CN116285601A - Concrete protective material and preparation method thereof - Google Patents
Concrete protective material and preparation method thereof Download PDFInfo
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- CN116285601A CN116285601A CN202310304117.8A CN202310304117A CN116285601A CN 116285601 A CN116285601 A CN 116285601A CN 202310304117 A CN202310304117 A CN 202310304117A CN 116285601 A CN116285601 A CN 116285601A
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- 239000004567 concrete Substances 0.000 title claims abstract description 49
- 239000000463 material Substances 0.000 title claims abstract description 36
- 230000001681 protective effect Effects 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003822 epoxy resin Substances 0.000 claims abstract description 73
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 73
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 230000002195 synergetic effect Effects 0.000 claims abstract description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 11
- 239000013008 thixotropic agent Substances 0.000 claims description 11
- 239000003085 diluting agent Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 229910021485 fumed silica Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- YSUQLAYJZDEMOT-UHFFFAOYSA-N 2-(butoxymethyl)oxirane Chemical compound CCCCOCC1CO1 YSUQLAYJZDEMOT-UHFFFAOYSA-N 0.000 claims description 2
- QXONIHMUSQFKJU-UHFFFAOYSA-N 2-(prop-1-enoxymethyl)oxirane Chemical compound CC=COCC1CO1 QXONIHMUSQFKJU-UHFFFAOYSA-N 0.000 claims description 2
- FQYUMYWMJTYZTK-UHFFFAOYSA-N Phenyl glycidyl ether Chemical compound C1OC1COC1=CC=CC=C1 FQYUMYWMJTYZTK-UHFFFAOYSA-N 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- VYKXQOYUCMREIS-UHFFFAOYSA-N methylhexahydrophthalic anhydride Chemical group C1CCCC2C(=O)OC(=O)C21C VYKXQOYUCMREIS-UHFFFAOYSA-N 0.000 claims description 2
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims 1
- 239000004842 bisphenol F epoxy resin Substances 0.000 claims 1
- 125000001302 tertiary amino group Chemical group 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 230000004048 modification Effects 0.000 abstract description 10
- 238000012986 modification Methods 0.000 abstract description 10
- 230000009471 action Effects 0.000 abstract description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 7
- 238000010008 shearing Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 abstract description 4
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 abstract description 4
- 238000005979 thermal decomposition reaction Methods 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000011253 protective coating Substances 0.000 description 3
- 230000009974 thixotropic effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920006333 epoxy cement Polymers 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 125000004356 hydroxy functional group Chemical group O* 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010125 resin casting Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 150000003512 tertiary amines Chemical group 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4853—Epoxides
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/63—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0881—Titanium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- 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)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Paints Or Removers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
According to the concrete protective material and the preparation method thereof, the cubic cage type silsesquioxane and the nitrile rubber are adopted to synergistically modify the epoxy resin, so that the thermal decomposition temperature of the epoxy resin can be effectively increased, the thermal erosion effect of the outside on the matrix inside the composite material is isolated on the surface of the composite material, the epoxy resin is toughened and modified, the impact strength and the tensile strength of the epoxy resin are improved, meanwhile, the nitrile rubber is synergistically modified, the bearing capacity of the resin can be improved, the bonding performance between the epoxy resin and the concrete is improved, the resin is not easy to crack under the action of blending and shearing, the hydroxyl and methoxy groups in the cage type structure react with the hydroxyl groups in the epoxy resin, the cubic cage type silsesquioxane and the epoxy resin are crosslinked through chemical bonds under the action of a curing agent, and the toughness, the impact strength and the peeling strength can be greatly improved through the synergistic nitrile rubber modification.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a concrete protective material and a preparation method thereof.
Background
The epoxy resin mortar has wide application in the aspect of repairing defects of concrete buildings due to the advantages of high hardness and good cohesiveness, but has the problems of poor toughness, high water absorption, poor corrosion resistance, poor deformability, easiness in cracking, peeling and the like, so that the protection durability is reduced, and the defects limit the application of the epoxy resin mortar in the aspects of repairing and protecting the defects of concrete with high requirements on durability such as corrosion resistance, dirt resistance and the like.
However, the existing epoxy resins have the following problems: the adhesive strength with concrete is not high enough, the tensile strength is low, the toughness is poor, the water absorption is high, the corrosion resistance is poor, the deformability is poor, the problems of cracking, peeling and the like are easy to occur, the defects greatly limit the service time of epoxy resin in concrete surface protection application, when the environmental temperature change is large during service, the difference of linear expansion coefficients is large, the deformation difference between an epoxy cement protective layer and the concrete is easy to cause, the internal stress of the protective layer is increased, and when the tensile, compressive and adhesive strength of the coating is exceeded, the coating is easy to generate cracking or swelling phenomenon.
Disclosure of Invention
The invention aims to solve the technical problems of low tensile strength of epoxy resin, high linear expansion coefficient and low bonding strength of concrete, and provides a concrete protective material with high tensile strength, low linear expansion coefficient and high bonding strength of concrete.
A second object of the present invention is to provide a method for preparing a concrete protective material.
In order to achieve the first object, the present invention adopts the following technical scheme:
the concrete protective material consists of A, B double components mixed according to a mass ratio of 5:1, wherein the component A consists of the following components in parts by weight: 100 parts of modified epoxy resin, 10-20 parts of diluent, 2-4 parts of thixotropic agent and 100-150 parts of titanium powder;
the component B consists of the following components in parts by weight: 30-35 parts of curing agent and 3-6 parts of curing accelerator;
the modified epoxy resin is cube cage type silsesquioxane and nitrile rubber synergistic modified epoxy resin, the thermal decomposition temperature of the epoxy resin can be effectively improved by adopting the cube cage type silsesquioxane and nitrile rubber synergistic modified epoxy resin, the silsesquioxane isolates the thermal erosion effect of the outside on the matrix inside the composite material on the surface of the composite material, the effect of toughening modification is achieved on the epoxy resin, the impact strength and the tensile strength of the epoxy resin are improved, meanwhile, the bearing capacity of the resin can be improved by the synergistic nitrile rubber modification, the bonding performance between the epoxy resin and concrete is improved, the resin is not easy to crack under the effect of blending shearing, the hydroxyl group and the methoxy group in the cage type structure react with the hydroxyl group in the epoxy resin, the cube cage type silsesquioxane and the epoxy resin are crosslinked through chemical bonds under the effect of a curing agent, the effect of certain network dielectric is achieved, the synergistic nitrile rubber modification can greatly improve the toughness, the impact strength and the peeling strength, the effect of stress dispersion and the impact bearing can be achieved to a certain extent when the material is subjected to the impact, the fracture coefficient of the material is increased, the coefficient of linear expansion is reduced, the expansion coefficient is not easy to be produced, the thixotropic expansion coefficient is reduced, the expansion coefficient is not produced, the thixotropic material is not is reduced, the expansion coefficient is reduced, the production cost is reduced, and the expansion coefficient is not can be adjusted, and the titanium is stable, and the concrete is stable when used in the concrete is in use, and the bridge expansion is stable.
Preferably, the mass ratio of the cubic cage type silsesquioxane to the nitrile rubber is 5:7, and the toughness of the resin can be increased by adopting the cubic cage type silsesquioxane and nitrile rubber co-modified epoxy resin with the mass ratio of 5:7, so that the resin is not easy to crack under the action of cyclic shearing, more preferably, the carboxyl end-capped nitrile rubber and the cubic cage type silsesquioxane co-modified epoxy resin are adopted, when the mass ratio is 5:7, the interaction reaction is sufficient, the rigid-flexible combined two-phase performance is fully reflected, the epoxy resin has good high temperature resistance, oxidation resistance, chemical stability and lubricating performance, and the unique terminal carboxyl structure of the nitrile rubber can migrate to the surface layer to interact with epoxy groups, so that the free energy of the surface is reduced, the corrosion resistance of the polymer is improved, and the formed epoxy resin three-dimensional crosslinked network structure can play a good role in stress dispersion.
Preferably, the preparation method of the modified epoxy resin comprises the following steps:
mixing and stirring cubic cage type silsesquioxane and epoxy resin at the speed of 800r/min at the temperature of 80 ℃ for 30min, heating to 120 ℃, adding nitrile rubber and silane coupling agent KH550, stirring at the speed of 800r/min at the temperature of 100 ℃ for 40-50min to obtain modified epoxy resin, firstly blending the cubic cage type silsesquioxane and the epoxy resin, finally adding carboxyl end-capped nitrile rubber and silane coupling agent, firstly introducing a cage type structure, and then blending the nitrile rubber and the epoxy resin, thereby the preparation method is simple, the operation is convenient, and the prepared modified epoxy resin is used for a concrete protective material, thereby solving the technical problems of lower tensile strength of the epoxy resin, high linear expansion coefficient and low bonding strength of the concrete.
Preferably, the epoxy resin is any one of bisphenol a type epoxy resin and bisphenol F type epoxy resin.
Preferably, the addition amount of the cubic cage type silsesquioxane is 10-15% of the mass fraction of the epoxy resin.
Preferably, the thixotropic agent is fumed silica.
Preferably, the curing agent is methyl hexahydrophthalic anhydride, and the curing accelerator is tertiary amine accelerator.
Preferably, the particle size of the titanium powder is 800-1000 meshes.
Preferably, the diluent is any one of phenyl glycidyl ether, propenyl glycidyl ether and butyl glycidyl ether.
In order to achieve the second object, the present invention adopts the following technical scheme:
a method of preparing a concrete protective material as claimed in any one of the preceding claims, comprising the steps of:
s1, mixing and fully dispersing modified epoxy resin, a diluent and a thixotropic agent in the component A according to a proportion to obtain a resin prepolymer, adding titanium powder into the prepolymer, and carrying out vacuum defoaming to obtain the component A;
s2, mechanically stirring the curing agent and the curing accelerator of the component B in proportion for 30-60min, uniformly mixing, and carrying out vacuum defoaming to obtain the component B;
and S3, independently storing the component A obtained in the step S1 and the component B obtained in the step S2 according to a mass ratio of 5:1.
Compared with the prior art, the invention has the following advantages:
1. according to the concrete protective material, the thermal decomposition temperature of the epoxy resin can be effectively improved by adopting the cube cage type silsesquioxane and the nitrile rubber to cooperatively modify the epoxy resin, the silsesquioxane isolates the external thermal erosion effect on the matrix inside the composite material on the surface of the composite material, the toughening modification effect on the epoxy resin is achieved, the impact strength and the tensile strength of the epoxy resin are improved, meanwhile, the nitrile rubber is cooperatively modified, the bearing capacity of the resin can be improved, the bonding performance between the epoxy resin and concrete is improved, the resin is not easy to crack under the action of blending shearing, the hydroxyl group and the methoxy group in the cage type structure react with the hydroxyl group in the epoxy resin, the cube cage type silsesquioxane and the epoxy resin are crosslinked through chemical bonds under the action of a curing agent, the synergized nitrile rubber modification can greatly improve the toughness, the impact strength and the peeling strength, the stress dispersion and the bearing effect can be achieved to a certain extent when the material is impacted, the fracture performance of the material is improved, and the linear expansion coefficient is reduced, and the concrete protective material is not easy to produce in service or burst under the action of the concrete surface protection.
2. According to the preparation method of the concrete protective material, the component A is prepared firstly, and the titanium powder is added finally, so that the thixotropic property of epoxy resin can be improved, the dosage of the thixotropic agent fumed silica is reduced, the operation is simple and quick, and the prepared A, B component can be used for a protective coating of concrete after being mixed.
Detailed Description
The following describes the specific technical scheme of the present invention in connection with specific examples 1 to 3:
example 1:
the preparation method of the concrete protective material comprises the following steps:
s1, mixing and fully dispersing modified epoxy resin, a diluent and a thixotropic agent in the component A according to the proportion of the table 1, controlling the dispersing rotating speed to 800r/min to obtain a resin prepolymer, adding titanium powder into the prepolymer, controlling the dispersing rotating speed to 1200r/min, controlling the dispersing time to 60min, and performing vacuum defoaming under minus 0.08MPa to obtain the component A;
s2, mechanically stirring the curing agent and the curing accelerator of the component B for 30min according to the proportion of the table 1, controlling the dispersion rotating speed to be 600r/min, uniformly mixing, and carrying out vacuum defoaming under negative pressure of-0.08 MPa to obtain the component B;
and S3, uniformly mixing the component A obtained in the step S1 and the component B obtained in the step S2 according to the mass ratio of 5:1.
Example 2:
the preparation method of the concrete protective material comprises the following steps:
s1, mixing and fully dispersing modified epoxy resin, a diluent and a thixotropic agent in the component A according to the proportion of the table 1, controlling the dispersing rotating speed to 900r/min to obtain a resin prepolymer, adding titanium powder into the prepolymer, controlling the dispersing rotating speed to 1500r/min, controlling the dispersing time to 60min, and performing vacuum defoaming under minus 0.08MPa to obtain the component A;
s2, mechanically stirring the curing agent and the curing accelerator of the component B for 40min according to the proportion of the table 1, controlling the dispersion rotating speed to be 700r/min, uniformly mixing, and carrying out vacuum defoaming under negative pressure of-0.08 MPa to obtain the component B;
and S3, uniformly mixing the component A obtained in the step S1 and the component B obtained in the step S2 according to the mass ratio of 5:1.
Example 3:
the preparation method of the concrete protective material comprises the following steps:
s1, mixing and fully dispersing modified epoxy resin, a diluent and a thixotropic agent in the component A according to the proportion of the table 1, controlling the dispersion rotating speed to be 1000r/min to obtain a resin prepolymer, adding titanium powder into the prepolymer, controlling the dispersion rotating speed to be 1600r/min, controlling the dispersion time to be 60min, and carrying out vacuum defoaming under minus 0.08MPa to obtain the component A;
s2, mechanically stirring the curing agent and the curing accelerator of the component B for 60min according to the proportion of the table 1, controlling the dispersion rotating speed to be 900r/min, uniformly mixing, and carrying out vacuum defoaming under negative pressure of-0.08 MPa to obtain the component B;
and S3, uniformly mixing the component A obtained in the step S1 and the component B obtained in the step S2 according to the mass ratio of 5:1.
Table 1: the composition ratios of the concrete protective materials in examples 1 to 3
Each of the examples and comparative examples (commercially available epoxy resin concrete protective materials) was tested for tensile strength, compressive strength, elongation at break, impact strength properties according to the following standard GB/T2567-2008 "test method for resin casting Property", and the adhesive properties and thermal expansion coefficients were tested according to the DL/T5193-2004 "epoxy resin mortar technical Specification", and the results of the test data of the properties are shown in Table 2.
Table 2: test results of examples 1-3 and comparative examples (commercially available epoxy resin concrete protective Material)
As can be seen from the data in Table 2, the concrete protective material can remarkably improve the tensile strength and elongation at break of the epoxy resin used for the concrete protective material, the thermal decomposition temperature of the epoxy resin can be effectively improved by adopting the cube cage type silsesquioxane and the nitrile rubber to cooperatively modify the epoxy resin, the silsesquioxane isolates the external thermal erosion effect on the matrix in the composite material on the surface of the composite material, the effect of toughening modification is achieved on the epoxy resin, the impact strength and the tensile strength of the epoxy resin are improved, meanwhile, the supporting capacity of the epoxy resin can be improved by cooperating with the nitrile rubber modification, the bonding performance between the epoxy resin and the concrete is improved, the resin is not easy to crack under the action of blending shearing, the hydroxy and methoxy groups in the cage type structure react with the hydroxy groups in the epoxy resin, the cube cage type silsesquioxane and the epoxy resin are crosslinked through chemical bonds under the action of a curing agent, the synergic nitrile rubber modification can greatly improve the toughness, the impact strength and the peeling strength, the impact resistance can be easily dispersed and borne to a certain extent when the material is impacted, the silicon dioxide is easy to produce the stress dispersion and bear the impact resistance, the epoxy resin is easy to produce the stress crack, the epoxy resin can be easily expanded, the epoxy resin can be prepared, the thixotropic agent can be used for preparing the concrete, and the protective powder can be rapidly prepared, and the protective coating can be used for the crack after the concrete is prepared, and the concrete has the surface has the advantages of being used for preparing the protective coating is A, B.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (10)
1. A concrete protective material, characterized in that: the composite material consists of A, B bi-components mixed according to a mass ratio of 5:1, wherein the component A consists of the following components in parts by weight: 100 parts of modified epoxy resin, 10-20 parts of diluent, 2-4 parts of thixotropic agent and 100-150 parts of titanium powder;
the component B consists of the following components in parts by weight: 30-35 parts of curing agent and 3-6 parts of curing accelerator;
the modified epoxy resin is a synergic modified epoxy resin of cubic cage type silsesquioxane and nitrile rubber.
2. The concrete protective material according to claim 1, wherein: the mass ratio of the cubic cage type silsesquioxane to the nitrile rubber is 5:7.
3. The concrete protective material according to claim 1, wherein: the preparation method of the modified epoxy resin comprises the following steps:
mixing and stirring cubic cage type silsesquioxane and epoxy resin at the speed of 800r/min at 80 ℃ for 30min, heating to 120 ℃, adding nitrile rubber and a silane coupling agent KH550, and stirring at the speed of 800r/min at 100 ℃ for 40-50min to obtain the modified epoxy resin.
4. A concrete protective material according to claim 3, characterized in that: the epoxy resin is any one of bisphenol A epoxy resin and bisphenol F epoxy resin.
5. A concrete protective material according to claim 3, characterized in that: the addition amount of the cubic cage type silsesquioxane is 10-15% of the mass fraction of the epoxy resin.
6. The concrete protective material according to claim 1, wherein: the thixotropic agent is fumed silica.
7. The concrete protective material according to claim 1, wherein: the curing agent is methyl hexahydrophthalic anhydride, and the curing accelerator is tertiary amine accelerator.
8. The concrete protective material according to claim 1, wherein: the grain size of the titanium powder is 800-1000 meshes.
9. The concrete protective material according to claim 1, wherein: the diluent is any one of phenyl glycidyl ether, propenyl glycidyl ether and butyl glycidyl ether.
10. A method for preparing a concrete protective material according to any one of claims 1 to 9, comprising the steps of:
s1, mixing and fully dispersing modified epoxy resin, a diluent and a thixotropic agent in the component A according to a proportion to obtain a resin prepolymer, adding titanium powder into the prepolymer, and carrying out vacuum defoaming to obtain the component A;
s2, mechanically stirring the curing agent and the curing accelerator of the component B in proportion for 30-60min, uniformly mixing, and carrying out vacuum defoaming to obtain the component B;
and S3, independently storing the component A obtained in the step S1 and the component B obtained in the step S2 according to the mass ratio of 6:1.
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