A solid waste-based road material, its preparation method and application

Abstract

The present invention relates to a solid waste-based road material, its preparation method and application, and belongs to the technical field of roadbed materials. By weight, the solid waste-based road material comprises the following components: 40-55 parts of drilling cuttings, 20-30 parts of coal gangue, 20-30 parts of bauxite sludge, 15-25 parts of alkaline activator, 0.2-0.5 part of water reducing agent, 0.3-0.8 part of early strength agent and 10-15 parts of water. The present invention uses appropriate proportions of drilling cuttings, coal gangue and bauxite sludge as the solid waste-based material system, supplemented with reasonable additives, and combines magnetic field heat treatment technology for medium and low temperature activation, significantly improving the low temperature hardening performance of the obtained solid waste-based road material, reducing the restriction of environmental temperature on the construction of concrete pavement. Especially in extremely cold regions, such as when dealing with a low temperature environment of -25°C, it can achieve rapid and efficient repair of the road surface, meeting the use requirements of road surface materials in cold regions.

Description

Technical Field

[0001] The present invention relates to the technical field of roadbed materials, and in particular to a solid waste-based road material and a preparation method and application thereof. Background Art

[0002] With the acceleration of the global industrialization process, the emission of various types of industrial solid waste (solid waste) has increased dramatically, bringing tremendous pressure to the environment. Especially in today's increasingly scarce resources, how to effectively treat and utilize these solid wastes and realize the recycling of resources has become a hot issue of global concern. In the field of road construction, traditional roadbed materials such as natural sand and gravel, cement, etc. are not only limited in resources, but also cause damage to the environment during mining and processing, and their costs are also rising. Therefore, finding new environmentally friendly materials to replace traditional roadbed materials, especially using solid waste to prepare road materials, has become an important research direction in the field of road engineering.

[0003] In recent years, although some studies have attempted to convert industrial waste into roadbed materials, these solid waste-based road materials still face many challenges in practical applications, especially in some special environmental conditions, such as extremely cold regions. For example, in cold areas such as northern my country and high-altitude mountainous areas, the low temperature environment places extremely stringent requirements on the construction and performance of pavement materials. Existing solid waste-based road materials often have problems such as poor raw material adaptability and low activity, which leads to great construction difficulties and poor mechanical properties, making it difficult to meet the urgent needs of rapid road repair in cold regions. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a solid waste-based road material and a preparation method and application thereof.

[0005] In a first aspect, the present invention provides a solid waste-based road material, which comprises the following components in parts by weight:

[0006] 40-55 parts of drilling cuttings, 20-30 parts of coal gangue, 20-30 parts of aluminum ore mud, 15-25 parts of alkaline activator, 0.2-0.5 parts of water reducer, 0.3-0.8 parts of early strength agent and 10-15 parts of water.

[0007] Furthermore, the weight ratio of the drilling cuttings, the coal gangue and the aluminum ore mud is 2:1:1.

[0008] Furthermore, the solid waste-based road material comprises the following components in parts by weight:

[0009] 48 parts of drilling cuttings, 24 parts of coal gangue, 24 parts of aluminum ore mud, 21 parts of alkaline activator, 0.3 parts of water reducer, 0.5 parts of early strength agent and 13 parts of water.

[0010] Further, the alkaline activator includes at least one of sodium hydroxide, potassium hydroxide, and potassium silicate; the water reducer includes at least one of amino sulfonate water reducers and polycarboxylate water reducers; the early strength agent is composed of calcium nitrate and sodium sulfate with a weight ratio of (1-3):(1-2).

[0011] Further, the construction and curing temperature of the solid waste-based road material is -25°C.

[0012] In a second aspect, the present invention provides a preparation method for the solid waste-based road material according to any one of the first aspect, and the preparation method includes the following steps:

[0013] Stir and mix drilling cuttings, coal gangue, and bauxite sludge to obtain a first mixture;

[0014] Subject the first mixture to magnetic field heat treatment, and then perform crushing and screening to obtain a second mixture;

[0015] Stir and mix the second mixture with the remaining components in the solid waste-based road material to obtain the solid waste-based road material.

[0016] Further, the magnetic field heat treatment step includes the following process:

[0017] Place the first mixture in a magnetic field sintering furnace, first perform heat preservation treatment for 0.5-1 hour under the conditions of a magnetic flux coil current of 3-7 A and a temperature of 300-400°C, then perform heat preservation treatment for 1-2 hours under the conditions of 15-20 A and a temperature of 700-800°C, and finally cool with the furnace.

[0018] Further, in terms of weight percentage, the particle size distribution of the second mixture is as follows: the proportion of particles with a particle size <0.075 mm is 4-8%, the proportion of particles with a particle size of 0.075 mm-1.25 mm is 10-15%, the proportion of particles with a particle size of 1.5 mm-2.5 mm is 65-75%, and the remaining particle size of the second mixture is 2.5 mm-5.0 mm.

[0019] In a third aspect, the present invention provides an application of the solid waste-based road material according to any one of the first aspect and the second aspect in repairing road surfaces in cold regions.

[0020] The above technical solutions provided by the embodiments of the present invention have at least the following advantages compared with the prior art:

[0021] An embodiment of the present invention provides a preparation method of solid waste-based road materials. The present invention uses appropriate proportions of drilling cuttings, coal gangue, and bauxite sludge as the solid waste-based material system, supplemented with reasonable additives, and combines magnetic field heat treatment technology for medium and low temperature activation, significantly improving the low temperature hardening performance of the obtained solid waste-based road materials, reducing the restriction of environmental temperature on the construction of concrete pavements. Especially in extremely cold regions, such as when dealing with a low temperature environment of -25°C, rapid and efficient pavement repair can be achieved, meeting the performance requirements of road materials in cold regions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments in accordance with the present invention, and are used together with the specification to explain the principles of the present invention.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic flow chart of a preparation method of solid waste-based road materials provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0026] Unless otherwise specifically stated, various raw materials, reagents, instruments, and equipment used in the present invention can be obtained through market purchases or prepared by existing methods.

[0027] In a first aspect, the present invention provides a solid waste-based road material. Calculated by weight parts, the solid waste-based road material includes the following components:

[0028] 40 - 55 parts of drilling cuttings, 20 - 30 parts of coal gangue, 20 - 30 parts of bauxite sludge, 15 - 25 parts of alkaline activator, 0.2 - 0.5 parts of water reducing agent, 0.3 - 0.8 parts of early strength agent, and 10 - 15 parts of water.

[0029] An embodiment of the present invention provides a solid waste-based road material. The present invention uses appropriate proportions of drilling cuttings, coal gangue, and bauxite slime as the solid waste-based material system, supplemented with reasonable additives, and combines magnetic field heat treatment technology for medium and low temperature activation, significantly improving the low-temperature hardening performance of the obtained solid waste-based road material, reducing the restriction of environmental temperature on the construction of concrete roads. Especially in extremely cold regions, such as when dealing with a low-temperature environment of -25°C, rapid and efficient road repair can be achieved, meeting the usage requirements of road material performance in cold regions.

[0030] In the present invention, the drilling cuttings are water-based drilling cuttings after solidification treatment of the drilling waste generated by using water as the continuous phase to prepare drilling mud for oil extraction, and its waste code in the "Solid Waste Classification and Code Directory" is 071-001-S12. In some specific embodiments, by weight percentage, the main oxides in the water-based drilling cuttings used include: the SiO2 content is 41.6-50.2%, the Al2O3 content is 7.0-9.3%, and the Fe2O3 content is 3.9-5.7%.

[0031] In the present invention, the bauxite slime, also known as bauxite washing slime, is the slime generated during the bauxite washing process, and its waste code in the "Solid Waste Classification and Code Directory" is 091-007-S05. In some specific embodiments, by weight percentage, the main oxides in the bauxite slime used include: the SiO2 content is 23.4-26.8 wt%, and the Al2O3 content is 40.1-45.7 wt%.

[0032] In the present invention, the coal gangue is the black-gray rock solid waste discharged during the production processes such as coal mine development, coal mining, and coal washing, and its waste code in the "Solid Waste Classification and Code Directory" is 060-001-S04. In some specific embodiments, by weight percentage, the main oxides in the coal gangue used include: the SiO2 content is 58.3-62.0%, the Al2O3 content is 21.7-25.9%, and the Fe2O3 content is 4.1-5.5%.

[0033] In some specific embodiments, the weight ratio of the drilling cuttings, the coal gangue, and the bauxite slime is 2:1:1.

[0034] In some specific embodiments, by weight parts, the solid waste-based road material includes the following components:

[0035] 48 parts of drilling cuttings, 24 parts of coal gangue, 24 parts of bauxite slime, 21 parts of alkaline activator, 0.3 parts of water reducer, 0.5 parts of early strength agent, and 13 parts of water.

[0036] In some specific embodiments, the alkaline activator includes at least one of sodium hydroxide, potassium hydroxide, and potassium silicate. Preferably, it is potassium hydroxide with a weight ratio of 1:1 and potassium silicate with a modulus of 2.6 - 3.0. The potassium silicate can be prepared by oneself according to the preparation process disclosed in the prior art or directly use commercially available potassium silicate such as the product models ZFK27 - 49A and ZFK29 - 44A from Foshan Zhongfa Water Glass Factory; the water reducer includes at least one of sulfamate-based water reducers and polycarboxylate-based water reducers. Preferably, it is a polycarboxylate-based water reducer. Specifically, commercially available polycarboxylate-based water reducers from companies such as Jinan Quanchi New Materials Co., Ltd. and Shandong Hongquan Chemical Technology Co., Ltd. can be used; the early strength agent is composed of calcium nitrate and sodium sulfate with a weight ratio of (1 - 3):(1 - 2).

[0037] In some specific embodiments, the construction and curing temperature of the solid waste-based road material is -25°C.

[0038] In a second aspect, based on the same inventive concept, the present invention provides a preparation method of the solid waste-based road material according to any one of the first aspect, as Figure 1 shown, the preparation method includes the following steps:

[0039] Stir and mix drilling cuttings, coal gangue, and bauxite sludge to obtain a first mixture;

[0040] Perform magnetic field heat treatment on the first mixture, and then perform crushing and screening to obtain a second mixture;

[0041] Stir and mix the second mixture and the remaining components in the solid waste-based road material to obtain the solid waste-based road material.

[0042] Compared with traditional high-temperature sintering activation (temperature > 1000°C), the present invention uses magnetic field heat treatment technology to perform medium and low-temperature activation on the solid waste-based material, with better activation effect and lower energy consumption.

[0043] In some specific embodiments, the magnetic field heat treatment step includes the following process:

[0044] Place the first mixture in a magnetic field sintering furnace, first perform heat preservation treatment for 0.5 - 1 hour under the conditions of a magnetic flux coil current of 3 - 7 A and a temperature of 300 - 400°C, then perform heat preservation treatment for 1 - 2 hours under the conditions of 15 - 20 A and a temperature of 700 - 800°C, and finally cool with the furnace.

[0045] In some specific embodiments, by weight percentage, the particle size distribution of the second mixture is as follows: the proportion of particles with a particle size < 0.075 mm is 4 - 8%, the proportion of particles with a particle size of 0.075 mm - 1.25 mm is 10 - 15%, the proportion of particles with a particle size of 1.5 mm - 2.5 mm is 65 - 75%, and the remaining particle size of the second mixture is 2.5 mm - 5.0 mm.

[0046] In a third aspect, based on the same inventive concept, the present invention provides an application of the solid waste-based road material according to any one of the first and second aspects in repairing road surfaces in cold regions.

[0047] It should be noted that for the component raw materials involved in the solid waste-based road material and its preparation method provided in the embodiments of the present invention, without special limitations or instructions, each component can directly adopt commercially available products. At the same time, for the steps involved in this preparation method, without special limitations or instructions, they can all be carried out according to the steps and parameters disclosed in the prior art or using existing equipment, and the present invention document will not elaborate one by one.

[0048] The following further elaborates the present invention in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. The experimental methods without specific conditions noted in the following embodiments are usually determined according to national standards. If there is no corresponding national standard, they are carried out according to general international standards, conventional conditions, or the conditions recommended by the manufacturer.

[0049] Example 1

[0050] This example provides a solid waste-based road material, which, by weight parts, includes the following components:

[0051] 48 parts of drilling cuttings, 24 parts of coal gangue, 24 parts of bauxite sludge, 21 parts of alkaline activator, 0.3 parts of water reducer, 0.5 parts of early strength agent, and 13 parts of water;

[0052] The alkaline activator is composed of potassium hydroxide and potassium water glass with a modulus of 2.6 - 2.8 in a weight ratio of 1:1;

[0053] The water reducer is a polycarboxylate water reducer;

[0054] The early strength agent is composed of calcium nitrate and sodium sulfate in a weight ratio of 2:1.5.

[0055] The preparation method of the above solid waste-based road material includes the following steps:

[0056] Step (1): Stir and mix the drilling cuttings, coal gangue, and bauxite sludge to obtain a first mixture;

[0057] Step (2): Place the first mixture obtained in step (1) in a magnetic field sintering furnace for magnetic heat treatment. First, carry out heat preservation treatment for 1 hour under the conditions of a magnetic flux coil current of 5 A and a temperature of 360 °C, then carry out heat preservation treatment for 1.5 hours under the conditions of 18 A and a temperature of 740 °C, and finally cool with the furnace; Crush and screen the first mixture after magnetic heat treatment to obtain a second mixture; Among them, in terms of weight percentage, the particle size distribution of the second mixture is as follows: the proportion of particles with a particle size < 0.075 mm is 5%, the proportion of particles with a particle size of 0.075 mm - 1.25 mm is 12%, the proportion of particles with a particle size of 1.5 mm - 2.5 mm is 70%, and the proportion of particles with a particle size of 2.5 mm - 5.0 mm is 13%;

[0058] Stir and mix the second mixture and the remaining components of the solid waste-based road material to obtain the solid waste-based road material.

[0059] The solid waste-based road material in this example is cured at -25 °C and then subjected to mechanical property tests. The test results are shown in Table 1.

[0060] Example 2

[0061] This example provides a solid waste-based road material. In terms of weight parts, the solid waste-based road material includes the following components:

[0062] 40 parts of drilling cuttings, 30 parts of coal gangue, 30 parts of bauxite mud, 15 parts of alkaline activator, 0.2 parts of water reducing agent, 0.3 parts of early strength agent, and 10 parts of water;

[0063] The alkaline activator is composed of potassium hydroxide and potassium water glass with a modulus of 2.6 - 2.8 in a weight ratio of 1:1;

[0064] The water reducing agent is a polycarboxylate water reducing agent;

[0065] The early strength agent is composed of calcium nitrate and sodium sulfate in a weight ratio of 1:2.

[0066] The preparation method of the above solid waste-based road material includes the following steps:

[0067] Step (1): Stir and mix the drilling cuttings, coal gangue, and bauxite mud to obtain a first mixture;

[0068] Step (2): The first mixture obtained in step (1) is placed in a magnetic field sintering furnace for magnetic heat treatment. First, it is heat-insulated for 0.5 hours under the conditions of a magnetic flux coil current of 3 A and a temperature of 400 °C, then heat-insulated for 2 hours under the conditions of 20 A and a temperature of 700 °C, and finally cooled with the furnace. The first mixture after magnetic heat treatment is crushed and screened to obtain a second mixture. Among them, in terms of weight percentage, the particle size distribution of the second mixture is as follows: the proportion of particles with a particle size < 0.075 mm is 8%, the proportion of particles with a particle size of 0.075 mm - 1.25 mm is 15%, the proportion of particles with a particle size of 1.5 mm - 2.5 mm is 65%, and the proportion of particles with a particle size of 2.5 mm - 5.0 mm is 12%.

[0069] The second mixture and the remaining components of the solid waste-based road material are stirred and mixed to obtain the solid waste-based road material.

[0070] The solid waste-based road material in this example is cured at -25 °C and then subjected to mechanical property tests. The test results are shown in Table 1.

[0071] Example 3

[0072] This example provides a solid waste-based road material. In terms of parts by weight, the solid waste-based road material includes the following components:

[0073] 55 parts of drilling cuttings, 20 parts of coal gangue, 20 parts of bauxite mud, 25 parts of alkaline activator, 0.5 part of water reducing agent, 0.8 part of early strength agent, and 15 parts of water;

[0074] The alkaline activator is composed of potassium hydroxide and potassium water glass with a modulus of 2.6 - 2.8 in a weight ratio of 1:1;

[0075] The water reducing agent is a polycarboxylate water reducing agent;

[0076] The early strength agent is composed of calcium nitrate and sodium sulfate in a weight ratio of 3:1.

[0077] The preparation method of the above solid waste-based road material includes the following steps:

[0078] Step (1): Stir and mix the drilling cuttings, coal gangue, and bauxite mud to obtain a first mixture;

[0079] Step (2): Place the first mixture obtained in step (1) in a magnetic field sintering furnace for magnetic field heat treatment. First, carry out heat preservation treatment for 1 hour under the conditions of a magnetic flux coil current of 7 A and a temperature of 300 °C, then carry out heat preservation treatment for 2 hours under the conditions of 15 A and a temperature of 800 °C, and finally cool with the furnace; Crush and screen the first mixture after magnetic field heat treatment to obtain a second mixture; Among them, in terms of weight percentage, the particle size gradation of the second mixture is: the proportion with a particle size < 0.075 mm is 4%, the proportion with a particle size of 0.075 mm - 1.25 mm is 10%, the proportion with a particle size of 1.5 mm - 2.5 mm is 75%, and the proportion with a particle size of 2.5 mm - 5.0 mm is 11%;

[0080] Stir and mix the second mixture and the remaining components of the solid waste-based road material to obtain the solid waste-based road material.

[0081] The solid waste-based road material in this example is cured at -25 °C and then subjected to mechanical property tests. The test results are shown in Table 1.

[0082] Comparative Example 1

[0083] This example provides a solid waste-based road material and its preparation method. The difference from Example 1 is only that: the dosage of drilling cuttings is adjusted to 24 parts, and the dosage of bauxite sludge is adjusted to 48 parts; The remaining steps and parameters are the same.

[0084] This example provides a solid waste-based road material. In terms of weight parts, the solid waste-based road material includes the following components:

[0085] 24 parts of drilling cuttings, 24 parts of coal gangue, 48 parts of bauxite sludge, 21 parts of alkaline activator, 0.3 parts of water reducer, 0.5 parts of early strength agent, and 13 parts of water;

[0086] The alkaline activator is composed of potassium hydroxide with a weight ratio of 1:1 and potassium water glass with a modulus of 2.6 - 2.8;

[0087] The water reducer is a polycarboxylate water reducer;

[0088] The early strength agent is composed of calcium nitrate and sodium sulfate with a weight ratio of 2:1.5.

[0089] The preparation method of the above solid waste-based road material includes the following steps:

[0090] Step (1): Stir and mix drilling cuttings, coal gangue, and bauxite sludge to obtain a first mixture;

[0091] Step (2): Place the first mixture obtained in step (1) in a magnetic field sintering furnace for magnetic field heat treatment. First, carry out heat preservation treatment for 1 hour under the conditions of a magnetic flux coil current of 5 A and a temperature of 360 °C, then carry out heat preservation treatment for 1.5 hours under the conditions of 18 A and a temperature of 740 °C, and finally cool with the furnace; Crush and screen the first mixture after magnetic field heat treatment to obtain a second mixture; Among them, in terms of weight percentage, the particle size grading of the second mixture is as follows: the proportion of particles with a particle size < 0.075 mm is 5%, the proportion of particles with a particle size of 0.075 mm - 1.25 mm is 12%, the proportion of particles with a particle size of 1.5 mm - 2.5 mm is 70%, and the proportion of particles with a particle size of 2.5 mm - 5.0 mm is 13%;

[0092] Stir and mix the second mixture and the remaining components of the solid waste-based road material to obtain the solid waste-based road material.

[0093] In this example, the solid waste-based road material is cured at -25 °C and then subjected to mechanical property tests. The test results are shown in Table 1.

[0094] Comparative Example 2

[0095] This example provides a solid waste-based road material and its preparation method, which is only different from Example 1 in that: the magnetic field heat treatment in step (2) is adjusted to conventional heat treatment; the remaining steps and parameters are the same.

[0096] This example provides a solid waste-based road material, which, in terms of weight parts, comprises the following components:

[0097] 48 parts of drilling cuttings, 24 parts of coal gangue, 24 parts of bauxite mud, 21 parts of alkaline activator, 0.3 part of water reducing agent, 0.5 part of early strength agent and 13 parts of water;

[0098] The alkaline activator is composed of potassium hydroxide and potassium water glass with a modulus of 2.6 - 2.8 in a weight ratio of 1:1;

[0099] The water reducing agent is a polycarboxylate water reducing agent;

[0100] The early strength agent is composed of calcium nitrate and sodium sulfate in a weight ratio of 2:1.5.

[0101] The preparation method of the above solid waste-based road material comprises the following steps:

[0102] Step (1): Stir and mix the drilling cuttings, coal gangue and bauxite mud to obtain a first mixture;

[0103] Step (2): Place the first mixture obtained in step (1) in a sintering furnace for heat treatment. First, carry out heat preservation treatment for 1 hour at a temperature of 360 °C, then carry out heat preservation treatment for 1.5 hours at a temperature of 740 °C, and finally cool it with the furnace. Crush and screen the heat-treated first mixture to obtain a second mixture. Among them, in terms of weight percentage, the particle size gradation of the second mixture is as follows: the proportion of particles with a particle size < 0.075 mm is 5%, the proportion of particles with a particle size of 0.075 mm - 1.25 mm is 12%, the proportion of particles with a particle size of 1.5 mm - 2.5 mm is 70%, and the proportion of particles with a particle size of 2.5 mm - 5.0 mm is 13%.

[0104] Stir and mix the second mixture and the remaining components of the solid waste-based road material to obtain the solid waste-based road material.

[0105] In this example, the solid waste-based road material is cured at -25 °C, and then mechanical property tests are carried out. The test results are shown in Table 1.

[0106] Table 1

[0107]

[0108]

[0109] As can be seen from Table 1, compared with the comparative example, under the low-temperature construction and curing conditions of -25 °C, the solid waste-based road material provided by the embodiment of the present invention has higher early strength, has the characteristics of rapid hardening and early strength, and can meet the use requirements of road surface materials in cold regions.

[0110] In summary, the embodiment of the present invention provides a solid waste-based road material, its preparation method and application. The present invention uses appropriate proportions of drilling cuttings, coal gangue and bauxite sludge as the solid waste-based material system, supplemented with reasonable additives, and at the same time combines magnetic field heat treatment technology for medium and low-temperature activation, significantly improving the low-temperature hardening performance of the obtained solid waste-based road material, reducing the restriction of environmental temperature on the construction of concrete road surfaces. Especially in extremely cold regions, such as when dealing with a low-temperature environment of -25 °C, it can achieve rapid and efficient repair of road surfaces, meeting the use requirements of road surface materials in cold regions.

[0111] Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity and should not be construed as a rigid limitation on the scope of the present invention; therefore, it should be considered that the described range description has specifically disclosed all possible sub-ranges and individual values within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and individual numbers within the range, such as 1, 2, 3, 4, 5, and 6, and this applies regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any recited number (fraction or integer) within the indicated range.

[0112] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A solid waste-based road material, characterized in that, The solid waste-based road material includes the following components by weight parts: 40 - 55 parts of drilling cuttings, 20 - 30 parts of coal gangue, 20 - 30 parts of bauxite sludge, 15 - 25 parts of alkaline activator, 0.2 - 0.5 part of water reducer, 0.3 - 0.8 part of early strength agent, and 10 - 15 parts of water; The preparation method of the solid waste-based road material includes the following steps: Stir and mix the drilling cuttings, coal gangue and bauxite sludge to obtain a first mixture; Perform magnetic field heat treatment on the first mixture, and then perform crushing and screening to obtain a second mixture; Stir and mix the second mixture and the remaining components in the solid waste-based road material to obtain the solid waste-based road material.

2. The solid waste-based road material according to claim 1, characterized in that The weight ratio of the drilling cuttings, the coal gangue and the bauxite sludge is 2:1:

1.

3. The solid waste-based road material according to claim 1, wherein The solid waste-based road material includes the following components by weight parts: 48 parts of drilling cuttings, 24 parts of coal gangue, 24 parts of bauxite sludge, 21 parts of alkaline activator, 0.3 part of water reducer, 0.5 part of early strength agent, and 13 parts of water.

4. The solid waste-based road material according to any one of claims 1 to 3, characterized in that The alkaline activator includes at least one of sodium hydroxide, potassium hydroxide and potassium water glass; the water reducer includes at least one of amino sulfonate-based water reducer and polycarboxylate-based water reducer; the early strength agent is composed of calcium nitrate and sodium sulfate with a weight ratio of (1 - 3):(1 - 2).

5. The solid waste-based road material according to any one of claims 1 to 3, characterized in that, The construction and curing temperature of the solid waste-based road material is -25°C.

6. The solid waste-based road material according to claim 1, characterized in that The magnetic field heat treatment step includes the following process: Place the first mixture in a magnetic field sintering furnace, first perform heat preservation treatment for 0.5 - 1 hour under the conditions of a magnetic flux coil current of 3 - 7 A and a temperature of 300 - 400°C, then perform heat preservation treatment for 1 - 2 hours under the conditions of 15 - 20 A and a temperature of 700 - 800°C, and finally cool with the furnace.

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