All-solid-waste-based grouting reinforcement material and preparation method thereof

Abstract

The invention belongs to the technical field of ecological grouting reinforcement materials and preparation, and provides an all-solid waste grouting reinforcement material and a preparation method thereof, and the all-solid waste grouting reinforcement material is prepared from fly ash, mineral powder, red mud, desulfurized petroleum coke ash, water and a water reducing agent. Distilled water is added into the dried, ground and screened red mud, and the soluble alkali in the red mud is calculated after full oscillation and drying. The effect of replacing an alkali activator is achieved by compounding with desulfurized petroleum coke ash. All the raw materials are mechanically stirred and molded to prepare the all-solid waste grouting reinforcement material. According to the invention, the desulfurized petroleum coke ash is neutralized by using the red mud, and the red mud is respectively used as a sodium-based exciting agent and a calcium-based exciting agent to replace an alkaline exciting agent, so that the cost is reduced, and the material shrinkage is reduced. The grouting reinforcement material is prepared from the solid waste, the problem of waste of solid waste resources is effectively solved, the problem that a cement-based grouting reinforcement material is low in early strength is solved, and the grouting reinforcement material has a wide application prospect in the field of low-carbon energy-saving tunnel and foundation engineering reinforcement.

Description

Technical Field

[0001] The present invention belongs to the technical field of ecological grouting reinforcement materials and preparation thereof, and in particular relates to a fully solid waste-based grouting reinforcement material and a preparation method thereof. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] During subway tunnel construction, due to the inherent stratification and complexity of underground space, soil excavation inevitably encounters soft soil, loose soil, and silty sand layers. These unstable soil layers can have a significant negative impact on construction safety and the stability of surface buildings. Furthermore, the existing pipelines and tunnels in the underground space, as well as above-ground buildings, impose even stricter standards on underground construction. Currently, grouting reinforcement technology has become an effective solution for reinforcing loose soft soil and addressing soil disturbance caused by excavation, ensuring that the soil achieves the required engineering properties while also protecting above-ground structures. Geopolymer grouting materials are often prepared from highly reactive solid wastes such as blast furnace slag, fly ash, and red mud. However, current all-solid waste grouting reinforcement materials often struggle to simultaneously achieve excellent mechanical properties, stone formation rate, and impermeability. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a full-solid waste grouting reinforcement material and a preparation method thereof, which efficiently combines industrial solid waste, can improve the resource utilization rate of solid waste, reduce environmental pollution, and help achieve low-carbon and sustainable development when grouting reinforcement materials are used in the fields of tunnel and foundation engineering reinforcement.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The first aspect of the present invention provides an all-solid waste grouting reinforcement material, which is composed of the following raw materials in parts by weight: 1 part of fly ash, 0.75 part of mineral powder, 0.25-0.38 part of red mud, 0.13-0.38 part of desulfurized petroleum coke ash, 0.02-0.04 part of water reducer, and 1.7-2 parts of water.

[0007] The present invention can directly obtain multi-solid waste-based gelling material by using fly ash, mineral powder, red mud and desulfurized petroleum coke ash in industrial solid waste, while eliminating the addition of alkali activator.

[0008] Red mud and desulfurized petroleum coke alkali are used to activate mineral powder and fly ash. The corresponding reaction formula is as follows:

[0009] [SiO3 2- ]n ·Ca 2+ +2NaOH→[SiO3 2- ] n 2Na + +Ca 2+ +2OH - (1)

[0010] SiO2+m1Ca(OH)2+m2H2O→m1CaO·SiO2·(m1+m2)H2O (2)

[0011] Al2O3+M1Ca(OH)2+M2H2O→M1CaO·Al2O3·(M1+M2)H2O (3)

[0012] SiO2+n1NaOH+n2H2O→n1NaO·SiO2·(n1+n2)H2O (4)

[0013] Al2O3+N1NaOH+N2H2O→n1NaO·Al2O3·(N1+N2)H2O (5)

[0014] The second aspect of the present invention provides a method for preparing a solid waste grouting reinforcement material, comprising:

[0015] Fly ash, mineral powder, red mud and desulfurized petroleum coke ash are mixed evenly, and then water and a water reducing agent are added and mixed evenly to obtain a slurry;

[0016] The slurry is poured into the underground rock layer and solidified to obtain the product.

[0017] The third aspect of the present invention provides the application of the above-mentioned all-solid waste grouting reinforcement material in the field of tunnel and foundation engineering reinforcement.

[0018] Beneficial effects of the present invention

[0019] (1) First, red mud is washed with water to dissolve Na + OH - , providing an initial alkaline environment and simultaneously desulfurizing petroleum coke ash to dissolve Ca 2 + OH - , thus forming a double-alkali excitation environment (Na + , Ca 2+ synergistically); and then the surface of mineral admixtures (mineral powder, fly ash) is affected by OH - Erosion, release [SiO4] 4- 、[AlO4] 5- Monomer, with Ca 2+ Combined to form CASH gel. Second, CaSO4 in desulfurized petroleum coke ash dissolves to release SO42- , corresponding SO4 2- Al with mineral admixtures 3+ , Ca 2+ Forming ettringite to fill the pores. Thirdly, the Fe2O3 in red mud partially dissolves into Fe 3+ , partially replaces the Al in mineral admixtures 3+ Fe-CASH gel is formed, and finally a geopolymer network with good stone formation rate is formed.

[0020] (2) The mineral powder, fly ash, red mud, and desulfurized petroleum coke ash used in the present invention are industrial solid wastes rich in components such as CaO, SiO2, Na2O, Fe2O3, and SO3. The cementitious materials formed from these materials have similar composition to Portland cement and possess potential cementitious properties. Furthermore, the soluble alkali contained in the red mud and the calcium-based activation potential of the desulfurized petroleum coke ash can eliminate the need for alkaline activators in the alkali-activated materials. This can significantly reduce the environmental hazards caused by alkali leaching, lower production costs, and achieve low-carbon economic development.

[0021] (3) The all-solid waste grouting reinforcement material mentioned in the present invention is the first to add desulfurized petroleum coke ash to the grouting reinforcement material. Desulfurized petroleum coke ash is rich in elements such as silicon and aluminum. Under the catalytic action of an alkaline environment, its active ingredients dissolve and participate in the polymerization reaction, forming a three-dimensional network gel structure with silicon oxide tetrahedron (SiO4) and aluminum oxide tetrahedron (AlO4) as basic units, thereby giving the material high strength, corrosion resistance and densification properties. In addition, the introduction of desulfurized petroleum coke ash can optimize the material ratio and cooperate with other industrial solid wastes (such as fly ash, mineral powder, etc.) to improve the reaction efficiency and microstructural density of the grouting reinforcement material.

[0022] (4) The all-solid waste grouting reinforcement material prepared by the present invention is transferred to a container and then injected into the cracks of the underground rock layer of the Qingdao Metro Shield using a pressure spray gun. After it solidifies and hardens, in-situ sampling is performed to evaluate its mechanical strength, stone rate, and impermeability. Performance test results show that the grouting material has good fluidity; the 3-day and 28-day compressive strengths are higher than those of traditional geopolymer grouting reinforcement materials, the stone rate is high, and the material stability is strong; the impermeability performance is better, the carbon emissions are lower, and it is more environmentally friendly.

[0023] Clearly, this invention develops a multi-layered, diversified all-solid waste grouting reinforcement material from industrial solid waste. Compared with traditional cement-based grouting materials, this all-solid waste grouting material has a shorter setting time, higher compressive strength, and lower energy consumption and costs during production, resulting in significant economic and social benefits. It also achieves "zero addition" of alkali activators, promoting the sustainable development of ecological grouting reinforcement materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 This is a diagram of the molecular structure reaction mechanism of red mud, desulfurized petroleum coke ash and alkali-activated fly ash and mineral powder. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] The first aspect of the present invention provides an all-solid waste grouting reinforcement material, which is composed of the following raw materials in parts by weight: 1 part of fly ash, 0.75 part of mineral powder, 0.25-0.38 part of red mud, 0.13-0.38 part of desulfurized petroleum coke ash, 0.02-0.04 part of water reducer, and 1.7-2 parts of water.

[0028] Bayer red mud, due to its high content of Na₂O, SiO₂, and Al₂O₃, also possesses potential for gelling. Red mud has a large specific surface area and contains a large amount of soluble NaOH. Proper use of red mud can not only reduce the use of industrial caustic soda and effectively address the ecological safety risks posed by leachate, but also improve the pore structure of hardened cement paste, enhancing its mechanical properties and durability.

[0029] In some embodiments, the red mud is Bayer process aluminum tailings powder.

[0030] As a key component of solid waste-based grouting materials, red mud achieves performance optimization and resource utilization through chemical, physical and environmental synergistic mechanisms. At the chemical level, active minerals such as dicalcium silicate and tricalcium aluminate in red mud release Ca in an alkaline environment. 2+ , Al3+, reacts with silicon-alumina solid waste to form CSH gel and ettringite, which improves the early strength. At the same time, its high pH value (11-13) stimulates the dissociation of mineral powder glass, accelerates the volcanic ash reaction, and stabilizes heavy metals through hydroxide precipitation and gel encapsulation; Physically, red mud microparticles (D 50 ≈15μm) to fill the pores, reduce the porosity by more than 30%, and make the slurry permeability coefficient <10 - 8 cm / s, its high specific surface area (300-500m 2 / kg) can adjust rheological properties and achieve a fluidity of 180-220mm when combined with a water reducer; in terms of environmental benefits, a red mud content of 30%-60% can increase the solid waste utilization rate to over 80%, reduce carbon emissions by 60%, and neutralize acidic pollutants.

[0031] In some embodiments, the soluble alkali content of the red mud is ≥3.87%.

[0032] In some embodiments, the red mud is obtained by drying, grinding, and sieving. Specifically, the treated red mud is placed in a volumetric flask, distilled water is added, and the mixture is shaken for 30 minutes. The clarified solution is filtered and dried to obtain a soluble alkali content of 3.87%. The soluble alkali content of different batches of red mud is determined according to the above method.

[0033] In some embodiments, the quality of the mineral powder is S95 grade or above, and the specific surface area is ≥300m 2 / kg.

[0034] Fly ash, a typical solid waste from coal-fired power plants, has high silicon-aluminum activity and can react with alkaline activators to form a stable gelled phase. As a representative material for both alkali-activated high-calcium and alkali-activated low-calcium materials, fly ash is rich in CaO, SiO2, and Al2O3. Fly ash particles contain over 70% spherical microspheres, which exert a rolling effect, effectively improving the workability of grouting reinforcement materials and the shrinkage of the hardened body. In some embodiments, the fly ash is of Grade II quality or higher.

[0035] Desulfurized petroleum coke ash is the residual fine ash after petroleum coke and desulfurizer are calcined at high temperature in a circulating fluidized bed boiler. Its main components are CaO and SO3, which are the same as the components of lime and gypsum, and can provide the calcium and sulfur elements required for the hydration reaction. Desulfurized petroleum coke ash can be used to replace part of the cement in the production of grouting materials, which not only reduces the emission of cement clinker and CO2, but also turns desulfurized petroleum coke ash from "waste" into "treasure", improving its resource utilization. In some embodiments, the main mineral components of the desulfurized petroleum coke ash are f-CaO and CaSO4, X 50 The particle size is below 4.67 μm, and the fineness modulus is 1.8 or above. On the one hand, compared with sodium-based activators, it can better activate the activity of silicon and aluminum components in solid wastes such as mineral powder, fly ash, and red mud, ensuring the continuous growth of the strength of the cementitious system. On the other hand, although the combination of desulfurized petroleum coke ash with conventional cement systems can easily lead to expansion and cracking of the cementitious system, conventional alkali-activated cementitious materials have large shrinkage. When introduced into alkali-activated cementitious materials as a calcium-based activator, it can exert its inherent expansion properties and effectively reduce the shrinkage and cracking tendency of the corresponding alkali-activated cementitious system.

[0036] In some embodiments, the water reducer is one of polycarboxylic acid, aliphatic, and melamine resin high-efficiency water reducers, with a water reduction rate of more than 20%.

[0037] The present invention will be further described in detail below with reference to specific embodiments. It should be noted that the specific embodiments are intended to explain rather than limit the present invention.

[0038] In the following examples and comparative examples, the performance testing methods are as follows:

[0039] 1. Stability: Place the pre-prepared Levitra clamp on a lightly oiled glass plate and immediately fill the test mold with the prepared standard consistency slurry. While filling the mold, gently support it with one hand while using a 25mm wide knife with the other hand to poke and tamp it three times. Smooth it flat and cover it with a lightly oiled glass plate. Immediately transfer the mold to a steam curing chamber and cure for 24 hours ± 2 hours. Remove the glass plate and remove the test specimen. Measure the distance between the test specimen pointers to an accuracy of 0.5mm. Place the test specimen on a grate with the pointers pointing upward, preventing them from crossing each other. Heat to boiling within 30 minutes ± 5 minutes and maintain a constant boiling temperature for 3 hours ± 5 minutes. After boiling, cool the test specimen to room temperature and remove it. The distance between the test specimen pointers (C) should be measured to an accuracy of 0.5mm.

[0040] 2. Compressive performance test: According to GB / T17671-2021 "Test method for strength of cement mortar (ISO method)", the indoor test uses 40mm×40mm×160mm prism specimens to conduct compressive strength tests under different proportions and different ages (3d, 28d). Three specimens are grouped together, and the experimental results are the average values ​​of the six strengths obtained.

[0041] 3. Fluidity: Place a clean piece of organic glass horizontally and place a micro slump test cone at the center of the organic glass; at the same stirring rate and time, slowly pour the slurry from the top of the slump test cone into the slump cone to fill the slump test cone, and knock the side wall of the test cone to make it dense, and use a scraper to remove excess slurry; quickly lift the slump test cone in the vertical direction, and the slurry will diffuse around under its own weight until the diffusion is complete; use a ruler to measure the diffusion diameter along a straight line, and take the average value as the fluidity.

[0042] 4. Setting Time: The setting time test is conducted in accordance with GB / T1346-2011, "Test Methods for Water Consumption, Setting Time, and Stability of Cement at Standard Consistency." The slurry is prepared using a cement slurry mixer, and the setting time is measured using a Vicat apparatus.

[0043] 5. Stone rate: Pour the stirred slurry into a 250mL disposable measuring cylinder, let it stand for 24 hours, measure the volume of the stone in the measuring cylinder, and calculate the stone rate by comparing it with the volume before grouting.

[0044] 6. Impermeability: The impermeability test of grouting materials uses an SJ-15 mortar impermeability tester to test the permeability coefficient of the stone body of the grouting reinforcement material. Prepare a scraper to smooth the surface during sample preparation, and prepare sufficient plastic wrap to seal the stone body sample during the test. Remove the round metal test mold on the impermeability tester. The test mold size is 70mm in upper diameter, 80mm in lower diameter, and 30mm in height. Wash the test mold in clean water and place it on a clean thick glass plate. Prepare the grouting slurry according to the ratio, and then immediately pour it into the conical metal test mold along the glass rod. Insert the glass rod repeatedly into the slurry for manual vibration to remove bubbles in the slurry. Stop pouring the slurry when the slurry overflows the upper surface of the test mold. Use a scraper at a 45° angle to repeatedly scrape off the overflowing slurry on the upper surface until the slurry is flush with the upper surface of the test mold. Stop smoothing and then cover the top of the test mold with plastic wrap. The test mold was cured at room temperature (20±5)°C for 1 day before demolding. The demolded specimens were then placed in a standard curing chamber at (20±3)°C and humidity >95% for 28 days. Three specimens were required for each group. After curing to the specified age, the specimens were removed and allowed to stand at room temperature until their surfaces were dry. Afterward, they were placed in a conical metal test mold and heated in a drying oven to dry out any free moisture. The test mold was then removed and rolled sideways in liquid paraffin to ensure an even fit between the outer edges of the mold and the seal. The sealed conical test mold was then placed in a mortar permeability tester. The tester's water inlet was connected to a faucet using a high-pressure hose. The tester was switched on and the water permeability test began. The initial water supply pressure was adjusted to 0.2 MPa and the water supply valve was opened. If water leaked from the side of the test block, the test was not completely sealed and the test should be stopped immediately and resealed. If no leakage occurs, the initial water pressure is maintained at 0.2 MPa for 2 hours, then increased by 0.3 MPa, and then increased by 0.1 MPa every hour until leakage occurs at the top of the test block. The test is stopped, and the maximum pressure value F and pressurization time T on the anti-seepage instrument panel are recorded, and the water permeability Q is collected. T calculate:

[0045] I T =QR-FAt. (6)

[0046] Where: I T =Permeability coefficient, cm / s; F = average pressure head loss during water permeability, cm; Q = water flow rate during water permeability, cm 3 ; R-penetration height, cm; A-penetration sample cross-sectional area, cm 2 ; t is the time of water penetration, s.

[0047] In the following examples and comparative examples, the water reducer is a polycarboxylic acid water reducer with a water reduction rate of 30%, which was purchased from Jinan Suborui Building Materials Co., Ltd.

[0048] Example 1

[0049] This embodiment proposes an all-solid waste grouting reinforcement material, and the weight proportions of the raw materials are as follows: 1 part fly ash, 0.75 part mineral powder, 0.25 part red mud, 0.13 part desulfurized petroleum coke ash, 0.02 part water reducer, and 1.7 parts water.

[0050] The preparation method of the above-mentioned all-solid waste grouting reinforcement material is as follows:

[0051] (1) Weigh fly ash, mineral powder, red mud, and desulfurized petroleum coke ash according to the above proportions;

[0052] (2) Place the material obtained in step (1) in a stirring pot and stir at low speed for 2 minutes;

[0053] (3) Weigh the water reducer and water according to the above ratio and mix them evenly;

[0054] (4) Add the materials in step (3) into the blender and stir at high speed for 2 minutes;

[0055] (5) The mixture obtained in step (4) is transferred into a container, and then injected into the cracks of the underground rock layer of the Qingdao Metro Shield using a pressure spray gun.

[0056] Example 2

[0057] This embodiment proposes an all-solid waste grouting reinforcement material, which differs from Example 1 in that it contains 0.31 parts of red mud, 0.26 parts of desulfurized petroleum coke ash, 0.03 parts of water reducer, and 1.85 parts of water.

[0058] The all-solid waste grouting reinforcement material and its preparation method in this embodiment are the same as those in Example 1 and will not be repeated here.

[0059] Example 3

[0060] This embodiment proposes an all-solid waste grouting reinforcement material, which differs from Example 1 in that it contains 0.38 parts of red mud, 0.38 parts of desulfurized petroleum coke ash, 0.04 parts of water reducer, and 2 parts of water.

[0061] The all-solid waste grouting reinforcement material and its preparation method in this embodiment are the same as those in Example 1 and will not be repeated here.

[0062] Control group 1

[0063] The conventional mechanical mixing method was used to prepare geopolymer grouting reinforcement material without red mud and desulfurized petroleum coke ash. The water glass modulus was 3.2, and the corresponding material mass ratio was: 1 part fly ash, 0.75 part mineral powder, 0.02 part water reducer, 1.7 parts water, and 0.2 part water glass.

[0064] Control group 2

[0065] The conventional mechanical stirring method was used to prepare geopolymer grouting reinforcement material without desulfurized petroleum coke ash. The corresponding material mass ratio was: 1 part of fly ash, 0.75 parts of mineral powder, 0.25 parts of red mud, 0.02 parts of water reducer, 1.7 parts of water, and 0.2 parts of water glass.

[0066] Control group 3

[0067] As shown in Example 1 of patent application number CN113754331A, a red mud-based cementitious material (grouting reinforcement material) was prepared by a conventional mechanical stirring method, and the corresponding material mass ratio was: 4 parts red mud, 4 parts mineral powder, 0.5 parts quicklime, 1 part fly ash, and 0.5 parts sodium silicate.

[0068] Table 1 shows the slurry stability, setting time, fluidity, 3d and 28d compressive strength, stone rate, anti-permeability coefficient, and carbon emission of Examples 1-3 of the present invention and Control Groups 1-3.

[0069] Table 1 Performance test results of grouting reinforcement materials in different groups

[0070]

[0071] From the comparison between Example 1 and Control Group 1, it can be seen that compared with the traditional alkaline activator, the geopolymer grouting reinforcement material formed by red mud and desulfurized petroleum coke ash has better mechanical properties, solidity and impermeability, and at the same time, the carbon emissions are significantly reduced.

[0072] From the comparison between Example 1 and Control Groups 2 and 3, it can be seen that the addition of desulfurized petroleum coke ash effectively improves the mechanical properties, solidity and impermeability of the geopolymer grouting reinforcement material, while significantly reducing carbon emissions.

[0073] As shown in Table 1, the solidification time of the all-solid waste grouting reinforcement material prepared in the present invention is 15-25 min, the fluidity is 287-320 mm, the 3d compressive strength is 8.41-19.4 MPa, the 28d compressive strength is 28.46-35.19 MPa, and the stone rate is 98.1-99.6%. Compared with the performance of control groups 1-3, their stability is less than 5mm, indicating that the volume stability is qualified, the setting time is reduced by 61.54-76.92%, 68.75-81.25% and 88.21-92.92%; the fluidity is increased by 34.11-49.53%, 26.43-40.97% and 63.07-81.82%; the 3d compressive strength is increased by 25.3-189.1% and 12.43-159.36%, 1 and 2 are reduced by 49.94% and 39.36% compared with control group 3, 3 is increased by 10.47% compared with control group 3; the 28d compressive strength is increased by 73-119.3 %, 54.42-90.94% and 1 and 2 compared with the control group 3 decreased by 16.78% and 10.12%, 3 compared with the control group 3 increased by 10.47%; the stone rate increased by 1.2-2.8% and 0.31-1.84%, 1 compared with the control group 3 decreased by 0.51%, 2, 3 compared with the control group 3 increased by 0.10% and 1.01%; the impermeability coefficient decreased by 37.21-60.47%, 26.03-53.42% and 47.06-66.67%; carbon emissions decreased by 60.56-62.43%, 62.47-64.24% and 45.29-47.87%, and the performance was significantly improved.

[0074] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A solid waste grouting reinforcement material, characterized in that: The invention is composed of the following raw materials in parts by weight: 1 part of fly ash, 0.75 part of mineral powder, 0.25-0.38 part of red mud, 0.13-0.38 part of desulfurized petroleum coke ash, 0.02-0.04 part of water reducing agent and 1.7-2 parts of water.

2. The all-solid waste grouting reinforcement material according to claim 1, characterized in that: The red mud is aluminum tailings powder produced by the Bayer process.

3. The all-solid waste grouting reinforcement material according to claim 1, characterized in that: The soluble alkali content of the red mud is ≥3.87%.

4. The all-solid waste grouting reinforcement material according to claim 1, characterized in that: The red mud is obtained by drying, grinding and sieving.

5. The all-solid waste grouting reinforcement material according to claim 1, characterized in that: The quality of the mineral powder is S95 grade or above, with a specific surface area of ​​≥300m 2 / kg.

6. The all-solid waste grouting reinforcement material according to claim 1, characterized in that: The quality of the fly ash is Grade II or above.

7. The all-solid waste grouting reinforcement material according to claim 1, characterized in that: The main mineral components of the desulfurized petroleum coke ash are f-CaO and CaSO4, X 50 The fineness modulus is 1.8 or above and the particle size is below 4.67 μm.

8. The all-solid waste grouting reinforcement material according to claim 1, characterized in that: The water reducing agent is one of polycarboxylic acid type, aliphatic type and melamine resin type high efficiency water reducing agents, and the water reducing rate is above 20%.

9. A method for preparing all-solid waste grouting reinforcement material, characterized in that: include: Fly ash, mineral powder, red mud and desulfurized petroleum coke ash are mixed evenly, and then water and a water reducing agent are added and mixed evenly to obtain a slurry; The slurry is poured into the underground rock layer and solidified to obtain the product.

10. Application of the all-solid waste grouting reinforcement material according to any one of claims 1 to 9 in the field of tunnel and foundation engineering reinforcement.

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