CN119371136A - A concrete composite viscosity enhancer and preparation method thereof - Google Patents
A concrete composite viscosity enhancer and preparation method thereof Download PDFInfo
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- CN119371136A CN119371136A CN202411907060.1A CN202411907060A CN119371136A CN 119371136 A CN119371136 A CN 119371136A CN 202411907060 A CN202411907060 A CN 202411907060A CN 119371136 A CN119371136 A CN 119371136A
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- silica fume
- modified
- polyacrylic resin
- concrete composite
- vinyl
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- 239000004567 concrete Substances 0.000 title claims abstract description 64
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000003623 enhancer Substances 0.000 title 1
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 150000004032 porphyrins Chemical class 0.000 claims abstract description 18
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims abstract description 16
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 13
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 13
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims abstract description 13
- VMAWODUEPLAHOE-UHFFFAOYSA-N 2,4,6,8-tetrakis(ethenyl)-2,4,6,8-tetramethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane Chemical compound C=C[Si]1(C)O[Si](C)(C=C)O[Si](C)(C=C)O[Si](C)(C=C)O1 VMAWODUEPLAHOE-UHFFFAOYSA-N 0.000 claims abstract description 8
- YEOHHQAXGGADFI-UHFFFAOYSA-N OB(O)OC=C.CC(C)(O)C(C)(C)O Chemical compound OB(O)OC=C.CC(C)(O)C(C)(C)O YEOHHQAXGGADFI-UHFFFAOYSA-N 0.000 claims abstract description 5
- AJVBXLXLODZUME-UHFFFAOYSA-N ethenyl(diphenyl)phosphane Chemical compound C=1C=CC=CC=1P(C=C)C1=CC=CC=C1 AJVBXLXLODZUME-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 55
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 46
- 238000002156 mixing Methods 0.000 claims description 36
- 239000000203 mixture Substances 0.000 claims description 35
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 239000000178 monomer Substances 0.000 claims description 24
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 23
- 230000004913 activation Effects 0.000 claims description 22
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000001291 vacuum drying Methods 0.000 claims description 21
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 18
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 18
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims description 16
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 claims description 16
- 238000010992 reflux Methods 0.000 claims description 16
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 15
- 238000002390 rotary evaporation Methods 0.000 claims description 14
- AVPYQKSLYISFPO-UHFFFAOYSA-N 4-chlorobenzaldehyde Chemical compound ClC1=CC=C(C=O)C=C1 AVPYQKSLYISFPO-UHFFFAOYSA-N 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000003480 eluent Substances 0.000 claims description 10
- 238000003818 flash chromatography Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- RJYNTEFVOZNXEM-UHFFFAOYSA-N ethenyl diphenyl phosphate Chemical compound C=1C=CC=CC=1OP(=O)(OC=C)OC1=CC=CC=C1 RJYNTEFVOZNXEM-UHFFFAOYSA-N 0.000 claims description 9
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 8
- 239000011630 iodine Substances 0.000 claims description 8
- 229910052740 iodine Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000010828 elution Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 5
- 238000006277 sulfonation reaction Methods 0.000 claims description 4
- PXWQLAZWAHLPGA-UHFFFAOYSA-N B(O)(O)O.C(=C)CC(O)(C)C(C)(C)O Chemical compound B(O)(O)O.C(=C)CC(O)(C)C(C)(C)O PXWQLAZWAHLPGA-UHFFFAOYSA-N 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 9
- 229920002125 Sokalan® Polymers 0.000 abstract description 4
- 239000004584 polyacrylic acid Substances 0.000 abstract description 4
- 230000000379 polymerizing effect Effects 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract 3
- 229920005989 resin Polymers 0.000 abstract 3
- 150000003871 sulfonates Chemical class 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 239000002245 particle Substances 0.000 description 7
- 150000004714 phosphonium salts Chemical group 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- BMQDAIUNAGXSKR-UHFFFAOYSA-N (3-hydroxy-2,3-dimethylbutan-2-yl)oxyboronic acid Chemical group CC(C)(O)C(C)(C)OB(O)O BMQDAIUNAGXSKR-UHFFFAOYSA-N 0.000 description 4
- 206010016807 Fluid retention Diseases 0.000 description 4
- 239000002318 adhesion promoter Substances 0.000 description 4
- 125000005619 boric acid group Chemical group 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 125000000068 chlorophenyl group Chemical group 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 125000000542 sulfonic acid group Chemical group 0.000 description 3
- ZZPNDIHOQDQVNU-UHFFFAOYSA-N 2-hydroxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane Chemical group CC1(C)OB(O)OC1(C)C ZZPNDIHOQDQVNU-UHFFFAOYSA-N 0.000 description 2
- ASMQGLCHMVWBQR-UHFFFAOYSA-N Diphenyl phosphate Chemical group C=1C=CC=CC=1OP(=O)(O)OC1=CC=CC=C1 ASMQGLCHMVWBQR-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- JPJGNZQDELRZGE-UHFFFAOYSA-N (phenyl-$l^{2}-phosphanyl)benzene Chemical group C=1C=CC=CC=1[P]C1=CC=CC=C1 JPJGNZQDELRZGE-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- -1 phosphonium cations Chemical class 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F292/00—Macromolecular compounds obtained by polymerising monomers on to inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/34—Introducing sulfur atoms or sulfur-containing groups
- C08F8/36—Sulfonation; Sulfation
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/67—Biocides
- C04B2103/69—Fungicides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
本发明公开了一种混凝土复合增粘剂及其制备方法，涉及混凝土技术领域。本发明在制备混凝土复合增粘剂时，首先，将丙烯酸、甲基丙烯酸甲酯、丙烯酰胺、乙烯基二苯基磷聚合得到的聚丙烯酸树脂和改性卟啉反应，再磺化制得改性聚丙烯酸树脂；其次，将乙烯基三甲氧基硅烷预处理的硅灰和四乙烯基四甲基环四硅氧烷、乙烯基硼酸频哪醇酯反应制得改性硅灰，最后，将聚丙烯酸树脂、改性硅灰混合制得凝土复合增粘剂。本发明制备的混凝土复合增粘剂具有良好的工作性能和抗菌性。The invention discloses a concrete composite tackifier and a preparation method thereof, and relates to the technical field of concrete. When preparing the concrete composite tackifier, the invention firstly reacts a polyacrylic acid resin obtained by polymerizing acrylic acid, methyl methacrylate, acrylamide, and vinyl diphenyl phosphine with modified porphyrin, and then sulfonates to obtain a modified polyacrylic acid resin; secondly, silica fume pretreated with vinyl trimethoxysilane reacts with tetravinyl tetramethyl cyclotetrasiloxane and vinyl boric acid pinacol ester to obtain modified silica fume; finally, the polyacrylic acid resin and the modified silica fume are mixed to obtain the concrete composite tackifier. The concrete composite tackifier prepared by the invention has good working performance and antibacterial properties.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to a concrete composite tackifier and a preparation method thereof.
Background
The concrete tackifier is used as a special chemical additive to optimize and improve the overall performance of concrete. The compound is a special compound, and can obviously improve the fluidity, ductility and cohesive force of concrete, so that the concrete is easier to operate and control in the construction process.
Concrete tackifiers are generally composed of high molecular weight polymers, inorganic sols or other special compounds that are capable of complex interactions with cement particles, aggregates, water, etc. in concrete. When the tackifier is added into concrete, the polymer chain segments can quickly penetrate into the concrete, and form a tight adsorption and wrapping relationship with cement particles. The adsorption not only increases the binding force among cement particles, but also ensures that the whole concrete structure is more compact and stable.
However, the concrete adhesion promoters on the current market have some defects, especially the compatibility of most of the concrete adhesion promoters sold on the market with polycarboxylic acid water reducers is poor, in addition, the adhesion promoters often lack antibacterial functions, and the growth and diffusion of microorganisms such as bacteria and fungi on the surface or in the concrete are difficult to effectively prevent, so that the growth and diffusion of the microorganisms not only can shorten the service life of the concrete, but also can threaten the sanitary safety of buildings, and influence the living comfort of people. Therefore, there is an urgent need to develop a novel concrete tackifier which not only has excellent tackifying performance, but also has good compatibility with a polycarboxylic acid water reducer, and can effectively inhibit or kill microorganisms so as to ensure the service life of concrete and the sanitary safety of a building, and create a healthier and more comfortable living environment for people.
Disclosure of Invention
The invention aims to provide a concrete composite tackifier and a preparation method thereof, which are used for solving the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
The concrete composite tackifier is prepared by mixing modified polyacrylic resin and modified silica fume.
The modified polyacrylic resin is prepared by the reaction of polyacrylic resin obtained by polymerization of acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphorus and modified porphyrin and sulfonation.
Preferably, the modified silica fume is obtained by reacting silica fume pretreated by vinyl trimethoxy silane with tetra-vinyl tetramethyl cyclotetrasiloxane and vinyl boric acid pinacol ester.
The preparation method of the concrete composite tackifier comprises the following preparation steps:
(1) Mixing acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphate according to a mass ratio of 15:15:20:5 to obtain a monomer mixture, weighing the monomer mixture, azodiisobutyronitrile and isopropanol according to a mass ratio of 50:1:49, mixing 20-30% of the monomer mixture, 20-30% of azodiisobutyronitrile and 60-70% of isopropanol to obtain a solution A, mixing the rest of the monomer mixture, azodiisobutyronitrile and isopropanol to obtain a solution B, heating the solution A to 85 ℃, refluxing and stirring for 30-40min, dropwise adding the solution B until the dropwise adding speed is 1mL/min, continuing stirring for 4-5h at 85 ℃ after the dropwise adding is finished, cooling to 50-60 ℃, adding triethylamine to adjust the pH to 6-7, continuing to react for 0.5h, and performing reduced pressure rotary evaporation and vacuum drying to obtain polyacrylic resin;
(2) Sequentially adding p-chlorobenzaldehyde, benzaldehyde, iodine and pyrrole into dichloromethane with the mass of 20 times of that of the p-chlorobenzaldehyde according to the molar ratio of 1:3:4:0.4:3, adding the p-chlorobenzoquinone after primary activation, performing secondary activation to obtain a mixture, evaporating the mixture on Flori silica, and purifying by a flash chromatography to obtain modified porphyrin;
(3) Mixing polyacrylic resin, modified porphyrin and isopropanol according to the mass ratio of 1 (0.2-0.3) (20-30), heating to 100 ℃ for reflux reaction for 10-12h, performing reduced pressure rotary evaporation and vacuum drying to obtain the functionalized polyacrylic resin, preparing 0.2g/mL solution from the functionalized polyacrylic resin and N, N-dimethylformamide, dropwise adding 99wt% concentrated hydrochloric acid with the mass of 12 times of the functionalized polyacrylic resin into the solution, dropwise adding the concentrated hydrochloric acid with the dropwise adding speed of 1mL/min, heating to 40 ℃ for reaction for 2h, performing reduced pressure rotary evaporation after the reaction is finished, and performing vacuum drying to obtain the modified polyacrylic resin;
(4) Mixing pretreated silica fume, tetra-vinyl tetramethyl-cyclotetrasiloxane, vinyl pinacol borate, azodiisobutyronitrile and N, N-dimethylformamide according to the mass ratio of 1 (0.3-0.4) (0.1-0.2) (50-60), uniformly mixing by ultrasonic, heating to 70-80 ℃ for reacting for 2-3h, filtering and washing with pure water for 3-4 times after the reaction is finished to obtain modified silica fume;
(5) Uniformly mixing the modified polyacrylic resin and the modified silica fume according to the mass ratio of 1 (0.05-0.1) to obtain the concrete composite tackifier.
Preferably, the eluent of the flash chromatography in the step (2) is ethyl acetate/chloroform, and the elution gradient of the eluent is ethyl acetate and chloroform in a volume ratio of 8:2 to 1:9.
The method is characterized in that the primary activation in the step (2) is performed by a microwave instrument, the power of the microwave instrument is 100W, the temperature is 30 ℃ and the time is 30min, the secondary activation is performed by the microwave instrument, the power of the microwave instrument is 100W, the temperature is 30 ℃ and the time is 1min.
The preparation method of the pretreated silica fume in the step (4) comprises the steps of mixing vinyl trimethoxy silane, absolute ethyl alcohol and pure water for 10min according to the mass ratio of 1:1:5, adding silica fume with the mass of 0.5 times that of the vinyl trimethoxy silane, heating to 110 ℃, carrying out reflux reaction for 3-4h, filtering, washing for 4 times by using the absolute ethyl alcohol, and carrying out vacuum drying to obtain the pretreated silica fume.
Preferably, the specific surface area of the silica fume is 25m 2/g.
Compared with the prior art, the invention has the following beneficial effects:
When the concrete composite tackifier is prepared, firstly, polyacrylic resin obtained by polymerizing acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphate reacts with modified porphyrin, then, the modified polyacrylic resin is prepared by sulfonation, secondly, the modified silica fume is prepared by reacting silica fume pretreated by vinyl trimethoxy silane, tetra-vinyl tetramethyl-cyclotetrasiloxane and vinyl pinacol borate, and finally, the polyacrylic resin and the modified silica fume are mixed to prepare the concrete composite tackifier.
Firstly, acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphate are polymerized to form polyacrylic resin with a high molecular chain, a diphenyl phosphate structure is grafted on a side chain, then the polyacrylic resin reacts with chlorophenyl on modified porphyrin to generate quaternary phosphonium salt, the quaternary phosphonium salt has good antibacterial property, and then concentrated hydrochloric acid is used for sulfonation, hydrophilic sulfonic acid groups are grafted on the polyacrylic resin, so that the water retention property can be improved, the polyacrylic acid molecular chain not only contains negatively charged carboxyl groups and negatively charged sulfonic acid groups, but also contains positively charged quaternary phosphonium cations, and the existence of the charges enables the high molecular chains to interact through electrostatic attractive force, so that the crosslinking is realized, and the viscosity of the polyacrylic resin is further enhanced. The existence of the porphyrin structure can well complex calcium ions in cement, so that the viscosity is enhanced;
Secondly, the vinyl trimethoxy silane pretreated silica fume contains double bonds, and under the action of an initiator, tetra-vinyl tetramethyl cyclotetrasiloxane and vinyl boric acid pinacol ester can be polymerized on the surface of the silica fume, so that cyclosiloxane and boric acid pinacol ester structures are grafted on the surface of the silica fume. The silica fume is used as an expansive inorganic material with high specific surface area, so that the water retention of concrete can be increased, the alkalinity in the environment is gradually increased in the cement hydration process, under the alkaline condition, the cyclosiloxane structure and the pinacol borate structure grafted on the surface of the silica fume are gradually hydrolyzed, the cyclosiloxane is hydrolyzed and opened to generate a silicon hydroxyl structure, the pinacol borate is hydrolyzed to generate a boric acid structure, the silicon hydroxyl structure and the boric acid structure have good adsorption effect on the cement, can permeate into the concrete, form a tight adsorption and wrapping relationship with cement particles, not only is the cohesive force between the cement particles increased, but also the whole concrete structure is more compact and stable.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The specific surface area of the silica fume used in the following examples and comparative examples was 25m 2/g.
Example 1:
the preparation method of the concrete composite tackifier comprises the following preparation steps:
(1) Mixing acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphate according to a mass ratio of 15:15:20:5 to obtain a monomer mixture, weighing the monomer mixture, azodiisobutyronitrile and isopropanol according to a mass ratio of 50:1:49, mixing 20% of the monomer mixture, 20% of azodiisobutyronitrile and 60% of isopropanol to obtain a solution A, mixing the rest of the monomer mixture, azodiisobutyronitrile and isopropanol to obtain a solution B, heating the solution A to 85 ℃, refluxing and stirring for 40min, dropwise adding the solution B with a dropwise acceleration of 1mL/min, continuously stirring for 5h at 85 ℃, cooling to 60 ℃, adding triethylamine to adjust pH to 7, continuously reacting for 0.5h, and performing reduced pressure rotary steaming and vacuum drying to obtain the polyacrylic resin;
(2) The preparation method comprises the steps of weighing p-chlorobenzaldehyde, benzaldehyde, pyrrole, iodine and p-chlorobenzoquinone according to a molar ratio of 1:3:4:0.4:3, sequentially adding the p-chlorobenzaldehyde, the benzaldehyde, the iodine and the pyrrole into dichloromethane with the mass of 20 times that of the p-chlorobenzaldehyde, performing primary activation, wherein the primary activation is performed by a microwave instrument with the power of 100W, the temperature of 30 ℃ and the time of 30min, adding the p-chlorobenzoquinone and performing secondary activation, wherein the secondary activation is performed by the microwave instrument, the power of 100W and the time of 1min, obtaining a mixture, evaporating the mixture on Floridosil, purifying by a flash chromatography to obtain modified porphyrin, wherein an eluent of the flash chromatography is ethyl acetate/chloroform, and the elution gradient of the eluent is ethyl acetate and chloroform with the volume ratio of 8:2 to 1:9;
(3) Mixing polyacrylic resin, modified porphyrin and isopropanol according to a mass ratio of 1:0.2:20, heating to 100 ℃ for reflux reaction for 12 hours, performing reduced pressure rotary evaporation and vacuum drying to obtain the functional polyacrylic resin, preparing 0.2g/mL solution from the functional polyacrylic resin and N, N-dimethylformamide, dropwise adding 99wt% concentrated hydrochloric acid with a mass of 12 times that of the functional polyacrylic resin into the solution, wherein the dropwise adding speed is 1mL/min, heating to 40 ℃ for reaction for 2 hours, performing reduced pressure rotary evaporation after the reaction is finished, and performing vacuum drying to obtain the modified polyacrylic resin;
(4) Mixing vinyl trimethoxy silane, absolute ethyl alcohol and pure water for 10min according to the mass ratio of 1:1:5, adding silica fume with the mass of 0.5 times of that of the vinyl trimethoxy silane, heating to 110 ℃, carrying out reflux reaction for 3h, filtering, washing with the absolute ethyl alcohol for 4 times, and carrying out vacuum drying to obtain pretreated silica fume;
(5) And uniformly mixing the modified polyacrylic resin and the modified silica fume according to the mass ratio of 1:0.05 to obtain the concrete composite tackifier.
Example 2:
the preparation method of the concrete composite tackifier comprises the following preparation steps:
(1) Mixing acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphate according to a mass ratio of 15:15:20:5 to obtain a monomer mixture, weighing the monomer mixture, azodiisobutyronitrile and isopropanol according to a mass ratio of 50:1:49, mixing 25% of the monomer mixture, 25% of azodiisobutyronitrile and 65% of isopropanol to obtain a solution A, mixing the rest of the monomer mixture, azodiisobutyronitrile and isopropanol to obtain a solution B, heating the solution A to 85 ℃, refluxing and stirring for 35min, dropwise adding the solution B with a dropwise acceleration of 1mL/min, continuously stirring at 85 ℃ for 4.5h after the dropwise adding, cooling to 55 ℃, adding triethylamine to adjust the pH to 6.5, continuously reacting for 0.5h, and performing reduced pressure rotary evaporation and vacuum drying to obtain the polyacrylic resin;
(2) The preparation method comprises the steps of weighing p-chlorobenzaldehyde, benzaldehyde, pyrrole, iodine and p-chlorobenzoquinone according to a molar ratio of 1:3:4:0.4:3, sequentially adding the p-chlorobenzaldehyde, the benzaldehyde, the iodine and the pyrrole into dichloromethane with the mass of 20 times that of the p-chlorobenzaldehyde, performing primary activation, wherein the primary activation is performed by a microwave instrument with the power of 100W, the temperature of 30 ℃ and the time of 30min, adding the p-chlorobenzoquinone and performing secondary activation, wherein the secondary activation is performed by the microwave instrument, the power of 100W and the time of 1min, obtaining a mixture, evaporating the mixture on Floridosil, purifying by a flash chromatography to obtain modified porphyrin, wherein an eluent of the flash chromatography is ethyl acetate/chloroform, and the elution gradient of the eluent is ethyl acetate and chloroform with the volume ratio of 8:2 to 1:9;
(3) Mixing polyacrylic resin, modified porphyrin and isopropanol according to a mass ratio of 1:0.25:25, heating to 100 ℃ for reflux reaction for 11 hours, performing reduced pressure rotary evaporation and vacuum drying to obtain the functional polyacrylic resin, preparing 0.2g/mL solution from the functional polyacrylic resin and N, N-dimethylformamide, dropwise adding 99wt% concentrated hydrochloric acid with a mass of 12 times that of the functional polyacrylic resin into the solution, wherein the dropwise adding speed is 1mL/min, heating to 40 ℃ for reaction for 2 hours, performing reduced pressure rotary evaporation after the reaction is finished, and performing vacuum drying to obtain the modified polyacrylic resin;
(4) Mixing vinyl trimethoxy silane, absolute ethyl alcohol and pure water for 10min according to the mass ratio of 1:1:5, adding silica fume with the mass of 0.5 times of that of the vinyl trimethoxy silane, heating to 110 ℃, carrying out reflux reaction for 3.5h, filtering, washing with the absolute ethyl alcohol for 4 times, and carrying out vacuum drying to obtain pretreated silica fume;
(5) And uniformly mixing the modified polyacrylic resin and the modified silica fume according to the mass ratio of 1:0.07 to obtain the concrete composite tackifier.
Example 3:
the preparation method of the concrete composite tackifier comprises the following preparation steps:
(1) Mixing acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphate according to a mass ratio of 15:15:20:5 to obtain a monomer mixture, weighing the monomer mixture, azodiisobutyronitrile and isopropanol according to a mass ratio of 50:1:49, mixing 30% of the monomer mixture, 30% of azodiisobutyronitrile and 70% of isopropanol to obtain a solution A, mixing the rest of the monomer mixture, azodiisobutyronitrile and isopropanol to obtain a solution B, heating the solution A to 85 ℃, refluxing and stirring for 30min, dropwise adding the solution B with a dropwise acceleration of 1mL/min, continuously stirring for 4h at 85 ℃, cooling to 50 ℃, adding triethylamine to adjust pH to 6, continuously reacting for 0.5h, and performing reduced pressure rotary steaming and vacuum drying to obtain polyacrylic resin;
(2) The preparation method comprises the steps of weighing p-chlorobenzaldehyde, benzaldehyde, pyrrole, iodine and p-chlorobenzoquinone according to a molar ratio of 1:3:4:0.4:3, sequentially adding the p-chlorobenzaldehyde, the benzaldehyde, the iodine and the pyrrole into dichloromethane with the mass of 20 times that of the p-chlorobenzaldehyde, performing primary activation, wherein the primary activation is performed by a microwave instrument with the power of 100W, the temperature of 30 ℃ and the time of 30min, adding the p-chlorobenzoquinone and performing secondary activation, wherein the secondary activation is performed by the microwave instrument, the power of 100W and the time of 1min, obtaining a mixture, evaporating the mixture on Floridosil, purifying by a flash chromatography to obtain modified porphyrin, wherein an eluent of the flash chromatography is ethyl acetate/chloroform, and the elution gradient of the eluent is ethyl acetate and chloroform with the volume ratio of 8:2 to 1:9;
(3) Mixing polyacrylic resin, modified porphyrin and isopropanol according to a mass ratio of 1:0.3:30, heating to 100 ℃ for reflux reaction for 10 hours, performing reduced pressure rotary evaporation and vacuum drying to obtain the functional polyacrylic resin, preparing 0.2g/mL solution from the functional polyacrylic resin and N, N-dimethylformamide, dropwise adding 99wt% concentrated hydrochloric acid with a mass of 12 times that of the functional polyacrylic resin into the solution, wherein the dropwise adding speed is 1mL/min, heating to 40 ℃ for reaction for 2 hours, performing reduced pressure rotary evaporation after the reaction is finished, and performing vacuum drying to obtain the modified polyacrylic resin;
(4) Mixing vinyl trimethoxy silane, absolute ethyl alcohol and pure water for 10min according to the mass ratio of 1:1:5, adding silica fume with the mass of 0.5 times of that of the vinyl trimethoxy silane, heating to 110 ℃, carrying out reflux reaction for 3h, filtering, washing with the absolute ethyl alcohol for 4 times, and carrying out vacuum drying to obtain pretreated silica fume;
(5) And uniformly mixing the modified polyacrylic resin and the modified silica fume according to the mass ratio of 1:0.1 to obtain the concrete composite tackifier.
Comparative example 1:
The preparation method of the concrete composite tackifier of the comparative example 1 is different from that of the example 2 in that the steps (2) - (3) are not included, the step (1) is modified in that acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphate are mixed according to the mass ratio of 15:15:20:5 to obtain a monomer mixture, the monomer mixture, azobisisobutyronitrile and isopropanol are weighed according to the mass ratio of 50:1:49, 25% of the monomer mixture, 25% of azobisisobutyronitrile and 65% of isopropanol are mixed to obtain a solution A, the rest of the monomer mixture, azobisisobutyronitrile and isopropanol are mixed to obtain a solution B, the solution A is heated to 85 ℃ and is stirred under reflux, the solution B is added dropwise, the dropwise adding speed is 1mL/min, the solution B is stirred for 4.5 hours at 85 ℃, the temperature is reduced to 55 ℃, the pH is adjusted to 6.5 by adding triethylamine, the solution is reacted for 0.5 hours continuously, and the solution A is obtained through reduced pressure rotary evaporation and vacuum drying, and the modified polyacrylic resin is obtained.
Comparative example 2:
the preparation method of the concrete composite tackifier of the comparative example 2 is different from that of the example 2 in that the step (4) is not included, and the step (5) is modified in that modified polyacrylic resin and silica fume are uniformly mixed according to the mass ratio of 1:0.07, so that the concrete composite tackifier is obtained.
Test example 1:
the concrete composite adhesion promoters of examples 1-3 and comparative examples 1-2 were applied to concrete, the proportions of the concrete are shown in Table 1, and performance tests of the concrete were performed. The results are shown in Table 2.
TABLE 1 concrete mixing proportion table (kg/m 3)
Wherein the cement is P.O 42.5.5 grade cement, the fly ash is F class I fly ash, the mineral powder is S95 grade mineral powder, the machine-made sand is limestone II zone machine-made sand, the grain size of fine stone is 5-10mm, the grain size of coarse stone is 10-20mm, and the water reducing agent is Ujion-PC polycarboxylate water reducing agent produced by Wu Hanyuan brocade building materials Co.
The concrete performance was tested with reference to GB/T8076-2008 concrete admixture and GB/T50080-2002 ordinary concrete mix Performance test method Standard, blank set being concrete without tackifier, and the test results being shown in Table 2.
TABLE 2
As can be seen from the comparison of the experimental data of examples 1-3 and comparative examples 1-2 in Table 2, the concrete composite tackifier prepared by the invention has good working performance.
By contrast, the viscosity increaser of examples 1-3 has slump greater than that of comparative examples 1-2 and has a lower expansion than that of comparative examples 1-2, which shows that firstly, acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphate are polymerized to form polyacrylic resin with a high molecular chain, diphenyl phosphate structure is grafted on a side chain, and then the polyacrylic resin is reacted with chlorophenyl on modified porphyrin to generate quaternary phosphonium salt, the quaternary phosphonium salt has good antibacterial property, and then the quaternary phosphonium salt is sulfonated by concentrated hydrochloric acid, and hydrophilic sulfonic acid groups are grafted on the polyacrylic resin, so that the water retention property can be improved;
Secondly, the vinyl trimethoxy silane pretreated silica fume contains double bonds, and under the action of an initiator, tetra-vinyl tetramethyl cyclotetrasiloxane and vinyl boric acid pinacol ester can be polymerized on the surface of the silica fume, so that cyclosiloxane and boric acid pinacol ester structures are grafted on the surface of the silica fume. The silica fume is used as an expansive inorganic material with high specific surface area, so that the water retention of concrete can be increased, the alkalinity in the environment is gradually increased in the cement hydration process, under the alkaline condition, the cyclosiloxane structure and the pinacol borate structure grafted on the surface of the silica fume are gradually hydrolyzed, the cyclosiloxane is hydrolyzed and opened to generate a silicon hydroxyl structure, the pinacol borate is hydrolyzed to generate a boric acid structure, the silicon hydroxyl structure and the boric acid structure have good adsorption effect on the cement, can permeate into the concrete, form a tight adsorption and wrapping relationship with cement particles, not only is the cohesive force between the cement particles increased, but also the whole concrete structure is more compact and stable.
Test example 2:
Test of antibacterial properties:
Test method referring to standard GB/T21510-2008, the concrete composite tackifier prepared by the examples and comparative examples is tested for antibacterial property by an oscillation method. The results are shown in Table 3.
TABLE 3 Table 3
As can be seen from the comparison of the experimental data of examples 1-3 and comparative examples 1-2 in Table 3, the concrete composite tackifier prepared by the invention has good antibacterial performance.
By contrast, examples 1-3 have an antibacterial ratio greater than that of comparative example 2, indicating that acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphorus are polymerized to form a polyacrylic resin with a high molecular chain, a diphenyl phosphorus structure is grafted on a side chain, and then the polyacrylic resin is reacted with a chlorophenyl group on modified porphyrin to form a quaternary phosphonium salt, which has good antibacterial performance.
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 characteristics 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 (6)
1. The concrete composite tackifier is characterized by being prepared by mixing modified polyacrylic resin and modified silica fume;
The modified polyacrylic resin is prepared by the reaction of polyacrylic resin obtained by polymerization of acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphorus and modified porphyrin and then sulfonation;
The modified silica fume is obtained by reacting silica fume pretreated by vinyl trimethoxy silane with tetra-vinyl tetramethyl cyclotetrasiloxane and vinyl boric acid pinacol ester.
2. The preparation method of the concrete composite tackifier is characterized by comprising the following preparation steps:
(1) Mixing acrylic acid, methyl methacrylate, acrylamide and vinyl diphenyl phosphate according to a mass ratio of 15:15:20:5 to obtain a monomer mixture, weighing the monomer mixture, azodiisobutyronitrile and isopropanol according to a mass ratio of 50:1:49, mixing 20-30% of the monomer mixture, 20-30% of azodiisobutyronitrile and 60-70% of isopropanol to obtain a solution A, mixing the rest of the monomer mixture, azodiisobutyronitrile and isopropanol to obtain a solution B, heating the solution A to 85 ℃, refluxing and stirring for 30-40min, dropwise adding the solution B until the dropwise adding speed is 1mL/min, continuing stirring for 4-5h at 85 ℃ after the dropwise adding is finished, cooling to 50-60 ℃, adding triethylamine to adjust the pH to 6-7, continuing to react for 0.5h, and performing reduced pressure rotary evaporation and vacuum drying to obtain polyacrylic resin;
(2) Sequentially adding p-chlorobenzaldehyde, benzaldehyde, iodine and pyrrole into dichloromethane with the mass of 20 times of that of the p-chlorobenzaldehyde according to the molar ratio of 1:3:4:0.4:3, adding the p-chlorobenzoquinone after primary activation, performing secondary activation to obtain a mixture, evaporating the mixture on Flori silica, and purifying by a flash chromatography to obtain modified porphyrin;
(3) Mixing polyacrylic resin, modified porphyrin and isopropanol according to the mass ratio of 1 (0.2-0.3) (20-30), heating to 100 ℃ for reflux reaction for 10-12h, performing reduced pressure rotary evaporation and vacuum drying to obtain the functionalized polyacrylic resin, preparing 0.2g/mL solution from the functionalized polyacrylic resin and N, N-dimethylformamide, dropwise adding 99wt% concentrated hydrochloric acid with the mass of 12 times of the functionalized polyacrylic resin into the solution, dropwise adding the concentrated hydrochloric acid with the dropwise adding speed of 1mL/min, heating to 40 ℃ for reaction for 2h, performing reduced pressure rotary evaporation after the reaction is finished, and performing vacuum drying to obtain the modified polyacrylic resin;
(4) Mixing pretreated silica fume, tetra-vinyl tetramethyl-cyclotetrasiloxane, vinyl pinacol borate, azodiisobutyronitrile and N, N-dimethylformamide according to the mass ratio of 1 (0.3-0.4) (0.1-0.2) (50-60), uniformly mixing by ultrasonic, heating to 70-80 ℃ for reacting for 2-3h, filtering and washing with pure water for 3-4 times after the reaction is finished to obtain modified silica fume;
(5) Uniformly mixing the modified polyacrylic resin and the modified silica fume according to the mass ratio of 1 (0.05-0.1) to obtain the concrete composite tackifier.
3. The method for preparing a concrete composite tackifier according to claim 2, wherein the eluent of the flash chromatography in the step (2) is ethyl acetate/chloroform, and the elution gradient of the eluent is ethyl acetate and the volume ratio of chloroform is from 8:2 to 1:9.
4. The preparation method of the concrete composite tackifier according to claim 2, wherein the primary activation in the step (2) is microwave activation, the power of the microwave is 100W, the temperature is 30 ℃ and the time is 30min, and the secondary activation is microwave activation, the power of the microwave is 100W, the temperature is 30 ℃ and the time is 1min.
5. The preparation method of the concrete composite tackifier according to claim 2, wherein the preparation method of the pretreated silica fume in the step (4) is characterized in that vinyltrimethoxysilane, absolute ethyl alcohol and pure water are mixed for 10min according to the mass ratio of 1:1:5, silica fume with the mass of 0.5 times that of vinyltrimethoxysilane is added, the temperature is raised to 110 ℃, the reflux reaction is carried out for 3-4h, filtration and washing with absolute ethyl alcohol are carried out for 4 times, and the pretreated silica fume is obtained after vacuum drying.
6. The method for preparing a concrete composite tackifier according to claim 5, wherein the specific surface area of the silica fume is 25m 2/g.
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| WO2013167537A1 (en) * | 2012-05-10 | 2013-11-14 | Wacker Chemie Ag | Use of copolymers as tackifiers for adhesives |
| US20140303312A1 (en) * | 2013-03-15 | 2014-10-09 | The Sherwin-Williams Company | Flourinated silane-modified polyacrylic resin |
| CN111747673A (en) * | 2020-05-29 | 2020-10-09 | 江苏百瑞吉新材料有限公司 | Modified concrete additive special for high-speed rail and preparation method thereof |
| CN113637123A (en) * | 2021-08-20 | 2021-11-12 | 武汉源锦建材科技有限公司 | Hyperbranched concrete tackifier and preparation method and application thereof |
| CN117865550A (en) * | 2024-01-19 | 2024-04-12 | 甘肃金凯宁工贸集团有限公司 | Environmentally friendly adhesive reducing agent for concrete and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013167537A1 (en) * | 2012-05-10 | 2013-11-14 | Wacker Chemie Ag | Use of copolymers as tackifiers for adhesives |
| US20140303312A1 (en) * | 2013-03-15 | 2014-10-09 | The Sherwin-Williams Company | Flourinated silane-modified polyacrylic resin |
| CN111747673A (en) * | 2020-05-29 | 2020-10-09 | 江苏百瑞吉新材料有限公司 | Modified concrete additive special for high-speed rail and preparation method thereof |
| CN113637123A (en) * | 2021-08-20 | 2021-11-12 | 武汉源锦建材科技有限公司 | Hyperbranched concrete tackifier and preparation method and application thereof |
| CN117865550A (en) * | 2024-01-19 | 2024-04-12 | 甘肃金凯宁工贸集团有限公司 | Environmentally friendly adhesive reducing agent for concrete and preparation method thereof |
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