Method and device for applying grouting reinforcement material

Abstract

The present invention provides a method for applying a grouting reinforcement material and a device for implementing the method. The method for applying the grouting reinforcement material comprises the following steps: 1) mixing A component and C component; 2) mixing the mixture obtained in step 1) with B component, and adjusting the temperature of the mixture according to the size of the cracks in the body to be reinforced, and then grouting, wherein the A component comprises an alkaline solution and a catalyst; and the B component comprises a polyisocyanate prepolymer and a solubilizer. According to the application method of the present invention, the temperature of the grouting reinforcement material can be adjusted, so as to adjust the gelation time of the grouting reinforcement material, thereby meeting the reinforcement requirements of different cracks.

Description

Technical Field

[0001] The present invention relates to an application method of a grouting reinforcement material and a device for implementing the method. According to the application method of the present invention, the temperature of the grouting reinforcement material can be adjusted, thereby adjusting the gelation time of the grouting reinforcement material to meet different crack reinforcement requirements. Background Art

[0002] In the reinforcement of coal mine coal rock, anti-seepage and leakage blocking of coal mine, reinforcement treatment of dam foundation pit and bearing filling of road subgrade, the materials need to play a good cross-linking role and have excellent mechanical properties, especially excellent bonding properties and shear strength.

[0003] The following problems can arise during coal mining operations: surrounding rock pressure causes the working face to bottom out, leading to a high risk of top coal falling during production, complicating safe and normal mining operations. Improper maintenance can easily lead to roof collapse accidents and the potential collapse of the coal pillar between the original return air lane and the adjustment lane. Coal grouting in the mining face is highly effective in reinforcing the fractured coal mass, significantly improving the rock mass structure and properties, enhancing the integrity of the fractured coal mass, and increasing its overall bearing capacity.

[0004] Water leakage in mine shafts and chambers impacts mine construction and production to varying degrees, causing economic losses and harm. Furthermore, since the leaked water ultimately flows into underground water tanks, it increases the cost and expense of mine drainage facilities. Water leakage in shafts and chambers occurs due to cracks and cavities within the concrete of the shaft or chamber walls and the rock formations behind them, allowing water to flow through these channels and out of the walls. Seepage prevention and plugging technologies rely on grouting and surface waterproofing to block these channels, creating a thick, impermeable layer that prevents water from escaping the wall and achieving the desired effect.

[0005] As a key construction step in dam construction, the importance of dam foundation reinforcement is self-evident. It directly affects the overall construction quality of the dam and is highly valued by construction managers. If the soil conditions of the dam foundation are found to deviate significantly from the design, it is necessary to select appropriate reinforcement technology and properly treat the dam foundation to ensure the quality of dam construction. After long-term use, the dam will gradually show signs of damage due to the influence of surrounding environmental factors. In this case, it is also necessary to properly reinforce the dam foundation to ensure the normal operation of the water conservancy and hydropower project and avoid serious economic losses and safety accidents.

[0006] Road subgrade construction is the most fundamental and crucial part of municipal road construction. Its quality can have a significant impact on the overall quality of the road project. Grouting can be used to reinforce the subgrade, increasing its bearing capacity and load, thereby ensuring the overall quality of the road construction.

[0007] When applying grouting reinforcement materials underground in coal mines, one often encounters uneven cracks in the broken coal and rock masses. Reinforcement construction for such broken coal and rock masses presents significant challenges. Tiny cracks require reinforcement materials with lower viscosity and longer curing times, which facilitate widespread diffusion of the material within the cracks. Larger cracks, on the other hand, require rapid curing of the reinforcement materials; otherwise, liquid material that has not been converted to a solid state will easily flow back or leak through the cracks, making it impossible to continue construction and achieve the desired effect of reinforcing the surrounding rock. The ideal solution is to use reinforcement materials that quickly cure in broken zones with larger cracks to prevent backflow and leakage of the grouting material. For broken zones with smaller cracks, use reinforcement materials with lower viscosity and longer curing times to facilitate widespread diffusion of the material within the cracks, thereby extending the curing time. The ideal curing time for the reinforcement material can be adjusted based on the cracks in the coal and rock mass.

[0008] The conventional method for adjusting the curing time of reinforcement materials is to adjust the amount of catalyst in the material. Increasing the catalyst dosage can speed up the reaction, while reducing it can slow it down. However, this method is very difficult to operate in the actual underground environment and is not convenient for construction personnel to adjust. To ensure the diffusion of the reinforcement material, practical applications require a reinforcement material with low viscosity and moderate curing time to ensure sufficient diffusion of the material into small cracks.

[0009] However, current literature reports only unilaterally adjust the curing time by the type and amount of catalyst added. Preparing slurry on site is inconvenient, especially in coal mine tunnels, where different slurries need to be prepared on site for fracture zones of different crack widths, resulting in low construction efficiency.

[0010] Therefore, there is an urgent need for a method of grouting reinforcement materials that can adjust the curing time according to the width of the coal rock cracks. Especially in the case of uneven coal rock cracks, it can ensure that the reinforcement material is widely diffused in the coal rock mass and the material cures quickly. Summary of the Invention

[0011] To address the problems in the prior art, the inventors of the present invention designed a specific formulation to make the gelation time of the slurry composition within the temperature range of 10 to 80° C. particularly sensitive to temperature. Based on this, the present invention was completed.

[0012] Therefore, the object of the present invention is to provide an application method and an application device of a grouting reinforcement material.

[0013] According to the method of the present invention, the gelation time of the grouting reinforcement material is adjusted by regulating the temperature of the grouting reinforcement material, thereby adapting to working conditions with different cracks.

[0014] According to a first aspect of the present invention, a method for applying a grouting reinforcement material is provided, wherein the grouting reinforcement material comprises component A, component B, and component C in a weight ratio of 1:0.70-0.85:0.01-0.25, wherein:

[0015] Component A comprises an alkaline solution and a catalyst, based on 100 wt % of component A, the content of the alkaline solution is 90-99 wt %; the content of the catalyst is 1-10 wt %;

[0016] Component B contains a polyisocyanate prepolymer and a solubilizer. Based on 100 wt% of component B, the content of the polyisocyanate prepolymer is 90-95 wt%, and the content of the solubilizer is 5-10 wt%. The isocyanate group (NCO) content of the polyisocyanate prepolymer is 22-30%, preferably 24-28%.

[0017] Component C is silicon-aluminum material.

[0018] The method comprises the following steps:

[0019] 1) Mix components A and C:

[0020] 2) The mixture obtained in step 1) is mixed with component B, and then the temperature of the mixture is adjusted according to the size of the cracks in the matrix to be reinforced, and grouting construction is carried out.

[0021] Preferably, when the width of the crack in the substrate to be reinforced is greater than 1 cm, the temperature is adjusted to 30-80°C; when the width of the crack in the substrate to be reinforced is less than 1 cm, the temperature is adjusted to 0-29°C.

[0022] Preferably, the alkaline solution is at least one selected from a potassium hydroxide aqueous solution, a sodium hydroxide aqueous solution, a potassium silicate aqueous solution and a sodium silicate aqueous solution; and the concentration of the alkaline solution is 30 to 60 wt%.

[0023] Preferably, the catalyst is at least one selected from triethylenediamine, N,N-dimethylcyclohexylamine, N,N-dimethylcyclohexyl glycol, pentamethyldiethylenetriamine, dibutyltin dilaurate, dibutyltin diacetate, potassium isooctanoate and potassium oleate.

[0024] Preferably, the solubilizer is at least one of castor oil formate, ethylene glycol diacetate, diethylene glycol butyl ether acetate, tributyl citrate and dioctyl phthalate.

[0025] Preferably, the polyisocyanate prepolymer is prepared from polyphenyl polymethylene polyisocyanate and polymer polyol.

[0026] Preferably, the weight ratio of the polyphenylpolymethylene polyisocyanate to the polymer polyol is 4-20:1.

[0027] Preferably, the polymer polyol is a polyether polyol and / or a polyester polyol, wherein the functionality of the polyether polyol is 2-4, the number average molecular weight is 100-4000, and the viscosity is 100-1000 mPa·s; the functionality of the polyester polyol is 2-4, the number average molecular weight is 200-3500, and the viscosity is 500-2000 mPa·s.

[0028] Preferably, the silicon-aluminum material is one or more selected from slag, coal slag, fly ash, volcanic ash or metakaolin.

[0029] Preferably, the particle size D50 of the silicon-aluminum material is less than 30 microns, preferably less than 20 microns, and more preferably less than 13 microns.

[0030] According to a second aspect of the present invention, there is provided a device for grouting reinforcement materials, comprising:

[0031] A first storage tank, which is used to store a mixture of component A and component C;

[0032] A second storage barrel, which is used to store component B;

[0033] A grouting pump, used to pump the raw materials into the mixer separately through pipelines;

[0034] A mixer for mixing raw materials from the first storage barrel and the second storage barrel;

[0035] A hole sealer connected to the mixer at the discharge end of the mixer; and

[0036] The grouting pipeline connected to the hole sealer is used to inject the mixed slurry into the crack.

[0037] Wherein, the mixer is provided with a heating device.

[0038] Preferably, the heating device is an electric heating device or a casing heating device.

[0039] Preferably, the heat source in the casing heating is one selected from steam, hot water and hot oil.

[0040] Preferably, the mixer is a pipeline static mixer.

[0041] According to the application method of the grouting reinforcement material of the present invention, the temperature of the reinforcement material can be adjusted according to the size of the cracks in the substrate to be reinforced, thereby adjusting the curing time of the material, thereby adapting to the reinforcement requirements of different cracks, avoiding material waste and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a partial schematic diagram of the device for grouting reinforcement material according to the present invention. DETAILED DESCRIPTION

[0043] Example

[0044] The present invention will be described in detail below by way of examples, but the present invention is not limited thereto. In the following examples and comparative examples, unless otherwise specified, the materials used can be obtained commercially, and the methods used are conventional methods in the art.

[0045] The fly ash used was purchased from the Guohua Sanhe Power Plant, and its composition was: 48.2 wt% SiO2, 32.0 wt% Al2O3, 7.9 wt% CaO, 5.65 wt% Fe2O3, the content of other oxides was 6.25 wt%, and the particle size D50 was 3 μm.

[0046] Polyether polyol was purchased from Shandong Dongda Chemical Co., Ltd. with a functionality of 2, a number average molecular weight of 2000, and a viscosity of 270-370 mPa·s.

[0047] The surface non-stick time of the grouting reinforcement material is measured from the start of stirring until the surface of the composite material is no longer sticky when touched by hand.

[0048] In Examples 1 to 8 and Comparative Examples 1 to 6, the gelation time of actual grouting was simulated by the surface non-stick time at different temperatures.

[0049] Example 1

[0050] This embodiment is used to illustrate the composite material and the preparation method thereof of the present invention.

[0051] (1) Preparation of component A

[0052] 97 kg of sodium silicate aqueous solution (content 47% by weight, modulus 2.6) was added to the reactor, and 3 kg of N,N-dimethylaminoethyl glycol was added during stirring. The mixture was stirred for 30 minutes to obtain a clear and transparent component A.

[0053] (2) Preparation of component B

[0054] Preparation of polyisocyanate prepolymer: 82 kg of polyphenyl polymethylene polyisocyanate was added to a reaction kettle, and 18 kg of polyether polyol was added during stirring. The mixture was stirred for 60 min to obtain a brown polyisocyanate prepolymer with an isocyanate group content of 24%.

[0055] 93 kg of the polyisocyanate prepolymer prepared above was added to the reactor, and 7 kg of diethylene glycol butyl ether acetate was added during stirring. The mixture was stirred for 30 minutes to obtain a brown and transparent component B.

[0056] (3) Preparation of composite materials

[0057] 10 kg of component A prepared in step (1) and 2 kg of component C (component C is fly ash with a particle size D50 of 3 μm) were uniformly mixed in a stainless steel barrel. The barrel was then placed in a cold water bath and stirred for 60 minutes. Separately, 8 kg of component B prepared in step (2) was placed in another stainless steel barrel and stirred in a cold water bath. After the two slurries in the two stainless steel barrels reached a constant temperature of 10°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0058] Example 2

[0059] The method of Example 1 was followed, except that in step (3), after the two slurries were kept at a constant temperature of 15°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface tack-free time of the composite material was measured. The results are shown in Table 1.

[0060] Example 3

[0061] The method of Example 1 was followed, except that in step (3), after the two slurries were kept at a constant temperature of 25°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface tack-free time of the composite material was measured. The results are shown in Table 1.

[0062] Example 4

[0063] The method of Example 1 was followed, except that in step (3), after the two slurries were kept at a constant temperature of 40°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface tack-free time of the composite material was measured. The results are shown in Table 1.

[0064] Example 5

[0065] (1) Preparation of component A

[0066] 97 kg of sodium silicate aqueous solution (content 47% by weight, modulus 2.6) was added to the reactor, and 3 kg of N,N-dimethylaminoethyl glycol was added during stirring. The mixture was stirred for 30 minutes to obtain a clear and transparent component A.

[0067] (2) Preparation of component B

[0068] Preparation of polyisocyanate prepolymer: 92 kg of polyphenyl polymethylene polyisocyanate was added to a reaction kettle, and 8 kg of polyester polyol was added during stirring. The mixture was stirred for 60 min to obtain a brown polyisocyanate prepolymer with an isocyanate group content of 28%.

[0069] 95 kg of the polyisocyanate prepolymer prepared above was added to the reactor, and 5 kg of dioctyl phthalate was added during stirring. The mixture was stirred for 30 minutes to obtain a brown and transparent component B.

[0070] (3) Preparation of composite materials

[0071] 10 kg of component A prepared in step (1) and 2 kg of component C (component C is fly ash with a particle size D50 of 3 μm) were uniformly mixed in a stainless steel bucket and placed in a cold water bath and stirred for 60 minutes. Simultaneously, 8 kg of component B prepared in step (2) was stirred in a stainless steel bucket in a cold water bath. After the two slurries in the two stainless steel buckets were kept at a constant temperature of 10°C, component B was transferred to the mixture of A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0072] Example 6

[0073] The method of Example 5 was followed, except that in step (3), after the two slurries were kept at a constant temperature of 15°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0074] Example 7

[0075] The method of Example 5 was followed, except that in step (3), after the two slurries were kept at a constant temperature of 25°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface tack-free time of the composite material was measured. The results are shown in Table 1.

[0076] Example 8

[0077] The method of Example 5 was followed, except that in step (3), after the two slurries were kept at a constant temperature of 40°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0078] Comparative Example 1

[0079] (1) Preparation of component A

[0080] 97 kg of sodium silicate aqueous solution (content 47% by weight, modulus 2.6) was added to the reactor, and 3 kg of N,N-dimethylaminoethyl glycol was added during stirring. The mixture was stirred for 30 minutes to obtain a clear and transparent component A.

[0081] (2) Preparation of component B

[0082] Preparation of polyisocyanate prepolymer: 72 kg of polyphenyl polymethylene polyisocyanate was added to a reaction kettle, and 28 kg of polyether polyol was added during stirring. The mixture was stirred for 60 min to obtain a brown polyisocyanate prepolymer with an isocyanate group content of 20%.

[0083] 93 kg of polyisocyanate prepolymer was added to the reactor, and 7 kg of diethylene glycol butyl ether acetate was added during stirring. The mixture was stirred for 30 minutes to obtain a brown and transparent component B.

[0084] (3) Preparation of composite materials

[0085] 10 kg of component A prepared in step (1) and 2 kg of component C (component C consisting of fly ash with a particle size D50 of 3 μm) were uniformly mixed in a stainless steel barrel and stirred in a cold water bath for 60 minutes. Separately, 8 kg of component B was placed in a stainless steel barrel and stirred in a cold water bath. After the two slurries in the two barrels reached a constant temperature of 10°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0086] Comparative Example 2

[0087] The method of Comparative Example 1 was followed, except that in step (4), after the two slurries were kept at a constant temperature of 15°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0088] Comparative Example 3

[0089] The method of Comparative Example 1 was followed, except that in step (4), after the two slurries were kept at a constant temperature of 25°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0090] Comparative Example 4

[0091] The method of Comparative Example 1 was followed, except that in step (4), after the two slurries were kept at a constant temperature of 40°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0092] Comparative Example 5

[0093] (1) Preparation of component A

[0094] 97 kg of sodium silicate aqueous solution (content 47% by weight, modulus 2.6) was added to the reactor, and 3 kg of N,N-dimethylaminoethyl glycol was added during stirring. The mixture was stirred for 30 minutes to obtain a clear and transparent component A.

[0095] (2) Preparation of component B

[0096] Preparation of polyisocyanate prepolymer: 98 kg of polyphenyl polymethylene polyisocyanate was added to a reaction kettle, and 2 kg of polyether polyol was added during stirring. The mixture was stirred for 60 min to obtain a brown polyisocyanate prepolymer with an isocyanate group content of 30%.

[0097] 97 kg of polyisocyanate prepolymer was added to the reactor, and 3 kg of diethylene glycol butyl ether acetate was added during stirring. The mixture was stirred for 30 minutes to obtain a brown and transparent component B.

[0098] (3) Preparation of composite materials

[0099] 10 kg of component A prepared in step (1) and 2 kg of component C (component C is fly ash with a particle size D50 of 3 μm) were uniformly mixed in a stainless steel barrel and stirred in a cold water bath for 60 minutes. Separately, 8 kg of component B was placed in a stainless steel barrel and stirred in a cold water bath. After the two slurries in the two stainless steel barrels reached a constant temperature of 10°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0100] Comparative Example 6

[0101] The method of Comparative Example 5 was followed, except that in step (4), after the two slurries were kept at a constant temperature of 15°C, component B was transferred to the mixture of components A and C and stirred for 20 seconds to obtain a composite material. The surface non-stick time of the composite material was measured. The results are shown in Table 1.

[0102] Table 1: Surface non-stick time of composite materials

[0103] formula Material temperature / ℃ Surface non-stick time / s Example 1 The formula of Example 1 10 152 Example 2 The formula of Example 1 15 135 Example 3 The formula of Example 1 25 92 Example 4 The formula of Example 1 40 71 Example 5 The formula of Example 5 10 92 Example 6 The formula of Example 5 15 83 Example 7 The formula of Example 5 25 65 Example 8 The formula of Example 5 40 51 Comparative Example 1 The formula of comparative example 1 10 166 Comparative Example 2 The formula of comparative example 1 15 162 Comparative Example 3 The formula of comparative example 1 25 155 Comparative Example 4 The formula of comparative example 1 40 151 Comparative Example 5 The formula of comparative example 5 10 69 Comparative Example 6 The formula of comparative example 5 15 53

[0104] Example 9

[0105] A device for grouting reinforcement materials, comprising: a storage barrel 1 (not shown), which is used to store a mixture of component A and component C, and a storage barrel 2 (not shown), which is used to store component B; storage barrel 1 and storage barrel 2 are connected to a mixer 5 through pipelines via valves 3 and 4 respectively under the action of a grouting pump, and valves 3 and 4 are used to control the mixture of components A and component C, and the flow of component B respectively.

[0106] Figure 1 It is a partial schematic diagram of the device for grouting reinforcement material according to the present invention. Figure 1 As shown, the mixture of components A and C in Example 1 enters the mixer 5 through the pipe (not shown) via the valve 3 under the action of a grouting pump (not shown). Component B in Example 1 enters the mixer 5 through the pipe (not shown) via the valve 4 under the action of a grouting pump (not shown). The mixer is a pipeline static mixer. A heating coil is provided on the surface of the mixture, so that the mixture inside the mixer is heated while mixing. The heating power is adjusted so that the temperature of the mixed slurry coming out of the mixer can be adjusted to 40°C. After the mixing and heating is completed, it enters the grouting pipeline 8 through the connecting pipe 6 and the sealer 7. The slurry is discharged through the grouting pipeline 8 and the cracks are grouting reinforced. After the grouting is completed, the mixer 5 is removed from the connecting pipe 6 and the mixer 5 is flushed with component A. The connecting pipe 6, the sealer 7 and the grouting pipeline 8 are single-hole disposable. After the single-hole grouting is completed, the connecting pipe 6 and the sealer 7 enter the grouting pipeline 8 and will remain in the grouting hole.

[0107] Starting from the moment the grouting line was removed, the slurry surface near the crack remained non-stick for 75 seconds, indicating that the injected material had essentially gelled and ceased to flow. After a period of reaction, the fully cured composite material exhibited high compressive strength, enabling it to reinforce coal and rock masses in coal mines and prevent seepage and leaks.

[0108] Through the above embodiments, it can be seen that by adjusting the temperature of the reinforcement material flowing out of the grouting pipeline by heating, the gel time is shortened as the temperature increases. Therefore, it is possible to adjust the curing time of the grouting reinforcement material by regulating the temperature of the material. When used underground in coal mines, if tiny cracks are encountered and reinforcement materials with long curing times are needed, the initial material temperature can be maintained for grouting reinforcement, which helps the material to diffuse over a large range in the cracks; and if larger cracks are encountered and the reinforcement material needs to be cured quickly, the temperature of the material can be adjusted by adjusting different heating methods, thereby controlling the gel time of the reinforcement material, so that the material does not flow back or leak along the cracks due to liquid material that has not been converted into a solid.

Claims

1. A method for applying a grouting reinforcement material, wherein the grouting reinforcement material comprises component A, component B, and component C in a weight ratio of 1:0.70-0.85:0.01-0.25, wherein: Component A comprises an alkaline solution and a catalyst, based on 100 wt % of component A, the content of the alkaline solution is 90-99 wt %; the content of the catalyst is 1-10 wt %; Component B contains a polyisocyanate prepolymer and a solubilizer, based on 100wt% of component B, the content of the polyisocyanate prepolymer is 90-95wt%, the content of the solubilizer is 5-10wt%, and the isocyanate group content of the polyisocyanate prepolymer is 22-30%; Component C is silicon-aluminum material. The method comprises the following steps: 1) Mix components A and C: 2) The mixture obtained in step 1) is mixed with component B, and then the temperature of the mixture is adjusted according to the size of the cracks in the matrix to be reinforced, and grouting is performed. When the width of the crack in the substrate to be reinforced is greater than 1 cm, the temperature is adjusted to 30-80°C; when the width of the crack in the substrate to be reinforced is less than 1 cm, the temperature is adjusted to 0-29°C; The polyisocyanate prepolymer is prepared from polyphenyl polymethylene polyisocyanate and polymer polyol.

2. The method according to claim 1, wherein The isocyanate group content of the polyisocyanate prepolymer in component B is 24-28%.

3. The method according to claim 1 or 2, wherein: The alkaline solution is at least one selected from a potassium hydroxide aqueous solution, a sodium hydroxide aqueous solution, a potassium silicate aqueous solution and a sodium silicate aqueous solution; and the concentration of the alkaline solution is 30 to 60 wt%; and / or The catalyst is at least one selected from triethylenediamine, N,N-dimethylcyclohexylamine, N,N-dimethylcyclohexyl glycol, pentamethyldiethylenetriamine, dibutyltin dilaurate, dibutyltin diacetate, potassium isooctanoate and potassium oleate.

4. The method according to claim 1 or 2, wherein: The solubilizer is at least one of castor oil formate, ethylene glycol diacetate, diethylene glycol butyl ether acetate, tributyl citrate and dioctyl phthalate.

5. The method according to claim 1, wherein The weight ratio of the polyphenyl polymethylene polyisocyanate to the polymer polyol is 4-20:

1.

6. The method according to claim 1 or 2, wherein: The polymer polyol is a polyether polyol and / or a polyester polyol. The functionality of the polyether polyol is 2-4, the number average molecular weight is 100-4000, and the viscosity is 100-1000 mPa·s; the functionality of the polyester polyol is 2-4, the number average molecular weight is 200-3500, and the viscosity is 500-2000 mPa·s.

7. The method according to claim 1 or 2, wherein: The silicon-aluminum material is one or more selected from slag, coal slag, fly ash, volcanic ash or metakaolin.

8. The method according to claim 1 or 2, wherein: The particle size D50 of the silicon-aluminum material is less than 30 microns.

9. The method according to claim 8, wherein The particle size D50 of the silicon-aluminum material is less than 20 microns.

10. The method according to claim 8, wherein The particle size D50 of the silicon-aluminum material is less than 13 microns.

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