CN116161937B - Temperature-responsive in-situ polymerization modified composite grouting material and preparation method thereof - Google Patents
Temperature-responsive in-situ polymerization modified composite grouting material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 134
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 108
- 238000006116 polymerization reaction Methods 0.000 title claims abstract description 56
- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 69
- 238000003756 stirring Methods 0.000 claims abstract description 66
- 238000002156 mixing Methods 0.000 claims abstract description 54
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000004132 cross linking Methods 0.000 claims abstract description 35
- 239000011259 mixed solution Substances 0.000 claims abstract description 35
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 22
- 239000000292 calcium oxide Substances 0.000 claims abstract description 22
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 22
- 239000010440 gypsum Substances 0.000 claims abstract description 22
- 239000000243 solution Substances 0.000 claims abstract description 18
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000003469 silicate cement Substances 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- 238000005303 weighing Methods 0.000 claims description 26
- TUZBYYLVVXPEMA-UHFFFAOYSA-N butyl prop-2-enoate;styrene Chemical compound C=CC1=CC=CC=C1.CCCCOC(=O)C=C TUZBYYLVVXPEMA-UHFFFAOYSA-N 0.000 claims description 21
- RWOSATAYZLTNOV-UHFFFAOYSA-N 2-methylbuta-1,3-diene;2-methylprop-2-enoic acid Chemical compound CC(=C)C=C.CC(=C)C(O)=O RWOSATAYZLTNOV-UHFFFAOYSA-N 0.000 claims description 20
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 17
- BDSYEKLSEKMQDH-UHFFFAOYSA-N ethyl(phenyl)carbamodithioic acid Chemical compound CCN(C(S)=S)C1=CC=CC=C1 BDSYEKLSEKMQDH-UHFFFAOYSA-N 0.000 claims description 16
- IRZFQKXEKAODTJ-UHFFFAOYSA-M sodium;propan-2-yloxymethanedithioate Chemical compound [Na+].CC(C)OC([S-])=S IRZFQKXEKAODTJ-UHFFFAOYSA-M 0.000 claims description 16
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims description 15
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 15
- 229940047670 sodium acrylate Drugs 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 7
- 238000010907 mechanical stirring Methods 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 2
- 125000001425 triazolyl group Chemical group 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 30
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 27
- 239000008367 deionised water Substances 0.000 description 15
- 229910021641 deionized water Inorganic materials 0.000 description 15
- 238000011056 performance test Methods 0.000 description 13
- -1 triazole dimercaptoamine salt Chemical class 0.000 description 12
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 239000011398 Portland cement Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 230000036571 hydration Effects 0.000 description 7
- 238000006703 hydration reaction Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000051 modifying effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application provides a temperature-responsive in-situ polymerization modified composite grouting material and a preparation method thereof, wherein the grouting material comprises the following components in parts by weight: 86-95 parts of silicate cement clinker, 13-19 parts of gypsum, 1-5 parts of quicklime, 5-8 parts of active mixture, 0.2-0.5 part of in-situ crosslinking agent and 0.1-0.3 part of in-situ crosslinking accelerator. And adding the prepared active mixed solution into the grouting base material solution, adding the in-situ crosslinking agent and the in-situ crosslinking accelerator, and uniformly stirring and mixing to obtain the temperature-responsive in-situ polymerization modified composite grouting material. The temperature-responsive in-situ polymerization modified composite grouting material prepared by the application can form a chemical bond with a coal interface in situ, fully exert high bonding strength determined by a covalent bond, effectively increase the bonding force between the grouting material and an organic coal interface, improve the grouting reinforcement effect of the grouting material, and fully exert the advantages of low price, simple process and good bonding effect of an inorganic grouting material.
Description
Technical Field
The application relates to the technical field of mining materials, in particular to a temperature response type in-situ polymerization modified composite grouting material and a preparation method thereof.
Background
Coal is a main energy source in China, the exploitation of coal resources plays a role in China, the coal resources with the burial depth of less than 1000m in China are very abundant, the coal resources are mainly distributed in middle eastern regions in China, and most of the coal in the regions enter deep exploitation. Coal mining depths are also deepened downward at 8-12m per year. In order to ensure the energy supply balance of the fast development of the middle and eastern economy, the deep coal development is a main way for realizing the stable supply of the future coal energy in China, and has important strategic significance for guaranteeing the national energy safety and supporting the economic development
Compared with shallow coal mines, the roadway surrounding rock with deep complex conditions has the problems that continuous deformation, integral movement of the surrounding rock, softening of coal rock, closing of cracks and poor permeability of the surrounding rock can occur under the superposition effect of high ground stress and strong mining, the existing organic grouting material has the problems of high price, environmental pollution, easy aging and the like, the inorganic grouting material is difficult to inject into the surrounding rock, the bonding strength of an interface between the inorganic grouting material and a coal body is low, and the grouting modification effect is not ideal.
In order to improve the interfacial adhesion strength between the inorganic grouting and the coal body, modification has been carried out by adding an organic polymer, but the addition of an organic polymer greatly increases the viscosity of the slurry, reduces the fluidity and the permeability, and has limited modifying effect.
Accordingly, there is a need to provide a solution for a novel modified inorganic grouting material that addresses the above-mentioned deficiencies.
Disclosure of Invention
The application aims to provide a temperature-responsive in-situ polymerization modified composite grouting material and a preparation method thereof, which are used for solving the problem that the bonding strength of the interface between the conventional inorganic grouting material and a coal body cannot meet the requirement.
In one aspect, the embodiment of the application provides a temperature-responsive in-situ polymerization modified composite grouting material, which comprises the following components in parts by weight: 86-95 parts (such as 86 parts, 88 parts, 90 parts, 92 parts and 94 parts) of silicate cement clinker, 13-19 parts (such as 14 parts, 16 parts and 18 parts) of gypsum, 1-5 parts (such as 2 parts and 4 parts) of quicklime, 5-8 parts (such as 5 parts, 6 parts, 7 parts and 8 parts) of active mixture, 0.2-0.5 part (such as 0.2 part, 0.3 part, 0.4 part and 0.5 part) of in-situ crosslinking agent and 0.1-0.3 part (such as 0.1 part, 0.2 part and 0.3 part) of in-situ crosslinking accelerator. The driving heat of the in-situ crosslinking reaction is the hydration heat of the cement clinker.
In the prior art, the organic grouting material has the problems of high price, environmental pollution, easy aging and the like, and the inorganic grouting material has the common problem of weak acting force with the molecules of the organic coal body. Therefore, the strong interface bonding and high-reactivity temperature-driven in-situ polymerization modified inorganic grouting material is developed, the strength of the interface transition region between the inorganic grouting material and the coal body can be remarkably improved, and the problem that the bonding strength of the interface between the conventional inorganic grouting material and the coal body cannot meet the requirement is solved.
In some embodiments, the reactive mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid, sodium acrylate.
In some embodiments, the in situ crosslinking agent is a triazole dimercaptoamine salt.
In some embodiments, the in situ crosslinking promoter is a mixture of stannous octoate, sodium isopropyl xanthate, N-ethyl-N-phenyl dithiocarbamic acid.
In some embodiments, the stannous octoate, sodium isopropylxanthate, N-ethyl-N-phenyldithiocarbamic acid is present in a mass ratio of 1:2:7.
another embodiment of the present application provides a method for preparing the above temperature-responsive in-situ polymerization modified composite grouting material, including the following steps:
step S1, weighing silicate cement clinker, gypsum and quicklime according to parts by weight, adding a proper amount of water, and stirring and mixing uniformly to obtain grouting base stock slurry;
s2, weighing an active mixture according to the parts by weight, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution;
and S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1, adding an in-situ crosslinking agent and an in-situ crosslinking accelerator according to parts by weight, and uniformly stirring and mixing to obtain the temperature-responsive in-situ polymerization modified composite grouting material.
In some embodiments, in step S1, water is added in a ratio of water to ash (mass ratio) of 0.5-1.5 (e.g., 0.5, 0.7, 0.9, 1, 1.2, 1.4, 1.5), and the mixture is stirred and mixed uniformly.
In some embodiments, in step S2, water is added in a ratio of 0.1 to 0.5 (e.g., 0.1, 0.2, 0.3, 0.4, 0.5) in terms of solid-to-liquid ratio (mass ratio), and the mixture is stirred and mixed uniformly.
In some embodiments, in step S3, the mass ratio of active mixture (solid) to grouting binder (i.e. total mass of silicate cement clinker, gypsum, quicklime solid) is 1:15.
in some embodiments, the active mixed solution has a concentration of 0.2% -0.5% by mass (e.g., 0.2%, 0.3%, 0.4%, 0.5%), a concentration of 0.4% -0.6% by mass (e.g., 0.4%, 0.5%, 0.6%), a concentration of 0.1% -0.5% by mass (e.g., 0.1%, 0.2%, 0.3%, 0.4%, 0.5%), a concentration of 0.05% -0.15% by mass (e.g., 0.05%, 0.07%, 0.1%, 0.12%, 0.14%, 0.15%), a concentration of 0.01% -0.06% by mass (e.g., 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%) of sodium acrylate, in the active mixed solution.
In some embodiments, in both the step S1 and the step S2, the stirring manner is a combination of mechanical stirring and ultrasonic stirring.
In some embodiments, in step S1 and step S2, the stirring time of the active mixed solution and the stirring of the grouting base slurry are both 10-15min (such as 10min, 11min, 12min, 13min, 14min, 15 min), i.e. dispersing for 10-15min under the cooperation of mechanical stirring and ultrasonic stirring.
In some embodiments, in the step S1 and the step S2, the stirring of the active mixed solution and the stirring of the grouting base stock slurry are performed by adding water, stirring and mixing in a reaction kettle containing deionized water at 35 ℃.
In some embodiments, in the step S1 and the step S2, the power of the ultrasonic agitation is 300W.
According to the application method of the temperature-responsive in-situ polymerization modified composite grouting material provided by the embodiment of the third aspect of the application, the prepared temperature-responsive in-situ polymerization modified composite grouting material is added with water (such as 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45 and 1.5) according to the water-cement ratio, slurry is obtained after stirring, and the slurry is subjected to grouting by a grouting pump.
The beneficial effects of the application are as follows:
(1) The temperature-responsive in-situ polymerization modified composite grouting material prepared by the application can form a chemical bond with a coal interface in situ, fully exert high bonding strength determined by a covalent bond, effectively increase the bonding force between the grouting material and an organic coal interface, improve the grouting reinforcement effect of the grouting material, and fully exert the advantages of low price, simple process and good bonding effect of an inorganic grouting material.
(2) The temperature-responsive in-situ polymerization modified inorganic grouting material prepared by the application can form an interpenetrating network structure (IPN) of an organic macromolecular chain and an inorganic gel, and effectively increases the strength and durability of the grouting material.
(3) The temperature-responsive in-situ polymerization modified inorganic grouting material prepared by the application has temperature response characteristics, and when a gel component in the grouting material begins to hydrate, the hydration heat released is used as driving heat of in-situ polymerization to induce the in-situ polymerization reaction to begin.
(4) The preparation method of the temperature-responsive in-situ polymerization modified inorganic grouting material is simple, the process is stable, and the operation is convenient.
Detailed Description
Embodiments of the present application are described in detail below. The following examples are illustrative and are intended to be illustrative of the application and are not to be construed as limiting the application.
The temperature-responsive in-situ polymerization modified composite grouting material and the preparation method thereof in the embodiment of the application are described below.
In one aspect, the embodiment of the application provides a temperature-responsive in-situ polymerization modified composite grouting material, which comprises the following components in parts by weight: 86-95 parts (such as 86 parts, 88 parts, 90 parts, 92 parts and 94 parts) of silicate cement clinker, 13-19 parts (such as 14 parts, 16 parts and 18 parts) of gypsum, 1-5 parts (such as 2 parts and 4 parts) of quicklime, 5-8 parts (such as 5 parts, 6 parts, 7 parts and 8 parts) of active mixture, 0.2-0.5 part (such as 0.2 part, 0.3 part, 0.4 part and 0.5 part) of in-situ crosslinking agent and 0.1-0.3 part (such as 0.1 part, 0.2 part and 0.3 part) of in-situ crosslinking accelerator.
The in-situ crosslinking reaction driving heat is cement clinker hydration heat, the hydration heat heats the system and polymerizes the surface of the coal body, and the prepared blend not only enables the coal body and grouting material to form chemical bonds to improve bonding strength, but also is filled in an inorganic grouting material to form an organic-inorganic interpenetrating network structure to improve the strength of the filling body.
In the prior art, the organic grouting material has the problems of high price, environmental pollution, easy aging and the like, and the inorganic grouting material has the common problem of weak acting force with the molecules of the organic coal body. Therefore, the strong interface bonding and high-reactivity temperature-driven in-situ polymerization modified inorganic grouting material is developed, the strength of the interface transition region between the inorganic grouting material and the coal body can be remarkably improved, and the problem that the bonding strength of the interface between the conventional inorganic grouting material and the coal body cannot meet the requirement is solved.
In some specific embodiments, the reactive mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid, sodium acrylate.
In some specific embodiments, the in situ crosslinking agent is a triazole dimercaptoamine salt.
In some specific embodiments, the in situ crosslinking promoter is a mixture of stannous octoate, sodium isopropyl xanthate, N-ethyl-N-phenyl dithiocarbamic acid.
In some specific embodiments, the mass ratio of stannous octoate, sodium isopropylxanthate, N-ethyl-N-phenyldithiocarbamic acid is 1:2:7.
another embodiment of the present application provides a method for preparing the above temperature-responsive in-situ polymerization modified composite grouting material, including the following steps:
step S1, weighing silicate cement clinker, gypsum and quicklime according to parts by weight, adding a proper amount of water, and stirring and mixing uniformly to obtain grouting base stock slurry;
s2, weighing an active mixture according to the parts by weight, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution;
and S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1, adding an in-situ crosslinking agent and an in-situ crosslinking accelerator according to parts by weight, and uniformly stirring and mixing to obtain the temperature-responsive in-situ polymerization modified composite grouting material.
In some specific embodiments, in step S1, water is added according to a ratio of water to ash (mass ratio) of 0.5-1.5 (such as 0.5, 0.7, 0.9, 1, 1.2, 1.4, 1.5), and the mixture is stirred and mixed uniformly.
In some specific embodiments, in step S2, water is added in a ratio of 0.1 to 0.5 (e.g., 0.1, 0.2, 0.3, 0.4, 0.5) in terms of solid-to-liquid ratio (mass ratio), and the mixture is stirred and mixed uniformly.
In some specific embodiments, in step S3, the mass ratio of active mixture (solid) to grouting binder (i.e. total mass of silicate cement clinker, gypsum, quicklime solid) is 1:15.
in some specific embodiments, the active blend solution has a concentration of 0.2% to 0.5% by mass (e.g., 0.2%, 0.3%, 0.4%, 0.5%) of butyl acrylate-styrene, a concentration of 0.4% to 0.6% by mass (e.g., 0.4%, 0.5%, 0.6%), a concentration of 0.1% to 0.5% by mass (e.g., 0.1%, 0.2%, 0.3%, 0.4%, 0.5%) of methacrylic acid-isoprene, a concentration of 0.05% to 0.15% by mass (e.g., 0.05%, 0.07%, 0.1%, 0.12%, 0.14%, 0.15%), a concentration of 0.01% to 0.06% by mass (e.g., 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%) of methacrylic acid.
In some specific embodiments, in step S1 and step S2, the stirring manner is a combination of mechanical stirring and ultrasonic stirring.
In some specific embodiments, in step S1 and step S2, the stirring time of the active mixed solution and the stirring of the grouting base slurry are both 10-15min (such as 10min, 11min, 12min, 13min, 14min, 15 min), i.e. dispersing for 10-15min under the cooperation of mechanical stirring and ultrasonic stirring.
In some embodiments, in step S1 and step S2, the stirring of the active mix solution and the stirring of the grouting binder slurry are performed by adding water and stirring in a reaction kettle containing deionized water at 35 ℃.
In some embodiments, in step S1 and step S2, the power of the ultrasonic agitation is 300W.
According to the application method of the temperature-responsive in-situ polymerization modified composite grouting material provided by the embodiment of the third aspect of the application, the prepared temperature-responsive in-situ polymerization modified composite grouting material is added with water (such as 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45 and 1.5) according to the water-cement ratio, slurry is obtained after stirring, and the slurry is subjected to grouting by a grouting pump.
The application is further illustrated by the following specific examples.
Example 1
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and S1, weighing 86 parts of ordinary silicate cement clinker, 13 parts of gypsum and 1 part of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 5 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.2 part of triazole dimercapto amine salt and 0.1 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Example 2
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and S1, weighing 88 parts of ordinary Portland cement clinker, 14 parts of gypsum and 2 parts of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 6 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.3 part of triazole dimercapto amine salt and 0.2 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Example 3
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and S1, weighing 88 parts of ordinary Portland cement clinker, 14 parts of gypsum and 2 parts of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 6 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.3 part of triazole dimercapto amine salt and 0.3 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Example 4
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and S1, weighing 89 parts of ordinary silicate cement clinker, 15 parts of gypsum and 3 parts of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 7 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.4 part of triazole dimercapto amine salt and 0.3 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Example 5
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and step S1, weighing 90 parts of ordinary Portland cement clinker, 16 parts of gypsum and 4 parts of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 8 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.5 part of triazole dimercapto amine salt and 0.4 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Example 6
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and S1, weighing 91 parts of ordinary Portland cement clinker, 17 parts of gypsum and 5 parts of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 5 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate. Wherein the mass percentage concentration of butyl acrylate-styrene is 0.2%, the mass percentage concentration of butadiene-acrylic acid is 0.4%, and the mass percentage concentration of methacrylic acid-isoprene is 0.1%.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.5 part of triazole dimercapto amine salt and 0.4 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Example 7
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and S1, weighing 91 parts of ordinary Portland cement clinker, 17 parts of gypsum and 5 parts of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 5 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate. Wherein the mass percentage concentration of butyl acrylate-styrene is 0.3%, the mass percentage concentration of butadiene-acrylic acid is 0.4%, and the mass percentage concentration of methacrylic acid-isoprene is 0.2%.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.5 part of triazole dimercapto amine salt and 0.4 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Example 8
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and S1, weighing 91 parts of ordinary Portland cement clinker, 17 parts of gypsum and 5 parts of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 5 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate. Wherein the mass percentage concentration of butyl acrylate-styrene is 0.4%, the mass percentage concentration of butadiene-acrylic acid is 0.5%, and the mass percentage concentration of methacrylic acid-isoprene is 0.3%.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.5 part of triazole dimercapto amine salt and 0.4 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Example 9
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and S1, weighing 91 parts of ordinary Portland cement clinker, 17 parts of gypsum and 5 parts of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 5 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate. Wherein the mass percentage concentration of butyl acrylate-styrene is 0.5%, the mass percentage concentration of butadiene-acrylic acid is 0.6%, and the mass percentage concentration of methacrylic acid-isoprene is 0.4%.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.5 part of triazole dimercapto amine salt and 0.4 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Example 10
A preparation method of a temperature-responsive in-situ polymerization modified inorganic grouting material comprises the following steps:
and S1, weighing 91 parts of ordinary Portland cement clinker, 17 parts of gypsum and 5 parts of quicklime according to the proportion, adding water, stirring and mixing uniformly to obtain grouting base stock slurry.
And S2, weighing 5 parts of the active mixture according to the proportion, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution. Wherein the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate. Wherein the mass percentage concentration of butyl acrylate-styrene is 0.5%, the mass percentage concentration of butadiene-acrylic acid is 0.5%, and the mass percentage concentration of methacrylic acid-isoprene is 0.4%.
And step S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1 according to a proportion, adding 0.5 part of triazole dimercapto amine salt and 0.4 part of in-situ crosslinking accelerator according to a proportion, and stirring and mixing uniformly to obtain the temperature-responsive in-situ polymerization modified composite grouting material. When in use, the prepared slurry is injected by the injection pump. Wherein the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid.
Performance test:
2Kg of the grouting material prepared in the example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Comparative example 1
Only 88 parts of ordinary Portland cement clinker, 14 parts of gypsum and 2 parts of quicklime are weighed, and water is added to stir and mix uniformly to obtain the grouting material.
Performance test:
2Kg of grouting material prepared in the comparative example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Comparative example 2
Only 89 parts of ordinary silicate cement clinker, 15 parts of gypsum and 3 parts of quicklime are weighed, and water is added to stir and mix uniformly to obtain the grouting material.
Performance test:
2Kg of grouting material prepared in the comparative example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
Comparative example 3
Only 90 parts of ordinary silicate cement clinker, 16 parts of gypsum and 4 parts of quicklime are weighed, and water is added to stir and mix uniformly to obtain the grouting material.
Performance test:
2Kg of grouting material prepared in the comparative example is weighed and mixed with deionized water according to a mass ratio of 1:1, uniformly mixing, and testing the bonding strength of the slurry by referring to the national standard GB/T29756-2013; the slurry was prepared into a 40mm by 160mm test block, and the bonding strength of the slurry was tested with reference to the national standard GB/T17671-2021 to characterize the compressive strength of the material.
The test results of examples 1-10 and comparative examples 1-3 are shown in Table 1:
TABLE 1
Through comparative analysis, the final prepared grouting materials of examples 1 to 10 were all better in compressive strength than comparative examples 1 to 3, and the bonding strength was all better than or equal to comparative examples 1 to 3 except for example 1. The application is characterized in that the active mixed solution, the in-situ crosslinking agent and the in-situ crosslinking accelerator are added according to the parts by weight. Whereas the adhesive strength in example 1 was poor because the amounts of the in-situ crosslinking agent and the in-situ crosslinking accelerator added in example 1 were small, so that the active mixed solution did not function sufficiently and the cement hydration was affected.
In summary, in the application, a proper amount of triazole dimercaptamine salt is added into unsaturated aqueous solution such as butyl acrylate-styrene and the like to serve as an in-situ crosslinking agent, stannous octoate and the like are immersed into inorganic grouting solution, cement hydration heat serves as driving heat to heat up a system and polymerize the surface of a coal body, and the prepared blend not only enables the coal body and grouting material to form chemical bonds to improve bonding strength, but also is filled into inorganic grouting material to form an organic-inorganic interpenetrating network structure to improve strength of the filling body.
The grouting material can form a chemical bond with a coal body interface in situ, fully exert high bonding strength determined by a covalent bond, effectively increase the bonding force between the grouting material and an organic coal body interface, improve the grouting reinforcement effect of the grouting material, and fully exert the advantages of low price, simple process and good bonding effect of an inorganic grouting material.
The grouting material prepared by the application can form an interpenetrating network structure of an organic macromolecular chain and an inorganic gel, and the strength and the durability of the grouting material are effectively enhanced. Meanwhile, the grouting material prepared by the application has temperature response characteristic, and when the gel component in the grouting material begins to hydrate, the hydration heat released is used as driving heat for in-situ polymerization to induce the in-situ polymerization reaction to begin.
The inorganic grouting material has the advantages of simple preparation method, stable process, convenient operation, high strength and good bonding performance with coal.
The terms "one aspect embodiment," "some embodiments," and the like, herein refer to a particular feature, structure, material, or characteristic described in connection with the embodiment being included in at least one embodiment of the application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments. Furthermore, the various embodiments described in this specification, as well as the features of the various embodiments, can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (6)
1. The temperature-responsive in-situ polymerization modified composite grouting material is characterized by comprising the following components in parts by weight: 86-95 parts of silicate cement clinker, 13-19 parts of gypsum, 1-5 parts of quicklime, 5-8 parts of active mixture, 0.2-0.5 part of in-situ crosslinking agent and 0.1-0.3 part of in-situ crosslinking accelerator;
the active mixture is a mixture of butyl acrylate-styrene, butadiene-acrylic acid, methacrylic acid-isoprene, methacrylic acid and sodium acrylate;
the in-situ crosslinking agent is triazole dimercaptamine salt;
the in-situ crosslinking accelerator is a mixture of stannous octoate, sodium isopropyl xanthate and N-ethyl-N-phenyl dithiocarbamic acid;
the mass ratio of stannous octoate to sodium isopropyl xanthate to N-ethyl-N-phenyl dithiocarbamic acid is 1:2:7.
2. a method for preparing the temperature-responsive in-situ polymerization modified composite grouting material as claimed in claim 1, which is characterized by comprising the following steps:
step S1, weighing silicate cement clinker, gypsum and quicklime according to parts by weight, adding a proper amount of water, and stirring and mixing uniformly to obtain grouting base stock slurry;
s2, weighing an active mixture according to the parts by weight, adding a proper amount of water, and stirring and uniformly mixing to obtain an active mixed solution;
and S3, adding the active mixed solution obtained in the step S2 into the grouting base material solution obtained in the step S1, adding an in-situ crosslinking agent and an in-situ crosslinking accelerator according to parts by weight, and uniformly stirring and mixing to obtain the temperature-responsive in-situ polymerization modified composite grouting material.
3. The method for preparing the temperature-responsive in-situ polymerization modified composite grouting material according to claim 2, wherein in the active mixed solution, the mass percentage concentration of butyl acrylate-styrene is 0.2% -0.5%, the mass percentage concentration of butadiene-acrylic acid is 0.4% -0.6%, the mass percentage concentration of methacrylic acid-isoprene is 0.1% -0.5%, the mass percentage concentration of methacrylic acid is 0.05% -0.15%, and the mass percentage concentration of sodium acrylate is 0.01% -0.06%.
4. The method for preparing the temperature-responsive in-situ polymerization modified composite grouting material according to claim 2, wherein in the step S1 and the step S2, the stirring modes are both a mode of combining mechanical stirring and ultrasonic stirring.
5. The method for preparing a temperature-responsive in-situ polymerization modified composite grouting material according to claim 4, wherein in the step S1 and the step S2, the stirring time is 10-15min, and the stirring temperature is 35 ℃.
6. The method for using the temperature-responsive in-situ polymerization modified composite grouting material according to claim 1, which is characterized in that water is added into the prepared temperature-responsive in-situ polymerization modified composite grouting material according to the water-cement ratio of 0.45-1.5, slurry is obtained after stirring, and grouting is carried out on the slurry through a grouting pump.
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| WO2022099935A1 (en) * | 2020-11-16 | 2022-05-19 | 同济大学 | Ultrahigh molecular weight fiber-emulsified asphalt modified high-toughness geopolymer grouting material, preparation method therefor and application thereof |
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