CN114933446A - Anti-erosion anti-crack polymer mortar and preparation method thereof - Google Patents
Anti-erosion anti-crack polymer mortar and preparation method thereof Download PDFInfo
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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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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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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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
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- 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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Abstract
The invention discloses erosion-resistant anti-crack polymer mortar and a preparation method thereof, and relates to the technical field of building materials. The preparation method comprises the steps of reacting glass fiber with vinyl triethoxysilane to prepare pre-modified glass fiber, reacting the pre-modified glass fiber with methyl diallyl silane and hydrogen peroxide in sequence to prepare modified glass fiber, mixing sodium hydroxide and water glass to obtain an alkali activator, mixing metakaolin, fly ash and quartz sand to obtain a premix, and mixing the modified glass fiber, the alkali activator, the premix, polyvinyl alcohol, nano silicon dioxide, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane to prepare the anti-erosion and anti-crack polymer mortar. The erosion-resistant anti-crack polymer mortar prepared by the invention has excellent erosion resistance and cleavage tensile property.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to erosion-resistant anti-cracking polymer mortar and a preparation method thereof.
Background
The polymer mortar is a new building material emerging from engineering in recent years, and is formed by stirring cement, aggregate and organic polymer capable of being dispersed in water. The polymer may be a homopolymer obtained by polymerizing one monomer, or a copolymer obtained by polymerizing two or more monomers. The polymer must form a film under ambient conditions to coat the cement particles and form a strong bond between the cement body and the aggregate. The polymer network must have the ability to resist microcracking and crack propagation.
The polymer mortar can play roles in waterproofing, protecting, repairing and reinforcing a building main body, has a great application prospect in the fields of water conservancy, municipal administration, roads and bridges, underground and the like, and is expected to become a novel green cementing material for replacing cement. However, in addition to bearing normal loads, building structures and their components may be impacted by external objects and eroded by fluids during their service life, and thus, there is a need to provide a polymer mortar having good erosion and impact resistance.
Disclosure of Invention
The invention aims to provide an anti-erosion anti-crack polymer mortar and a preparation method thereof, and aims to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
the preparation method of the erosion-resistant and crack-resistant polymer mortar is characterized in that the erosion-resistant and crack-resistant polymer mortar is prepared by mixing modified glass fiber, an alkali activator, a premix, polyvinyl alcohol, nano silicon dioxide, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane.
Preferably, the modified glass fiber is prepared by reacting glass fiber with vinyltriethoxysilane to prepare pre-modified glass fiber, and reacting the pre-modified glass fiber with methyldiallylsilane and hydrogen peroxide in sequence.
Preferably, the alkali activator is formed by mixing sodium hydroxide and water glass.
Preferably, the premix is prepared by mixing metakaolin, fly ash and quartz sand.
As optimization, the preparation method of the erosion-resistant and crack-resistant polymer mortar comprises the following preparation steps:
(1) pre-modification: mixing glass fiber, vinyltriethoxysilane, absolute ethyl alcohol and pure water according to a mass ratio of 1: 1: 6: 6-2: 1: 8: 8, uniformly mixing, stirring for 4-5 hours at 70-80 ℃ at 800-1000 r/min, filtering, washing for 3-5 times by using absolute ethyl alcohol, drying for 4-6 hours at 90-100 ℃ under 80-90 kPa, and standing for 30-40 minutes at 120-130 ℃ to obtain pre-modified glass fibers;
(2) branched growth and epoxidation: pre-modified glass fiber, methyl diallyl silane and normal hexane are mixed according to the mass ratio of 2: 1: 10-3: 1: 15, uniformly mixing, adding chloroplatinic acid with the mass of 0.01-0.03 of that of the pre-modified glass fiber, stirring and reacting for 4-6 h at 70-80 ℃ at 800-1000 r/min, then adding methyldiallylsilane with the mass of 0.8-1.2 times of that of the pre-modified glass fiber, continuously stirring and reacting for 4-6 h, filtering, washing for 3-5 times by using absolute ethyl alcohol, drying for 8-10 h at 60-70 ℃, then placing in an organic solvent with the mass of 10-12 times of that of the pre-modified glass fiber, adding hydrogen peroxide with the mass fraction of 20-30% of that of the pre-modified glass fiber and a chloroporphyrin manganese complex with the mass of 0.01-0.03 time of the pre-modified glass fiber, stirring and reacting for 8-10 h at 10-20 ℃ at 300-500 r/min, filtering, washing for 3-5 times by using the absolute ethyl alcohol, and drying for 8-10 h at 60-70 ℃ to prepare the modified glass fiber;
(3) mixing materials: modified glass fiber, alkali activator, premix, polyvinyl alcohol, nano silicon dioxide, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane according to the mass ratio of 3: 5: 10: 1: 0.01: 1: 0.03: 0.05-4: 6: 12: 2: 0.03: 1.6: 0.05: 0.07, uniformly mixing, and stirring at the temperature of 20-40 ℃ and at the speed of 600-800 r/min for 3-5 min to prepare the erosion-resistant and crack-resistant polymer mortar.
Preferably, the organic solvent in the step (2) is prepared by mixing acetic acid, dichloromethane and acetonitrile in a mass ratio of 1: 4: 8-1: 5: 10 are mixed evenly to prepare the product.
Preferably, the alkali-activator in the step (3) is prepared by mixing sodium hydroxide and water glass according to a mass ratio of 3: 18-3: 20, uniformly mixing, stirring at the temperature of 20-40 ℃ and at the speed of 500-1000 r/min for 2-3 min, and preparing.
As an optimization, the premix in the step (3) is prepared by mixing metakaolin, fly ash and quartz sand 2: 1: 3-3: 1: 4, uniformly mixing, and stirring at 10-30 ℃ for 2-3 min at 500-1000 r/min.
Preferably, the metakaolin is of the type BASF SP-33.
Optimally, the particle size of the fly ash is less than 100 mu m; the particle size of the quartz sand is less than 7 mm.
Compared with the prior art, the invention has the following beneficial effects:
when the erosion-resistant and crack-resistant polymer mortar is prepared, firstly, sodium hydroxide and water glass are mixed into an alkali activator, metakaolin, fly ash and quartz sand are mixed into a premix, and modified glass fiber, the alkali activator, the premix, polyvinyl alcohol, nano-silica, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane are mixed to prepare the erosion-resistant and crack-resistant polymer mortar.
Firstly, a silica covalent bond and an alumina covalent bond in the components are exercised under the action of hydroxide ions of an alkali activator to form a silica tetrahedral monomer and an alumina tetrahedral monomer, the dissolved silica tetrahedral monomer and the dissolved alumina tetrahedral monomer are continuously diffused and promote more component dissolution reactions containing the silica covalent bond and the alumina covalent bond, the silica tetrahedral monomer and the alumina tetrahedral monomer are subjected to polycondensation reaction in a reaction system to form an amorphous sol high polymer with a chain, sheet or three-dimensional network structure, and the amorphous sol high polymer is further dehydrated, polymerized and finally hardened, so that the polymer mortar has good mechanical properties after being used.
Secondly, the glass fiber reacts with vinyl triethoxysilane to prepare a pre-modified glass fiber, the pre-modified glass fiber reacts with methyl diallyl silane to carry out branching growth, the pre-modified glass fiber is epoxidized with hydrogen peroxide to prepare the modified glass fiber, hyperbranched polycarbosilane is formed on the surface of the pre-modified glass fiber due to the branching growth, subsequently formed epoxy crosslinking sites are increased, the protection and protection effects on the main body are increased due to the hyperbranched structure, the carbon-carbon double bond edge end of the hyperbranched polycarbosilane is oxidized into an epoxy group due to the epoxidation, the epoxy group can be subsequently crosslinked with an inorganic main body through aminopropyltriethoxysilane to form an organic-inorganic composite crosslinking network structure, and the erosion resistance and the splitting tensile property of the polymer mortar are improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to more clearly illustrate the method provided by the present invention, the following examples are provided to illustrate the method of testing the erosion resistant and crack resistant polymer mortar prepared in the following examples, wherein the method comprises the following steps:
erosion resistance: the erosion-resistant and anti-crack polymer mortar obtained in each example and a comparative example material are cured and shaped into a solid block with the same shape and mass, air flow erosion treatment is carried out for the same time under the same condition, the surface is cleaned, then the solid block is dried and weighed, and the erosion amount is calculated to be the initial mass-the mass after erosion.
Splitting tensile property: the erosion-resistant and crack-resistant polymer mortar obtained in each example and a comparative example material are cured and shaped into a solid block with the same size and shape, and the tensile strength is tested according to GB/T50081-2002.
Example 1
The preparation method of the erosion-resistant and anti-crack polymer mortar mainly comprises the following preparation steps:
(1) pre-modification: mixing glass fiber, vinyltriethoxysilane, absolute ethyl alcohol and pure water according to a mass ratio of 1: 1: 6: 6, uniformly mixing, stirring for 5 hours at 70 ℃ at 800r/min, filtering, washing for 3 times by using absolute ethyl alcohol, drying for 6 hours at 90 ℃ under 80kPa, and standing for 40 minutes at 120 ℃ to obtain pre-modified glass fiber;
(2) branched growth and epoxidation: mixing acetic acid, dichloromethane and acetonitrile in a mass ratio of 1: 4: 8, uniformly mixing to prepare an organic solvent; pre-modified glass fiber, methyl diallyl silane and normal hexane are mixed according to the mass ratio of 2: 1: 10, uniformly mixing, adding chloroplatinic acid with the mass of 0.01 of that of the pre-modified glass fiber, stirring and reacting for 6 hours at 70 ℃ at 800r/min, then adding methyldiallylsilane with the mass of 0.8 time of that of the pre-modified glass fiber, continuously stirring and reacting for 4 hours, filtering, washing for 3 times by using absolute ethyl alcohol, drying for 10 hours at 60 ℃, then placing in an organic solvent with the mass of 10 times of that of the pre-modified glass fiber, adding hydrogen peroxide with the mass fraction of 20 percent and the mass fraction of 2 times of that of the pre-modified glass fiber and a chloroporphyrin manganese complex with the mass of 0.01 time of that of the pre-modified glass fiber, stirring and reacting for 10 hours at 10 ℃ at 300r/min, filtering, washing for 3 times by using absolute ethyl alcohol, and drying for 10 hours at 60 ℃ to prepare the modified glass fiber;
(3) mixing materials: sodium hydroxide and water glass are mixed according to the mass ratio of 3: 18, mixing uniformly, stirring at 20 ℃ and 500r/min for 3min to prepare an alkali activator; mixing metakaolin, fly ash and quartz sand 2: 1: 3, uniformly mixing, and stirring at 10 ℃ for 3min at 500r/min to obtain a premix; modified glass fiber, alkali activator, premix, polyvinyl alcohol, nano silicon dioxide, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane according to the mass ratio of 3: 5: 10: 1: 0.01: 1: 0.03: 0.05, and stirring for 5min at the temperature of 20 ℃ and the speed of 600r/min to prepare the erosion-resistant and crack-resistant polymer mortar.
Example 2
The preparation method of the erosion-resistant and anti-crack polymer mortar mainly comprises the following preparation steps:
(1) pre-modification: glass fiber, vinyltriethoxysilane, absolute ethyl alcohol and pure water are mixed according to the mass ratio of 1.5: 1: 7: 7, uniformly mixing, stirring at 75 ℃ and 900r/min for 4.5h, filtering, washing with absolute ethyl alcohol for 4 times, drying at 95 ℃ and 85kPa for 5h, and standing at 125 ℃ for 35min to obtain pre-modified glass fiber;
(2) branched growth and epoxidation: mixing acetic acid, dichloromethane and acetonitrile according to a mass ratio of 1: 4.5: 9, mixing uniformly to prepare an organic solvent; pre-modified glass fiber, methyldiallylsilane and normal hexane are mixed according to the mass ratio of 2.5: 1: 12, uniformly mixing, adding chloroplatinic acid with the mass of 0.02 of the pre-modified glass fiber, stirring and reacting for 5 hours at 75 ℃ and 900r/min, adding methyldiallylsilane with the mass of 1 time of the pre-modified glass fiber, continuously stirring and reacting for 5 hours, filtering, washing for 4 times by using absolute ethyl alcohol, drying for 9 hours at 65 ℃, then placing in an organic solvent with the mass of 11 times of the pre-modified glass fiber, adding hydrogen peroxide with the mass fraction of 25 percent and the mass fraction of 2.5 times of the mass of the pre-modified glass fiber and a chlorinated porphyrin manganese complex with the mass of 0.02 time of the pre-modified glass fiber, stirring and reacting for 9 hours at 15 ℃ and 400r/min, filtering, washing for 4 times by using the absolute ethyl alcohol, and drying for 9 hours at 65 ℃ to obtain the modified glass fiber;
(3) mixing materials: mixing sodium hydroxide and water glass according to a mass ratio of 3: 19, uniformly mixing, stirring at 30 ℃ and 800r/min for 2.5min to prepare an alkali activator; mixing metakaolin, fly ash and quartz sand 2.5: 1: 3.5, uniformly mixing, and stirring at 20 ℃ and 800r/min for 2.5min to obtain a premix; modified glass fiber, alkali activator, premix, polyvinyl alcohol, nano-silica, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane are mixed according to the mass ratio of 3.5: 5.5: 11: 1.5: 0.02: 1.3: 0.04: 0.06 percent of the components are uniformly mixed and stirred for 4min at the temperature of 30 ℃ and the speed of 700r/min, thus obtaining the erosion-resistant and anti-crack polymer mortar.
Example 3
The preparation method of the erosion-resistant and anti-crack polymer mortar mainly comprises the following preparation steps:
(1) pre-modification: mixing glass fiber, vinyl triethoxysilane, absolute ethyl alcohol and pure water according to a mass ratio of 2: 1: 8: 8, uniformly mixing, stirring at 80 ℃ for 4h at 1000r/min, filtering, washing with absolute ethyl alcohol for 5 times, drying at 100 ℃ for 4h under 90kPa, and standing at 130 ℃ for 30min to obtain pre-modified glass fiber;
(2) branched growth and epoxidation: mixing acetic acid, dichloromethane and acetonitrile according to a mass ratio of 1: 5: 10 mixing uniformly to prepare an organic solvent; pre-modified glass fiber, methyldiallylsilane and normal hexane are mixed according to the mass ratio of 3: 1: 15, uniformly mixing, adding chloroplatinic acid with the mass of 0.01 of that of the pre-modified glass fiber, stirring and reacting for 4 hours at 80 ℃ at 1000r/min, then adding methyldiallylsilane with the mass of 1.2 of that of the pre-modified glass fiber, continuously stirring and reacting for 4 hours, filtering, washing for 5 times by using absolute ethyl alcohol, drying for 8 hours at 70 ℃, then placing in an organic solvent with the mass of 12 times that of the pre-modified glass fiber, adding hydrogen peroxide with the mass fraction of 30 percent and the mass fraction of 3 times that of the pre-modified glass fiber and a chlorinated porphyrin manganese complex with the mass of 0.01 time that of the pre-modified glass fiber, stirring and reacting for 8 hours at 20 ℃ at 500r/min, filtering, washing for 5 times by using the absolute ethyl alcohol, and drying for 8 hours at 70 ℃ to prepare the modified glass fiber;
(3) mixing materials: sodium hydroxide and water glass are mixed according to the mass ratio of 3: 20, uniformly mixing, stirring at 40 ℃ at 1000r/min for 2min, and preparing an alkali activator; mixing metakaolin, fly ash and quartz sand 3: 1: 4, uniformly mixing, and stirring at 30 ℃ at 1000r/min for 2min to obtain a premix; modified glass fiber, alkali activator, premix, polyvinyl alcohol, nano silicon dioxide, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane according to the mass ratio of 4: 6: 12: 2: 0.03: 1.6: 0.05: 0.07, and stirring for 3min at 40 ℃ at 800r/min to prepare the erosion-resistant and crack-resistant polymer mortar.
Comparative example 1
The preparation method of the erosion-resistant and anti-crack polymer mortar mainly comprises the following preparation steps:
(1) pre-modification: glass fiber, vinyltriethoxysilane, absolute ethyl alcohol and pure water are mixed according to the mass ratio of 1.5: 1: 7: 7, uniformly mixing, stirring at 75 ℃ and 900r/min for 4.5h, filtering, washing with absolute ethyl alcohol for 4 times, drying at 95 ℃ and 85kPa for 5h, and standing at 125 ℃ for 35min to obtain pre-modified glass fiber;
(2) and (3) branched growth: mixing acetic acid, dichloromethane and acetonitrile according to a mass ratio of 1: 4.5: 9, mixing uniformly to prepare an organic solvent; pre-modified glass fiber, methyldiallylsilane and normal hexane are mixed according to the mass ratio of 2.5: 1: 12, uniformly mixing, adding chloroplatinic acid with the mass of 0.02 of the pre-modified glass fiber, stirring and reacting for 5 hours at 75 ℃ at 900r/min, adding methyldiallylsilane with the mass of 1 time of the pre-modified glass fiber, continuously stirring and reacting for 5 hours, filtering, washing for 4 times by using absolute ethyl alcohol, and drying for 9 hours at 65 ℃ to obtain the modified glass fiber;
(3) mixing materials: sodium hydroxide and water glass are mixed according to the mass ratio of 3: 19, uniformly mixing, stirring at 30 ℃ and 800r/min for 2.5min to prepare an alkali activator; mixing metakaolin, fly ash and quartz sand 2.5: 1: 3.5, uniformly mixing, and stirring at 20 ℃ and 800r/min for 2.5min to obtain a premix; modified glass fiber, alkali activator, premix, polyvinyl alcohol, nano-silica, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane are mixed according to the mass ratio of 3.5: 5.5: 11: 1.5: 0.02: 1.3: 0.04: 0.06, and stirring for 4min at the temperature of 30 ℃ and at the speed of 700r/min to prepare the erosion-resistant and anti-crack polymer mortar.
Comparative example 2
The preparation method of the erosion-resistant and anti-crack polymer mortar mainly comprises the following preparation steps:
(1) modification: mixing glass fiber, vinyl triethoxysilane, absolute ethyl alcohol and pure water according to a mass ratio of 1.5: 1: 7: 7, uniformly mixing, stirring at 75 ℃ and 900r/min for 4.5h, filtering, washing with absolute ethyl alcohol for 4 times, drying at 95 ℃ and 85kPa for 5h, and standing at 125 ℃ for 35min to obtain pre-modified glass fiber;
(2) epoxidation: mixing acetic acid, dichloromethane and acetonitrile according to a mass ratio of 1: 4.5: 9, uniformly mixing to prepare an organic solvent; placing the pre-modified glass fiber in an organic solvent with the mass being 11 times that of the pre-modified glass fiber, adding hydrogen peroxide with the mass fraction being 25% and the mass fraction being 2.5 times that of the pre-modified glass fiber and a chlorinated porphyrin manganese complex with the mass being 0.02 time that of the pre-modified glass fiber, stirring and reacting for 9 hours at 15 ℃ and 400r/min, filtering and washing for 4 times by using absolute ethyl alcohol, and drying for 9 hours at 65 ℃ to obtain the modified glass fiber;
(3) mixing materials: mixing sodium hydroxide and water glass according to a mass ratio of 3: 19, uniformly mixing, stirring at 30 ℃ and 800r/min for 2.5min to prepare an alkali activator; mixing metakaolin, fly ash and quartz sand 2.5: 1: 3.5, uniformly mixing, and stirring at 20 ℃ and 800r/min for 2.5min to obtain a premix; modified glass fiber, alkali activator, premix, polyvinyl alcohol, nano silicon dioxide, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane according to the mass ratio of 3.5: 5.5: 11: 1.5: 0.02: 1.3: 0.04: 0.06 percent of the components are uniformly mixed and stirred for 4min at the temperature of 30 ℃ and the speed of 700r/min, thus obtaining the erosion-resistant and anti-crack polymer mortar.
Comparative example 3
The preparation method of the erosion-resistant and anti-crack polymer mortar mainly comprises the following preparation steps:
mixing materials: mixing sodium hydroxide and water glass according to a mass ratio of 3: 19, uniformly mixing, stirring at 30 ℃ and 800r/min for 2.5min to prepare an alkali activator; mixing metakaolin, fly ash and quartz sand 2.5: 1: 3.5, uniformly mixing, and stirring at 20 ℃ and 800r/min for 2.5min to obtain a premix; glass fiber, alkali activator, premix, polyvinyl alcohol, nano silicon dioxide, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane are mixed according to the mass ratio of 3.5: 5.5: 11: 0.04: 0.02: 1.3: 1.5: 0.06, and stirring for 4min at the temperature of 30 ℃ and at the speed of 700r/min to prepare the erosion-resistant and anti-crack polymer mortar.
Examples of effects
The following table 1 shows the performance analysis results of the erosion resistance and the cleavage tensile property of the erosion-resistant and crack-resistant polymer mortar using examples 1 to 3 of the present invention and comparative examples 1 to 3.
TABLE 1
| Amount of erosion | Tensile strength | Amount of erosion | Tensile strength | ||
| Example 1 | 1.33g | 31.7MPa | Comparative example 1 | 3.76g | 24.5MPa |
| Example 2 | 1.28g | 31.9MPa | Comparative example 2 | 4.15g | 22.1MPa |
| Example 3 | 1.32g | 31.4MPa | Comparative example 3 | 4.21g | 18.3MPa |
As can be seen from the comparison of the experimental data of examples 1 to 3 and comparative examples 1 to 3 in Table 1, the erosion-resistant and crack-resistant polymer mortar prepared by the invention has good erosion resistance and cleavage tensile property.
The experimental data comparison of the examples 1, 2 and 3 and the comparative example 1 shows that the examples 1, 2 and 3 have low erosion amount and high tensile strength compared with the comparative example 1, which indicates that the epoxidation treatment is performed to oxidize the carbon-carbon double bond edge end of the hyperbranched polycarbosilane formed by the branched growth on the surface of the pre-modified glass fiber into an epoxy group, and the epoxy group can be subsequently crosslinked with the inorganic main body phase through aminopropyltriethoxysilane to form an organic-inorganic composite crosslinked network structure, so that the erosion resistance and the cleavage tensile property of the erosion-resistant and crack-resistant polymer mortar are improved; from the comparison of the experimental data of examples 1, 2, 3 and comparative example 2, it can be seen that the examples 1, 2, 3 have lower erosion amount and higher tensile strength than comparative example 2, which indicates that the hyperbranched polycarbosilane is formed on the surface of the pre-modified glass fiber by branching growth, the subsequently formed epoxy crosslinking sites are increased, and the hyperbranched structure increases the protection effect on the main body, thereby improving the erosion resistance and the cleavage tensile property of the erosion-resistant and crack-resistant polymer mortar.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The preparation method of the erosion-resistant and anti-crack polymer mortar is characterized in that the erosion-resistant and anti-crack polymer mortar is prepared by mixing modified glass fiber, an alkali activator, a premix, polyvinyl alcohol, nano silicon dioxide, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane.
2. The method for preparing the erosion-resistant and crack-resistant polymer mortar according to claim 1, wherein the modified glass fibers are prepared by reacting glass fibers with vinyltriethoxysilane to prepare pre-modified glass fibers, and reacting the pre-modified glass fibers with methyldiallylsilane and hydrogen peroxide in sequence.
3. The method for preparing the erosion and crack resistant polymer mortar according to claim 1, wherein the alkali activator is formed by mixing sodium hydroxide and water glass.
4. The method for preparing the erosion and crack resistant polymer mortar according to claim 1, wherein the premix is prepared by mixing metakaolin, fly ash and quartz sand.
5. The preparation method of the erosion resistant and crack resistant polymer mortar according to claim 1, wherein the preparation method of the erosion resistant and crack resistant polymer mortar comprises the following preparation steps:
(1) pre-modification: mixing glass fiber, vinyltriethoxysilane, absolute ethyl alcohol and pure water according to a mass ratio of 1: 1: 6: 6-2: 1: 8: 8, uniformly mixing, stirring for 4-5 hours at 70-80 ℃ at 800-1000 r/min, filtering, washing for 3-5 times by using absolute ethyl alcohol, drying for 4-6 hours at 90-100 ℃ under 80-90 kPa, and standing for 30-40 minutes at 120-130 ℃ to obtain pre-modified glass fibers;
(2) branched growth and epoxidation: pre-modified glass fiber, methyl diallyl silane and normal hexane are mixed according to the mass ratio of 2: 1: 10-3: 1: 15, uniformly mixing, adding chloroplatinic acid with the mass of 0.01-0.03 of that of the pre-modified glass fiber, stirring and reacting for 4-6 h at 70-80 ℃ at 800-1000 r/min, then adding methyldiallylsilane with the mass of 0.8-1.2 times of that of the pre-modified glass fiber, continuously stirring and reacting for 4-6 h, filtering, washing for 3-5 times by using absolute ethyl alcohol, drying for 8-10 h at 60-70 ℃, then placing in an organic solvent with the mass of 10-12 times of that of the pre-modified glass fiber, adding hydrogen peroxide with the mass fraction of 20-30% of that of the pre-modified glass fiber and a chloroporphyrin manganese complex with the mass of 0.01-0.03 time of the pre-modified glass fiber, stirring and reacting for 8-10 h at 10-20 ℃ at 300-500 r/min, filtering, washing for 3-5 times by using absolute ethyl alcohol, and drying for 8-10 h at 60-70 ℃ to prepare the modified glass fiber;
(3) mixing materials: modified glass fiber, alkali activator, premix, polyvinyl alcohol, nano silicon dioxide, polyvinyl alcohol, pure water, lignosulfonate and aminopropyltriethoxysilane according to the mass ratio of 3: 5: 10: 1: 0.01: 1: 0.03: 0.05-4: 6: 12: 2: 0.03: 1.6: 0.05: 0.07, and stirring for 3-5 min at the temperature of 20-40 ℃ and at the speed of 600-800 r/min to prepare the erosion-resistant and crack-resistant polymer mortar.
6. The method for preparing the erosion and crack resistant polymer mortar according to claim 5, wherein the organic solvent in the step (2) is prepared by mixing acetic acid, dichloromethane and acetonitrile in a mass ratio of 1: 4: 8-1: 5: 10 are mixed evenly to prepare the product.
7. The method for preparing the erosion and crack resistant polymer mortar according to claim 5, wherein the alkali activator in the step (3) is prepared by mixing sodium hydroxide and water glass in a mass ratio of 3: 18-3: 20, uniformly mixing, stirring at the temperature of 20-40 ℃ and at the speed of 500-1000 r/min for 2-3 min, and preparing.
8. The method for preparing the erosion and crack resistant polymer mortar according to claim 5, wherein the premix in the step (3) is prepared by mixing metakaolin, fly ash and quartz sand 2: 1: 3-3: 1: 4, uniformly mixing, and stirring at 10-30 ℃ for 2-3 min at 500-1000 r/min.
9. The method for preparing the impact-resistant and anti-cracking polymer mortar according to claim 8, wherein the metakaolin is BASF SP-33.
10. The method for preparing the erosion and crack resistant polymer mortar according to claim 8, wherein the particle size of the fly ash is less than 100 μm; the particle size of the quartz sand is less than 7 mm.
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