Solid-liquid two-component high-fluid-state soil curing agent and preparation method thereof

Abstract

The invention belongs to the field of soil environment-friendly material curing, and relates to a solid-liquid two-component high-flow soil curing agent and a preparation method thereof. The solid-liquid two-component high-fluid soil curing agent is prepared from the following raw materials: a liquid component and a powder component, the liquid component comprises deionized water, a dispersing agent, a bonding stabilizer, a blocked isocyanate prepolymer microcapsule, a shrinkage reducing agent, hydroxypropyl methyl cellulose, triethanolamine and ethylenediamine tetraacetic acid; the powder component is prepared from a mineral admixture, a nano SiO2-Al2O3 compound, an expanding agent, sodium polyacrylate, micron-sized glass beads and hydroxypropyl methyl cellulose. The problems that in the prior art, the fluidity attenuation speed of the flow-state solidified soil is high, and the early strength is low are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of soil environmental protection material solidification, and relates to a solid-liquid two-component high-fluidity soil solidifying agent and a preparation method thereof. BACKGROUND

[0002] The fluidity solidified soil is a kind of engineering material with self-leveling property by adding a special solidifying agent to convert waste soil, silt or industrial solid waste (such as alkali residue, slag and fly ash, etc.) into engineering material. The core technical value lies in realizing the double breakthroughs of "zero pressure construction" and "in-situ resource utilization", effectively solving the problems of waste disposal difficulty, low construction efficiency and great environmental impact in traditional earthwork engineering. The material is formed by mixing waste soil, solidifying agent, water and other industrial by-products in a specific ratio to form a high-fluidity slurry, which can be pumped and poured and then coagulated into a solidified body with certain structural strength under natural conditions.

[0003] However, the existing fluidity solidified soil technology still has significant defects, which seriously limits its large-scale application in building engineering. At present, the industry generally uses inorganic cementing materials (such as cement and lime, etc.) as the main solidifying agent system. Although this kind of material has certain cementing ability, it is difficult to effectively control the rheological properties of the slurry. Specifically, the fluidity of the fluidity solidified soil will obviously decrease with the extension of the standing time, and after stirring, it usually needs to be poured within 1 to 2 hours, otherwise the pumping performance will decrease sharply, resulting in construction interruption or quality problems.

[0004] In addition, the traditional inorganic solidification system also has the problem of slow early strength development, which directly affects the construction period and structure forming efficiency, and is difficult to meet the requirements of modern building industry for rapid construction and strength development. The existing technology has not yet systematically solved the contradiction between the maintenance of fluidity and the coordinated improvement of early strength, which restricts the promotion of fluidity solidified soil in the fields of foundation backfilling, roadbed engineering and underground structure, etc. SUMMARY

[0005] In order to solve the problems of fast fluidity decay and low early strength of the existing fluidity solidified soil, the present application provides a solid-liquid two-component high-fluidity soil solidifying agent and a preparation method thereof.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: In a first aspect, the present application provides a solid-liquid two-component high-fluidity soil solidifying agent, the preparation raw materials of the solid-liquid two-component high-fluidity soil solidifying agent include 1 part of liquid component and 10 parts of powder component in terms of mass fraction ratio. The liquid component comprises deionized water 55-65 parts by mass, dispersant 7.0-12 parts, adhesion stabilizer 5.0-9.0 parts, blocked isocyanate prepolymer microcapsule 7.0-15.0 parts, shrinkage reducing agent 3.0-5.0 parts, hydroxypropyl methylcellulose 0.2-0.5 parts, triethanolamine 5.0-9.0 parts and ethylenediaminetetraacetic acid 1.0-2.0 parts by mass fraction; The powder component comprises mineral admixture 72-76 parts by mass, nano-SiO2-Al2O3 compound 0.5-1.5 parts, expansion agent 8-12 parts, sodium polyacrylate 0.4-0.8 parts, micron-sized glass microbeads 12 parts and hydroxypropyl methylcellulose 1.5-2.5 parts by mass fraction.

[0007] Preferably, the dispersant is aminopropyltriethoxysilane or glycidyl ether oxypropyltrimethoxysilane.

[0008] Preferably, the adhesion stabilizer is HEA-PEGDE secondary grafting modified chitosan.

[0009] Preferably, the shrinkage reducing agent comprises one or more of polyethylene glycol, polyethylene glycol monomethyl ether, methyl allyl polyoxyethylene ether and allyl alcohol polyoxyethylene ether.

[0010] Preferably, the ethylenediaminetetraacetic acid comprises one or both of disodium EDTA and tetrasodium EDTA.

[0011] Preferably, the mineral admixture comprises one or more of slag powder, silica fume, fly ash and coal gangue powder.

[0012] Preferably, when the mineral admixture is a mixture of the slag powder and the silica fume, the mass ratio of the slag powder to the silica fume is 20: (4-7).

[0013] Preferably, the expansion agent comprises one or more of calcium sulphoaluminate, calcium oxide, magnesium oxide and gypsum.

[0014] Preferably, when the expansion agent is a mixture of the calcium sulphoaluminate and the magnesium oxide, the mass ratio of the calcium sulphoaluminate to the magnesium oxide is (1-2): 1.

[0015] In a second aspect, the present application provides a preparation method of a solid-liquid two-component high-flow-state soil stabilizer, wherein the preparation method of the liquid component comprises: The deionized water is heated, triethanolamine is added to the deionized water and stirred until completely dissolved, then the shrinkage reducing agent and the ethylenediaminetetraacetic acid are added in sequence and stirred until a uniform solution is formed; The adhesion stabilizer is added dropwise to the uniform solution and ultrasonic emulsification and dispersion are performed; A dispersant and hydroxypropyl methylcellulose were added sequentially to the ultrasonically emulsified and dispersed solution, and the mixture was stirred to obtain a fluid with shear-thinning properties. The fluid is cooled down, and end-capped isocyanate prepolymer microcapsules are introduced into the fluid under negative pressure. The mixture is stirred and mixed evenly to obtain the liquid component. The preparation method of the powder component includes: Hydroxypropyl methylcellulose and nano-SiO2-Al2O3 composite were mixed, heated and stirred to obtain mixture A; Mixture A, mineral admixtures, expanding agent and sodium polyacrylate are mixed and stirred to obtain mixture B; Micron-sized glass beads were added to the mixture B, and the powder component was obtained after stirring.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The dispersant in the liquid component and sodium polyacrylate in the powder component work together through electrostatic repulsion and steric hindrance to ensure the slurry has extremely high initial fluidity and effectively prevent particle sedimentation and segregation. The binder stabilizer and hydroxypropyl methylcellulose synergistically construct a three-dimensional network structure, encapsulating free water and significantly improving the suspension stability and fluidity retention of the slurry over time. The end-capped isocyanate prepolymer microcapsules achieve a precise pH-triggered response, rapidly releasing active -NCO groups in the alkaline environment after casting to form a polyurea network, thereby endowing the solidified soil with excellent early strength. Ethylenediaminetetraacetic acid (EDTA) regulates the activity of metal ions in stages through chelation, avoiding fluidity loss caused by early ineffective reactions and providing a stable ion source for later strength development. The nano-SiO2-Al2O3 composite in the powder component acts as a highly active nucleation site to accelerate hydration and optimize the pore structure. It works synergistically with the expansion agent and micron-sized glass microspheres to effectively compensate for shrinkage and buffer internal stress, jointly ensuring the excellent volume stability and long-term durability of the solidified body. Detailed Implementation

[0017] To enable those skilled in the art to understand the features and effects of the present invention, the terms and expressions used in the specification and claims are explained and defined in general below. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning understood by those skilled in the art regarding the present invention, and in case of conflict, the definitions in this specification shall prevail.

[0018] The theories or mechanisms described and disclosed herein, whether right or wrong, should not in any way limit the scope of the invention, that is, the contents of the invention can be implemented without being limited by any particular theory or mechanism.

[0019] Herein, all features defined by a numerical range or a percentage range, such as numerical values, amounts, contents and concentrations, are only for the sake of brevity and convenience. Accordingly, the description of the numerical range or the percentage range should be considered to have encompassed and specifically disclosed all possible sub-ranges and individual numerical values within the range (including integers and fractions).

[0020] Herein, unless otherwise specified, "comprise", "include", "contain", "have" or similar terms are intended to cover the meaning of "consist of" and "consist essentially of", for example, "A comprises a" covers the meaning of "A comprises a and other" and "A comprises only a".

[0021] Herein, for the sake of brevity, all possible combinations of the technical features in the various embodiments or examples are not described. Accordingly, the technical features in the various embodiments or examples can be combined with each other as long as there is no contradiction, and all possible combinations should be considered as the scope of the present specification.

[0022] A first object of the present application is to provide a solid-liquid two-component high-fluidity soil stabilizer, raw materials for preparing the solid-liquid two-component high-fluidity soil stabilizer comprising 1 part of a liquid component and 10 parts of a powder component by mass fraction; The liquid component comprises deionized water 55 parts to 65 parts, a dispersing agent 7.0 parts to 12 parts, a coagulation stabilizer 5.0 parts to 9.0 parts, a blocked isocyanate prepolymer microcapsule 7.0 parts to 15.0 parts, a shrinkage reducing agent 3.0 parts to 5.0 parts, hydroxypropyl methylcellulose 0.2 parts to 0.5 parts, triethanolamine 5.0 parts to 9.0 parts, and ethylenediaminetetraacetic acid 1.0 parts to 2.0 parts by mass fraction; The powder component comprises mineral admixtures 72 parts to 76 parts, a nano-SiO2-Al2O3 composite 0.5 parts to 1.5 parts, an expansive agent 8 parts to 12 parts, sodium polyacrylate 0.4 parts to 0.8 parts, micro-sized glass microbeads 12 parts, and hydroxypropyl methylcellulose 1.5 parts to 2.5 parts by mass fraction.

[0023] The role of the liquid component is to instantaneously regulate, activate and initiate structure building. Among them, deionized water as a solvent provides a stable medium for the progress of various chemical reactions. The dispersant can effectively adsorb on the surface of soil particles, and through strong electrostatic repulsion and steric hindrance effect, it can disperse the flocculation structure of soil particles, making them fully dispersed and giving the slurry a very high initial fluidity. The binding stabilizer uses specially modified chitosan by secondary grafting, and its long molecular chain can quickly stretch in water, wrapping and fixing free water through hydrogen bonds and van der Waals forces to form a three-dimensional network structure, which not only effectively prevents the segregation and bleeding of the slurry, but also provides excellent suspension stability to the system, ensuring the time-dependent retention of fluidity. The blocked isocyanate prepolymer microcapsule wraps the highly active isocyanate (-NCO) group inside the microcapsule through a blocking agent, making it chemically inert at the beginning of stirring, avoiding the rapid increase in viscosity caused by premature reaction. Only after pouring, the microcapsule wall material in the alkaline environment is damaged, the blocking agent is unblocked, and the active -NCO group is precisely released, quickly reacting with the water and hydroxyl groups in the soil particles to form a polyurea network structure, thereby rapidly building early strength. The shrinkage reducing agent can reduce the capillary pore solution surface tension in the slurry, thereby reducing the capillary negative pressure generated during the drying and self-shrinkage process from the source, and can control early shrinkage and cracking. Hydroxypropyl methylcellulose further enhances the water retention and thickening effect, and the hydration film formed in water can reduce the water evaporation rate, working together with the binding stabilizer to ensure the workability of the system. Triethanolamine can accelerate the hydration reaction of inorganic cementitious materials and assist the dissolution of the stabilizer. Ethylenediaminetetraacetic acid can form stable soluble complexes with multivalent metal ions (such as Ca 2+ , Al 3+ ) in the soil and hydration products, inhibiting the chemical activity of these ions and preventing them from prematurely forming insoluble precipitates and destroying fluidity; then slowly release when the pH of the system changes or the ion concentration is adjusted, thereby delaying the participation in the hydration reaction, while avoiding the loss of fluidity and strength development obstacles caused by premature reaction.

[0024] The powder component provides long-term strength framework, compensates shrinkage and enhances durability. The mineral admixture is the strength basis of the system, and its active component reacts in alkaline environment to generate a cementitious product, which continuously fills the pores and densifies the structure to provide continuously growing later strength. The nano-SiO2-Al2O3 composite has extremely high specific surface area and reactivity, which can not only act as nucleation points to accelerate hydration reaction, but also fill in the micro-nano scale pores to optimize the pore structure and improve the density and mechanical properties of the solidified body. The expansion agent generates moderate expansion at a specific hydration age to offset the chemical shrinkage and drying shrinkage caused by hydration, drying and other factors. The sodium polyacrylate, as a high molecular polymer, can further enhance the repulsion between particles through the space steric effect of its long molecular chain, and cooperates with the dispersant in the liquid component to maintain excellent rheological properties and suspension stability of the slurry. The micron-sized glass microbeads, as inert microspheres, can improve the flowability by acting as "ball bearings" in the slurry, and can effectively buffer internal stress and reduce shrinkage due to their closed cavity structure. The hydroxypropyl methylcellulose is added in the powder to form a gradient dissolution with the same component in the liquid, ensuring continuous water-retention and thickening effect during the entire hydration process.

[0025] In summary, the present application combines the intervention of the liquid component on the reaction process and the reinforcement of the powder component on the final structure, so that the flowable solidified soil has high flowability, high early strength and long-term durability, and other key properties.

[0026] The deionized water has a resistivity (25℃) ≥18.2MΩ·cm, a turbidity ≤0.1NTU, and a pH value of 6.5-7.5 at 25℃. The present application uses high-purity deionized water as a solvent, which can completely eliminate the uncontrollable interference of common impurity ions (such as Ca 2+ , Mg 2+ , Cl - , etc.) in ordinary water on the complex chemical reaction of the system.

[0027] The dispersant is aminopropyltriethoxysilane or glycidyl ether oxypropyltrimethoxysilane. Such organosilane dispersants can not only form a firm covalent bond with the hydroxyl groups on the surface of the soil particles through the silanol groups (-Si-OH) generated after hydrolysis, significantly enhancing the interfacial adhesion between the solidified agent and the soil body, but also can construct an effective steric space barrier on the particle surface through the organic long chain in the molecule, thereby achieving excellent dispersion effect far beyond that of traditional dispersants.

[0028] The bonding stabilizer is a hydroxyethyl acrylate (HEA)-polyethylene glycol diglycidyl ether (PEGDE) secondary graft modified chitosan product, which is constructed by twice modification through a chemical grafting method to form a dense filling gel skeleton. The preparation method of the HEA-PEGDE secondary graft modified chitosan product comprises the following steps: The purified chitosan is dissolved in a 2% acetic acid aqueous solution according to a solid-liquid ratio of 1:20 (g:mL), and 30% hydroxyethyl acrylate by mass of the chitosan is added and stirred uniformly. Under the protection of nitrogen inert gas, the solution is stirred at 300 rpm in a constant temperature water bath at 60-65°C for 6-8 hours until the solution is transparent and uniform, to obtain a preliminary modified product. The preliminary modified product is dissolved in anhydrous ethanol solution according to a solid-liquid ratio of 1:25 (g:mL), and 25% polyethylene glycol glycidyl ether with a molecular weight of 400-1000 Da by mass of the preliminary modified product is added. The secondary graft reaction is carried out by stirring at 250 rpm in a constant temperature water bath at 70-75°C for 4-6 hours. After the reaction is completed, the product is poured into excess acetone for precipitation, and then washed repeatedly with anhydrous ethanol for 3-4 times. Finally, the product is dried in a vacuum drying oven at 60°C for 12 hours to obtain the HEA-PEGDE secondary graft modified chitosan.

[0029] The chitosan is prepared by using shrimp shells and crab shells as main raw materials, and has a degree of deacetylation greater than 80%, a molecular weight controlled in a range of 20-30 kDa, and a cold water solubility of ≥5%, so as to ensure good reaction activity and solubility. The modification process introduces different functional groups and flexible long chains into the chitosan molecular chain, significantly enhances the stretchability, complexing capacity and space stabilization effect in the water system, effectively wraps free water, inhibits particle segregation, and strengthens the three-dimensional gel network through covalent crosslinking to realize the dense filling of the pores, and finally improves the suspension stability, early structural strength and long-term durability of the solidified soil.

[0030] The capped isocyanate prepolymer microcapsule takes an aromatic MDI (diphenylmethane diisocyanate) based prepolymer as a core, and introduces a polyether type polyol (such as phenylpropylene-epoxy alkylene copolyether or polytetramethylene ether glycol) to enhance the intermolecular force, and a bisulfite is used as an end-capping agent, and a resin type is used as a wall material.

[0031] The preparation method of the microcapsule comprises: reacting isocyanate with polyol to generate end-NCO prepolymer under inert atmosphere, then performing end-capping reaction with sodium bisulfite at 60-80°C to obtain end-capped prepolymer, forming stable R-NHCO-SO3Na structure at room temperature to passivate-NCO activity; dispersing the end-capped prepolymer in an aqueous phase containing an emulsifier, dispersing into an emulsion by shearing, and introducing melamine-formaldehyde prepolymer for crosslinking polymerization, and finally obtaining end-capped isocyanate prepolymer microcapsule after filtration, washing and drying.

[0032] For example: under nitrogen inert atmosphere, aromatic MDI is mixed with polyether polyol at a molar ratio of 3:1, and the reaction is carried out at 70-75°C with 400 rpm stirring for 2h to generate prepolymer with end-NCO mass fraction of 10%-12%; then the prepolymer is cooled to 60-80°C, 15% mass fraction of sodium bisulfite aqueous solution is added according to the molar ratio of sodium bisulfite to end-NCO group of 1.1:1, and end-capping reaction is carried out at 500 rpm high speed stirring for 1.5-2h to obtain end-capped prepolymer, forming stable R-NHCO-SO3Na structure at room temperature to passivate-NCO activity; the end-capped prepolymer is mixed with deionized water at a mass ratio of 1:4, 0.8% Tween-80 emulsifier is added to the total mass of the system, and the oil-in-water emulsion is formed by high-speed shearing for 5min at 10000 rpm, the temperature of the emulsion is adjusted to 55-60°C, 8% melamine-formaldehyde prepolymer (molar ratio of melamine to formaldehyde 1:3) is added to the emulsion, the pH of the system is adjusted to 4.0-4.5 with 10% mass fraction of citric acid solution, and the crosslinking polymerization reaction is carried out at 55-60°C constant temperature stirring for 3-4h, after the reaction is completed, the product is filtered, washed with deionized water until neutral, and vacuum dried at 50°C for 10h, finally the end-capped isocyanate prepolymer microcapsule with particle size of 50-100μm is obtained after filtration, washing and drying.

[0033] The microcapsule realizes precise response triggered by pH: in alkaline environment (pH>11), the wall material gradually hydrolyzes, the end-capping group is dissociated by OH - The active-NCO groups are rapidly released and react with water or hydroxyl components in the soil, and the polyurea network structure is rapidly formed within 60-90 minutes, thereby significantly improving the early strength of the cured soil.

[0034] The shrinkage reducing agent includes one or more of polyethylene glycol, polyethylene glycol monomethyl ether, methyl allyl polyethylene glycol ether, and allyl alcohol polyethylene glycol ether. Such polyether shrinkage reducing agents have a molecular structure containing a large number of ether bonds (-O-) and hydroxyl groups (-OH), which can effectively reduce the surface tension of capillary water in the cured soil pores. Through this mechanism, they can significantly weaken the negative pressure generated by the loss of water in capillary pores during cement hydration and water evaporation, thereby reducing the plastic shrinkage and drying shrinkage of the material from the root.

[0035] The hydroxypropyl methyl cellulose in the liquid component is selected from a medium viscosity grade and has a particle fineness of 80-100 mesh. Its finer particle size ensures rapid dispersion and hydration in the mixing water, quickly forming a uniform water-retaining network throughout the paste. The medium viscosity characteristics can effectively thicken to prevent particle settling and bleeding, but also avoid excessive viscosity that hinders flow, thereby significantly reducing the risk of early cracking caused by water evaporation during the initial stage of construction, and providing a stable water environment for the full reaction of other components.

[0036] The triethanolamine requires a purity of more than 90%, and high-purity triethanolamine can effectively avoid the uncontrollable interference of impurities (such as monoethanolamine, diethanolamine, or residual alkali) in low-purity products on the complex chemical reactions of the system.

[0037] The ethylenediaminetetraacetic acid includes one or both of EDTA disodium salt and EDTA tetrasodium salt. Such substances, with their strong chelating ability, can form stable water-soluble complexes with multivalent metal ions (such as Ca 2+ , Mg 2+ , Al 3+ ) in the early stages of hydration, thereby achieving precise control over ion activity in stages. This action effectively prevents the premature formation of insoluble precipitates or the consumption of metal ions in ineffective hydration, significantly alleviating the loss of fluidity over time and ensuring the required workability time. As the hydration process progresses and the pH of the system changes, these complexed ions can be slowly released to participate in subsequent hydration reactions as effective supplementary components, generating cementitious substances that enhance strength, avoiding the strength development obstacles caused by early ion consumption, and thereby synergistically optimizing the overall performance of the cured soil from the construction period to the hardened period.

[0038] The mineral admixture includes one or more of slag powder, silica fume powder, fly ash, and coal gangue powder, and when the mineral admixture is a mixture of slag powder and silica fume powder, the mass ratio of the slag powder to the silica fume powder is 20: (4-7), and the fineness is S95.

[0039] The nano-SiO2-Al2O3 composite is a core-shell structure formed by SiO2 coating Al2O3, and the specific surface area is controlled at 400-450 m 2The particle size distribution is 50-100 nm, and the surface potential is less than -30 mV. The composite greatly improves the reaction activity by high specific surface area, and the core-shell structure and the significantly negative surface potential can effectively enhance the electrostatic repulsion between particles, prevent agglomeration and flocculation, and improve the particle dispersion, thereby significantly reducing the system viscosity and optimizing the slurry rheological property.

[0040] The expansion agent includes one or more of calcium sulphoaluminate, calcium oxide, magnesium oxide and gypsum, and when the expansion agent is a mixture of calcium sulphoaluminate and magnesium oxide, the mass ratio of the calcium sulphoaluminate and the magnesium oxide is (1-2):1, and the light-burned magnesium oxide used has an iodine adsorption activity value of 60-150 s. The calcium sulphoaluminate hydrates rapidly, can generate ettringite in the early stage to produce moderate expansion, and effectively compensates for the chemical shrinkage in the plastic stage; and the light-burned magnesium oxide has high activity, and the volume expansion process of magnesium hydroxide (Mg(OH)2) generated by hydration is relatively slow and continuous, and can further compensate for the dry shrinkage in the middle stage. The two achieve the connection and superposition of the expansion process through proportion optimization, avoid the problems of excessive expansion of a single component in the early stage or insufficient expansion in the later stage, thereby significantly improving the volume stability of the solidified body and effectively preventing cracking, and the use of high-activity light-burned magnesium oxide also ensures the full play of the expansion effect.

[0041] The sodium polyacrylate is preferably a white powder with high solid content, and the molecular weight is controlled between 30 million and 50 million. The high-molecular polymer can fully stretch in the system due to its ultra-long molecular chain structure, effectively prevents the sedimentation and flocculation of solid particles through strong steric hindrance effect, significantly improves the suspension stability of the slurry, and thereby ensures the uniformity and workability of the flowable solidified soil during the construction period.

[0042] The micron-sized glass microbeads are a kind of hollow, closed spherical micron-sized inorganic particles, and the unique "ball bearing" effect can effectively reduce the friction between particles, significantly improve the rheological property of the slurry and improve the initial fluidity; in addition, as a rigid microsphere, it can be uniformly dispersed in the system, buffer the internal stress caused by hydration shrinkage or temperature change, and reduce the generation of internal microcracks.

[0043] The hydroxypropyl methylcellulose in the powder component is preferably a low-temperature gel type, and the methoxyl content thereof is controlled in a specific range of 22%-30%. Such cellulose ether can form a more dense hydration film before the hydration heat release of the system (i.e. at a lower temperature), which can effectively bind free water. As the hydration process consumes water in the liquid phase, the HPMC in the powder component is gradually released and dissolved, continuously supplementing the water-retention system weakened by water consumption, and significantly improving the water-retention performance of the system, thereby long-acting reducing the risk of plastic shrinkage and surface cracking.

[0044] The second object of the present application is to provide a preparation method of a solid-liquid two-component high-fluidity soil stabilizer, the preparation method of the liquid component comprising: The deionized water is heated to 40-60℃, triethanolamine is added into the deionized water and stirred until completely dissolved, then the shrinkage reducing agent and ethylenediaminetetraacetic acid are sequentially added, and stirred until a uniform solution is formed; The binding stabilizer is added dropwise into the uniform solution, and ultrasonic emulsification and dispersion are carried out at 15-50 kHz until a light blue color is presented; The dispersant and hydroxypropyl methyl cellulose are sequentially added into the solution after ultrasonic emulsification and dispersion, and stirring is carried out at a speed of 500-1000 rpm for 10-20 min to obtain a fluid with shear thinning characteristics; The fluid is cooled to 0-10℃, the blocked isocyanate prepolymer microcapsules are introduced into the fluid under a negative pressure environment, and stirring is carried out at a speed of 100-300 rpm for 20-30 min until uniform mixing is achieved, to obtain the liquid component.

[0045] The preparation of the liquid component first preheats and dissolves triethanolamine to provide a stable alkaline environment for the subsequent reaction; the progressive feeding and ultrasonic emulsification make the hydrophobic binding stabilizer form a uniform and stable colloidal dispersion, effectively playing the key role of "wrapping free water and constructing a three-dimensional network"; the shear stirring makes the organosilane dispersant and hydroxypropyl methyl cellulose fully interact, and optimizes the slurry rheology; finally, the blocked isocyanate microcapsules are introduced under low temperature and negative pressure conditions, which maximizes the avoidance of unintended reactions caused by premature capsule rupture, ensuring the storage stability of the product and the precise triggering of the rapid curing effect during construction.

[0046] The preparation method of the powder component comprises: The hydroxypropyl methyl cellulose and the nano-SiO2-Al2O3 composite are mixed and coated, and stirring is carried out at a speed of 1000-2000 rpm for 20-30 min at 80-120℃ to prevent the hydration and agglomeration of the nano-materials, to obtain a mixture A; The mixture A, the mineral admixture, the expansive agent and the sodium polyacrylate are mixed, and stirring is carried out at a speed of 50-100 rpm for 10-15 min to obtain a mixture B; the micron-sized glass microbeads are added into the mixture B, and stirring is carried out at a speed of 50-100 rpm for 20-30 min to obtain the powder component.

[0047] The preparation of the powder component first carries out organic coating treatment on the nano SiO2-Al2O3 composite, which effectively inhibits the hydration of the surface hydroxyl and the agglomeration tendency between particles under heating and shearing, and significantly improves the dispersibility and reactivity of the nano material in the system; then through the hierarchical mixing strategy, the mineral admixture, the expanding agent and the sodium polyacrylate and other dry powder materials are uniformly mixed in sequence, ensuring the homogeneity and batch stability of the functional component distribution; finally, the micron-sized glass microbeads are introduced at low speed, avoiding the damage of the hollow microbeads caused by mechanical shearing, and perfectly retaining the ball lubrication effect and stress buffering function of the hollow microbeads.

[0048] To sum up, the present application effectively solves the material compatibility contradiction through the mechanism complementation of the powder and liquid two-component system. The present application jointly acts from three dimensions of electrostatic repulsion, steric hindrance and reduction of particle viscosity to provide excellent high fluidity. Specifically, the sodium polyacrylate prevents flocculation through side chain steric hindrance and electrostatic repulsion, improves the rheological property, the nano SiO2-Al2O3 adsorbs between particles to form a sliding layer, the organic silicon penetrates the gap between particles to form a hydrophobic film, and the viscosity of soil particles is reduced, while the water retention property of hydroxypropyl methyl cellulose and the polyether shrinkage reducing agent cooperatively improve the fluidity; in the early stage of reaction, the four-tooth ligand structure of EDTA 4- periodically fixes and releases Ca 2+ , Mg 2+ , Al 3+ and other metal ions, wraps the metal ions in the cavity to prevent contact with active groups, forms a soluble complex salt, avoids precipitation, and participates in hydration in the later stage to avoid loss of fluidity and strength; the hydrogen bond water film formed by hydroxypropyl methyl cellulose reduces the water evaporation rate, the polyether shrinkage reducing agent, hollow glass microbeads and expanding agent control the volume stability, the -NCO released by the microcapsule reacts with water to generate polyurea filler and CO2, CO2 converts Ca 2+ into high solid volume CaCO3, hollow glass microbeads buffer the shrinkage stress and at the same time assist in storing CO2, further repairing the cracks of internal hydration reaction, calcium sulfoaluminate and magnesium oxide compensate for dry shrinkage by delayed expansion, ensuring the volume stability in the later stage. In addition, the present application solves the coexistence problem of chitosan and isocyanate prepolymer in the preparation process. On the one hand, the alkaline environment provided by triethanolamine promotes the dissolution of chitosan and regulates the dissolution rate of ions in the system, laying a foundation for subsequent reactions. On the other hand, the active groups (-NCO) in the isocyanate prepolymer react with water and hydroxyl groups after pouring, quickly generating a polyurea structure, which gives the cured body early strength within 1-3 hours. At the same time, the dissolved chitosan molecular chain not only wraps free water through a three-dimensional network to inhibit segregation, but also covalently reacts with the nano SiO2-Al2O3 composite to slowly form a dense gel grid to fill the pores, thereby ensuring the long-term durability and soil toughness of the cured body.

[0049] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0050] The following examples use instruments and equipment conventional in the art. Experimental methods in the following examples, unless otherwise specified, are generally performed under conventional conditions or as recommended by the manufacturer. All raw materials used in the following examples are conventional commercially available products with specifications conventional in the art. In this specification and the following examples, unless otherwise specified, "%" refers to weight percentage, "parts" refers to parts by weight, and "ratio" refers to weight proportion.

[0051] Example 1 1. Preparation of liquid components Weigh out the following components by weight: 55.0 parts deionized water, 7.0 parts aminopropyltriethoxysilane, 5.0 parts HEA-PEGDE secondary grafted modified chitosan with a molecular weight of 400, 7.0 parts end-capped isocyanate prepolymer microcapsules, 3.0 parts polyethylene glycol, 0.2 parts hydroxypropyl methylcellulose, 5.0 parts triethanolamine, and 1.0 part disodium EDTA. Heat deionized water to 40°C, add triethanolamine to the deionized water and stir until completely dissolved, then add polyethylene glycol and disodium EDTA in sequence and stir until a clear and homogeneous solution is formed. 20% by mass of HEA-PEGDE secondary grafted modified chitosan was added dropwise to a homogeneous solution per minute, and the solution was ultrasonically emulsified and dispersed at 15 kHz until it turned light blue. Aminopropyltriethoxysilane and hydroxypropyl methylcellulose were added sequentially to the ultrasonically emulsified and dispersed solution, and the mixture was stirred at 500 rpm for 10 min to obtain a fluid with shear-thinning properties. The fluid was cooled to 10°C in an ice bath, and end-capped isocyanate prepolymer microcapsules were introduced into the fluid under negative pressure. The mixture was stirred at 100 rpm for 20 minutes until homogeneous to obtain the liquid component.

[0052] 2. Preparation of powder components Weigh out the following components by mass ratio: 72 parts slag powder, 0.5 parts nano-SiO2-Al2O3 composite, 8 parts calcium sulfoaluminate, 0.4 parts sodium polyacrylate, 12 parts micron-sized glass microspheres, and 1.5 parts hydroxypropyl methylcellulose. Mixing hydroxypropyl methylcellulose and nano-SiO2-Al2O3 compound for coating, stirring at 80℃ and 1000 rpm for 20 min to obtain mixture A; Mixing mixture A, slag powder, calcium sulphoaluminate and sodium polyacrylate, stirring at 50 rpm for 15 min to obtain mixture B; adding micro glass beads to mixture B, stirring at 50 rpm for 30 min to obtain the powder component.

[0053] 3. Implementation process According to the mass fraction, 100 parts of dry soil (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 Portland cement, 0.2 parts of liquid component, and 2 parts of powder component are weighed and mixed to prepare a solid-liquid dual-component high-fluidity solidified soil.

[0054] Example 2 1. Preparation of liquid component According to the mass fraction, 65.0 parts of deionized water, 12.0 parts of aminopropyl triethoxysilane, 9.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 15.0 parts of blocked isocyanate pre-polymer microcapsule, 5.0 parts of polyethylene glycol monomethyl ether, 0.5 parts of hydroxypropyl methylcellulose, 9.0 parts of triethanolamine, and 2.0 parts of EDTA tetrasodium salt are weighed and mixed to prepare the liquid component. The deionized water is heated to 50℃, and the triethanolamine is added to the deionized water and stirred until completely dissolved. Then, the polyethylene glycol monomethyl ether and the EDTA tetrasodium salt are added in sequence, and stirred until a transparent and uniform solution is formed. The HEA-PEGDE secondary graft modified chitosan with a mass fraction of 20% is added to the uniform solution at a rate of 20% per minute, and ultrasonic emulsification and dispersion are performed at 25 kHz until a light blue color is obtained. The aminopropyl triethoxysilane and the hydroxypropyl methylcellulose are added in sequence to the solution after ultrasonic emulsification and dispersion, and stirring is performed at 750 rpm for 15 min to obtain a fluid with shear thinning properties. The fluid is cooled to 0℃ by ice bath cooling, and the blocked isocyanate pre-polymer microcapsule is introduced into the fluid under negative pressure, and stirring is performed at 200 rpm for 25 min until the mixture is uniform, to obtain the liquid component.

[0055] 2. Preparation of powder component According to the mass fraction, 76 parts of silica powder, 1.5 parts of nano-SiO2-Al2O3 compound, 12 parts of calcium oxide, 0.8 parts of sodium polyacrylate, 12 parts of micro glass beads, and 2.5 parts of hydroxypropyl methylcellulose are weighed and mixed to prepare the powder component. Mixing hydroxypropyl methylcellulose and nano-SiO2-Al2O3 compound for coating, stirring at 100℃ and 1500 rpm for 25 min to obtain mixture A; Mixing mixture A, silica fume, calcium oxide and sodium polyacrylate, after stirring at 100 rpm for 10 min, mixture B is obtained; adding micro glass beads to mixture B, after stirring at 100 rpm for 20 min, the powder component is obtained.

[0056] 3. Implementation process According to the mass fraction, 100 parts of dry soil (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 silicate cement, 0.2 parts of liquid component, and 2 parts of powder component are weighed and mixed to prepare a solid-liquid double-component high-fluidity solidified soil.

[0057] Example 3 1. Preparation of liquid component According to the mass fraction, 55.0 parts of deionized water, 12.0 parts of aminopropyl triethoxysilane, 9.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 15.0 parts of blocked isocyanate pre-polymer microcapsule, 5.0 parts of methyl allyl polyoxyethylene ether, 0.2 parts of hydroxypropyl methyl cellulose, 5.0 parts of triethanolamine, and 1.5 parts of EDTA disodium salt are weighed and mixed to prepare the liquid component. The deionized water is heated to 60℃, and the triethanolamine is added to the deionized water and stirred until completely dissolved. Then the methyl allyl polyoxyethylene ether and the EDTA disodium salt are added in sequence, and the mixture is stirred until a transparent and uniform solution is formed. The HEA-PEGDE secondary graft modified chitosan with a mass of 20% is added to the uniform solution at a rate of 20% per minute, and ultrasonic emulsification and dispersion are carried out at 35 kHz until a light blue color is obtained. The aminopropyl triethoxysilane and the hydroxypropyl methyl cellulose are added to the solution after ultrasonic emulsification and dispersion in sequence, and the mixture is stirred at 1000 rpm for 20 min to obtain a fluid with shear thinning properties. The fluid is cooled to 5℃ in an ice bath, and the blocked isocyanate pre-polymer microcapsule is introduced into the fluid under negative pressure, and the mixture is stirred at 300 rpm for 30 min until it is uniformly mixed, and the liquid component is obtained.

[0058] 2. Preparation of powder component According to the mass fraction, 72 parts of fly ash, 1.5 parts of nano-SiO2-Al2O3 composite, 12 parts of magnesium oxide, 0.8 parts of sodium polyacrylate, 12 parts of micro glass beads, and 1.5 parts of hydroxypropyl methyl cellulose are weighed and mixed to prepare the powder component. The hydroxypropyl methyl cellulose and the nano-SiO2-Al2O3 composite are mixed and coated, and the mixture is stirred at 120℃ and 2000 rpm for 30 min to obtain mixture A. Mixing mixture A, fly ash, magnesium oxide and sodium polyacrylate, after stirring at 75 rpm for 12 min, mixture B is obtained; adding micron glass beads to mixture B, after stirring at 75 rpm for 25 min, the powder component is obtained.

[0059] 3. Implementation process According to the mass fraction, 100 parts of dry soil (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 silicate cement, 0.2 parts of liquid component, and 2 parts of powder component are weighed and mixed to prepare a solid-liquid double-component high-fluidity solidified soil.

[0060] Example 4 1. Preparation of liquid component According to the mass fraction, 65.0 parts of deionized water, 7.0 parts of aminopropyl triethoxysilane, 6.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 8.0 parts of blocked isocyanate pre-polymer microcapsule, 3.0 parts of allyl alcohol polyoxyethylene ether, 0.5 parts of hydroxypropyl methyl cellulose, 9.0 parts of triethanolamine, and 1.0 parts of EDTA disodium salt are weighed and mixed to prepare the liquid component. Heat the deionized water to 40℃, add triethanolamine to the deionized water and stir until completely dissolved, then add allyl alcohol polyoxyethylene ether and EDTA disodium salt in turn, and stir until a transparent and uniform solution is formed; Add 20% of HEA-PEGDE secondary graft modified chitosan to the uniform solution every minute, and perform ultrasonic emulsification and dispersion at 45 kHz until a light blue color is presented; Add aminopropyl triethoxysilane and hydroxypropyl methyl cellulose to the solution after ultrasonic emulsification and dispersion in turn, and stir at 500 rpm for 10 min to obtain a fluid with shear thinning properties; Cool the fluid to 10℃ in an ice bath, introduce blocked isocyanate pre-polymer microcapsule into the fluid under negative pressure, and stir at 100 rpm for 20 min until the mixture is uniform, to obtain the liquid component.

[0061] 2. Preparation of powder component According to the mass fraction, 76 parts of coal gangue powder, 0.5 parts of nano SiO2-Al2O3 composite, 8 parts of gypsum, 0.4 parts of sodium polyacrylate, 12 parts of micron glass beads, and 2.5 parts of hydroxypropyl methyl cellulose are weighed and mixed to prepare the powder component. Mix the hydroxypropyl methyl cellulose and nano SiO2-Al2O3 composite to coat, and stir at 80℃ and 1000 rpm for 20 min to obtain mixture A; Mixing mixture A, coal gangue powder, gypsum and sodium polyacrylate, after stirring at 50 rpm for 15 min, mixture B is obtained; adding micron-sized glass microbeads to mixture B, after stirring at 50 rpm for 30 min, the powder component is obtained.

[0062] 3. Implementation process According to the mass fraction, 100 parts of dry soil (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 silicate cement, 0.2 parts of the liquid component, and 2 parts of the powder component are weighed and mixed to prepare the solid-liquid dual-component high-fluidity solidified soil.

[0063] Example 5 1. Preparation of the liquid component According to the mass fraction, 60.0 parts of deionized water, 10.0 parts of aminopropyl triethoxysilane, 7.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 10.0 parts of a blocked isocyanate prepolymer microcapsule, 2.0 parts of polyethylene glycol, 2.0 parts of polyethylene glycol monomethyl ether, 0.5 parts of hydroxypropyl methyl cellulose, 7.5 parts of triethanolamine, 0.5 parts of disodium EDTA salt, and 1.0 parts of tetrasodium EDTA salt are weighed. The deionized water is heated to 40℃, and the triethanolamine is added to the deionized water and stirred until completely dissolved. Then, the polyethylene glycol, polyethylene glycol monomethyl ether, disodium EDTA salt, and tetrasodium EDTA salt are added in sequence, and stirred until a transparent and uniform solution is formed. To the uniform solution, 20% of the HEA-PEGDE secondary graft modified chitosan is added every minute, and ultrasonic emulsification and dispersion are carried out at 50 kHz until a light blue color is presented. To the solution after ultrasonic emulsification and dispersion, aminopropyl triethoxysilane and hydroxypropyl methyl cellulose are added in sequence, and after stirring at 500 rpm for 10 min, a fluid with shear thinning properties is obtained. The fluid is cooled to 10℃ in an ice bath, and the blocked isocyanate prepolymer microcapsule is introduced into the fluid under negative pressure, and stirred at 100 rpm for 20 min until uniform mixing is achieved, and the liquid component is obtained.

[0064] 2. Preparation of the powder component According to the mass fraction, 60 parts of slag powder, 12 parts of silica fume, 1.0 parts of nano-SiO2-Al2O3 composite, 6 parts of calcium sulfoaluminate, 6 parts of magnesium oxide, 0.6 parts of sodium polyacrylate, 12 parts of micron-sized glass microbeads, and 2.0 parts of hydroxypropyl methyl cellulose are weighed and mixed. The hydroxypropyl methyl cellulose and nano-SiO2-Al2O3 composite are mixed and coated, and stirred at 80℃ and 1000 rpm for 20 min to obtain mixture A. Mixing mixture A, slag powder, silica powder, calcium sulphoaluminate, magnesium oxide and sodium polyacrylate to obtain mixture B after stirring at 50 rpm for 15 min; adding micro glass beads to mixture B to obtain the powder component after stirring at 50 rpm for 30 min.

[0065] 3. Implementation process According to the mass fraction, 100 parts of dry soil (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 Portland cement, 0.2 parts of the liquid component, and 2 parts of the powder component are weighed and mixed to prepare a solid-liquid dual-component high-fluidity solidified soil.

[0066] Example 6 1. Preparation of the liquid component According to the mass fraction, 55.0 parts of deionized water, 8.5 parts of glycidyl ether oxypropyl trimethoxysilane, 6.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 8.0 parts of blocked isocyanate prepolymer microcapsule, 1.0 part of polyethylene glycol, 2.5 parts of methyl allyl polyoxyethylene ether, 0.3 parts of hydroxypropyl methyl cellulose, 6.0 parts of triethanolamine, and 1.2 parts of EDTA disodium salt are weighed. The deionized water is heated to 40℃, and the triethanolamine is added to the deionized water and stirred until completely dissolved. Then, the polyethylene glycol, methyl allyl polyoxyethylene ether, and EDTA disodium salt are added in sequence, and stirred until a transparent and uniform solution is formed. To the uniform solution, 20% of the HEA-PEGDE secondary graft modified chitosan is added every minute, and ultrasonic emulsification and dispersion are carried out at 15 kHz until a light blue color is presented. To the solution after ultrasonic emulsification and dispersion, glycidyl ether oxypropyl trimethoxysilane and hydroxypropyl methyl cellulose are added in sequence, and stirring is carried out at 500 rpm for 10 min to obtain a fluid with shear thinning properties. The fluid is cooled to 10℃ in an ice bath, and the blocked isocyanate prepolymer microcapsule is introduced into the fluid under negative pressure, and stirring is carried out at 100 rpm for 20 min until the mixture is uniform, to obtain the liquid component.

[0067] 2. Preparation of the powder component According to the mass fraction, 56 parts of slag powder, 19.6 parts of silica powder, 0.8 parts of nano-SiO2-Al2O3 composite, 6 parts of calcium sulphoaluminate, 3 parts of magnesium oxide, 0.5 parts of sodium polyacrylate, 12 parts of micro glass beads, and 2.5 parts of hydroxypropyl methyl cellulose are weighed. The hydroxypropyl methyl cellulose and nano-SiO2-Al2O3 composite are mixed and coated, and stirring is carried out at 80℃ and 1000 rpm for 20 min to obtain mixture A. Mixing mixture A, slag powder, silica powder, calcium sulphoaluminate, magnesium oxide and sodium polyacrylate to obtain mixture B after stirring at 50 rpm for 15 min; adding micro glass beads to mixture B to obtain the powder component after stirring at 50 rpm for 30 min.

[0068] 3. Implementation process According to the mass fraction, 100 parts of dry soil (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 Portland cement, 0.2 parts of the liquid component, and 2 parts of the powder component are weighed and mixed to prepare a solid-liquid dual-component high-fluidity solidified soil.

[0069] Example 7 1. Preparation of the liquid component According to the mass fraction, 65.0 parts of deionized water, 10.5 parts of aminopropyl triethoxysilane, 8.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 12.0 parts of a blocked isocyanate prepolymer microcapsule, 2.0 parts of polyethylene glycol, 2.5 parts of allyl alcohol polyoxyethylene ether, 0.4 parts of hydroxypropyl methyl cellulose, 8.0 parts of triethanolamine, and 1.8 parts of EDTA disodium salt are weighed. The deionized water is heated to 40℃, and the triethanolamine is added to the deionized water and stirred until completely dissolved. Then, the polyethylene glycol, allyl alcohol polyoxyethylene ether, and EDTA disodium salt are added in sequence, and stirred until a transparent and uniform solution is formed. The HEA-PEGDE secondary graft modified chitosan is added to the uniform solution at a rate of 20% mass per minute, and ultrasonic emulsification and dispersion are performed at 15 kHz until a light blue color is obtained. The aminopropyl triethoxysilane and hydroxypropyl methyl cellulose are added to the solution after ultrasonic emulsification and dispersion in sequence, and stirring is performed at 500 rpm for 10 min to obtain a fluid with shear thinning properties. The fluid is cooled to 10℃ in an ice bath, and the blocked isocyanate prepolymer microcapsule is introduced into the fluid under negative pressure, and stirring is performed at 100 rpm for 20 min until the mixture is uniform, and the liquid component is obtained.

[0070] 2. Preparation of the powder component According to the mass fraction, 36 parts of slag powder, 40 parts of coal gangue powder, 1.2 parts of nano SiO2-Al2O3 composite, 5 parts of calcium sulphoaluminate, 6 parts of gypsum, 0.7 parts of sodium polyacrylate, 12 parts of micro glass beads, and 1.5 parts of hydroxypropyl methyl cellulose are weighed. The hydroxypropyl methyl cellulose and nano SiO2-Al2O3 composite are mixed and coated, and stirring is performed at 80℃ and 1000 rpm for 20 min to obtain mixture A. Mixing mixture A, slag powder, coal gangue powder, calcium sulphoaluminate, gypsum and sodium polyacrylate to obtain mixture B after stirring at 50 rpm for 15 min; adding micro glass beads to mixture B to obtain the powder component after stirring at 50 rpm for 30 min.

[0071] 3. Implementation process According to the mass fraction, 100 parts of dry soil (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 Portland cement, 0.2 parts of the liquid component, and 2 parts of the powder component are weighed and mixed to prepare a solid-liquid dual-component high-fluidity solidified soil.

[0072] Example 8 1. Preparation of the liquid component According to the mass fraction, 58.0 parts of deionized water, 7.0 parts of aminopropyl triethoxysilane, 5.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 15.0 parts of a blocked isocyanate prepolymer microcapsule, 2.0 parts of polyethylene glycol monomethyl ether, 3.0 parts of methyl allyl polyoxyethylene ether, 0.5 parts of hydroxypropyl methyl cellulose, 9.0 parts of triethanolamine, and 1.5 parts of EDTA tetrasodium salt are weighed. The deionized water is heated to 40℃, and the triethanolamine is added to the deionized water and stirred until completely dissolved. Then, the polyethylene glycol monomethyl ether, the methyl allyl polyoxyethylene ether, and the EDTA tetrasodium salt are added in sequence, and the mixture is stirred until a transparent and uniform solution is formed. The HEA-PEGDE secondary graft modified chitosan with a mass of 20% is added to the uniform solution at a rate of 20% per minute, and ultrasonic emulsification and dispersion are performed at 15 kHz until a light blue color is obtained. The aminopropyl triethoxysilane and the hydroxypropyl methyl cellulose are added to the solution after ultrasonic emulsification and dispersion in sequence, and the mixture is stirred at 500 rpm for 10 min to obtain a fluid with shear thinning properties. The fluid is cooled to 10℃ in an ice bath, and the blocked isocyanate prepolymer microcapsule is introduced into the fluid under negative pressure, and the mixture is stirred at 100 rpm for 20 min until it is uniformly mixed, and the liquid component is obtained.

[0073] 2. Preparation of the powder component According to the mass fraction, 40 parts of silica fume, 33 parts of fly ash, 0.5 parts of nano-SiO2-Al2O3 composite, 2 parts of calcium oxide, 10 parts of magnesium oxide, 0.8 parts of sodium polyacrylate, 12 parts of micro glass beads, and 1.7 parts of hydroxypropyl methyl cellulose are weighed and mixed to obtain mixture A. The hydroxypropyl methyl cellulose and the nano-SiO2-Al2O3 composite are mixed and coated, and the mixture is stirred at 80℃ and 1000 rpm for 20 min to obtain mixture A. Mixing mixture A, silica fume, fly ash, calcium oxide, magnesium oxide and sodium polyacrylate, after stirring at 50 rpm for 15 min, mixture B is obtained; adding micron glass beads to mixture B, after stirring at 50 rpm for 30 min, the powder component is obtained.

[0074] 3. Implementation process According to the mass fraction, 100 parts of dry soil (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 Portland cement, 0.2 parts of the liquid component, and 2 parts of the powder component are weighed and mixed to prepare the solid-liquid dual-component high-fluidity solidified soil.

[0075] Example 9 1. Preparation of the liquid component According to the mass fraction, 62.0 parts of deionized water, 12.0 parts of aminopropyl triethoxysilane, 9.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 7.0 parts of a blocked isocyanate prepolymer microcapsule, 1.5 parts of polyethylene glycol monomethyl ether, 1.5 parts of allyl alcohol polyoxyethylene ether, 0.2 parts of hydroxypropyl methyl cellulose, 5.0 parts of triethanolamine, and 1.8 parts of EDTA tetrasodium salt are weighed. The deionized water is heated to 40℃, and the triethanolamine is added to the deionized water and stirred until completely dissolved. Then, the polyethylene glycol monomethyl ether, the allyl alcohol polyoxyethylene ether, and the EDTA tetrasodium salt are added in sequence, and stirred until a transparent and uniform solution is formed. To the uniform solution, 20% of the HEA-PEGDE secondary graft modified chitosan is added every minute, and ultrasonic emulsification and dispersion are carried out at 15 kHz until a light blue color is presented. To the solution after ultrasonic emulsification and dispersion, the aminopropyl triethoxysilane and the hydroxypropyl methyl cellulose are added in sequence, and after stirring at 500 rpm for 10 min, a fluid with shear thinning properties is obtained. The fluid is cooled to 10℃ in an ice bath, and the blocked isocyanate prepolymer microcapsule is introduced into the fluid under negative pressure, and stirred at 100 rpm for 20 min until evenly mixed, and the liquid component is obtained.

[0076] 2. Preparation of the powder component According to the mass fraction, 35 parts of silica fume, 40 parts of coal gangue powder, 1.5 parts of nano-SiO2-Al2O3 composite, 2 parts of calcium oxide, 6 parts of gypsum, 0.4 parts of sodium polyacrylate, 12 parts of micron glass beads, and 2.1 parts of hydroxypropyl methyl cellulose are weighed. The hydroxypropyl methyl cellulose and the nano-SiO2-Al2O3 composite are mixed and coated, and stirred at 80℃ and 1000 rpm for 20 min to obtain mixture A. Mixing mixture A, silica fume, coal gangue powder, calcium oxide, gypsum and sodium polyacrylate, after stirring at 50 rpm for 15 min, mixture B is obtained; adding micro glass beads to mixture B, after stirring at 50 rpm for 30 min, the powder component is obtained.

[0077] 3. Implementation process According to the mass fraction, 100 parts of dry clay (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 silicate cement, 0.2 parts of liquid component, and 2 parts of powder component are weighed and mixed to prepare a solid-liquid dual-component high-fluidity solidified soil.

[0078] Example 10 1. Preparation of liquid component According to the mass fraction, 55.0 parts of deionized water, 9.0 parts of aminopropyl triethoxysilane, 7.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 11.0 parts of capped isocyanate pre-polymer microcapsule, 1.0 parts of methyl allyl polyoxyethylene ether, 3.0 parts of allyl alcohol polyoxyethylene ether, 0.4 parts of hydroxypropyl methyl cellulose, 8.0 parts of triethanolamine, 0.6 parts of disodium EDTA salt, and 1.0 parts of tetrasodium EDTA salt are weighed and mixed. The deionized water is heated to 40℃, and the triethanolamine is added to the deionized water and stirred until completely dissolved. Then, the methyl allyl polyoxyethylene ether, the allyl alcohol polyoxyethylene ether, the disodium EDTA salt, and the tetrasodium EDTA salt are added in sequence, and stirred until a transparent and uniform solution is formed. To the uniform solution, 20% of the HEA-PEGDE secondary graft modified chitosan is added dropwise per minute, and ultrasonic emulsification and dispersion are carried out at 15 kHz until a light blue color is presented. To the solution after ultrasonic emulsification and dispersion, the aminopropyl triethoxysilane and the hydroxypropyl methyl cellulose are added in sequence, and after stirring at 500 rpm for 10 min, a fluid with shear thinning properties is obtained. The fluid is cooled to 10℃ in an ice bath, and the capped isocyanate pre-polymer microcapsule is introduced into the fluid under negative pressure, and stirred at 100 rpm for 20 min until evenly mixed, to obtain the liquid component.

[0079] 2. Preparation of powder component According to the mass fraction, 50 parts of fly ash, 22 parts of coal gangue powder, 1.0 parts of nano-SiO2-Al2O3 composite, 5.5 parts of magnesium oxide, 5 parts of gypsum, 0.6 parts of sodium polyacrylate, 12 parts of micron glass beads, and 2.5 parts of hydroxypropyl methyl cellulose are weighed and mixed. The hydroxypropyl methyl cellulose and the nano-SiO2-Al2O3 composite are mixed and coated, and stirred at 80℃ and 1000 rpm for 20 min to obtain mixture A. Mixing mixture A, fly ash, coal gangue powder, magnesium oxide, gypsum and sodium polyacrylate to obtain mixture B after stirring at 50 rpm for 15 min; adding micron-sized glass beads to mixture B to obtain the powder component after stirring at 50 rpm for 30 min.

[0080] 3. Implementation process According to the mass fraction, 100 parts of dry soil (which needs to pass through a 5 mm sieve), 45 parts of water, 6 parts of PO42.5 Portland cement, 0.2 parts of the liquid component, and 2 parts of the powder component are weighed and mixed to prepare a solid-liquid dual-component high-fluidity solidified soil.

[0081] Example 11 1. Preparation of the liquid component According to the mass fraction, 65.0 parts of deionized water, 8.0 parts of glycidyl ether oxypropyltrimethoxysilane, 6.0 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 9.0 parts of blocked isocyanate prepolymer microcapsule, 1.0 part of polyethylene glycol, 1.0 part of polyethylene glycol monomethyl ether, 1.5 parts of methyl allyl polyoxyethylene ether, 0.3 parts of hydroxypropyl methyl cellulose, 6.5 parts of triethanolamine, 0.5 parts of disodium EDTA salt, and 1.2 parts of tetrasodium EDTA salt are weighed. Heat the deionized water to 40℃, add triethanolamine to the deionized water and stir until completely dissolved, then add polyethylene glycol, polyethylene glycol monomethyl ether, methyl allyl polyoxyethylene ether, disodium EDTA salt, and tetrasodium EDTA salt in sequence, and stir until a transparent and uniform solution is formed. To the uniform solution, 20% of the HEA-PEGDE secondary graft modified chitosan is added every minute, and ultrasonic emulsification and dispersion are carried out at 15 kHz until a light blue color is presented. To the solution after ultrasonic emulsification and dispersion, glycidyl ether oxypropyltrimethoxysilane and hydroxypropyl methyl cellulose are added in sequence, and a fluid with shear thinning properties is obtained after stirring at 500 rpm for 10 min. Cool the fluid to 10℃ in an ice bath, introduce the blocked isocyanate prepolymer microcapsule into the fluid in a negative pressure environment, and stir at 100 rpm for 20 min until the mixture is uniform, to obtain the liquid component.

[0082] 2. Preparation of the powder component According to the mass fraction, 26 parts of slag powder, 25 parts of silica fume, 25 parts of fly ash, 1.0 part of nano-SiO2-Al2O3 composite, 5.5 parts of calcium oxide, 4 parts of magnesium oxide, 0.5 parts of sodium polyacrylate, 12 parts of micron-sized glass beads, and 2.0 parts of hydroxypropyl methyl cellulose are weighed and mixed to obtain the powder component. Hydroxypropyl methylcellulose and nano-SiO2-Al2O3 composite were mixed and coated, and stirred at 80℃ and 1000rpm for 20min to obtain mixture A; Mixture A, slag powder, silica fume, fly ash, calcium oxide, magnesium oxide and sodium polyacrylate are mixed and stirred at 50 rpm for 15 min to obtain mixture B; micron-sized glass microspheres are added to mixture B and stirred at 50 rpm for 30 min to obtain the powder component.

[0083] 3. Implementation process Weigh 100 parts of dry soil (which needs to pass through a 5mm sieve), 45 parts of water, 6 parts of PO42.5 silicate cement, 0.2 parts of liquid component, and 2 parts of powder component according to the mass ratio, and mix them to prepare a solid-liquid two-component high-fluidity solidified soil.

[0084] Example 12 1. Preparation of liquid components Weigh out the following components by weight: 57.0 parts deionized water, 12.0 parts glycidyl etheroxypropyltrimethoxysilane, 5.0 parts HEA-PEGDE secondary grafted modified chitosan with a molecular weight of 400, 13.0 parts end-capped isocyanate prepolymer microcapsules, 1.0 part polyethylene glycol, 1.0 part polyethylene glycol monomethyl ether, 3.0 parts allyl alcohol polyoxyethylene ether, 0.5 parts hydroxypropyl methylcellulose, 7.0 parts triethanolamine, 0.5 parts disodium EDTA, and 0.5 parts tetrasodium EDTA. Heat deionized water to 40°C, add triethanolamine to the deionized water and stir until completely dissolved, then add polyethylene glycol, polyethylene glycol monomethyl ether, allyl alcohol polyoxyethylene ether, disodium EDTA and tetrasodium EDTA in sequence, and stir until a transparent and homogeneous solution is formed. Add 20% by mass of HEA-PEGDE secondary grafted modified chitosan to a homogeneous solution every minute, and then ultrasonically emulsify and disperse the mixture at 15 kHz until it turns pale blue. Glycidyl etheroxypropyltrimethoxysilane and hydroxypropyl methylcellulose were added sequentially to the ultrasonically emulsified and dispersed solution, and the mixture was stirred at 500 rpm for 10 min to obtain a fluid with shear-thinning properties. The fluid was cooled to 10°C in an ice bath, and end-capped isocyanate prepolymer microcapsules were introduced into the fluid under negative pressure. The mixture was stirred at 100 rpm for 20 minutes until homogeneous to obtain the liquid component.

[0085] 2. Preparation of powder components Take 25 parts of slag powder, 25 parts of silica powder, 24.5 parts of coal gangue powder, 0.5 parts of nano SiO2-Al2O3 composite, 3 parts of calcium sulfoaluminate, 3 parts of calcium oxide, 5 parts of gypsum, 0.7 parts of sodium polyacrylate, 12 parts of micron glass beads, and 1.3 parts of hydroxypropyl methyl cellulose by mass fraction; Mix the hydroxypropyl methyl cellulose and the nano SiO2-Al2O3 composite for coating, stir at 80℃ and 1000rpm for 20min to obtain mixture A; Mix mixture A, slag powder, silica powder, coal gangue powder, calcium sulfoaluminate, calcium oxide, gypsum and sodium polyacrylate, stir at 50rpm for 15min to obtain mixture B; add micron glass beads to mixture B, stir at 50rpm for 30min to obtain the powder component.

[0086] 3. Implementation process Take 100 parts of dry soil (need to pass 5mm sieve), 45 parts of water, 6 parts of PO42.5 Portland cement, 0.2 parts of liquid component, and 2 parts of powder component by mass fraction, mix to prepare solid-liquid dual-component high-fluidity solidified soil.

[0087] Example 13 1. Preparation of liquid component Take 63.0 parts of deionized water, 7.0 parts of glycidyl ether oxypropyl trimethoxysilane, 9.0 parts of HEA-PEGDE secondary grafting modified chitosan with a molecular weight of 400, 14.0 parts of blocked isocyanate prepolymer microcapsule, 1.0 parts of polyethylene glycol monomethyl ether, 1.0 parts of methyl allyl polyoxyethylene ether, 1.0 parts of allyl alcohol polyoxyethylene ether, 0.2 parts of hydroxypropyl methyl cellulose, 8.5 parts of triethanolamine, and 1.3 parts of EDTA tetrasodium salt by mass fraction; Heat the deionized water to 40℃, add triethanolamine to the deionized water and stir until completely dissolved, then add polyethylene glycol monomethyl ether, methyl allyl polyoxyethylene ether, allyl alcohol polyoxyethylene ether, and EDTA tetrasodium salt in sequence, and stir until a transparent and uniform solution is formed; Add 20% of HEA-PEGDE secondary grafting modified chitosan to the uniform solution every minute, and perform ultrasonic emulsification and dispersion at 15kHz until a light blue color is presented; Add glycidyl ether oxypropyl trimethoxysilane and hydroxypropyl methyl cellulose to the solution after ultrasonic emulsification and dispersion in sequence, and stir at 500rpm for 10min to obtain a fluid with shear thinning properties; Cool the fluid to 10℃ in an ice bath, introduce blocked isocyanate prepolymer microcapsule into the fluid in a negative pressure environment, and stir at 100rpm for 20min until uniform mixing is achieved, to obtain the liquid component.

[0088] 2. Preparation of the powder component Silica fume 25 parts, fly ash 25 parts, coal gangue powder 23.5 parts, nano-SiO2-Al2O3 composite 1.5 parts, calcium oxide 2.5 parts, magnesium oxide 3 parts, gypsum 3 parts, polyacrylic acid sodium 0.4 parts, micron glass beads 12 parts, hydroxypropyl methyl cellulose 2.1 parts were weighed according to the mass fraction ratio; The hydroxypropyl methyl cellulose and the nano-SiO2-Al2O3 composite were mixed for coating, and stirring was carried out at 80℃ and 1000 rpm for 20 min to obtain mixture A; The mixture A, silica fume, fly ash, coal gangue powder, calcium oxide, magnesium oxide, gypsum and polyacrylic acid sodium were mixed, and stirring was carried out at 50 rpm for 15 min to obtain mixture B; the micron glass beads were added to the mixture B, and stirring was carried out at 50 rpm for 30 min to obtain the powder component.

[0089] 3. Implementation process 100 parts of dry soil (which needs to pass through a 5mm sieve), 45 parts of water, 6 parts of PO42.5 silicate cement, 0.2 parts of the liquid component, and 2 parts of the powder component were weighed according to the mass fraction ratio, and mixed to prepare a solid-liquid dual-component high-fluidity solidified soil.

[0090] Example 14 1. Preparation of the liquid component Deionized water 55.0 parts, glycidyl ether oxypropyl trimethoxysilane 11.0 parts, HEA-PEGDE secondary grafting modified chitosan with a molecular weight of 400 8.5 parts, blocked isocyanate prepolymer microcapsule 10.0 parts, polyethylene glycol 1.0 parts, polyethylene glycol monomethyl ether 1.0 parts, methyl allyl polyoxyethylene ether 1.0 parts, allyl alcohol polyoxyethylene ether 1.5 parts, hydroxypropyl methyl cellulose 0.35 parts, triethanolamine 9.0 parts, EDTA disodium salt 0.65 parts, EDTA tetrasodium salt 1.0 parts were weighed according to the mass fraction ratio. The deionized water was heated to 40℃, and the triethanolamine was added to the deionized water and stirred until completely dissolved, and then the polyethylene glycol, polyethylene glycol monomethyl ether, methyl allyl polyoxyethylene ether, allyl alcohol polyoxyethylene ether, EDTA disodium salt, and EDTA tetrasodium salt were sequentially added, and stirring was carried out until a transparent and uniform solution was formed; The HEA-PEGDE secondary grafting modified chitosan was added to the uniform solution at a rate of 20% mass per minute, and ultrasonic emulsification dispersion was carried out at 15 kHz until a light blue color appeared; The glycidyl ether oxypropyl trimethoxysilane and the hydroxypropyl methyl cellulose were sequentially added to the solution after ultrasonic emulsification dispersion, and stirring was carried out at 500 rpm for 10 min to obtain a fluid with shear thinning properties; The fluid is cooled to 10℃ in a fluid ice bath, and the capped isocyanate prepolymer microcapsules are introduced into the fluid under negative pressure, and stirred at 100 rpm for 20 min until mixed evenly, to obtain the liquid component.

[0091] 2. Preparation of the powder component The following components are weighed according to the mass fraction ratio: 22.5 parts of slag powder, 10 parts of silica fume powder, 10 parts of fly ash, 30 parts of coal gangue powder, 1.2 parts of nano-SiO2-Al2O3 composite, 3 parts of calcium sulfoaluminate, 3 parts of calcium oxide, 3 parts of magnesium oxide, 3 parts of gypsum, 0.8 parts of sodium polyacrylate, 12 parts of micron glass beads, and 1.5 parts of hydroxypropyl methyl cellulose. The hydroxypropyl methyl cellulose and the nano-SiO2-Al2O3 composite are mixed and coated, and stirred at 80℃ and 1000 rpm for 20 min to obtain mixture A. The mixture A, slag powder, silica fume powder, fly ash, coal gangue powder, calcium sulfoaluminate, calcium oxide, magnesium oxide, gypsum, and sodium polyacrylate are mixed, and stirred at 50 rpm for 15 min to obtain mixture B. The micron glass beads are added to the mixture B, and stirred at 50 rpm for 30 min to obtain the powder component.

[0092] 3. Implementation process The following components are weighed according to the mass fraction ratio: 100 parts of dry soil (which needs to pass through a 5mm sieve), 45 parts of water, 6 parts of PO42.5 Portland cement, 0.2 parts of the liquid component, and 2 parts of the powder component, which are mixed to prepare a solid-liquid dual-component high-fluidity solidified soil.

[0093] Example 15 1. Preparation of the liquid component The following components are weighed according to the mass fraction ratio: 65.0 parts of deionized water, 8.5 parts of glycidyl ether oxypropyl trimethoxysilane, 5.5 parts of HEA-PEGDE secondary graft modified chitosan with a molecular weight of 400, 8.5 parts of capped isocyanate prepolymer microcapsules, 0.8 parts of polyethylene glycol, 0.8 parts of polyethylene glycol monomethyl ether, 0.8 parts of methyl allyl polyoxyethylene ether, 0.8 parts of allyl alcohol polyoxyethylene ether, 0.25 parts of hydroxypropyl methyl cellulose, 5.5 parts of triethanolamine, 0.55 parts of disodium EDTA salt, and 1.0 parts of tetrasodium EDTA salt. The deionized water is heated to 40℃, and the triethanolamine is added to the deionized water and stirred until completely dissolved. Then, the polyethylene glycol, polyethylene glycol monomethyl ether, methyl allyl polyoxyethylene ether, allyl alcohol polyoxyethylene ether, disodium EDTA salt, and tetrasodium EDTA salt are added in sequence, and stirred until a transparent and uniform solution is formed. The HEA-PEGDE secondary graft modified chitosan is added to the uniform solution at a rate of 20% of the mass per minute, and ultrasonic emulsification and dispersion are performed at 15 kHz until a light blue color is presented. To the solution after ultrasonic emulsification and dispersion, glycidyl ether oxypropyl trimethoxysilane and hydroxypropyl methyl cellulose were added in turn, and after stirring at 500 rpm for 10 min, a fluid with shear thinning property was obtained; The fluid was cooled to 10℃ in an ice bath, and the capped isocyanate prepolymer microcapsules were introduced into the fluid under negative pressure, and stirred at 100 rpm for 20 min until uniform mixing, to obtain the liquid component.

[0094] 2. Preparation of the powder component The slag powder 56 parts, silica powder 19.6 parts, nano-SiO2-Al2O3 composite 0.7 parts, calcium sulfoaluminate 4 parts, magnesium oxide 4 parts, polyacrylic acid sodium 0.5 parts, micron glass microspheres 12 parts, and hydroxypropyl methyl cellulose 2.2 parts were weighed according to the mass fraction ratio; The hydroxypropyl methyl cellulose and nano-SiO2-Al2O3 composite were mixed and coated, and stirred at 80℃ and 1000 rpm for 20 min to obtain mixture A; The mixture A, slag powder, silica powder, calcium sulfoaluminate, magnesium oxide and polyacrylic acid sodium were mixed, and stirred at 50 rpm for 15 min to obtain mixture B; the micron glass microspheres were added to the mixture B, and stirred at 50 rpm for 30 min to obtain the powder component.

[0095] 3. Implementation process 100 parts of dry soil (which needs to pass through a 5mm sieve), 45 parts of water, 6 parts of PO42.5 Portland cement, 0.2 parts of the liquid component, and 2 parts of the powder component were weighed according to the mass fraction ratio, and mixed to prepare a solid-liquid dual-component high-fluidity solidified soil.

[0096] The solid-liquid dual-component high-fluidity solidified soil prepared in Examples 1-15 was tested for performance, and the results are shown in Table 1: Table 1 Performance test results of the solid-liquid dual-component high-fluidity solidified soil of Examples 1-15

[0097] According to the performance test results of Examples 1-15, the solid-liquid dual-component high-fluidity solidified soil system performs excellently in terms of fluidity and strength development. The initial fluidity generally reaches 200-285mm, showing good pumpability and self-leveling ability; at the same time, the 1-day unconfined compressive strength can reach 0.122-0.197MPa, and the 7-day strength is further improved to 0.271-0.455MPa, indicating that the system can maintain high fluidity while achieving rapid early strength development and stable later strength growth, effectively solving the common problems of rapid fluidity decay and low early strength of the fluidity solidified soil.

[0098] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A solid-liquid two-component high-fluidity soil stabilizer, characterized in that, The raw materials for preparing the solid-liquid two-component high-fluidity soil stabilizer include 1 part liquid component and 10 parts powder component by mass ratio; The liquid components, by mass percentage, include 55-65 parts deionized water, 7.0-12 parts dispersant, 5.0-9.0 parts binder stabilizer, 7.0-15.0 parts end-capped isocyanate prepolymer microcapsules, 3.0-5.0 parts shrinkage reducer, 0.2-0.5 parts hydroxypropyl methylcellulose, 5.0-9.0 parts triethanolamine, and 1.0-2.0 parts ethylenediaminetetraacetic acid. The powder components, by mass percentage, include 72-76 parts of mineral admixture, 0.5-1.5 parts of nano-SiO2-Al2O3 composite, 8-12 parts of expanding agent, 0.4-0.8 parts of sodium polyacrylate, 12 parts of micron-sized glass microspheres, and 1.5-2.5 parts of hydroxypropyl methylcellulose.

2. The solid-liquid two-component high-fluidity soil stabilizer according to claim 1, characterized in that, The dispersant is aminopropyltriethoxysilane or glycidoxypropyltrimethoxysilane.

3. The solid-liquid two-component high-fluidity soil stabilizer according to claim 1, characterized in that, The adhesive stabilizer is a HEA-PEGDE secondary grafted modified chitosan.

4. The solid-liquid two-component high-fluidity soil stabilizer according to claim 1, characterized in that, The shrinkage reducing agent includes one or more of polyethylene glycol, polyethylene glycol monomethyl ether, methyl allyl polyoxyethylene ether, and allyl alcohol polyoxyethylene ether.

5. The solid-liquid two-component high-fluidity soil stabilizer according to claim 1, characterized in that, The ethylenediaminetetraacetic acid includes one or both of EDTA disodium salt and EDTA tetrasodium salt.

6. The solid-liquid two-component high-fluidity soil stabilizer according to claim 1, characterized in that, The mineral admixture includes one or more of the following: slag powder, silica fume, fly ash, and coal gangue powder.

7. The solid-liquid two-component high-fluidity soil stabilizer according to claim 6, characterized in that, When the mineral admixture is a mixture of slag powder and silica fume, the mass ratio of slag powder to silica fume is 20:(4~7).

8. The solid-liquid two-component high-fluidity soil stabilizer according to claim 1, characterized in that, The expanding agent includes one or more of calcium sulfoaluminate, calcium oxide, magnesium oxide, and gypsum.

9. A solid-liquid two-component high-fluidity soil stabilizer according to claim 8, characterized in that, When the expanding agent is a mixture of calcium sulfoaluminate and magnesium oxide, the mass ratio of calcium sulfoaluminate to magnesium oxide is (1~2):

1.

10. A method for preparing a solid-liquid two-component high-fluidity soil stabilizer according to any one of claims 1 to 9, characterized in that, The method for preparing the liquid component includes: Heat deionized water, add triethanolamine to the deionized water and stir until completely dissolved, then add shrinkage reducing agent and ethylenediaminetetraacetic acid in sequence, and stir until a homogeneous solution is formed; A binder stabilizer is added dropwise to the homogeneous solution, followed by ultrasonic emulsification and dispersion. A dispersant and hydroxypropyl methylcellulose were added sequentially to the ultrasonically emulsified and dispersed solution, and the mixture was stirred to obtain a fluid with shear-thinning properties. The fluid is cooled down, and end-capped isocyanate prepolymer microcapsules are introduced into the fluid under negative pressure. The mixture is stirred and mixed evenly to obtain the liquid component. The preparation method of the powder component includes: Hydroxypropyl methylcellulose and nano-SiO2-Al2O3 composite were mixed, heated and stirred to obtain mixture A; Mixture A, mineral admixtures, expanding agent and sodium polyacrylate are mixed and stirred to obtain mixture B; Micron-sized glass beads were added to the mixture B, and the powder component was obtained after stirring.

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