Construction method of mine heavy load road based on solid oil toughening oil shale waste residue

Abstract

This invention belongs to the field of road engineering and industrial solid waste resource utilization technology, and particularly relates to a construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste residue. The method involves constructing, from bottom to top, an existing layer treatment layer, a first bonding layer, a high-toughness surface layer, a second bonding layer, and a solid-oil toughened oil shale waste residue overlay layer on the existing road layer in the mining area. After crushing, screening, and drying, the oil shale waste residue undergoes surface modification using a silane coupling agent hydrolysate, and is then mixed with toughening oil components and dried to obtain solid-oil toughened oil shale waste residue. This overlay layer is then mixed with aggregates, fillers, and cementing materials, and spread and compacted to form the overlay layer. The existing layer treatment layer improves the base condition through defect repair and interface treatment. The two bonding layers enhance interlayer bonding, and the high-toughness surface layer improves structural toughness and stress dispersion capacity. This method significantly improves the load-bearing capacity, rutting resistance, fatigue cracking resistance, and interlayer stability of heavy-duty roads in mining areas, achieving efficient resource utilization of oil shale waste residue.

Description

Technical Field

[0001] This invention belongs to the field of road engineering and industrial solid waste resource utilization technology, and particularly relates to a construction method for heavy-duty roads in mining areas based on oil shale waste residue with solid oil toughening. Background Technology

[0002] Heavy-duty roads in mining areas are subjected to harsh working conditions such as repeated crushing by heavy vehicles and impact from high-volume loads, which can easily lead to serious structural defects such as rutting, cracking, and loosening.

[0003] Traditional asphalt overlay materials are insufficient in terms of rutting resistance, interlayer bonding ability, fatigue resistance and water resistance, making it difficult to meet the long-term service requirements of roads in mining areas.

[0004] Meanwhile, as industrial solid waste, oil shale residue not only occupies land but also poses a risk of environmental pollution when stored.

[0005] If unmodified oil shale waste is directly applied to road engineering, it will have defects such as low particle surface activity, poor interfacial compatibility, weak bonding with cementing materials, and insufficient structural strength and toughness, making it unsuitable for the use of heavy-duty roads in mining areas.

[0006] Therefore, achieving high-value and high-stability utilization of oil shale waste while solving the problem of road damage in mining areas has become a pressing technical challenge for the industry. Summary of the Invention

[0007] The purpose of this invention is to provide a construction method for heavy-duty roads in mining areas based on solidified and toughened oil shale waste, in order to solve the above-mentioned problems.

[0008] To achieve the above objectives, the present invention provides the following solution: The construction method for heavy-duty roads in mining areas based on oil shale waste with solidified toughening includes the following steps: On the existing layer of the mining area road, the existing layer treatment layer, the first bonding layer, the high toughness surface layer, the second bonding layer, and the oil-reinforcing and toughening oil shale waste residue overlay layer are laid in the order from bottom to top. The oil-reinforced toughened oil shale waste residue overlay layer is formed by mixing oil-reinforced toughened oil shale waste residue, aggregates, fillers and cementing materials, and then spreading and compacting them. The preparation of the solidified and toughened oil shale waste residue includes: The first material is obtained by crushing, screening and drying oil shale waste residue; The second material is obtained by surface treatment of the first material using a silane coupling agent hydrolysate. The third material is obtained by mixing the second material with the toughening oil component; The third material is dried to obtain the solidified and toughened oil shale waste residue; The toughening oil component is one or more of heavy oil, recycled oil, coal tar modified component, waste engine oil recycled component, petroleum resin modified oil, or modified asphalt. The silane coupling agent hydrolysate is prepared from silane coupling agent, anhydrous ethanol and water.

[0009] The thickness of the high-toughness surface layer is 20–60 mm.

[0010] The high-toughness surface layer is used to absorb and disperse the tensile and shear stresses generated by heavy vehicle loads in the mining area, and the oil-reinforced toughened oil shale waste residue overlay layer is used to improve the load-bearing capacity, rutting resistance and fatigue cracking resistance of the overlay structure.

[0011] The solidified and toughened oil shale waste residue accounts for 15% to 45% of the total mass of the overlay mineral material, the cementing material accounts for 3.0% to 8.0% of the total mass of the mineral material, and the particle size of the solidified and toughened oil shale waste residue is 0 to 31.5 mm.

[0012] The toughening oil component is added at a rate of 1% to 12% of the mass of oil shale waste.

[0013] Optionally, the thickness of the solidified and toughened oil shale waste residue overlay layer is 40–150 mm.

[0014] Optionally, the interface agent is composed of anhydrous ethanol, a silane coupling agent, and water.

[0015] The mass ratio of anhydrous ethanol, silane coupling agent and water is (5-20): (10-30): (50-85).

[0016] Optionally, the first adhesive layer is one of modified emulsified asphalt, SBS modified asphalt, rubber modified asphalt, or epoxy modified asphalt, and the application rate of the first adhesive layer is 0.3 to 1.2 kg / m².

[0017] Optionally, the second adhesive layer is formed using a high-penetration, high-adhesion interlayer adhesive material, which is one of SBS modified emulsified asphalt, rubber asphalt, epoxy asphalt, or composite resin interface material, and the application rate of the second adhesive layer is 0.4 to 1.5 kg / m².

[0018] Optionally, the paving temperature of the high-toughness surface layer is 140–185°C, and the final compaction temperature is not lower than 90°C.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects: This construction method effectively improves the surface activity and interfacial compatibility of oil shale waste particles by surface treatment with silane coupling agents and fixation modification of toughening oil components. This enhances the bonding strength between the waste and cementing materials, allowing for a high proportion of oil shale waste to be used in heavy-duty road overlay structures in mining areas. A layered structure is employed, sequentially constructing an existing layer treatment layer, a first bonding layer, a high-toughness surface layer, a second bonding layer, and a solidified and toughened oil shale waste overlay layer. Combined with interface agent reinforcement and a double bonding layer design, this significantly improves interlayer bonding performance, structural integrity, and water resistance. The high-toughness surface layer effectively absorbs and disperses stress generated by heavy-duty vehicles, reducing the risk of cracking. The solidified and toughened oil shale waste overlay layer significantly improves road load-bearing capacity, rutting resistance, and fatigue crack resistance, extending road service life. Simultaneously, it achieves high-value utilization of oil shale waste resources, reduces solid waste accumulation and environmental impact, and the construction process is controllable, making it suitable for heavy-duty road overlay and reconstruction projects in mining areas. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the step-by-step construction structure of the present invention; Figure 3 This is a flowchart illustrating the construction process of this invention. The structure consists of: 1. Existing layer treatment layer; 2. First bonding layer; 3. High-toughness surface layer; 4. Second bonding layer; 5. Oil-reinforced and toughened oil shale waste residue overlay layer. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figures 1 to 3 This invention discloses a construction method for heavy-duty roads in mining areas based on solidified and toughened oil shale waste, comprising the following steps: On the existing layer of the mining area road, the following layers are laid in order from bottom to top: Existing layer treatment layer 1, first bonding layer 2, high toughness surface layer 3, second bonding layer 4, and oil-solidifying and toughening oil shale waste residue overlay layer 5.

[0024] Among them, the solidified and toughened oil shale waste residue overlay layer 5 is formed by mixing solidified and toughened oil shale waste residue, aggregates, fillers and cementing materials and then spreading and compacting them.

[0025] The preparation of solidified and toughened oil shale waste includes: The first material is obtained by crushing, screening and drying oil shale waste residue.

[0026] The second material is obtained by surface treatment of the first material using a silane coupling agent hydrolysate.

[0027] The third material is obtained by mixing the second material with the toughening oil component.

[0028] The third material was dried to obtain solidified and toughened oil shale waste residue.

[0029] The toughening oil component is one or more of the following: heavy oil, recycled oil, coal tar modified component, waste engine oil recycled component, petroleum resin modified oil, or modified asphalt.

[0030] The silane coupling agent hydrolysate is prepared from silane coupling agent, anhydrous ethanol and water.

[0031] The high-toughness surface layer 3 has a thickness of 20–60 mm.

[0032] Among them, the high-toughness surface layer 3 is used to absorb and disperse the tensile and shear stresses generated by the heavy vehicle load in the mining area, and the oil-solidifying and toughening oil shale waste residue overlay layer 5 is used to improve the load-bearing capacity, rutting resistance and fatigue cracking resistance of the overlay structure.

[0033] Among them, the solidified and toughened oil shale waste residue accounts for 15% to 45% of the total mass of the overlay mineral materials, the cementing material accounts for 3.0% to 8.0% of the total mass of the mineral materials, and the particle size of the solidified and toughened oil shale waste residue is 0 to 31.5 mm.

[0034] The toughening oil component is added at a rate of 1% to 12% of the mass of oil shale waste.

[0035] The layers are laid in the following order from bottom to top: existing treatment layer 1, first bonding layer 2, high-toughness surface layer 3, second bonding layer 4, and oil-reinforced toughened oil shale waste residue overlay layer 5. The oil-reinforced toughened oil shale waste residue overlay layer 5 is formed by mixing, spreading, and compacting oil-reinforced toughened oil shale waste residue, aggregates, fillers, and cementing materials. The oil-reinforced toughened oil shale waste residue is crushed, screened, and dried to obtain the first material. This first material is then surface-treated with a silane coupling agent hydrolysate to obtain the second material. This second material is then mixed with toughening oil components such as heavy oil and recycled oil to obtain the third material, which is then dried. The silane coupling agent hydrolysate is prepared from silane coupling agent, anhydrous ethanol, and water. This method enables high-value utilization of oil shale waste residue, improves the load-bearing and durability performance of the overlay layer, and is suitable for the heavy-duty road requirements in mining areas.

[0036] As an optional implementation, the silane coupling agent is one or more of epoxy silane, amino silane, vinyl silane, or methacryloxy silane.

[0037] The pH value of the silane coupling agent hydrolysate is 4-7, and the hydrolysis time is 12-72 h.

[0038] The hydrolysate of the silane coupling agent is mixed with the first material by spraying or mechanical mixing, and then dried or aged at 40–120°C for 0.5–24 hours.

[0039] The mass ratio of silane coupling agent, anhydrous ethanol and water is 5-20:10-30:50-85.

[0040] The silane coupling agent is one or more of glycidyl ether oxypropyltrimethoxysilane, KH550, KH560, and KH570.

[0041] By precisely controlling the hydrolysis and treatment parameters, the surface activity and interfacial compatibility of oil shale waste particles are improved, thereby enhancing the bonding ability between the waste and the cementing materials.

[0042] As an optional implementation method, the thickness of the solidified and toughened oil shale waste overlay layer 5 is 40-150 mm.

[0043] A reasonable thickness setting can ensure the load-bearing capacity, rutting resistance and fatigue cracking resistance of the overlay layer, and meet the stress requirements of heavy-duty road structures in mining areas.

[0044] As an optional implementation, the existing layer treatment layer 1 is used for surface repair of the existing layer of the mining area road, including filling or sealing cracks in the existing layer of the mining area road, and milling repair of potholes, loose areas, bulges and network cracks in the existing layer of the mining area road.

[0045] After the existing layer treatment layer 1 is laid, it is cleaned, dusted, and leveled, and then an interface agent is sprayed.

[0046] The existing layer treatment layer 1 is used to fill or seal cracks in the existing layer, and to mill and repair potholes, loose surfaces, and other defects. After construction, the surface is cleaned, leveled, and an interface agent is sprayed, which can eliminate existing pavement defects and improve the bonding stability between the base layer and the superstructure.

[0047] As an optional implementation, the interface agent consists of anhydrous ethanol, a silane coupling agent, and water.

[0048] The mass ratio of anhydrous ethanol:silane coupling agent:water is 20-25:50-55:20-30.

[0049] This interface agent can enhance the surface interface properties of the existing layer treatment layer 1 and improve the interlayer adhesion with the first adhesive layer 2.

[0050] As an optional implementation, the surface texture depth of the existing layer treatment layer 1 is 0.4 to 1.5 mm, and the compaction degree of the existing layer treatment layer 1 is not less than 96%.

[0051] By controlling the surface texture and compaction parameters, the strength of the base structure and the reliability of interlayer bonding are ensured.

[0052] As an optional implementation, the first adhesive layer 2 is one of modified emulsified asphalt, SBS modified asphalt, rubber modified asphalt, or epoxy modified asphalt, and the application rate of the first adhesive layer 2 is 0.3 to 1.2 kg / m².

[0053] By selecting high-adhesion materials and controlling the amount of spraying, the interlayer connection between the existing layer treatment layer 1 and the high-toughness surface layer 3 is strengthened.

[0054] As an optional implementation, the high-toughness surface layer 3 is formed by mixing high-toughness binder and mineral aggregate. The high-toughness binder includes base asphalt and toughening modification components. The toughening modification components are one or more of rubber powder, SBS, polyester fiber, basalt fiber, lignin fiber and resin toughening agent.

[0055] Among them, the amount of high-toughness binder accounts for 4.5% to 8.0% of the total mass of the mineral.

[0056] In high-toughness binders, the fiber content accounts for 0.1% to 0.8% of the total mass of the mixture.

[0057] The dynamic stability of the high-toughness surface layer 3 is not less than 6000 cycles / mm, and the low-temperature bending strain is not less than 2500με.

[0058] The high-toughness surface layer 3 is composed of high-toughness binder and mineral aggregate. The high-toughness binder contains base asphalt, rubber powder, SBS and other toughening and modifying components, which can improve the toughness of the surface layer and effectively absorb and disperse the tensile and shear stress generated by the load.

[0059] As an optional implementation, the second adhesive layer 4 is formed using a high-penetration, high-adhesion interlayer bonding material, which is one of SBS modified emulsified asphalt, rubber asphalt, epoxy asphalt, or composite resin interface material. The application rate of the second adhesive layer 4 is 0.4 to 1.5 kg / m².

[0060] The material and amount of the second bonding layer 4 are set to ensure a firm bond between the high-toughness surface layer 3 and the oil-reinforced and toughened oil shale waste overlay layer 5, and to prevent interlayer slippage and detachment.

[0061] As an optional implementation, the paving temperature of the high-toughness surface layer 3 is 140-185℃, and the final compaction temperature is not lower than 90℃.

[0062] By strictly controlling the paving and compaction temperatures, the compaction quality and structural performance of the high-toughness surface layer 3 are guaranteed.

[0063] Specifically, the present invention is installed on the existing layer of the mining area road, and from bottom to top includes an existing layer treatment layer 1, a first bonding layer 2, a high-toughness surface layer 3, a second bonding layer 4, and an oil-solidifying and toughening oil shale waste residue overlay layer 5.

[0064] Existing layer treatment layer 1 is formed by treating, leveling, and strengthening the interface of the existing layer. Cracks are filled or sealed, and pits, loose areas, bulges, and network cracks are milled and repaired. After cleaning and leveling, an interface agent is sprayed. The interface agent is composed of anhydrous ethanol, silane coupling agent, and water in a mass ratio of (20-25):(50-55):(20-30). The surface texture depth of the treatment layer is 0.4-1.5 mm, and the compaction degree is not less than 96%.

[0065] The first bonding layer 2 is made of one of the following: modified emulsified asphalt, SBS modified asphalt, rubber modified asphalt, or epoxy modified asphalt, with a spraying rate of 0.3 to 1.2 kg / m².

[0066] The high-toughness surface layer 3, with a thickness of 20–60 mm, is composed of a high-toughness binder and aggregate. The high-toughness binder includes base asphalt and toughening modifiers, which are one or more of the following: rubber powder, SBS, polyester fiber, basalt fiber, lignin fiber, and resin-based toughening agents. The binder content is 4.5%–8.0% of the total aggregate mass, and the fiber content is 0.1%–0.8% of the total mixture mass. The high-toughness surface layer 3 has a dynamic stability of not less than 6000 cycles / mm and a low-temperature bending strain of not less than 2500 με, and is used to absorb and disperse tensile and shear stresses generated by loads.

[0067] The second bonding layer 4 uses SBS modified emulsified asphalt, rubber asphalt, epoxy asphalt, or composite resin interface material, with a spraying rate of 0.4 to 1.5 kg / m².

[0068] The oil-reinforced and toughened oil shale waste overlay layer 5, with a thickness of 40–150 mm, is composed of oil-reinforced and toughened oil shale waste, aggregates, fillers, and cementing materials, which are mixed, spread, and compacted. The oil-reinforced and toughened oil shale waste accounts for 15%–45% of the total mass of mineral materials, and the cementing materials account for 3.0%–8.0%. The waste particle size is 0–31.5 mm, and it is used to improve load-bearing capacity, rutting resistance, and fatigue cracking resistance.

[0069] The method for preparing toughened oil shale waste residue is as follows: After crushing, screening, and drying, the oil shale waste residue is surface-treated with a silane coupling agent hydrolysate, and then toughening oil components are applied. After stirring and drying, the toughening oil components are stably fixed on the particle surface. The silane coupling agent hydrolysate is prepared by mixing silane coupling agent, anhydrous ethanol, and water in a mass ratio of (5-20):(10-30):(50-85). The silane coupling agent is selected from epoxy silane, amino silane, vinyl silane, and methacryloxy silane. The pH value of the hydrolysate is 4-7, the hydrolysis time is 12-72 h, and after treatment, it is dried at 40-120℃ for 0.5-24 h. The toughening oil components are one or more of heavy oil, recycled oil, coal tar modified components, waste engine oil recycled components, petroleum resin modified oil, or modified asphalt, and the dosage is 1%-12% of the mass of the oil shale waste residue.

[0070] The construction steps of this invention include: The existing layer is inspected and the defects are treated to form the existing layer treatment layer 1.

[0071] Among them, when the crack width on the existing layer of the road in the mining area is less than 5mm, crack filling is used; when it is not less than 5mm, grooved crack filling is used.

[0072] Spray the first adhesive layer 2 onto the existing layer treatment layer 1, and proceed to the next step after demulsification or surface drying.

[0073] The high-toughness surface layer 3 is laid on the first bonding layer 2 at a paving temperature of 140-185℃, a final compaction temperature of not less than 90℃, and a compaction degree of not less than 98%.

[0074] Spray the second adhesive layer 4 onto the surface of the high-toughness surface layer 3, and proceed to the next step after demulsification or surface drying.

[0075] The oil shale waste residue overlay layer 5 is laid in one or multiple layers, with a single layer compacted to a thickness of 30-80mm and a compaction degree of not less than 98%.

[0076] Traffic will be allowed once the overlay reaches the designed strength or a stable state.

[0077] After construction is completed, the interlayer bonding condition is inspected by interlayer pull-out strength or interlayer shear strength.

[0078] This invention employs a multi-layer composite structure, combined with a double bonding layer and a high-toughness surface layer 3, significantly improving interlayer bonding strength, rutting resistance, water resistance, and fatigue cracking resistance. Oil shale waste residue undergoes dual modification with silane coupling agents and toughening oil components, resulting in significantly enhanced particle surface activity and interfacial compatibility. This leads to a strong bond with cementing materials, allowing for a high proportion of use in heavy-duty road overlay layers. This achieves resource utilization and high-value utilization of oil shale waste residue, reduces solid waste accumulation and environmental pollution, lowers project costs, and features mature and controllable construction technology. It is suitable for rapid overlay and reconstruction of heavy-duty roads in mining areas, demonstrating promising engineering application prospects.

[0079] Let's illustrate this with a specific application example: Firstly, the existing asphalt layer treatment layer 1 was constructed by detecting and treating defects in the existing asphalt layer of the mining area road: cracks less than 5mm wide were treated with crack filling, and cracks 5mm or wider were treated with grooved crack filling. Potholes, loose areas, bulges, and network cracks were milled and repaired. After repair, the road surface was swept, dusted, and leveled, and a bonding agent was sprayed. The bonding agent was prepared according to the mass ratio of anhydrous ethanol: silane coupling agent: water = 22:53:25. After treatment, the surface texture depth of the existing layer treatment layer 1 was 0.8mm, and the compaction degree was 97%.

[0080] Further construction of the first bonding layer 2 involves uniformly spraying SBS modified asphalt onto the surface of the existing treatment layer 1 at a rate of 0.6 kg / m². After the first bonding layer 2 has demulsified and surface dried, the upper layer construction will proceed.

[0081] Further construction of the high-toughness surface layer 3, with a thickness of 40mm, was carried out. This layer was composed of a mixture of base asphalt, SBS, basalt fiber, and aggregate. The binder content was 5.2% of the total aggregate mass, and the basalt fiber content was 0.3% of the total mixture mass. The paving temperature was 165℃, and the final compaction temperature was 95℃. After initial compaction, secondary compaction, and final compaction, the compaction degree was not less than 98%. The resulting high-toughness surface layer 3 exhibited a dynamic stability of 7200 cycles / mm and a low-temperature flexural strain of 3100με.

[0082] Further construction of the second bonding layer 4 involves spraying SBS modified emulsified asphalt onto the surface of the high-toughness surface layer 3 at a rate of 0.8 kg / m², followed by paving of the upper layer after the surface has dried.

[0083] Further construction of the oil shale waste residue solidification and toughening overlay layer 5: Preparation of the oil shale waste residue solidification and toughening layer: After crushing, screening, and drying, the oil shale waste residue is surface modified using a silane coupling agent hydrolysate. The silane coupling agent hydrolysate used is KH-560, with a mass ratio of KH-560: anhydrous ethanol: water = 12:20:68, a pH value of 5, and a hydrolysis time of 24 hours. It is then dried at 80℃ for 4 hours. Next, 4% (by mass) of heavy oil component is added, stirred evenly, and dried to obtain the oil shale waste residue solidification and toughening layer.

[0084] Overlay mix proportions: oil shale waste residue with solidified toughening accounts for 30% of the total mass of mineral materials, cementing material accounts for 5.5% of the total mass of mineral materials, and the waste residue particle size is 0-31.5mm.

[0085] The overlay layer is 100mm thick and is laid and compacted in one go, with a compaction degree of not less than 98%.

[0086] Finally, after the added layers are cured until the structure is stable and reaches the design strength, traffic is opened. After construction is completed, the interlayer pull-out strength and interlayer shear strength are used for acceptance.

[0087] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0088] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A construction method for heavy-duty roads in mining areas based on solidified and toughened oil shale waste, characterized in that, Includes the following steps: On the existing layer of the mining area road, the existing layer treatment layer (1), the first bonding layer (2), the high toughness surface layer (3), the second bonding layer (4), and the oil-solidifying and toughening oil shale waste residue overlay layer (5) are laid in the order from bottom to top. The oil-reinforced toughened oil shale waste residue overlay (5) is formed by mixing oil-reinforced toughened oil shale waste residue, aggregates, fillers and cementing materials and then spreading and compacting them. The preparation of the solidified and toughened oil shale waste residue includes: The first material is obtained by crushing, screening and drying oil shale waste residue; The second material is obtained by surface treatment of the first material using a silane coupling agent hydrolysate. The third material is obtained by mixing the second material with the toughening oil component; The third material is dried to obtain the solidified and toughened oil shale waste residue; The toughening oil component is one or more of heavy oil, recycled oil, coal tar modified component, waste engine oil recycled component, petroleum resin modified oil, or modified asphalt. The silane coupling agent hydrolysate is prepared from silane coupling agent, anhydrous ethanol and water.

2. The construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste according to claim 1, characterized in that, The silane coupling agent is one or more of epoxy silane, amino silane, vinyl silane or methacryloxy silane; The pH value of the silane coupling agent hydrolysate is 4-7, and the hydrolysis time is 12-72 h; The silane coupling agent hydrolysate is mixed with the first material by spraying or mechanical mixing, and then dried or aged at 40–120°C for 0.5–24 hours.

3. The construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste according to claim 1, characterized in that, The thickness of the solidified and toughened oil shale waste residue overlay layer (5) is 40-150 mm.

4. The construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste according to claim 1, characterized in that, The existing layer treatment layer (1) is used for surface repair of the existing layer of the mining area road, including filling or sealing cracks in the existing layer of the mining area road, and milling repair of potholes, loose, bulging and network cracked areas in the existing layer of the mining area road. After the existing layer treatment layer (1) is laid, it is cleaned and dusted, leveled, and an interface agent is sprayed.

5. The construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste according to claim 4, characterized in that, The interface agent is composed of anhydrous ethanol, silane coupling agent and water.

6. The construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste according to claim 1, characterized in that, The surface texture depth of the existing layer treatment layer (1) is 0.4 to 1.5 mm, and the compaction degree of the existing layer treatment layer (1) is not less than 96%.

7. The construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste according to claim 1, characterized in that, The first bonding layer (2) is one of modified emulsified asphalt, SBS modified asphalt, rubber modified asphalt or epoxy modified asphalt, and the application rate of the first bonding layer (2) is 0.3 to 1.2 kg / m².

8. The construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste according to claim 1, characterized in that, The high-toughness surface layer (3) is formed by mixing high-toughness binder and mineral aggregate. The high-toughness binder includes base asphalt and toughening modification components. The toughening modification components are one or more of rubber powder, SBS, polyester fiber, basalt fiber, lignin fiber and resin toughening agent.

9. The construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste according to claim 1, characterized in that, The second bonding layer (4) is formed by a high-penetration, high-adhesion interlayer bonding material, which is one of SBS modified emulsified asphalt, rubber asphalt, epoxy asphalt or composite resin interface material. The amount of the second bonding layer (4) is 0.4 to 1.5 kg / m².

10. The construction method for heavy-duty roads in mining areas based on solid-oil toughened oil shale waste according to claim 1, characterized in that, The paving temperature of the high-toughness surface layer (3) is 140-185℃, and the final compaction temperature is not lower than 90℃.

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