CN115304720A - Slump-retaining concrete glue reducing agent and preparation method thereof - Google Patents
Slump-retaining concrete glue reducing agent and preparation method thereof Download PDFInfo
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- CN115304720A CN115304720A CN202211025209.4A CN202211025209A CN115304720A CN 115304720 A CN115304720 A CN 115304720A CN 202211025209 A CN202211025209 A CN 202211025209A CN 115304720 A CN115304720 A CN 115304720A
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- slump
- concrete
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- acid
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- 239000004567 concrete Substances 0.000 title claims abstract description 90
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003292 glue Substances 0.000 title abstract description 13
- 239000003999 initiator Substances 0.000 claims abstract description 40
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims abstract description 36
- 150000007524 organic acids Chemical class 0.000 claims abstract description 30
- JHUFGBSGINLPOW-UHFFFAOYSA-N 3-chloro-4-(trifluoromethoxy)benzoyl cyanide Chemical compound FC(F)(F)OC1=CC=C(C(=O)C#N)C=C1Cl JHUFGBSGINLPOW-UHFFFAOYSA-N 0.000 claims abstract description 18
- BOUMJMOUEAZGGH-UHFFFAOYSA-N P(=O)(O)(O)O.C(C=C)(=O)NCCO Chemical compound P(=O)(O)(O)O.C(C=C)(=O)NCCO BOUMJMOUEAZGGH-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000012986 chain transfer agent Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 50
- 239000007788 liquid Substances 0.000 claims description 49
- -1 4-hydroxybutyl vinyl Chemical group 0.000 claims description 38
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 34
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 34
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims description 32
- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 30
- 239000004568 cement Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 20
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 17
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 16
- 239000001530 fumaric acid Substances 0.000 claims description 16
- 230000001590 oxidative effect Effects 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 16
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 15
- 230000003647 oxidation Effects 0.000 claims description 14
- 238000007254 oxidation reaction Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 claims description 8
- 229930003268 Vitamin C Natural products 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 claims description 8
- 235000019154 vitamin C Nutrition 0.000 claims description 8
- 239000011718 vitamin C Substances 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 7
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 4
- QVDTXNVYSHVCGW-ONEGZZNKSA-N isopentenol Chemical compound CC(C)\C=C\O QVDTXNVYSHVCGW-ONEGZZNKSA-N 0.000 claims description 4
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 4
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- 239000001632 sodium acetate Substances 0.000 claims description 3
- 235000017281 sodium acetate Nutrition 0.000 claims description 3
- AEUVIXACNOXTBX-UHFFFAOYSA-N 1-sulfanylpropan-1-ol Chemical compound CCC(O)S AEUVIXACNOXTBX-UHFFFAOYSA-N 0.000 claims description 2
- VJFCXDHFYISGTE-UHFFFAOYSA-N O=[Co](=O)=O Chemical compound O=[Co](=O)=O VJFCXDHFYISGTE-UHFFFAOYSA-N 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 2
- YTIVTFGABIZHHX-UHFFFAOYSA-N butynedioic acid Chemical compound OC(=O)C#CC(O)=O YTIVTFGABIZHHX-UHFFFAOYSA-N 0.000 claims description 2
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 2
- 239000011790 ferrous sulphate Substances 0.000 claims description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 2
- 125000005394 methallyl group Chemical group 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- 235000007686 potassium Nutrition 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 229910000105 potassium hydride Inorganic materials 0.000 claims description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 2
- 239000012966 redox initiator Substances 0.000 claims description 2
- 239000012279 sodium borohydride Substances 0.000 claims description 2
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- 229920000151 polyglycol Polymers 0.000 claims 1
- 239000010695 polyglycol Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 14
- 230000000740 bleeding effect Effects 0.000 abstract description 7
- 239000000654 additive Substances 0.000 abstract description 4
- 238000006116 polymerization reaction Methods 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000009396 hybridization Methods 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 239000002270 dispersing agent Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- ZOJUHKNEEBOPTO-UHFFFAOYSA-N 4-cyano-5-dodecylsulfanyl-4-methyl-2-sulfanyl-5-sulfanylidenepentanoic acid Chemical group CCCCCCCCCCCCSC(=S)C(C)(C#N)CC(S)C(O)=O ZOJUHKNEEBOPTO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000013459 approach Methods 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
- 239000003063 flame retardant Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 150000003077 polyols Chemical class 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000012744 reinforcing agent Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- ZHUXMBYIONRQQX-UHFFFAOYSA-N hydroxidodioxidocarbon(.) Chemical group [O]C(O)=O ZHUXMBYIONRQQX-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229920005552 sodium lignosulfonate Polymers 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- 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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/165—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds containing polyether side chains
-
- 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
- C08F4/00—Polymerisation catalysts
- C08F4/40—Redox systems
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of concrete admixtures, and particularly relates to a slump-retaining concrete glue reducing agent and a preparation method thereof. According to the invention, unsaturated organic acid and unsaturated six-carbon macromonomer are used as main raw materials, and methyl acrylate, sodium allylsulfonate, hydroxyethyl acrylamide phosphate, alkanolamine, an initiator and a chain transfer agent are matched to carry out polymerization reaction, so that the gel reducing agent with the characteristics of high molecular structure hybridization degree, large molecular structure, large space occupancy and the like is prepared. The concrete gel reducing agent has good compatibility with other concrete additives, and after being mixed with concrete, the concrete gel reducing agent not only can reduce the using amount of cementing materials, but also can improve the workability of the concrete, reduce bleeding and reduce the slump loss of the concrete.
Description
Technical Field
The invention belongs to the technical field of concrete admixtures, and particularly relates to a slump loss resistant concrete glue reducing agent and a preparation method thereof.
Background
Concrete is the largest building material in building engineering, and the demand of commercial concrete is increased due to the rapid urbanization process in recent years. Meanwhile, the construction industry has a great influence on the environmental pollution problem and the energy demand problem. The cement production in the cement concrete industry consumes a large amount of energy resources, and the main approach of green high-performance concrete is to use a large amount of mineral admixture, so that the cement consumption is saved as much as possible. The concrete water reducing agent is a common method for actively reducing the using amount of the cementing materials, and is fully proved in construction engineering of recent decades, namely under the condition of the same water-cement ratio, the using amount of the cementing materials is reduced properly, and better working performance of the concrete can be obtained. However, the dispersion mechanism of the water reducing agent has great limitation, and if the dosage of the cementing material is further reduced by increasing the addition amount of the water reducing agent, the problems of bleeding, segregation and the like often occur, and even engineering accidents are caused.
The concrete glue reducing agent is used as a new-generation concrete additive, can better improve the performance of concrete, improve the utilization rate of cement materials in the concrete, reduce the using amount of the cementing materials in the concrete, further reduce the production of cement, accord with the environmental protection concept of green development and construction, and can better play the glue reducing performance of the concrete on the basis of doping the water reducing agent.
The patent application with the publication number of CN 114315208A discloses a concrete gel reducing agent and a preparation method and application thereof, wherein the raw materials of the concrete gel reducing agent comprise sodium polyacrylate, polymeric polyol, sodium tripolyphosphate and sodium acetate. The concrete glue reducing agent provided by the scheme can obviously improve the strength, the dispersity and the working performance of concrete, can still effectively improve the strength, the dispersity and the working performance of the concrete under the condition that the raw material of the concrete is greatly changed, and has good adaptability to different materials.
The publication number CN110818310A is a patent application, and discloses a concrete glue reducing agent, a preparation method and an application thereof, wherein the concrete glue reducing agent comprises: 2-5% of dispersant, 0-3% of stable dispersant, 3-5% of reinforcing agent, 8-12% of regulator and the balance of water. The dispersing agent is one or more of polyvinylpyrrolidone and sodium lignosulphonate, the stabilizing dispersing agent is cellulose sodium sulphonate, the reinforcing agent is a mixture of polymerized polyol, and the regulator is a mixture of sodium silicate and sodium hydroxide. The concrete glue reducing agent of the scheme can further disperse cement particles under the action of the water reducing agent, promote the cement particles to be fully hydrated, reduce the phenomena of bleeding, segregation and the like caused by over-doping of the water reducing agent, improve the working performance of concrete and reduce the slump loss of the concrete.
However, most of the prior art schemes mix substances with single functions by means of compounding, so that the components are complex, and the components have mutual influence, so that the compatibility of the prepared glue reducing agent and other concrete admixtures is poor, and the improvement of the working performance of the concrete is not facilitated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a slump-retaining concrete cement reducer. The gel reducing agent has good compatibility with other concrete additives, and after being mixed with concrete, the gel reducing agent not only can reduce the using amount of a cementing material, but also can improve the workability of the concrete, reduce bleeding and reduce the slump loss of the concrete.
The technical scheme of the invention is as follows:
the slump-retaining concrete gel reducer consists of the following raw materials: the composition comprises, by mass, 12 to 20% of an unsaturated organic acid, 30 to 45% of an unsaturated macromonomer, 1 to 4% of methyl acrylate, 3 to 8% of sodium allylsulfonate, 2 to 5% of hydroxyethyl acrylamide phosphate, 2 to 7% of an alkanolamine, 2 to 5% of an initiator, 1 to 3% of a chain transfer agent, and the balance of water.
Preferably, the unsaturated organic acid is one or more of acrylic acid, butynedioic acid, beta-cinnamic acid and fumaric acid.
Preferably, the unsaturated organic acid is a mixture of acrylic acid and fumaric acid, wherein the mass ratio of acrylic acid to fumaric acid is (1 to 3): (2 to 4).
Preferably, the unsaturated macromonomer is one or more of methallyl polyoxyethylene ether with the weight average molecular weight of 2000 to 3000, isopentenol polyoxyethylene ether with the weight average molecular weight of 2000 to 3000, ethylene glycol monovinyl polyethylene glycol ether with the weight average molecular weight of 2000 to 5000, and 4-hydroxybutyl vinyl polyoxyethylene ether with the weight average molecular weight of 3000 to 6000.
Preferably, the unsaturated macromonomer is a mixture of isopentenol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 and 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000, wherein the mass ratio of the isopentenol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 to the 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000 is 1 (2-4).
Preferably, the alkanolamine is one or more of triethanolamine, triisopropanolamine and diethanolisopropanolamine.
In the technical scheme, alkanolamines such as triethanolamine, triisopropanolamine and diethanolisopropanolamine have the characteristics of eliminating static electricity on the surface of particles and inhibiting particle agglomeration, so that the rheological property of the material can be changed, the hydration of a cementing material can be promoted, the hydration activity of the cementing material is fully exerted when the alkanolamine is used in the gel reducing agent, the strength of concrete is further improved, and the dosage of the cementing material can be effectively reduced when the target strength is the same.
Preferably, the initiator is a redox initiator, and comprises an oxidizing component and a reducing component; the oxidation component is one or more of hydrogen peroxide, potassium persulfate, ammonium persulfate and peroxyacetic acid; the reducing component is one or more of vitamin C, ferrous sulfate, oxalic acid and potassium/sodium borohydride.
Preferably, the initiator further comprises a transition metal oxide; the transition metal oxide is one or more of ferric oxide, manganese dioxide, cobalt trioxide or zinc oxide.
In the above technical scheme of the present invention, the inventor proposes the scheme because the inventor finds that the existing initiator system has the problems of low monomer conversion efficiency, poor compatibility with concrete, etc., and therefore, in order to make up for the deficiencies of the prior art, the inventor adds a transition metal oxide into the initiator system, and finds that not only the monomer conversion efficiency can be improved, but also the slump retaining performance of the prepared glue reducing agent is good. The inventor believes that the transition metal oxide as an inorganic catalyst has larger specific surface area and active adsorption sites, can effectively coordinate reactant molecules, reduce the activation energy of the reaction, promote the conversion of monomer free radicals into chain free radicals, accelerate the chain growth and lead to the increase of the molecular weight of the polymer; meanwhile, the transition metal oxide can form metal ions to coordinate with carboxyl oxygen atoms in unsaturated organic acid, so that the energy of the original conjugation effect is increased, the activity of double bonds is increased, the polymerization barrier is reduced, and the monomer conversion rate is improved.
Preferably, the chain transfer agent is one or more of thioglycolic acid, mercaptopropanol, sodium acetate and 4-cyano-4- (dodecylmercaptocarbonyl) sulfanylpentanoic acid.
Preferably, in the above embodiment, the chain transfer agent is 4-cyano-4- (dodecylthiothiocarbonyl) sulfanylpentanoic acid.
The invention also aims to provide a preparation method of the slump-retaining concrete gel reducer.
The preparation method of the slump-retaining concrete gel reducer comprises the following steps:
1) Dispersing unsaturated organic acid, hydroxyethyl acrylamide phosphate and methyl acrylate in water to obtain liquid a;
2) Dispersing a reducing component of an initiator and a transition metal oxide in water to obtain liquid b;
3) Adding unsaturated macromonomer, sodium allylsulfonate, an oxidation component of an initiator and a chain transfer agent into water, stirring and heating to 70-90 ℃ to obtain liquid c;
4) And dropwise adding the liquid a and the liquid b into the liquid c, keeping the constant temperature of 70-90 ℃, stirring at the rotating speed of 400-600rpm, controlling the dropwise adding time to be 2-5h, then adding alkanolamine and water to continuously react for 0.5-2h, cooling to room temperature after the reaction is finished, and adjusting the pH value of the solution to 6-8 to obtain the slump-retaining concrete gel reducer.
In conclusion, the invention has the following beneficial effects:
1. according to the invention, unsaturated organic acid and unsaturated six-carbon macromonomer are used as main raw materials, and methyl acrylate, sodium allylsulfonate, hydroxyethyl acrylamide phosphate, alkanolamine, an initiator and a chain transfer agent are matched to carry out polymerization reaction, so that the gel reducing agent with the characteristics of high molecular structure hybridization degree, large molecular structure, large space occupancy and the like is prepared. The concrete gel reducing agent has good compatibility with other concrete additives, and after being mixed with concrete, the concrete gel reducing agent not only can reduce the using amount of cementing materials, but also can improve the workability of the concrete, reduce bleeding and reduce the slump loss of the concrete.
2. The invention adopts an initiator system containing transition metal oxide, and the obtained glue reducing agent can be mixed with Ca on the surface of cement particles 2+ The chelate is formed by strong complexation, an adsorption layer is formed on the surface of cement particles, the cement particles are prevented from agglomerating, the early hydration rate of cement paste is accelerated, the pore space in the concrete is reduced, the pore structure is improved, the concrete can obtain a more compact microstructure, and the slump loss of the concrete is reduced.
Detailed Description
The technical solutions of the present invention are further described below with specific examples, but the specific details of the examples are only for illustrating the present invention and do not represent all technical approaches under the inventive concept. Therefore, the present invention should not be construed as being limited to the general technical solutions of the present invention.
Example 1
The slump-retaining concrete gel reducer consists of the following raw materials: the high-performance liquid-phase acrylic acid coating comprises, by weight, 30 parts of unsaturated organic acid, 80 parts of unsaturated macromonomer, 4 parts of methyl acrylate, 8 parts of sodium allylsulfonate, 6 parts of hydroxyethyl acrylamide phosphate, 6 parts of triisopropanolamine, 6 parts of an initiator, 4 parts of 4-cyano-4- (dodecyl thio thiocarbonyl) sulfanyl pentanoic acid and 56 parts of water.
The unsaturated organic acid is a mixture of acrylic acid and fumaric acid, wherein the mass ratio of the acrylic acid to the fumaric acid is 3:2.
the unsaturated macromolecular monomer is a mixture of isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 and 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000, wherein the mass ratio of the isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 to the 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000 is 1:3.
the initiator consists of an oxidizing component, a reducing component and a transition metal oxide, wherein the mass ratio of the oxidizing component to the reducing component to the transition metal oxide is 1:1:1.
the oxidation component is 30% hydrogen peroxide, the reduction component is vitamin C, and the transition metal oxide is ferric oxide.
The preparation method of the slump-retaining concrete gel reducer comprises the following steps:
1) Dispersing unsaturated organic acid, hydroxyethyl acrylamide phosphate and methyl acrylate in water to obtain liquid a;
2) Dispersing a reducing component of an initiator and a transition metal oxide in water to obtain liquid b;
3) Adding unsaturated macromonomer, sodium allylsulfonate, an oxidation component of an initiator and 4-cyano-4- (dodecyl thio carbonyl) sulfanyl pentanoic acid into water, stirring and heating to 75 ℃ to obtain liquid c;
4) And dropwise adding the liquid a and the liquid b into the liquid c, keeping the constant temperature of 75 ℃, stirring at the rotating speed of 500rpm, controlling the dropwise adding time to be 5h, then adding triisopropanolamine and water to continuously react for 1h, cooling to room temperature after the reaction is finished, and adjusting the pH value of the solution to 7 to obtain the slump-retaining concrete gel reducer.
Example 2
The slump-retaining concrete gel reducer consists of the following raw materials: the high-performance halogen-free flame retardant coating comprises, by weight, 40 parts of unsaturated organic acid, 60 parts of unsaturated macromonomer, 8 parts of methyl acrylate, 6 parts of sodium allylsulfonate, 10 parts of hydroxyethyl acrylamide phosphate, 10 parts of triisopropanolamine, 4 parts of an initiator, 2 parts of 4-cyano-4- (dodecyl thio thiocarbonyl) sulfanyl pentanoic acid and 60 parts of water.
The unsaturated organic acid is a mixture of acrylic acid and fumaric acid, wherein the mass ratio of the acrylic acid to the fumaric acid is 2:3.
the unsaturated macromolecular monomer is a mixture of isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 and 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000, wherein the mass ratio of the isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 to the 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000 is 1:3.
the initiator consists of an oxidizing component, a reducing component and a transition metal oxide, wherein the mass ratio of the oxidizing component to the reducing component to the transition metal oxide is 1:1:1.
the oxidation component is 30% hydrogen peroxide, the reduction component is vitamin C, and the transition metal oxide is ferric oxide.
The preparation method of the slump-retaining concrete gel reducer comprises the following steps:
1) Dispersing unsaturated organic acid, hydroxyethyl acrylamide phosphate and methyl acrylate in water to obtain liquid a;
2) Dispersing a reducing component of an initiator and a transition metal oxide in water to obtain liquid b;
3) Adding unsaturated macromonomer, sodium allylsulfonate, an oxidation component of an initiator and 4-cyano-4- (dodecyl thio carbonyl) sulfanyl pentanoic acid into water, stirring and heating to 80 ℃ to obtain liquid c;
4) And dropwise adding the liquid a and the liquid b into the liquid c, keeping the constant temperature of 80 ℃, stirring at the rotating speed of 500rpm, controlling the dropwise adding time to be 3h, then adding triisopropanolamine and water to continuously react for 1h, cooling to room temperature after the reaction is finished, and adjusting the pH value of the solution to 7 to obtain the slump-retaining concrete gel reducer.
Example 3
The slump-retaining concrete gel reducer consists of the following raw materials: the high-performance halogen-free flame-retardant modified epoxy resin comprises, by weight, 24 parts of unsaturated organic acid, 84 parts of unsaturated macromonomer, 2 parts of methyl acrylate, 16 parts of sodium allylsulfonate, 4 parts of hydroxyethyl acrylamide phosphate, 14 parts of triisopropanolamine, 10 parts of an initiator, 6 parts of 4-cyano-4- (dodecyl thio-carbonyl) sulfanyl pentanoic acid and 40 parts of water.
The unsaturated organic acid is a mixture of acrylic acid and fumaric acid, wherein the mass ratio of the acrylic acid to the fumaric acid is 3:2.
the unsaturated macromolecular monomer is a mixture of isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 and 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000, wherein the mass ratio of the isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 to the 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000 is 1:1.
the initiator consists of an oxidizing component, a reducing component and a transition metal oxide, wherein the mass ratio of the oxidizing component to the reducing component to the transition metal oxide is 1:1:1.
the oxidation component is 30% hydrogen peroxide, the reduction component is vitamin C, and the transition metal oxide is ferric oxide.
The preparation method of the slump-retaining concrete gel reducer comprises the following steps:
1) Dispersing unsaturated organic acid, hydroxyethyl acrylamide phosphate and methyl acrylate in water to obtain liquid a;
2) Dispersing a reducing component of an initiator and a transition metal oxide in water to obtain liquid b;
3) Adding unsaturated macromonomer, sodium allylsulfonate, an oxidation component of an initiator and 4-cyano-4- (dodecyl thio carbonyl) sulfanyl pentanoic acid into water, stirring and heating to 70 ℃ to obtain liquid c;
4) And dropwise adding the liquid a and the liquid b into the liquid c, keeping the constant temperature at 70 ℃, stirring at the rotating speed of 400rpm, controlling the dropwise adding time to be 4h, then adding triisopropanolamine and water to continuously react for 2h, cooling to room temperature after the reaction is finished, and adjusting the pH value of the solution to 7 to obtain the slump-retaining concrete gel reducer.
Example 4
The slump-retaining concrete gel reducer consists of the following raw materials: the high-performance liquid crystal display panel comprises, by weight, 36 parts of unsaturated organic acid, 72 parts of unsaturated macromonomer, 6 parts of methyl acrylate, 12 parts of sodium allylsulfonate, 8 parts of hydroxyethyl acrylamide phosphate, 6 parts of triisopropanolamine, 6 parts of an initiator, 4 parts of 4-cyano-4- (dodecyl thio-carbonyl) sulfanyl pentanoic acid and 50 parts of water.
The unsaturated organic acid is a mixture of acrylic acid and fumaric acid, wherein the mass ratio of the acrylic acid to the fumaric acid is 2:3.
the unsaturated macromolecular monomer is a mixture of isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 and 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000, wherein the mass ratio of the isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 to the 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000 is 1:2.
the initiator consists of an oxidizing component, a reducing component and a transition metal oxide, wherein the mass ratio of the oxidizing component to the reducing component to the transition metal oxide is 1:1:1.
the oxidation component is 30% hydrogen peroxide, the reduction component is vitamin C, and the transition metal oxide is ferric oxide.
The preparation method of the slump-retaining concrete gel reducer comprises the following steps:
1) Dispersing unsaturated organic acid, hydroxyethyl acrylamide phosphate and methyl acrylate in water to obtain liquid a;
2) Dispersing a reducing component of an initiator and a transition metal oxide in water to obtain liquid b;
3) Adding unsaturated macromonomer, sodium allylsulfonate, an oxidation component of an initiator and 4-cyano-4- (dodecyl thio carbonyl) sulfanyl pentanoic acid into water, stirring and heating to 90 ℃ to obtain liquid c;
4) And dropwise adding the liquid a and the liquid b into the liquid c, keeping the constant temperature at 90 ℃, stirring at the rotating speed of 400rpm, controlling the dropwise adding time to be 4h, then adding triisopropanolamine and water to continuously react for 0.5h, cooling to room temperature after the reaction is finished, and adjusting the pH value of the solution to 7 to obtain the slump-retaining concrete gel reducer.
Example 5
The slump-retaining concrete gel reducing agent consists of the following raw materials: the high-performance organic acid-resistant paint comprises, by weight, 40 parts of unsaturated organic acid, 60 parts of unsaturated macromonomer, 8 parts of methyl acrylate, 6 parts of sodium allylsulfonate, 10 parts of hydroxyethyl acrylamide phosphate, 10 parts of triisopropanolamine, 4 parts of an initiator, 2 parts of thioglycolic acid and 60 parts of water.
The unsaturated organic acid is a mixture of acrylic acid and fumaric acid, wherein the mass ratio of the acrylic acid to the fumaric acid is 2:3.
the unsaturated macromolecular monomer is a mixture of isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 and 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000, wherein the mass ratio of the isoamylene alcohol polyoxyethylene ether with the weight-average molecular weight of 2000-3000 to the 4-hydroxybutyl vinyl polyoxyethylene ether with the weight-average molecular weight of 3000-6000 is 1:3.
the initiator consists of an oxidizing component, a reducing component and a transition metal oxide, wherein the mass ratio of the oxidizing component to the reducing component to the transition metal oxide is 1:1:1.
the oxidation component is 30% hydrogen peroxide, the reduction component is vitamin C, and the transition metal oxide is ferric oxide.
The preparation method of the slump-retaining concrete gel reducer comprises the following steps:
1) Dispersing unsaturated organic acid, hydroxyethyl acrylamide phosphate and methyl acrylate in water to obtain liquid a;
2) Dispersing a reducing component of an initiator and a transition metal oxide in water to obtain a liquid b;
3) Adding unsaturated macromonomer, sodium allylsulfonate, an oxidizing component of an initiator and thioglycolic acid into water, stirring and heating to 80 ℃ to obtain liquid c;
4) And dropwise adding the liquid a and the liquid b into the liquid c, keeping the constant temperature of 80 ℃, stirring at the rotating speed of 500rpm, controlling the dropwise adding time to be 3h, then adding triisopropanolamine and water to continuously react for 1h, cooling to room temperature after the reaction is finished, and adjusting the pH value of the solution to 7 to obtain the slump-retaining concrete gel reducer.
Comparative example 1
The slump-retaining concrete gel reducing agent consists of the following raw materials: the high-performance organic acid-resistant paint comprises, by weight, 40 parts of unsaturated organic acid, 60 parts of unsaturated macromonomer, 8 parts of methyl acrylate, 6 parts of sodium allylsulfonate, 10 parts of hydroxyethyl acrylamide phosphate, 10 parts of triisopropanolamine, 4 parts of an initiator, 2 parts of 4-cyano-4- (dodecyl thio carbonyl) sulfanyl pentanoic acid and 60 parts of water.
The unsaturated organic acid is a mixture of acrylic acid and fumaric acid, wherein the mass ratio of the acrylic acid to the fumaric acid is 2:3.
the unsaturated macromonomer is a mixture of isoamylene alcohol polyoxyethylene ether with the weight average molecular weight of 2000-3000 and 4-hydroxybutyl vinyl polyoxyethylene ether with the weight average molecular weight of 3000-6000, wherein the mass ratio of the isoamylene alcohol polyoxyethylene ether with the weight average molecular weight of 2000-3000 to the 4-hydroxybutyl vinyl polyoxyethylene ether with the weight average molecular weight of 3000-6000 is 1:3.
the initiator consists of an oxidizing component and a reducing component, wherein the mass ratio of the oxidizing component to the reducing component is 1:1.
the oxidizing component is 30% hydrogen peroxide, and the reducing component is vitamin C.
The preparation method of the slump-retaining concrete gel reducer comprises the following steps:
1) Dispersing unsaturated organic acid, hydroxyethyl acrylamide phosphate and methyl acrylate in water to obtain liquid a;
2) Dispersing a reducing component of an initiator in water to obtain liquid b;
3) Adding unsaturated macromonomer, sodium allylsulfonate, an oxidation component of an initiator and 4-cyano-4- (dodecyl thio carbonyl) sulfanyl pentanoic acid into water, stirring and heating to 80 ℃ to obtain liquid c;
4) And dropwise adding the liquid a and the liquid b into the liquid c, keeping the constant temperature of 80 ℃, stirring at the rotating speed of 500rpm, controlling the dropwise adding time to be 3h, then adding triisopropanolamine and water to continuously react for 1h, cooling to room temperature after the reaction is finished, and adjusting the pH value of the solution to 7 to obtain the slump-retaining concrete gel reducer.
Performance evaluation of examples and comparative examples:
the gel reduction rate is tested according to the national standard JC/T2469-2018 concrete gel reduction agent. The mixing proportion of the bleeding test adopts the mixing proportion of the concrete mixed with the high-performance water reducing agent in GB 8076-2008 concrete admixture, and the slump is controlled to be (210 +/-10) mm. The concrete slump and bleeding rate test is carried out according to GB/T50080-2016 Standard test method for the Performance of common concrete mixtures. The concrete mixing proportion is as follows: m (cement): m (sand): m (stone) =360:748:1124, adjusting water consumption according to the slump control value, wherein the folding and fixing mixing amount of the gel reducing agent is 0.15% (relative to the using amount of the cementing material).
Claims (9)
1. Slump retaining type concrete gel reducing agent is characterized in that: the feed consists of the following raw materials: the composition comprises, by mass, 12 to 20% of an unsaturated organic acid, 30 to 45% of an unsaturated macromonomer, 1 to 4% of methyl acrylate, 3 to 8% of sodium allylsulfonate, 2 to 5% of hydroxyethyl acrylamide phosphate, 2 to 7% of an alkanolamine, 2 to 5% of an initiator, 1 to 3% of a chain transfer agent, and the balance of water.
2. The slump-retaining concrete cement reducer according to claim 1, wherein: the unsaturated organic acid is one or more of acrylic acid, butynedioic acid, beta-cinnamic acid and fumaric acid.
3. The slump-retaining concrete cement reducer according to claim 1, wherein: the unsaturated macromonomer is one or more of methallyl polyoxyethylene ether with the weight average molecular weight of 2000-3000, isopentenol polyoxyethylene ether with the weight average molecular weight of 2000-3000, ethylene glycol monovinyl polyglycol ether with the weight average molecular weight of 2000-5000, and 4-hydroxybutyl vinyl polyoxyethylene ether with the weight average molecular weight of 3000-6000.
4. The slump-retaining concrete cement reducer according to claim 1, wherein: the alkanolamine is one or more of triethanolamine, triisopropanolamine and diethanolisopropanolamine.
5. The slump-retaining concrete cement reducer according to claim 1, wherein: the initiator is a redox initiator and comprises an oxidizing component and a reducing component; the oxidation component is one or more of hydrogen peroxide, potassium persulfate, ammonium persulfate and peroxyacetic acid; the reducing component is one or more of vitamin C, ferrous sulfate, oxalic acid and potassium/sodium borohydride.
6. The slump-retaining concrete cement reducer according to claim 5, wherein: the initiator also comprises a transition metal oxide; the transition metal oxide is one or more of ferric oxide, manganese dioxide, cobalt trioxide or zinc oxide.
7. The slump-retaining concrete cement reducer according to claim 1, wherein: the chain transfer agent is one or more of thioglycolic acid, mercaptopropanol, sodium acetate and 4-cyano-4- (dodecyl thio carbonyl) sulfanyl pentanoic acid.
8. The preparation method of the slump-retaining concrete gel reducer according to any one of claims 5 to 7, comprising the following steps:
1) Dispersing unsaturated organic acid, hydroxyethyl acrylamide phosphate and methyl acrylate in water to obtain liquid a;
2) Dispersing a reducing component of an initiator in water to obtain liquid b;
3) Adding unsaturated macromonomer, sodium allylsulfonate, an oxidation component of an initiator and a chain transfer agent into water, stirring and heating to obtain liquid c;
4) And adding the liquid a and the liquid b into the liquid c, keeping the temperature constant and stirring, then adding alkanolamine and water to continue reacting, cooling to room temperature after the reaction is finished, and adjusting the pH value of the solution to obtain the slump-retaining concrete gel reducer.
9. The preparation method of the slump-retaining concrete gel reducer according to claim 8, wherein the preparation method comprises the following steps: the step 2) is replaced by the following steps: and dissolving the reducing component of the initiator and the transition metal oxide in water to obtain liquid b.
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