Preparation method of environment-friendly water-based polymer rapid first-aid repair material

Abstract

The invention discloses a preparation method of an environment-friendly water-based polymer rapid first-aid repair material, and relates to the technical field of first-aid repair, and the preparation method comprises the following steps: preparing a retarder with a temperature response characteristic, preparing a composite water-based polymer emulsion by using multiple emulsions, and adding a magnesium binding material to prepare the rapid first-aid repair material. The repair material has the advantages that the temperature-sensitive retarder is added, the setting time of the repair material can be adjusted according to the change of the environment temperature, the setting speed of the repair material can be effectively delayed by the retarder in the environment with higher temperature, enough operation time is provided for constructors, and the repair material is not prone to falling off in the environment with lower temperature. The effect of prolonging the setting time of the first-aid repair material by the thermo-sensitive retarder can be properly weakened, the retarder cannot excessively delay setting, the first-aid repair material can still be hardened within reasonable time and reach certain strength, and due to the thermo-sensitive retarder, the setting process of the first-aid repair material at different temperatures can be more stable, and the formation of the internal structure of the material is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of emergency repair, in particular to a method for preparing an environmentally friendly water-based polymer rapid emergency repair material. Background Art

[0002] Road repair material is a kind of repair material made of high-strength cementing material, multiple admixtures and specially selected aggregates through special process. It has the characteristics of high fluidity, no shrinkage, early strength and high strength. With the improvement of people's living standards, there are more and more cars and trucks used for construction, which have brought a great burden to the roads. If the roads are not repaired in time after being damaged, it is not only easy to get stuck in traffic but also easy to cause traffic accidents. However, the roads must be closed during the maintenance period, which affects the normal traffic of vehicles. Therefore, people hope to complete the road repair in less time, and more and more research on road repair materials is also increasing.

[0003] The operable time of some emergency repair materials (the time from material mixing to the beginning of solidification) is short, which requires construction workers to have skilled operating skills and a fast construction speed. Otherwise, once the material begins to solidify, it will be difficult to carry out operations such as paving and shaping, resulting in material waste and poor emergency repair effects. For this reason, we propose a method for preparing an environmentally friendly water-based polymer rapid emergency repair material. Summary of the invention

[0004] The purpose of the invention is to provide a method for preparing an environmentally friendly water-based polymer rapid repair material.

[0005] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: a method for preparing an environmentally friendly water-based polymer rapid repair material, comprising preparing a retarder with temperature responsive characteristics, using multiple emulsions to prepare a composite water-based polymer emulsion, and adding a magnesium gelling material to prepare a rapid repair material. The specific steps for preparing the environmentally friendly water-based polymer rapid repair material are as follows:

[0006] Step 1: introducing a temperature-sensitive polymer into the retarder to control the retarding effect of the retarder by temperature;

[0007] Step 2: Based on acrylic emulsion, a polyurethane microemulsion phase and an organosilicon emulsion phase are introduced to prepare a composite aqueous interpenetrating network structure polymer emulsion;

[0008] Step 3: using magnesia ore as a raw material to prepare a magnesium cementitious material;

[0009] Step 4: Mixing the magnesium gelling material, the retarder and the polymer emulsion with the cement raw material to prepare a quick repair material;

[0010] Step 5: Evaluate the solidification time of the quick repair material under different temperature conditions;

[0011] Step 6: Conduct performance test on the solidified quick repair material.

[0012] As a further solution of the present invention: in the step 1, N-isopropylacrylamide (NIPAM) is selected as the temperature-sensitive polymer, hydroxyethyl acrylate (HEA) is selected as the retarding functional group monomer, and N,N'-methylenebisacrylamide (MBA) is selected as the cross-linking agent. NIPAM, HEA and MBA are dissolved in deionized water at a ratio of 5:3:1 to obtain a reaction mixture, and 0.1 mol / L ammonium persulfate and 0.05 mol / L sodium bisulfite aqueous solutions are prepared respectively.

[0013] As a further scheme of the present invention: in the step 1, the prepared aqueous solution is added dropwise to the reaction mixture at a rate of 1 mL / min-2 mL / min, the temperature is controlled at 30°C-40°C during the dropping process, and the mixture is stirred at a rate of 100 r / min-200 r / min. After the dropping is completed, the reaction temperature is maintained and stirring is continued for 3h-5h. After the reaction is completed, the obtained polymer solution is naturally cooled to room temperature, and then the polymer solution is poured into anhydrous ethanol for precipitation, solid particles are precipitated from the polymer solution, and the solid particles are washed and dried to obtain a retarder with NIPAM.

[0014] As a further scheme of the present invention: in the step 2, the acrylic emulsion, the polyurethane microemulsion and the silicone emulsion are added into a high-speed stirrer in a ratio of 6:3:1, and stirred at a rate of 40r / min-60r / min for 10min-15min for premixing. At the same time, ammonia water is added to adjust the pH value of the mixed emulsion to 7-8, and stirring is continued for 5min-10min. Then, MBA accounting for 0.1%-0.5% of the total weight of the monomers in the acrylic emulsion is added, and stirring is continued for 30min-60min at a temperature of 40°C-50°C and a rate of 100r / min-120r / min for reaction. After the reaction is completed, the mixed emulsion is continued to be stirred at room temperature for 1h-2h for maturation. After maturation, the mixed emulsion is filtered and cleaned to obtain a composite aqueous interpenetrating network structure polymer emulsion.

[0015] As a further scheme of the present invention: in the step three, magnesite is added into a calcining furnace and calcined at a temperature of 700°C-1000°C for 10h-30h, the calcined product is cooled to room temperature and added into a ball mill, the magnesite is crushed into 300-400 mesh using a 30mm-50mm steel ball to prepare light-burned magnesium oxide powder, the light-burned magnesium oxide powder is added into a magnesium chloride solution, and stirred at a rate of 30r / min-50r / min for 3min-5min to obtain a magnesium gelled slurry.

[0016] As a further scheme of the present invention: in the step 4, cement, fine bone meal and coarse bone meal are added into a mixer, stirred at a rate of 100 r / min-150 r / min for 3 min-5 min to obtain a dry mix, the prepared magnesium cementitious slurry is added into the dry mix, and a retarder and a polymer emulsion are added, wherein the amount of the retarder is 0.1%-0.5% of the mass of magnesium oxide, and stirred at a rate of 200 r / min-300 r / min for 5 min-8 min to obtain a quick repair material.

[0017] As a further solution of the present invention: in the step 5, the emergency repair material is placed in a stirring pot, and clean water is added to the stirring pot, and stirred at a rate of 50r / min-80r / min for 1min-2min to form a uniform slurry, and the stirred slurry is poured into a truncated cone with an upper inner diameter of 70mm, a lower inner diameter of 80mm, and a height of 40mm, and the slurry surface is smoothed with a spatula so that the slurry surface is flush with the edge of the test mold, and the test mold filled with the slurry is placed in a standard curing box, and the standard curing box is filled with the slurry. The temperatures were set to 10℃, 20℃, 30℃, 40℃, 50℃ and 60℃ respectively and tested independently. The time was recorded and a test was conducted every 5 minutes after 25 minutes. During the test, the initial setting test needle of the Vicat instrument was vertically inserted into the center of the slurry. The insertion depth of the test needle was 3mm-4mm from the bottom of the test mold. Then the test needle was relaxed and allowed to sink freely into the slurry. When it was observed that the test needle stopped sinking for 30s and the sinking depth was <1mm, the time recorded at this time was the initial setting time of the rapid repair material.

[0018] As a further solution of the present invention: in the step five, after the initial setting time is determined, the final setting test needle is replaced on the Vicat instrument, and the slurry is continued to be cured in the standard curing box. A test is performed every 15 minutes after 1h-2h after the initial setting. The final setting test needle is vertically inserted into the center of the slurry. The insertion depth of the test needle is 0.5mm from the bottom of the test mold. When the test needle sinks into the slurry and no longer sinks, and the annular attachment on the test needle cannot leave any marks on the surface of the slurry, the time at this time is recorded, which is the final setting time of the quick repair material.

[0019] As a further scheme of the present invention: in the step six, the surface color, agglomeration and stratification of the quick repair material after solidification are observed with the naked eye, the compressive strength of the quick repair material is tested using a pressure testing machine, the linear expansion coefficient of the quick repair material when the temperature changes is determined by a thermal expansion instrument, the quick repair material is placed in an environment of 10°C, 20°C, 30°C, 40°C, 50°C and 60°C, the physical state and mechanical property changes of the quick repair material are observed, and after the quick repair material specimens are immersed in water for 24h-48h, the changes in the strength and quality indicators of the quick repair material are detected to evaluate its water resistance.

[0020] By adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The present invention adds a temperature-sensitive retarder, which can adjust the setting time of the emergency repair material according to the change of the ambient temperature. In a high-temperature environment, the retarder can effectively delay the setting speed of the emergency repair material, providing sufficient operation time for construction personnel. In a low-temperature environment, the extension effect of the temperature-sensitive retarder on the setting time of the emergency repair material will be appropriately weakened, and the retarder will not excessively delay the setting, so that the emergency repair material can still harden and reach a certain strength within a reasonable time. Since the temperature-sensitive retarder can make the setting process of the emergency repair material at different temperatures more stable, the formation of the internal structure of the material is more uniform, and the internal stress of the material caused by thermal expansion and contraction during the temperature change process will be reduced, thereby effectively reducing the generation of temperature cracks;

[0022] 2. The present invention forms a unique network structure in the emergency repair material through an aqueous interpenetrating network structure composite polymer emulsion. When the emergency repair material is impacted by external force, this network structure can effectively absorb and disperse energy, making the material less likely to undergo brittle fracture, thereby significantly improving its toughness and impact resistance. The network structure formed by the emulsion cooperates with cementitious materials such as cement to jointly bear the load. When subjected to compression or bending, the flexible chain segments of the polymer can provide additional support, thereby significantly improving the compressive and flexural strengths of the emergency repair material, thereby ensuring that the repaired structure can meet the expected load-bearing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the process of preparing the environmentally friendly water-based polymer rapid repair material in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] The invention discloses a method for preparing an environmentally friendly water-based polymer rapid emergency repair material, comprising preparing a retarder with temperature responsive characteristics, using multiple emulsions to prepare a composite water-based polymer emulsion, and adding a magnesium gelling material to prepare the rapid emergency repair material. The specific steps of preparing the environmentally friendly water-based polymer rapid emergency repair material are as follows:

[0026] Step 1: introducing a temperature-sensitive polymer into the retarder to control the retarding effect of the retarder by temperature;

[0027] Step 2: Based on acrylic emulsion, a polyurethane microemulsion phase and an organosilicon emulsion phase are introduced to prepare a composite aqueous interpenetrating network structure polymer emulsion;

[0028] Step 3: using magnesia ore as a raw material to prepare a magnesium cementitious material;

[0029] Step 4: Mixing the magnesium gelling material, the retarder and the polymer emulsion with the cement raw material to prepare a quick repair material;

[0030] Step 5: Evaluate the solidification time of the quick repair material under different temperature conditions;

[0031] Step 6: Conduct performance test on the solidified quick repair material.

[0032] In one embodiment of the present invention: in step 1, N-isopropylacrylamide (NIPAM) is selected as the temperature-sensitive polymer, hydroxyethyl acrylate (HEA) is selected as the retarding functional group monomer, and N,N'-methylenebisacrylamide (MBA) is selected as the cross-linking agent. NIPAM, HEA and MBA are dissolved in deionized water at a ratio of 5:3:1 to obtain a reaction mixture, and 0.1 mol / L ammonium persulfate and 0.05 mol / L sodium bisulfite aqueous solutions are prepared respectively.

[0033] In one embodiment of the present invention: in step 1, the prepared aqueous solution is added dropwise to the reaction mixture at a rate of 1 mL / min-2 mL / min, the temperature is controlled at 30°C-40°C during the addition, and the mixture is stirred at a rate of 100 r / min-200 r / min. After the addition is completed, the reaction temperature is maintained and stirring is continued for 3h-5h. After the reaction is completed, the obtained polymer solution is naturally cooled to room temperature, and then the polymer solution is poured into anhydrous ethanol for precipitation, solid particles are precipitated from the polymer solution, and the solid particles are washed and dried to obtain a retarder with NIPAM.

[0034] In one embodiment of the present invention: in step 2, acrylic emulsion, polyurethane microemulsion and silicone emulsion are added to a high-speed stirrer in a ratio of 6:3:1, and stirred at a rate of 40r / min-60r / min for 10min-15min for premixing. At the same time, ammonia water is added to adjust the pH value of the mixed emulsion to 7-8, and stirring is continued for 5min-10min. Then, MBA accounting for 0.1%-0.5% of the total weight of the monomers in the acrylic emulsion is added, and stirring is continued for 30min-60min at a temperature of 40°C-50°C at a rate of 100r / min-120r / min for reaction. After the reaction is completed, the mixed emulsion is continued to be stirred at room temperature for 1h-2h for aging. After aging, the mixed emulsion is filtered and cleaned to obtain a composite aqueous interpenetrating network structure polymer emulsion.

[0035] In one embodiment of the present invention: in step three, magnesite is added into a calcining furnace and calcined at a temperature of 700°C-1000°C for 10h-30h, the calcined product is cooled to room temperature and added into a ball mill, the magnesite is crushed into 300-400 mesh using a 30mm-50mm steel ball to prepare light-burned magnesium oxide powder, the light-burned magnesium oxide powder is added into a magnesium chloride solution, and stirred at a rate of 30r / min-50r / min for 3min-5min to obtain a magnesium gelled slurry.

[0036] In one embodiment of the present invention: in step 4, cement, fine bone meal and coarse bone meal are added into a mixer, stirred at a rate of 100 r / min-150 r / min for 3 min-5 min to obtain a dry mix, the prepared magnesium cementitious slurry is added into the dry mix, and a retarder and a polymer emulsion are added, wherein the amount of the retarder is 0.1%-0.5% of the mass of magnesium oxide, and stirred at a rate of 200 r / min-300 r / min for 5 min-8 min to obtain a quick repair material.

[0037] In one embodiment of the present invention: in step 5, the emergency repair material is placed in a stirring pot, and clean water is added to the stirring pot, and stirred at a rate of 50r / min-80r / min for 1min-2min to form a uniform slurry, and the stirred slurry is poured into a truncated cone with an upper inner diameter of 70mm, a lower inner diameter of 80mm, and a height of 40mm, and the slurry surface is smoothed with a spatula so that the slurry surface is flush with the edge of the test mold, and the test mold filled with the slurry is placed in a standard curing box, and the standard curing box is filled with the slurry. The temperatures were set to 10℃2, 0℃, 30℃, 40℃, 50℃ and 60℃ respectively and tested independently. The time was recorded and a test was conducted every 5 minutes after 25 minutes. During the test, the initial setting test needle of the Vicat instrument was vertically inserted into the center of the slurry. The insertion depth of the test needle was 3mm-4mm from the bottom of the test mold. Then the test needle was relaxed and allowed to sink freely into the slurry. When it was observed that the test needle stopped sinking for 30s and the sinking depth was <1mm, the time recorded at this time was the initial setting time of the rapid repair material.

[0038] In one embodiment of the present invention: in step five, after the initial setting time is determined, the final setting test needle is replaced on the Vicat instrument, and the slurry is continued to be cured in the standard curing box. A test is performed every 15 minutes after 1h-2h after the initial setting, and the final setting test needle is vertically inserted into the center of the slurry. The insertion depth of the test needle is 0.5mm from the bottom of the test mold. When the test needle sinks into the slurry and no longer sinks, and the annular attachment on the test needle cannot leave any marks on the surface of the slurry, the time at this time is recorded, which is the final setting time of the quick repair material.

[0039] In one embodiment of the present invention: in step six, the surface color, agglomeration and stratification of the quick repair material after solidification are observed with the naked eye, the compressive strength of the quick repair material is tested using a pressure testing machine, the linear expansion coefficient of the quick repair material when the temperature changes is measured by a thermal expansion meter, the quick repair material is placed in an environment of 10°C, 20°C, 30°C, 40°C, 50°C and 60°C, and the physical state and mechanical property changes of the quick repair material are observed. After the quick repair material specimens are immersed in water for 24h-48h, the changes in the strength and quality indicators of the quick repair material are detected to evaluate its water resistance.

[0040] Example 1: Under low temperature environment, due to the stretching of PNIPAM chain segments, HEA functional groups can be fully exposed and react with cement hydration products, effectively delaying the hydration reaction of cement and playing a retarding effect. When the temperature rises above the critical solution temperature (for polymers) of PNIPAM, the PNIPAM chain segments shrink and aggregate, and some HEA functional groups are wrapped inside the polymer, and the retarding effect is weakened, thereby realizing the intelligent characteristic of automatically adjusting the retarding effect according to temperature changes. At the same time, the network structure formed by the cross-linking agent makes the retarder have good stability and operability, and can be evenly dispersed and play a role in building materials such as concrete.

[0041] Example 2: acrylic emulsion, polyurethane microemulsion and silicone emulsion are placed in a container with a high-speed stirrer at a volume ratio of 6:3:1, and premixed for 10 minutes under low-speed stirring to make the three emulsions initially evenly dispersed, and slowly drop ammonia water to adjust the pH value of the mixed emulsion to 7.5, which helps to improve the stability of the emulsion and prevent coagulation or stratification in the subsequent treatment process. The stirring speed can be appropriately increased to medium speed, and stirring is continued for 10 minutes to ensure that the pH value is uniform and stable. At this time, an appropriate amount of crosslinking agent N,N'-methylenebisacrylamide is added, and the amount of the crosslinking agent is 0.3% of the total mass of the monomers in the acrylic emulsion. The crosslinking agent is slowly added dropwise to the mixed emulsion, and the stirring speed is increased to high speed. The mixture is stirred for 40 minutes to allow the crosslinking reaction to proceed fully. During the crosslinking reaction, the temperature can be appropriately raised to 50°C to promote the reaction rate, but attention should be paid to temperature control to prevent the emulsion from demulsifying due to overheating. After the crosslinking reaction is completed, the mixed emulsion is stirred for 2 hours at room temperature for post-treatment and aging, which helps to further evenly disperse the various components in the system and eliminate possible tiny bubbles and inhomogeneities. The composite emulsion is then filtered through a 200-mesh filter to remove possible impurities or coagulants to obtain the final composite aqueous interpenetrating network structure polymer emulsion product.

[0042] Example 3: Cement, fine aggregate and coarse aggregate are added to a mixer, and dry mixed first. The mixture is stirred at a rate of 150 r / min for 3 min to evenly wrap the cement on the surface of the aggregate to form a uniform dry mixture. The prepared magnesium cementitious material slurry is slowly poured into the dry mixture of cement and aggregate, and the stirring is continued at a rate of 300 r / min. Additives such as retarders, reinforcing fibers and waterproofing agents are added, and the stirring is continued for 8 min to ensure that the components are fully mixed and uniform to form a composite material mixture with good workability. The composite material mixture is poured into a mold and compacted using a vibration table. The vibration time is 10 s to remove bubbles in the mixture and form the composite material. The molded specimen is demolded after curing for 24 hours in an environment with a temperature of 20±2°C and a relative humidity greater than 90%, and then continues to be cured under standard curing conditions to a specified age to ensure that the strength of the composite material is fully developed.

[0043] As attached Figure 1 As shown, by adding a temperature-sensitive retarder, a composite water-based interpenetrating network structure polymer emulsion and a magnesium gelling slurry into the rapid repair material, the operating time and molding strength of the rapid repair material at different temperatures can be improved.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

[0045] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The above contents are merely examples and explanations of the present invention. Various modifications or additions to the specific embodiments described or replacements in similar ways by technicians in the technical field shall fall within the protection scope of the present invention as long as they do not deviate from the invention or exceed the scope defined by the claims.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing an environmentally friendly water-based polymer rapid repair material, comprising preparing a retarder with temperature responsive characteristics, using multiple emulsions to prepare a composite water-based polymer emulsion, and adding a magnesium gelling material to prepare a rapid repair material, characterized in that: The specific steps for preparing the environmentally friendly water-based polymer rapid repair material are as follows: Step 1: introducing a temperature-sensitive polymer into the retarder to control the retarding effect of the retarder by temperature; Step 2: Based on acrylic emulsion, a polyurethane microemulsion phase and an organosilicon emulsion phase are introduced to prepare a composite aqueous interpenetrating network structure polymer emulsion; Step 3: using magnesia ore as a raw material to prepare a magnesium cementitious material; Step 4: Mixing the magnesium gelling material, the retarder and the polymer emulsion with the cement raw material to prepare a quick repair material; Step 5: Evaluate the solidification time of the quick repair material under different temperature conditions; Step 6: Conduct performance test on the solidified quick repair material.

2. The method for preparing an environmentally friendly water-based polymer rapid repair material according to claim 1, characterized in that: In the step 1, N-isopropylacrylamide (NIPAM) is selected as a temperature-sensitive polymer, hydroxyethyl acrylate (HEA) is selected as a retarding functional group monomer, and N,N'-methylenebisacrylamide (MBA) is selected as a cross-linking agent. NIPAM, HEA and MBA are dissolved in deionized water at a ratio of 5:3:1 to obtain a reaction mixture, and 0.1 mol / L ammonium persulfate and 0.05 mol / L sodium bisulfite aqueous solutions are prepared respectively.

3. The method for preparing an environmentally friendly water-based polymer rapid repair material according to claim 2, characterized in that: In the step 1, the prepared aqueous solution is added dropwise to the reaction mixture at a rate of 1 mL / min-2 mL / min, the temperature is controlled at 30°C-40°C during the addition, and the mixture is stirred at a rate of 100 r / min-200 r / min. After the addition is completed, the reaction temperature is maintained and stirring is continued for 3 h-5 h. After the reaction is completed, the obtained polymer solution is naturally cooled to room temperature, and then the polymer solution is poured into anhydrous ethanol for precipitation, solid particles are precipitated from the polymer solution, and the solid particles are washed and dried to obtain a retarder with NIPAM.

4. The method for preparing an environmentally friendly water-based polymer rapid repair material according to claim 2, characterized in that: In the step 2, acrylic emulsion, polyurethane microemulsion and silicone emulsion are added into a high-speed stirrer in a ratio of 6:3:1, and stirred at a rate of 40 r / min-60 r / min for 10 min-15 min for premixing. At the same time, ammonia water is added to adjust the pH value of the mixed emulsion to 7-8, and stirring is continued for 5 min-10 min. Then, MBA accounting for 0.1%-0.5% of the total weight of the monomers in the acrylic emulsion is added, and stirring is continued for 30 min-60 min at a temperature of 40° C.-50° C. and a rate of 100 r / min-120 r / min for reaction. After the reaction is completed, the mixed emulsion is continued to be stirred at room temperature for 1 h-2 h for aging. After aging, the mixed emulsion is filtered and cleaned to obtain a composite aqueous interpenetrating network structure polymer emulsion.

5. The method for preparing an environmentally friendly water-based polymer rapid repair material according to claim 1, characterized in that: In the step three, magnesite is added into a calcining furnace and calcined at a temperature of 700°C-1000°C for 10h-30h. The calcined product is cooled to room temperature and added into a ball mill. The magnesite is crushed into 300-400 meshes using a 30mm-50mm steel ball to prepare light-burned magnesium oxide powder. The light-burned magnesium oxide powder is added into a magnesium chloride solution and stirred at a rate of 30r / min-50r / min for 3min-5min to obtain a magnesium gelled slurry.

6. The method for preparing an environmentally friendly water-based polymer rapid repair material according to claim 5, characterized in that: In the step 4, cement, fine bone meal and coarse bone meal are added into a mixer, stirred at a rate of 100 r / min-150 r / min for 3 min-5 min to obtain a dry mix, the prepared magnesium cementitious slurry is added into the dry mix, and a retarder and a polymer emulsion are added, wherein the amount of the retarder is 0.1%-0.5% of the mass of magnesium oxide, and stirred at a rate of 200 r / min-300 r / min for 5 min-8 min to obtain a quick repair material.

7. The method for preparing an environmentally friendly water-based polymer rapid repair material according to claim 6, characterized in that: In the step 5, the emergency repair material is placed in a stirring pot, and clean water is added to the stirring pot, and stirred at a rate of 50r / min-80r / min for 1min-2min to form a uniform slurry, and the stirred slurry is poured into a truncated cone with an upper inner diameter of 70mm, a lower inner diameter of 80mm, and a height of 40mm. The slurry surface is smoothed with a spatula so that the slurry surface is flush with the edge of the test mold, and the test mold containing the slurry is placed in a standard curing box, and the temperature in the standard curing box is set to The temperatures are 10℃, 20℃, 30℃, 40℃, 50℃ and 60℃ and independent tests are carried out. Start recording the time. After 25 minutes, conduct a test every 5 minutes. During the test, insert the initial setting test needle of the Vicat instrument vertically into the center of the slurry. The insertion depth of the test needle is 3mm-4mm from the bottom of the test mold. Then relax the test needle and let it sink freely into the slurry. When it is observed that the test needle stops sinking for 30s and the sinking depth of the test needle is <1mm, the time recorded at this time is the initial setting time of the rapid repair material.

8. The method for preparing an environmentally friendly water-based polymer rapid repair material according to claim 7, characterized in that: In the step five, after the initial setting time is determined, the final setting test needle is replaced on the Vicat instrument, and the slurry is continued to be cured in the standard curing box. A test is performed every 15 minutes after 1h-2h after the initial setting. The final setting test needle is vertically inserted into the center of the slurry. The insertion depth of the test needle is 0.5mm from the bottom of the test mold. When the test needle sinks into the slurry and no longer sinks, and the annular attachment on the test needle cannot leave any marks on the slurry surface, the time at this time is recorded, which is the final setting time of the quick repair material.

9. The method for preparing an environmentally friendly water-based polymer rapid repair material according to claim 8, characterized in that: In the step six, the surface color, agglomeration and stratification of the solidified quick repair material are observed with the naked eye, the compressive strength of the quick repair material is tested using a pressure testing machine, the linear expansion coefficient of the quick repair material when the temperature changes is measured using a thermal expansion instrument, the quick repair material is placed in an environment of 10°C, 20°C, 30°C, 40°C, 50°C and 60°C, the physical state and mechanical property changes of the quick repair material are observed, and after the quick repair material specimens are immersed in water for 24h-48h, the changes in the strength and quality indicators of the quick repair material are detected to evaluate its water resistance.

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