paste is GLS-65; the model of bisphenol A epoxy acrylate is YC3381S.

[0046] Example 1

[0047] The preparation method of the functional aggregate includes the following steps:

[0048] A1. Mix 40 parts of blast furnace slag and 2 parts of forsterite powder evenly, and ball mill at 150 r / min for 2 h to obtain a mixture;

[0049] A2. Add 2 parts of palygorskite powder and 100 parts of water to the above mixture, stir at 300 r / min for 80 min, then stir at 800 r / min for 60 min. After granulation, sinter at 715 °C for 30 s, then raise the temperature to 960 °C at a heating rate of 50 °C / min, sinter at 960 °C for 15 s, and cool to obtain the functional aggregate;

[0050] A preparation method of a solid waste recycled permeable brick includes the following steps:

[0051] S1. Mix 10 parts of coal gangue, 10 parts of fly ash, 20 parts of cement, 44 parts of the above functional aggregate and 84 parts of water evenly by stirring at 300 r / min for 25 min to obtain a mixed slurry Ⅰ;

[0052] S2. Add 56 parts of water, 2 parts of calcium lignosulfonate, and 5 parts of polyvinyl alcohol to the above-mentioned mixed slurry I, stir at 300 r / min for 25 min until evenly mixed to obtain mixed slurry II. Add 2 parts of aluminum paste to mixed slurry II and stir to obtain mixed slurry III;

[0053] S3. Press the above-mentioned mixed slurry III into a mold under a pressure of 12 MPa, demold, and cure at 24 °C for 28 d to obtain a solid waste recycled permeable brick.

[0054] Example 2

[0055] The preparation method of the functional aggregate includes the following steps:

[0056] A1. Mix 40 parts of blast furnace slag and 6 parts of forsterite powder evenly, and ball mill at 180 r / min for 1.5 h to obtain a mixture;

[0057] A2. Add 2 parts of palygorskite powder and 100 parts of water to the above-mentioned mixture, stir at 400 r / min for 65 min, then stir at 850 r / min for 45 min. After granulation, sinter at 775 °C for 25 s, then raise the temperature to 970 °C at a heating rate of 50 °C / min, sinter at 970 °C for 15 s, and cool to obtain the functional aggregate;

[0058] A preparation method of a solid waste recycled permeable brick includes the following steps:

[0059] S1. Mix 15 parts of coal gangue, 13 parts of fly ash, 25 parts of cement, 60 parts of the above-mentioned functional aggregate, and 94.9 parts of water evenly by stirring at 350 r / min for 18 min to obtain mixed slurry I;

[0060] S2. Add 51.1 parts of water, 3 parts of calcium lignosulfonate, and 6 parts of polyvinyl alcohol to the above-mentioned mixed slurry I, stir at 350 r / min for 18 min until evenly mixed to obtain mixed slurry II. Add 3 parts of aluminum paste to mixed slurry II and stir to obtain mixed slurry III;

[0061] S3. Press the above-mentioned mixed slurry III into a mold under a pressure of 16 MPa, demold, and cure at 26 °C for 28 d to obtain a solid waste recycled permeable brick.

[0062] Example 3

[0063] The preparation method of the functional aggregate includes the following steps:

[0064] A1. Mix 32.5 parts of blast furnace slag and 30.875 parts of forsterite powder evenly, and ball mill at 200 r / min for 1 h to obtain a mixture;

[0065] A2. Add 1.625 parts of palygorskite powder and 100 parts of water to the above mixture, stir at 500 r / min for 50 min, then stir at 900 r / min for 30 min. After granulation, sinter at 820 °C for 20 s, then heat up to 980 °C at a heating rate of 50 °C / min and sinter at 980 °C for 10 s, and then cool to obtain functional aggregates;

[0066] A preparation method of a solid waste recycled permeable brick, comprising the following steps:

[0067] S1. Mix 20 parts of coal gangue, 16 parts of fly ash, 30 parts of cement, 65 parts of the above functional aggregates and 105 parts of water evenly by stirring at 400 r / min for 13 min to obtain mixed slurry Ⅰ;

[0068] S2. Add 45 parts of water, 4 parts of calcium lignosulfonate and 8 parts of polyvinyl alcohol to the above mixed slurry Ⅰ, stir evenly at 400 r / min for 13 min to obtain mixed slurry Ⅱ, and add 4 parts of aluminum paste to mixed slurry Ⅱ and stir to obtain mixed slurry Ⅲ;

[0069] S3. Press the above mixed slurry Ⅲ into shape in a mold under a pressure of 18 MPa, demold, and cure at 28 °C for 28 d to obtain a solid waste recycled permeable brick.

[0070] Example 4

[0071] The difference between this example and Example 2 is only that, in this example, during the preparation process of the functional aggregates, 6 parts of forsterite powder are replaced by 20 parts of forsterite powder.

[0072] Example 5

[0073] The difference between this example and Example 2 is only that, in this example, during the preparation process of the functional aggregates, 6 parts of forsterite powder are replaced by 8 parts of forsterite powder.

[0074] Example 6

[0075] The difference between this example and Example 2 is only that, in this example, during the preparation process of the functional aggregates, 6 parts of forsterite powder are replaced by 18 parts of forsterite powder.

[0076] Example 7

[0077] The difference between this example and Example 6 is only that, in this example, the functional aggregates are bisphenol A type epoxy acrylate composite functional aggregates, and the preparation method thereof includes the following steps:

[0078] B1. Mix 40 parts of blast furnace slag and 18 parts of forsterite powder evenly, and ball mill at 180 r / min for 1.5 h to obtain a mixture;

[0079] B2. Add 2 parts of palygorskite powder and 100 parts of water to the above mixture. Stir at 400 r / min for 65 min, then stir at 850 r / min for 45 min. After granulation, sinter at 775 °C for 25 s, then heat up to 970 °C at a heating rate of 50 °C / min and sinter at 970 °C for 15 s. Cool to obtain the functional aggregate;

[0080] B3. Disperse 2 parts of bisphenol A epoxy acrylate in 30 parts of ethyl acetate, then add 60 parts of the above functional aggregate and 0.1 part of dimethyl benzyl ketal. Stir at 50 °C at a stirring speed of 500 r / min for 5 h to mix evenly. Irradiate with ultraviolet light for 3 min and dry to obtain the bisphenol A epoxy acrylate composite functional aggregate;

[0081] A preparation method of a solid waste recycled permeable brick, comprising the following steps:

[0082] S1. Mix 15 parts of coal gangue, 13 parts of fly ash, 25 parts of cement, 60 parts of the above bisphenol A epoxy acrylate composite functional aggregate and 94.9 parts of water evenly by stirring at 350 r / min for 18 min to obtain mixed slurry I;

[0083] S2. Add 51.1 parts of water, 3 parts of calcium lignosulfonate and 6 parts of polyvinyl alcohol to the above mixed slurry I. Stir at 350 r / min for 18 min to mix evenly to obtain mixed slurry II. Add 3 parts of aluminum paste to mixed slurry II and stir to obtain mixed slurry III;

[0084] S3. Press the above mixed slurry III into a mold under a pressure of 16 MPa, demold, and cure at 26 °C for 28 d to obtain the solid waste recycled permeable brick.

[0085] Example 8

[0086] The difference between this example and Example 7 is only that in this example, 2 parts of bisphenol A epoxy acrylate are replaced by 8 parts of bisphenol A epoxy acrylate.

[0087] Example 9

[0088] The difference between this example and Example 7 is only that in this example, 2 parts of bisphenol A epoxy acrylate are replaced by 4 parts of bisphenol A epoxy acrylate.

[0089] Example 10

[0090] The difference between this example and Example 7 is only that in this example, 2 parts of bisphenol A epoxy acrylate are replaced by 6 parts of bisphenol A epoxy acrylate.

[0091] Example 11

[0092] A preparation method of a solid waste recycled permeable brick, comprising the following steps:

[0093] S1. Mix 10 parts of coal gangue, 10 parts of fly ash, 20 parts of cement, 40 parts of blast furnace slag, 2 parts of forsterite powder, 2 parts of palygorskite powder and 84 parts of water evenly by stirring at 300 r / min for 25 min to obtain a mixed slurry Ⅰ;

[0094] S2. Add 56 parts of water, 2 parts of calcium lignosulfonate and 5 parts of polyvinyl alcohol to the above mixed slurry Ⅰ, stir evenly at 300 r / min for 25 min to obtain a mixed slurry Ⅱ, and add 2 parts of aluminum paste to the mixed slurry Ⅱ, stir to obtain a mixed slurry Ⅲ;

[0095] S3. Press the above mixed slurry Ⅲ into a mold under a pressure of 12 MPa, demold, and cure at 24 °C for 28 d to obtain a solid waste recycled permeable brick.

[0096] Comparative Example 1

[0097] The difference between this comparative example and Example 1 is only that in this comparative example, the palygorskite powder is replaced with an equal amount of zeolite.

[0098] Comparative Example 2

[0099] The difference between this comparative example and Example 1 is only that in this comparative example, the forsterite powder is replaced with an equal amount of fayalite powder.

[0100] Comparative Example 3

[0101] The difference between this comparative example and Example 1 is only that in this comparative example, the blast furnace slag is replaced with an equal amount of steel slag.

[0102] Comparative Example 4

[0103] The difference between this comparative example and Example 1 is only that in this comparative example, both the palygorskite powder and the forsterite powder are replaced with an equal amount of blast furnace slag.

[0104] Comparative Example 5

[0105] The difference between this comparative example and Example 1 is only that in this comparative example, both the blast furnace slag and the palygorskite powder are replaced with an equal amount of forsterite powder.

[0106] Comparative Example 6

[0107] The difference between this comparative example and Example 1 is only that in this comparative example, both the blast furnace slag and the forsterite powder are replaced with an equal amount of palygorskite powder.

[0108] Comparative Example 7

[0109] The difference between this comparative example and Example 1 is only that in this comparative example, no functional aggregate was added.

[0110] Experimental Example 1

[0111] The split tensile strength tests of the solid waste recycled permeable bricks prepared in Examples 1 to 6, Example 11 and Comparative Examples 1 to 7 were carried out according to the method in GB / T 25993-2023 "Permeable Pavement Bricks and Permeable Road Panels". Among them, the load was uniformly applied at a loading rate of 0.05 MPa / s until the specimen broke, and the result was the average value of 5 specimens. The test results are shown in Table 1:

[0112] Table 1 Test results of split tensile strength of Examples 1 to 6, Example 11 and Comparative Examples 1 to 7

[0113]

[0114] Compared with Comparative Examples 1 to 7, the split tensile strength of the solid waste recycled permeable bricks prepared in Examples 1 to 6 increased, indicating that when the functional aggregate includes blast furnace slag, palygorskite powder and forsterite powder, blast furnace slag, palygorskite powder and forsterite powder have a synergistic effect and can significantly improve the strength of the solid waste recycled permeable bricks.

[0115] Experimental Example 2

[0116] The permeability coefficient tests of the solid waste recycled permeable bricks prepared in Examples 6 to 10 were carried out according to the method in GB / T 25993-2023 "Permeable Pavement Bricks and Permeable Road Panels". Among them, the test result was the average value of 3 specimens. The test results are shown in Table 2:

[0117] Table 2 Test results of permeability coefficient of Examples 6 to 10

[0118]

[0119] Compared with Example 6, the permeability coefficient of the solid waste recycled permeable bricks prepared in Examples 7 to 10 increased, indicating that the use of bisphenol A epoxy acrylate to compound the functional aggregate can improve the permeability performance of the solid waste recycled permeable bricks.

[0120] Experimental Example 3

[0121] The solid waste recycled permeable bricks prepared in Examples 1 to 3 were tested for freeze-thaw resistance according to the method in GB / T 25993-2023 "Permeable Pavement Bricks and Permeable Road Panels". The freeze-thaw cycle was 150 times. The average strength loss rate of 5 specimens after 150 freeze-thaw cycles was tested. The average strength loss rate (%) = (average compressive strength of 5 non-freeze-thaw compressive strength specimens - average compressive strength of 5 freeze-thaw compressive strength specimens) / average compressive strength of 5 non-freeze-thaw compressive strength specimens × 100%. The test results are shown in Table 3:

[0122] Table 3 Test Results of Freeze-Thaw Resistance of Examples 1 to 3

[0123]

[0124] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A solid waste recycled permeable brick, characterized in that: The composition comprises the following components in parts by weight: 10-20 parts of coal gangue, 10-16 parts of fly ash, 20-30 parts of cement, 44-65 parts of functional aggregate, 2-4 parts of aluminum paste, 140-150 parts of water, 2-4 parts of water reducer, 5-8 parts of pore-forming agent; The raw materials of the functional aggregate include blast furnace slag, palygorskite powder and forsterite powder in a weight ratio of 20:1:1-19; The preparation method of the functional aggregate comprises the following steps: A1, mixing the blast furnace slag and forsterite powder uniformly, and ball milling to obtain a mixture; A2. Adding palygorskite powder and water to the mixture, stirring, granulating, sintering, and cooling to obtain functional aggregate.

2. The solid waste recycled permeable brick according to claim 1, characterized in that: The weight ratio of the blast furnace slag, palygorskite powder and forsterite powder is 20:1:4-9.

3. The solid waste recycled permeable brick according to claim 1, characterized in that: In step A1, during the ball milling treatment, the ball milling speed is 150-200 r / min, and the ball milling time is 1-2 h.

4. The solid waste recycled permeable brick according to claim 1, characterized in that: In step A2, the stirring is divided into primary stirring and secondary stirring. During the primary stirring, the speed is 300-500 r / min and the time is 50-80 min; during the secondary stirring, the speed is 800-900 r / min and the time is 30-60 min; In step A2, the sintering is divided into primary sintering and secondary sintering. During the primary sintering, the temperature is 715-820° C. and the time is 20-30 seconds; during the secondary sintering, the temperature is 960-980° C. and the time is 10-15 seconds.

5. The solid waste recycled permeable brick according to claim 1, characterized in that: The water reducer is one or both of lignin sulfonate and naphthalene-based water reducer; The pore-forming agent is one or both of polyvinyl alcohol and starch.

6. The solid waste recycled permeable brick according to claim 1, characterized in that: The functional aggregate is a bisphenol A epoxy acrylate composite functional aggregate, and the raw materials of the bisphenol A epoxy acrylate composite functional aggregate include functional aggregate and bisphenol A epoxy acrylate in a weight ratio of 30:1-4.

7. The solid waste recycled permeable brick according to claim 6, characterized in that: The weight ratio of the functional aggregate to bisphenol A epoxy acrylate is 30:2-3.

8. The method for preparing a solid waste recycled permeable brick according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Evenly mix the coal gangue, fly ash, cement, functional aggregate and 60% to 70% by weight of water to obtain mixed slurry I; S2, adding the remaining weight of water, water reducing agent and pore forming agent to the mixed slurry I, mixing evenly to obtain mixed slurry II, adding aluminum powder paste to the mixed slurry II, stirring to obtain mixed slurry III; S3, pressing the mixed slurry III into shape, and curing it to obtain solid waste recycled permeable bricks.

9. The method for preparing a solid waste recycled permeable brick according to claim 8, characterized in that: In step S3, during the pressing process, the pressure is 12-18 MPa.

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