CN114180874A - Additive composition agent of powder rapid repair material and application of additive composition agent in cement concrete - Google Patents
Additive composition agent of powder rapid repair material and application of additive composition agent in cement concrete Download PDFInfo
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- CN114180874A CN114180874A CN202111678254.5A CN202111678254A CN114180874A CN 114180874 A CN114180874 A CN 114180874A CN 202111678254 A CN202111678254 A CN 202111678254A CN 114180874 A CN114180874 A CN 114180874A
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- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
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- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
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- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an additive composition agent of a powder quick repairing material and application thereof in cement concrete, comprising the following components: 260-300 parts of aluminum sulfate, 30-40 parts of ferric sulfate, 15-20 parts of lithium sulfate, 15-20 parts of magnesium oxide, 20-30 parts of magnesium fluosilicate and 80-150 parts of modified nano silicon dioxide; placing the materials in a ball milling tank, wherein the ball-material ratio is 20-30: 1, ball milling is carried out for 1-2 hours at 300-500 rpm under the protection of argon, and the particle size of the ground powder is 200-300 meshes, so as to obtain an additive composition agent of the powder quick repairing material; the adding composition agent of the powder rapid repair material is mixed with water and diethanolamine according to the mass ratio of 400-600: 200-300: 20-30, and then the mixture is mixed with cement according to the mass ratio of 6-8: 100. The aluminum sulfate is used as a main component, and is combined with other components, the nano-silica material has a large specific surface area, can provide crystallization nucleation points for hydration products of cement, has the effect of promoting early hydration, can be filled in nano-scale pores of the cement material, improves the compactness of an internal structure, and meets the requirements of cement strength and durability.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to an addition composition agent of a powder quick repairing material and application of the addition composition agent in cement concrete.
Background
Along with the development of economy in China, the infrastructure is more and more perfect, and facilities such as tunnels, bridges, highways and the like are continuously built, so that convenience is provided for people, and power is also provided for economy. In various infrastructures, most of concrete structures are required to be reinforced and maintained urgently due to unreasonable design, defects in construction, environmental erosion, improper maintenance and the like. Therefore, research and development of cement concrete repair materials are necessary.
The traditional cement concrete repairing materials can be divided into inorganic materials and organic materials, wherein the inorganic repairing materials are widely used. The inorganic repairing material is ordinary portland cement repairing mortar, which is prepared by mixing and stirring ordinary portland cement, fine aggregate, water and a small amount of additives, has the advantages of high strength, good compatibility, simple and convenient construction and the like, and can be used for repairing the surface damage of ordinary concrete. But the shrinkage rate is large, particularly in dry and hot environments, the compatibility is adversely affected, and the impermeability of the whole repair system is indirectly reduced. In addition, the maintenance period of the ordinary portland cement repair mortar is long, the repair period is prolonged, and the ordinary portland cement repair mortar is not suitable for rush repair engineering. Therefore, a quick repairing material with good phase solubility, uniform material mixing and high later strength is needed.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
In order to achieve the objects and other advantages according to the present invention, an additive composition for a powder rapid repair material is provided, which comprises the following components in parts by weight:
260-300 parts of aluminum sulfate, 30-40 parts of ferric sulfate, 15-20 parts of lithium sulfate, 15-20 parts of magnesium oxide, 20-30 parts of magnesium fluosilicate and 80-150 parts of modified nano silicon dioxide.
Preferably, the composition comprises the following components in parts by weight: 260 parts of aluminum sulfate, 30 parts of ferric sulfate, 15 parts of lithium sulfate, 16 parts of magnesium oxide, 20 parts of magnesium fluosilicate and 80 parts of modified nano silicon dioxide.
Preferably, the preparation method of the modified nano silicon dioxide comprises the following steps:
activation treatment of nano silicon dioxide: mixing nano silicon dioxide with 30-50% of sodium hydroxide solution according to the mass ratio of 1: 300-400, stirring for 2-4 h at the temperature of 60-80 ℃, washing and centrifuging; mixing the treated nano silicon dioxide with 50-75% of ethanol solution according to the mass ratio of 1: 200-300, and stirring for 1-2 h; adding a silane coupling agent into the mixed solution, adding a oxalic acid solution to adjust the pH value to 3-5, stirring for 2-4 h at 35-75 ℃, centrifuging, and drying to obtain activated nano silicon dioxide; wherein the dosage of the silane coupling agent is 1-3% of the mass of the nano silicon dioxide, and the silane coupling agent can be any one of KH-550, KH-560 and KH-570;
and II, coating and activating nano silicon dioxide by carboxymethyl cellulose: adding a certain amount of carboxymethyl cellulose into distilled water, and stirring at 80-90 ℃ until the carboxymethyl cellulose is completely dissolved; adding a certain amount of activated nano silicon dioxide into the dissolved solution, placing the mixture into a microwave and ultrasonic integrated reactor, simultaneously starting microwaves and ultrasonic waves for synergistic treatment for 10-20 min, wherein the microwave power is 120-300W, the ultrasonic power is 150-300W, the ultrasonic frequency is 35-50 KHz, and the temperature is 80-90 ℃ to obtain a mixed solution; wherein the mass ratio of the activated nano silicon dioxide to the carboxymethyl cellulose to the distilled water is 1: 2-4: 160-320;
carboxymethyl cellulose graft-polymerized methyl methacrylate: under the protection of nitrogen atmosphere, adding sodium persulfate and methyl methacrylate into the mixed solution, magnetically stirring for 2-4 hours at the temperature of 80-90 ℃ and the stirring speed of 300-600 rpm, and adding hydroquinone to terminate the reaction; after precipitation, filtration and drying, washing the product with acetone, and extracting polymethyl methacrylate to obtain the modified nano-silica, wherein the mass ratio of sodium persulfate to methyl methacrylate to benzenediol to carboxymethylcellulose is 4-6: 1-2: 4-6: 1.
Preferably, the component mixing process is as follows: placing aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, magnesium fluosilicate and modified nano-silica into a ball milling tank, wherein the ball-to-material ratio is 20-30: 1, carrying out ball milling for 1-2 h at 300-500 rpm under the protection of argon, and obtaining the addition composition agent for the powder rapid repair material, wherein the particle size of the powder after grinding is 200-300 meshes.
Preferably, the additive composition agent of the powder quick repairing material obtained after ball milling and mixing is subjected to acoustic resonance mixing treatment, and the process is as follows: the adding composition agent of the powder quick repair material is placed in an acoustic resonance tank, the vibration frequency is set to be 30-160 Hz, the vibration amplitude is set to be 0.3-1 mm, the mixing time is 30-60 min, the mixing process is intermittent resonance mixing, and the intermittent circulation is resonance for 3-5 min and pause for 3-5 min.
Preferably, the application method of the addition composition agent of the powder quick repairing mix in the cement concrete comprises the following steps: the adding composition agent of the powder rapid repair material is mixed with water and diethanolamine according to the mass ratio of 400-600: 200-300: 20-30, and then the mixture is mixed with cement according to the mass ratio of 6-8: 100.
Preferably, the cement is any one of portland cement, ordinary portland cement, and composite portland cement.
The invention at least comprises the following beneficial effects: the invention relates to an additive composition agent of a powder quick repairing material and application thereof in cement concrete. The nano silicon dioxide is coated with carboxymethyl cellulose after being activated, and then methyl methacrylate is polymerized, so that the wettability of the surface of the nano silicon dioxide is changed, and the compatibility and the dispersibility in a medium are enhanced. Therefore, the addition combination agent of the powder quick patching material can obviously improve the performance of the cement patching material, accelerate the initial setting time of the cement patching material, enhance the compressive strength of the cement and meet the requirements of the strength and durability of the cement.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
The specific implementation mode is as follows:
the present invention is described in further detail below to enable those skilled in the art to practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
< example 1>
An additive composition agent of a powder quick repairing material and application thereof in cement concrete comprise:
the preparation method of the modified nano silicon dioxide comprises the following steps:
activation treatment of nano silicon dioxide: mixing the nano silicon dioxide with a 50% sodium hydroxide solution according to a mass ratio of 1:300, stirring for 2h at 75 ℃, washing and centrifuging; mixing the treated nano silicon dioxide with 75% ethanol solution according to the mass ratio of 1:200, and stirring for 1 h; adding a silane coupling agent KH-560 into the mixed solution, wherein the amount of the silane coupling agent KH-560 is 3% of the mass of the nano-silica, adding oxalic acid solution to adjust the pH value to 3.5, stirring for 2h at 75 ℃, centrifuging, and drying to obtain the activated nano-silica.
And II, coating and activating nano silicon dioxide by carboxymethyl cellulose: adding a certain amount of carboxymethyl cellulose into distilled water, and stirring at 80 ℃ until the carboxymethyl cellulose is completely dissolved; adding a certain amount of activated nano silicon dioxide into the dissolved solution, placing the mixture into a microwave and ultrasonic integrated reactor, simultaneously starting microwave and ultrasonic for synergistic treatment for 20min, wherein the microwave power is 300W, the ultrasonic frequency is 40KHz, and the temperature is 80 ℃ to obtain a mixed solution; wherein the mass ratio of the activated nano silicon dioxide to the carboxymethyl cellulose to the distilled water is 1:4: 320.
Carboxymethyl cellulose graft-polymerized methyl methacrylate: under the protection of nitrogen atmosphere, adding sodium persulfate and methyl methacrylate into the mixed solution, magnetically stirring for 2 hours at the temperature of 80 ℃ and the stirring speed of 500rpm, and adding hydroquinone to terminate the reaction; after precipitation, filtration and drying, finally washing the product with acetone, and extracting polymethyl methacrylate to obtain the modified nano-silica, wherein the mass ratio of sodium persulfate to methyl methacrylate to benzenediol to carboxymethyl cellulose is 6:2:4: 1.
Step two, weighing 2600g of aluminum sulfate, 300g of ferric sulfate, 150g of lithium sulfate, 160g of magnesium oxide, 200g of magnesium fluosilicate and 800g of modified nano silicon dioxide; placing aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, magnesium fluosilicate and modified nano-silica into a ball milling tank, wherein the ball-to-material ratio is 20:1, carrying out ball milling for 2 hours at 300rpm under the protection of argon, and the particle size of the ground powder is 200 meshes; and obtaining the additive composition agent of the powder quick repairing material.
Mixing the additive composition agent of the powder quick repair material with water and diethanol amine according to the mass ratio of 400:200:20, and mixing the mixture with silicate cement according to the mass ratio of 6: 100; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: initial setting time is 3min, and final setting time is 9.6 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 42.7MPa, and the 28d compressive strength ratio is 94.8 percent.
< example 2>
An additive composition agent of a powder quick repairing material and application thereof in cement concrete comprise:
step one, the preparation method of the modified nano silica is the same as that of example 1.
Weighing 3000g of aluminum sulfate, 350g of ferric sulfate, 170g of lithium sulfate, 180g of magnesium oxide, 200g of magnesium fluosilicate and 800g of modified nano silicon dioxide; placing aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, magnesium fluosilicate and modified nano-silica into a ball milling tank, wherein the ball-to-material ratio is 20:1, carrying out ball milling for 2 hours at 300rpm under the protection of argon, and the particle size of the ground powder is 200 meshes; and obtaining the additive composition agent of the powder quick repairing material.
Step three, mixing the additive composition agent of the powder quick repair material with water and diethanol amine according to the mass ratio of 400:200:25, and then mixing the mixture with silicate cement according to the mass ratio of 6: 100; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: initial setting time is 3.1min, and final setting time is 9.5 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 41.6MPa, and the 28d compressive strength ratio is 94.5 percent.
< example 3>
An additive composition agent of a powder quick repairing material and application thereof in cement concrete comprise:
step one, the preparation method of the modified nano silica is the same as that of example 1.
Weighing 3000g of aluminum sulfate, 400g of ferric sulfate, 200g of lithium sulfate, 200g of magnesium oxide, 200g of magnesium fluosilicate and 800g of modified nano silicon dioxide; placing aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, magnesium fluosilicate and modified nano-silica into a ball milling tank, wherein the ball-to-material ratio is 20:1, carrying out ball milling for 2 hours at 300rpm under the protection of argon, and the particle size of the ground powder is 200 meshes; and obtaining the additive composition agent of the powder quick repairing material.
Mixing the additive composition agent of the powder quick repair material with water and diethanol amine according to the mass ratio of 400:200:30, and mixing the mixture with silicate cement according to the mass ratio of 6: 100; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: the initial setting time is 3min, and the final setting time is 9 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 41.2MPa, and the 28d compressive strength ratio is 94.2 percent.
< example 4>
An additive composition agent of a powder quick repairing material and application thereof in cement concrete comprise:
step one, the preparation method of the modified nano silica is the same as that of example 1.
Step two, weighing 2600g of aluminum sulfate, 300g of ferric sulfate, 150g of lithium sulfate, 160g of magnesium oxide, 200g of magnesium fluosilicate and 800g of modified nano silicon dioxide; placing aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, magnesium fluosilicate and modified nano-silica into a ball milling tank, wherein the ball-to-material ratio is 20:1, carrying out ball milling for 2 hours at 300rpm under the protection of argon, and obtaining an addition composition agent of the powder quick repairing material, wherein the particle size of the powder after grinding is 200 meshes; the adding composition agent of the powder quick repair material is placed in an acoustic resonance tank, the vibration frequency is set to be 60Hz, the vibration amplitude is set to be 0.5mm, the mixing time is 30min, the mixing process is intermittent resonance mixing, and the interval circulation is resonance for 3min and pause for 3 min.
Mixing the additive composition agent of the powder quick repair material with water and diethanol amine according to the mass ratio of 400:200:20, and mixing the mixture with silicate cement according to the mass ratio of 6: 100; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: initial setting time is 2.8min, and final setting time is 8.5 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 45.8MPa, and the 28d compressive strength ratio is 96.5 percent.
In the second step of this embodiment, the additive composition agent of the powder rapid repair material obtained after ball milling and mixing is subjected to acoustic resonance mixing, and the modified nano-silica is more uniformly mixed in the powder by low-frequency acoustic resonance mixing. In comparison with example 1, the initial setting time is shorter and the compressive strength is enhanced.
< comparative example 1>
An additive composition agent of a powder quick repairing material and application thereof in cement concrete comprise:
firstly, weighing 2600g of aluminum sulfate, 300g of ferric sulfate, 150g of lithium sulfate, 160g of magnesium oxide, 200g of magnesium fluosilicate and 800g of nano silicon dioxide; placing aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, magnesium fluosilicate and nano-silica into a ball milling tank, wherein the ball-to-material ratio is 20:1, carrying out ball milling for 2 hours at 300rpm under the protection of argon, and the particle size of the ground powder is 200 meshes; and obtaining the additive composition agent of the powder quick repairing material.
Step two, mixing the additive composition agent of the powder quick repair material with water and diethanol amine according to the mass ratio of 400:200:20, and then mixing the mixture with silicate cement according to the mass ratio of 6: 100; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: the initial setting time is 4min, and the final setting time is 11 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 35.8MPa, and the 28d compressive strength ratio is 92.5 percent.
In the comparative example, unmodified nano silicon dioxide is directly mixed with other components to obtain the additive composition of the powder rapid repairing material. In comparison with example 1 using modified nano-silica, the initial setting time is increased and the compressive strength is reduced.
< comparative example 2>
An additive composition agent of a powder quick repairing material and application thereof in cement concrete comprise:
weighing 3000g of aluminum sulfate, 350g of ferric sulfate, 170g of lithium sulfate, 180g of magnesium oxide, 200g of magnesium fluosilicate and 800g of nano silicon dioxide; placing aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, magnesium fluosilicate and nano-silica into a ball milling tank, wherein the ball-to-material ratio is 20:1, carrying out ball milling for 2 hours at 300rpm under the protection of argon, and the particle size of the ground powder is 200 meshes; and obtaining the additive composition agent of the powder quick repairing material.
Step three, mixing the additive composition agent of the powder quick repair material with water and diethanol amine according to the mass ratio of 400:200:25, and then mixing the mixture with silicate cement according to the mass ratio of 6: 100; the test is carried out according to the experimental conditions in the appendix D of GB/T35159-2017, and the result is that: initial setting time is 4.1min, and final setting time is 11.2 min; the test is carried out according to the experimental conditions in the appendix E of GB/T35159-2017, and the result is that: the 1d compressive strength is 35.5MPa, and the 28d compressive strength ratio is 92.3 percent.
In the comparative example, unmodified nano silicon dioxide is directly mixed with other components to obtain the additive composition of the powder rapid repairing material. In comparison with example 2 using modified nano-silica, the initial setting time is increased and the compressive strength is reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The additive composition agent for the powder quick repairing material is characterized by comprising the following components in parts by weight: 260-300 parts of aluminum sulfate, 30-40 parts of ferric sulfate, 15-20 parts of lithium sulfate, 15-20 parts of magnesium oxide, 20-30 parts of magnesium fluosilicate and 80-150 parts of modified nano silicon dioxide.
2. The additive composition agent for the powder quick repairing material according to claim 1, which comprises the following components in parts by weight: 260 parts of aluminum sulfate, 30 parts of ferric sulfate, 15 parts of lithium sulfate, 16 parts of magnesium oxide, 20 parts of magnesium fluosilicate and 80 parts of modified nano silicon dioxide.
3. The additive composition agent for the powder rapid repair material according to claim 2, wherein the preparation method of the modified nano-silica comprises the following steps:
activation treatment of nano silicon dioxide: mixing nano silicon dioxide with 30-50% of sodium hydroxide solution according to the mass ratio of 1: 300-400, stirring for 2-4 h at the temperature of 60-80 ℃, washing and centrifuging; mixing the treated nano silicon dioxide with 50-75% of ethanol solution according to the mass ratio of 1: 200-300, and stirring for 1-2 h; adding a silane coupling agent into the mixed solution, adding a oxalic acid solution to adjust the pH value to 3-5, stirring for 2-4 h at 35-75 ℃, centrifuging, and drying to obtain activated nano silicon dioxide; wherein the dosage of the silane coupling agent is 1-3% of the mass of the nano silicon dioxide, and the silane coupling agent can be any one of KH-550, KH-560 and KH-570;
and II, coating and activating nano silicon dioxide by carboxymethyl cellulose: adding a certain amount of carboxymethyl cellulose into distilled water, and stirring at 80-90 ℃ until the carboxymethyl cellulose is completely dissolved; adding a certain amount of activated nano silicon dioxide into the dissolved solution, placing the mixture into a microwave and ultrasonic integrated reactor, simultaneously starting microwaves and ultrasonic waves for synergistic treatment for 10-20 min, wherein the microwave power is 120-300W, the ultrasonic power is 150-300W, the ultrasonic frequency is 35-50 KHz, and the temperature is 80-90 ℃ to obtain a mixed solution; wherein the mass ratio of the activated nano silicon dioxide to the carboxymethyl cellulose to the distilled water is 1: 2-4: 160-320;
carboxymethyl cellulose graft-polymerized methyl methacrylate: under the protection of nitrogen atmosphere, adding sodium persulfate and methyl methacrylate into the mixed solution, magnetically stirring for 2-4 hours at the temperature of 80-90 ℃ and the stirring speed of 300-600 rpm, and adding hydroquinone to terminate the reaction; after precipitation, filtration and drying, washing the product with acetone, and extracting polymethyl methacrylate to obtain the modified nano-silica, wherein the mass ratio of sodium persulfate to methyl methacrylate to benzenediol to carboxymethylcellulose is 4-6: 1-2: 4-6: 1.
4. The additive composition agent for the powder rapid repair material according to claim 2, wherein the component mixing process is as follows: placing aluminum sulfate, ferric sulfate, lithium sulfate, magnesium oxide, magnesium fluosilicate and modified nano-silica into a ball milling tank, wherein the ball-to-material ratio is 20-30: 1, carrying out ball milling for 1-2 h at 300-500 rpm under the protection of argon, and obtaining the addition composition agent for the powder rapid repair material, wherein the particle size of the powder after grinding is 200-300 meshes.
5. The additive composition agent for the powder rapid repair material according to claim 4, wherein the additive composition agent for the powder rapid repair material obtained after ball milling and mixing is subjected to acoustic resonance mixing treatment, and the process is as follows: the adding composition agent of the powder quick repair material is placed in an acoustic resonance tank, the vibration frequency is set to be 30-160 Hz, the vibration amplitude is set to be 0.3-1 mm, the mixing time is 30-60 min, the mixing process is intermittent resonance mixing, and the intermittent circulation is resonance for 3-5 min and pause for 3-5 min.
6. The addition composition agent of the powder rapid repair material as defined in any one of claims 1 to 5 and the application thereof in cement concrete, wherein the application method of the addition composition agent of the powder rapid repair material in the cement concrete is as follows: the adding composition agent of the powder rapid repair material is mixed with water and diethanolamine according to the mass ratio of 400-600: 200-300: 20-30, and then the mixture is mixed with cement according to the mass ratio of 6-8: 100.
7. The additive composition agent for the powder quick repair material according to any one of claims 1 to 6 and the application thereof in cement concrete, wherein the cement is any one of portland cement, ordinary portland cement and composite portland cement.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114804768A (en) * | 2022-04-29 | 2022-07-29 | 中建八局第二建设有限公司 | High-crack-resistance track concrete and preparation method and application thereof |
| CN114853440A (en) * | 2022-04-24 | 2022-08-05 | 山东润凝新材料科技有限公司 | HN-S material, preparation method thereof and pavement patching material |
| CN115417619A (en) * | 2022-08-26 | 2022-12-02 | 深圳市粤鑫新材料科技有限公司 | Concrete internal-doping type self-repairing waterproof agent |
| CN115815607A (en) * | 2022-12-21 | 2023-03-21 | 郑州磨料磨具磨削研究所有限公司 | High-efficiency acoustic resonance mixing method for composite high-energy ball milling |
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| CN114853440A (en) * | 2022-04-24 | 2022-08-05 | 山东润凝新材料科技有限公司 | HN-S material, preparation method thereof and pavement patching material |
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| CN115417619A (en) * | 2022-08-26 | 2022-12-02 | 深圳市粤鑫新材料科技有限公司 | Concrete internal-doping type self-repairing waterproof agent |
| CN115417619B (en) * | 2022-08-26 | 2023-04-18 | 深圳市粤鑫新材料科技有限公司 | Concrete internal-doping type self-repairing waterproof agent |
| CN115815607A (en) * | 2022-12-21 | 2023-03-21 | 郑州磨料磨具磨削研究所有限公司 | High-efficiency acoustic resonance mixing method for composite high-energy ball milling |
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