CN109776021A - A kind of low air-entraining type fair-faced concrete admixture and preparation method thereof - Google Patents
A kind of low air-entraining type fair-faced concrete admixture and preparation method thereof Download PDFInfo
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- CN109776021A CN109776021A CN201910039189.8A CN201910039189A CN109776021A CN 109776021 A CN109776021 A CN 109776021A CN 201910039189 A CN201910039189 A CN 201910039189A CN 109776021 A CN109776021 A CN 109776021A
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- 239000004567 concrete Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 39
- 239000002253 acid Substances 0.000 claims abstract description 37
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 18
- 238000013329 compounding Methods 0.000 claims abstract description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 66
- 239000000654 additive Substances 0.000 claims description 50
- 230000000996 additive effect Effects 0.000 claims description 50
- -1 butylene dibutyl Chemical group 0.000 claims description 35
- 239000000178 monomer Substances 0.000 claims description 31
- 230000003467 diminishing effect Effects 0.000 claims description 27
- 238000007334 copolymerization reaction Methods 0.000 claims description 25
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 24
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 20
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 15
- 238000004132 cross linking Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 10
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 8
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 8
- 229920000570 polyether Polymers 0.000 claims description 7
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 2
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 claims description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims 2
- 239000010959 steel Substances 0.000 claims 2
- 229920003086 cellulose ether Polymers 0.000 claims 1
- 150000003376 silicon Chemical class 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 34
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 32
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 32
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 239000000376 reactant Substances 0.000 description 18
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 16
- 239000004568 cement Substances 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 13
- 239000003999 initiator Substances 0.000 description 11
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 10
- 239000003638 chemical reducing agent Substances 0.000 description 10
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 10
- 239000011976 maleic acid Substances 0.000 description 10
- 238000006116 polymerization reaction Methods 0.000 description 10
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 9
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- JPWOWAPQIVNGQM-UHFFFAOYSA-N C(C=CC)(=O)O.C(C(O)C(O)C(=O)O)(=O)O Chemical compound C(C=CC)(=O)O.C(C(O)C(O)C(=O)O)(=O)O JPWOWAPQIVNGQM-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 230000035484 reaction time Effects 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 6
- 230000032050 esterification Effects 0.000 description 6
- 238000005886 esterification reaction Methods 0.000 description 6
- 239000003112 inhibitor Substances 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 6
- 239000011975 tartaric acid Substances 0.000 description 6
- 235000002906 tartaric acid Nutrition 0.000 description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 5
- 235000019394 potassium persulphate Nutrition 0.000 description 5
- 229960004063 propylene glycol Drugs 0.000 description 5
- 238000010583 slow cooling Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 4
- 150000008065 acid anhydrides Chemical class 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 4
- KOUKXHPPRFNWPP-UHFFFAOYSA-N pyrazine-2,5-dicarboxylic acid;hydrate Chemical compound O.OC(=O)C1=CN=C(C(O)=O)C=N1 KOUKXHPPRFNWPP-UHFFFAOYSA-N 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- DKIDEFUBRARXTE-UHFFFAOYSA-N 3-mercaptopropanoic acid Chemical compound OC(=O)CCS DKIDEFUBRARXTE-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 125000004185 ester group Chemical group 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 3
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 3
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- FKKAGFLIPSSCHT-UHFFFAOYSA-N 1-dodecoxydodecane;sulfuric acid Chemical compound OS(O)(=O)=O.CCCCCCCCCCCCOCCCCCCCCCCCC FKKAGFLIPSSCHT-UHFFFAOYSA-N 0.000 description 2
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000004280 Sodium formate Substances 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethyl mercaptane Natural products CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229920005646 polycarboxylate Polymers 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 2
- 235000019254 sodium formate Nutrition 0.000 description 2
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical group OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 2
- MTJGVAJYTOXFJH-UHFFFAOYSA-N 3-aminonaphthalene-1,5-disulfonic acid Chemical compound C1=CC=C(S(O)(=O)=O)C2=CC(N)=CC(S(O)(=O)=O)=C21 MTJGVAJYTOXFJH-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-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
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000005011 alkyl ether group Chemical group 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000004968 peroxymonosulfuric acids Chemical group 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 1
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 1
- MZSDGDXXBZSFTG-UHFFFAOYSA-M sodium;benzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=CC=C1 MZSDGDXXBZSFTG-UHFFFAOYSA-M 0.000 description 1
- HSFQBFMEWSTNOW-UHFFFAOYSA-N sodium;carbanide Chemical class [CH3-].[Na+] HSFQBFMEWSTNOW-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明公开了一种清水混凝土外加剂，它由聚羧酸系减水组分、保塑组分、引气剂、消泡剂、增粘剂和水经复配而成。本发明针对目前清水混凝土在制备和实际施工中存在的坍落度损失过快和含气量大且不稳定的问题，提出了一种低引气型清水混凝土外加剂，该外加剂的引气作用显著降低，并具有较好的保塑性，用本发明配制的清水混凝土含气量可控制在1.0‑2.5％范围内，可有效解决坍落度损失过快和含气量大且不稳定的问题，且涉及的制备方法简单，适合推广应用。The invention discloses a fair-faced concrete admixture, which is prepared by compounding a polycarboxylic acid-based water-reducing component, a plastic-preserving component, an air-entraining agent, a defoaming agent, a tackifier and water. Aiming at the problems of excessive slump loss and large and unstable air content in the current preparation and actual construction of fair-faced concrete, the invention proposes a low-air-entraining type fair-faced concrete admixture. The air-entraining effect of the admixture is It is significantly reduced and has good plasticity retention. The air content of the fair-faced concrete prepared by the invention can be controlled within the range of 1.0-2.5%, which can effectively solve the problems of excessive slump loss and large and unstable air content, and The preparation method involved is simple and suitable for popularization and application.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of low entraining type clear-water concrete additive and its system
Preparation Method.
Background technique
Domestic and international clear-water concrete additive generallys use the scheme of " first disappear and draw afterwards ", mostly uses polycarboxylate water-reducer, disappears
Infusion and air entraining agent compounding preparation, but the high air content of common polycarboxylate water-reducer water-reducing rate is also high, in order to reach clear water coagulation
The requirement of native low gas content amount needs to mix more defoaming agent, and defoaming agent volume is excessively high, and concrete is without " ball " effect, flowing
Property poor, difference wrapped, easy bleeding is not easy to construct, for the working performance for improving concrete, a certain amount of air entraining agent need to be added, with
Improve the working performance of concrete.But the additive compounded out in this way is very sensitive to the water-cement ratio of concrete, is easy bar bottom,
Water-cement ratio fluctuates in smaller range all air content to concrete, mobility and wrapped can cause large effect, glue
It than slightly increasing, then easily leads to air content and is substantially increased, concrete mirror effect is poor, and water-cement ratio is decreased slightly as low, easily leads to coagulation soil flow
Dynamic property, variation wrapped, are not easy to construct.And in Practical Project there is fluctuation in sand, stone moisture content, water-cement ratio is therewith in smaller range
Therefore interior fluctuation is difficult to meet clear water coagulation simultaneously using the clear-water concrete additive that common polycarboxylic acids water reducing agent compositional goes out
The construction of soil and mirror effect requirement.For this reason, it may be necessary to a kind of low gas content amount is developed, high water reducing rate, the high water-reducing agent for protecting plasticity energy
As additive mother liquor, to compound a small amount of defoaming agent or air entraining agent, to reduce additive to the sensibility of water, to prepare
High water reducing rate, low gas content amount, low water binder ratio sensibility clear-water concrete special additive.
Summary of the invention
Above-mentioned clear-water concrete additive there are aiming at the problem that, the invention proposes a kind of low entraining type clear-water concretes
The air-entraining effect of additive, the additive significantly reduces, and protecting plasticity can significantly improve, the clear-water concrete air content control of mixing
Within the scope of 1.0-2.5%, it can effectively solve the problems, such as that slump-loss is too fast and air content system that is big and unstable, and being related to
Preparation Method is simple, is suitble to promote and apply.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of low entraining type clear-water concrete additive, it moulds component by polycarboxylic-acid diminishing component, guarantor, air entraining agent, disappears
Infusion, tackifier and water are through compounding, and wherein polycarboxylic-acid diminishing component, guarantor mould component, air entraining agent, defoaming agent and tackifier
Mass ratio be 100:(5-25): (0.002-0.005): (0.03-0.07): (0.01-0.10)；Remaining is water, and gained is low
It is 20-25% that research work of air entrained type clear-water concrete additive, which is diluted to solid content,.
In above scheme, polymer of the weight average molecular weight of the polycarboxylic-acid diminishing component in 45000-75000, knot
Structure general formula is shown in Formulas I:
In formula, the value range of a and a ˊ is 22-36；The value range of b and b ˊ is 2-7；The value range of c and c ˊ is 15-
45；The value range of d and d ˊ is 2-6；R and R ˊ is fatty alcohol radical, and C atomic quantity is 12-16；[EO-PO]-is EO (ring
Oxidative ethane)/PO (propylene oxide) random copolymerization section.
In above scheme, the polycarboxylic-acid diminishing component is by butylene dibutyl maleate, methacrylic acid higher aliphatic
Alcohol ester, cross-linking monomer and EO/PO random copolymerization ether acrylate monomer press 12:(1.2-2.4): (6-24): the molar ratio of (1-2)
Through being copolymerized.
In above scheme, the EO/PO random copolymerization ether acrylate monomer molecular weight is 1000-1500, wherein quality
Compare EO/PO=0.6-1.5.
In above scheme, the cross-linking monomer is single contracting 1,2-PD double methyl methacrylate, mostly contracting 1,2-PD
One of double methyl methacrylate, general structure are shown in formula II, and molecular weight is controlled in 200-400:
In formula, m=1-3.
In above scheme, the preparation method of the polycarboxylic-acid diminishing component is the following steps are included: a) randomly total by EO/PO
Polyethers, hydroquinone are added in reaction kettle, are heated with stirring to 60-80 DEG C under nitrogen protection, and acrylic acid is added dropwise, and react 3-5
Hour generates EO/PO random copolymerization ether acrylate, wherein EO/PO random copolymerization ether: acrylic acid=1:1, hydroquinone account for EO/
The 0.1-0.5% of PO random copolymerization ether quality；B) by EO/PO random copolymerization ether acrylate and butylene dibutyl maleate, draw
Hair agent and chain-transferring agent are added in reaction kettle, the agitating and heating reaction kettle under nitrogen protection atmosphere, are warming up to 70-90 DEG C, drop
Methylate higher aliphatic acrylate, cross-linking monomer are added dropwise in 3 hours, and then insulation reaction 3-5 hours；C) delay
Slowly it is cooled to 40-45 DEG C, NaOH solution adjusting PH is added to neutral and obtains the polycarboxylic-acid diminishing component, effective solid content is
40-45%；Wherein, chain initiator is one of ammonium persulfate, potassium peroxydisulfate, sodium peroxydisulfate, and additive amount is that reactant is total
The 10-30% of quality；Chain-transferring agent is mercaptoethanol, thioacetic acid, mercaptopropionic acid, sodium hydrogensulfite, sodium formate, ortho phosphorous acid
One of sodium, additive amount are the 1-10% of reactant gross mass；The reactant gross mass be butylene dibutyl maleate,
The gross mass of methacrylic acid higher aliphatic alcohol ester, cross-linking monomer and EO/PO random copolymerization ether acrylate monomer, maleic acid two
The molar ratio of butanediol ester, methacrylic acid higher aliphatic alcohol ester, cross-linking monomer and EO/PO random copolymerization ether acrylate monomer
For 12:(1.2-2.4): (6-24): (1-2).
In above scheme, the general structure for protecting modeling component is shown in that formula III, molecular weight are controlled in 20000-40000:
In formula, x=1-4；Y=15-34；Z=2-5；S=12-30；Q=1-3.
In above scheme, the preparation method for protecting modeling component is the following steps are included: a) by winestone acid anhydrides and hydroquinone
(polymerization inhibitor) is added in reaction kettle and carries out esterification, and 75-90 DEG C of reaction temperature, reaction time 5-10h, hydroquinone accounts for winestone
The 2- butenoic acid for accounting for tartaric acid quality 5-10% is added dropwise in reaction process by the 0.1-0.5% of sour quality, and polymeric monomer winestone is made
Acid -2- butenoate；B) by maleic acid, hydroquinone (polymerization inhibitor) and two kinds of polyethylene oxide (degree of polymerization is respectively 22 and 13)
Be added in reaction kettle and carry out esterification, reaction temperature is 80-95 DEG C, reaction time 5-10h, hydroquinone account for maleic acid and
The 0.1-0.5% of polyethylene oxide gross mass, the molar ratio of two kinds of polyethylene oxide (degree of polymerization is respectively 22 and 13) are 1:1,
Mass ratio with maleic acid is respectively 1:(3-3.5) and 1:(5-6), two polyethenoxy ether metacrylic acid esters are made；It c) will system
Reaction is added in standby polymeric monomer tartaric acid -2- butenoate and two polyethenoxy ether metacrylic acid esters, initiator, chain-transferring agent
In kettle, 75-85 DEG C is then heated to, sodium styrene sulfonate, butyl methacrylate is added dropwise, time for adding is in 4 hours, then
Insulation reaction 3-5 hours；D) slow cooling is added NaOH solution adjusting PH to neutral and obtains guarantor's modeling component to 40-45 DEG C,
Effective solid content 40-45%；Wherein, chain initiator is one of ammonium persulfate, potassium peroxydisulfate, sodium peroxydisulfate, additive amount
For the 10-30% of reactant gross mass；Wherein, chain-transferring agent be mercaptoethanol, thioacetic acid, mercaptopropionic acid, sodium hydrogensulfite,
One of sodium formate, sodium hypophosphite, additive amount are the 1-10% of reactant gross mass；The reactant gross mass is wine
Stone acid -2- butenoate, two polyethenoxy ether metacrylic acid esters, sodium styrene sulfonate and butylmethacrylate monomer it is total
Quality, tartaric acid -2- butenoate, two polyethenoxy ether metacrylic acid esters, sodium styrene sulfonate and butyl methacrylate
The molar ratio of monomer is 1:(0.5-1): (8-12): (5-15).
In above scheme, the air entraining agent is that air entraining agent is rosin tree lipid, alkyl and alkylated aromatic sulfonic acid class, fatty alcohol
One of Sulfonates air entraining agent is a variety of；Defoaming agent is one of organic silicon, organic silicon modified by polyether class defoaming agent；
The tackifier are one of hydroxymethyl cellulose ether, hydroxyethyl ether cellulose, methyl hydroxyethylcellulose ether.
A kind of preparation method of above-mentioned low entraining type clear-water concrete additive includes the following steps: weighing for 1) raw material:
By polycarboxylic-acid diminishing component, modeling component, air entraining agent, defoaming agent and tackifier are protected by 100:(5-25): (0.002-0.005):
(0.03-0.07): the mass ratio of (0.01-0.10) is weighed；2) by polycarboxylic-acid diminishing component, protect modeling component, air entraining agent,
Defoaming agent, tackifier are compounded, and the solid content for being then diluted with water to gained mixed emulsion is 20-25%.
By above scheme, the low entraining type clear-water concrete additive is applied to prepare clear-water concrete, is added
Amount accounts for the 0.5-2.0% of clear-water concrete gel material content.
The principle of the present invention are as follows: 1) in polycarboxylic-acid diminishing component introduce ethylene oxide/propylene oxide random copolymerization and
Propylene glycol branch increases the physical space steric hindrance hierarchy of diminishing component branch, has delayed moisture and cement in concrete
The contact of grain, while ester group gradually hydrolyzes in cement concrete alkaline environment, forms more COO- groups and and alkali
Property metal ion (Ca2+) formed complex compound, reduce the concentration of Ca2+ in cement, delayed hydration reaction process；2) using tool
The propylene glycol double methyl methacrylate of crosslinking structure increases the space cross-linking properties of diminishing agent molecule, while propylene glycol connects
The more general ester group structure hydrolysis rate of the ester group structure connect is slow, is more advantageous to the diminishing agent molecule middle and later periods and releases COO- group,
The dispersion performance of cement concrete middle and later periods is increased, effectively controls concrete slump gradual loss amount: 3) by guarantor
It moulds component and introduces benzene sulfonic acid sodium salt and branched alkyl ether group, branched hydrophobe is increased, while introducing winestone acid anhydrides, in cement water
Change initial stage can hydrolyze twice of release of hydroxyl and carboxyl, can form water membrane in cement particle surface, it is mixed to increase cement
It coagulates the mobile performance of soil and protects plasticity energy；4) by compounding to defoaming agent, air entraining agent and diminishing component, the surface of water is reduced
Tension, so that the air pocket that itself branch of polycarboxylic-acid component generates gradually is escaped or ruptured, and then it is micro- to increase inside concrete
The quantity of minute bubbles, these micro-bubbles due to surface tension reduction and be stable in the presence of inside concrete, play ball effect
Answer and increase the fluidity and the slump of concrete.
The invention has the benefit that
1) low entraining type clear-water concrete additive of the present invention can significantly improve the slump-loss of clear-water concrete
Amount, basic guarantee inner concrete slump free of losses in 2 hours, slump-loss amount is less than 20mm within 3 hours.
2) by diminishing component, protect that modeling is protected in modeling and air entraining agent, defoaming agent are used in compounding, make newly to mix clear-water concrete initial
Air content control concrete 's air-containing control after 1.0-2.5%, 1 hour guarantees the small gas of inside concrete in 0.8-2.2%
Bubble is stabilized.
3) low entraining type clear-water concrete additive of the present invention is guaranteeing mechanical property and under the premise of workability,
The usage amount that can effectively reduce cement increases the substitution rate of mineral admixture, more saving clear-water concrete production cost.
Specific embodiment
In order to better understand the present invention, the content that the present invention is furture elucidated combined with specific embodiments below, but this hair
Bright content is not limited solely to the following examples.
In following embodiment, unless specific instructions, the reagent of use is commercially available chemical reagent.
In following embodiment, cement is new 42.5 ordinary portland cement of China；Flyash is commercially available II grade of flyash；Rubble
For 5-25mm continuous grading ordinary gravel；Sand is common river sand, sand in category.
In following embodiment, 1) preparation method of the EO/PO atactic polyether includes the following steps: in a high pressure reaction kettle
1,2-PD and potassium hydroxide is added, vacuumizes and carries out nitrogen and replace 3 times；2) 40:60 in mass ratio by ethylene oxide and
Propylene oxide is added in reaction kettle, controls 115 DEG C of temperature, and vacuum kettle pressure is 0.4Mpa, and the reaction time is 6 hours, hydrogen-oxygen
Change 0.25 ‰ that potassium application rate is ethylene oxide and propylene oxide gross mass, 1,2-PD is ethylene oxide and the total matter of propylene oxide
The 20% of amount；3) vacuum dehydration is dried to obtain the EO/PO atactic polyether.
Embodiment 1-3 and comparative example 1:
A kind of low entraining type clear-water concrete special additive, parts by weight shared by each component are shown in Table 1, preparation method packet
Include following steps:
(1) synthesis of polycarboxylic-acid diminishing component
A) EO/PO random copolymerization ether, hydroquinone are added in reaction kettle, are heated with stirring to 65 under nitrogen protection
DEG C, acrylic acid is added dropwise, reacts 4 hours generation EO/PO random copolymerization ether acrylate, wherein EO/PO random copolymerization ether and propylene
The mass ratio of acid is 1:1, and hydroquinone accounts for the 0.4% of EO/PO random copolymerization ether quality；B) by EO/PO random copolymerization ether propylene
Acid esters and butylene dibutyl maleate, initiator and chain-transferring agent are added in reaction kettle, and stirring adds under nitrogen protection atmosphere
Thermal response kettle is warming up to 85 DEG C, and methacrylic acid higher aliphatic alcohol ester (carbon atom number 13), single contracting 1,2-PD pair is added dropwise
Methacrylate is added dropwise in 3 hours, then insulation reaction 4 hours；C) it is molten that NaOH is added to 40 DEG C in slow cooling
Liquid adjusts PH and obtains the polycarboxylic-acid diminishing component, effective solid content 43% to neutral；Wherein, chain initiator is persulfuric acid
Mixture obtained by the mass ratio of ammonium, potassium peroxydisulfate by 1:1, additive amount are the 18% of reactant gross mass；Chain-transferring agent is Asia
Sodium bisulfate, additive amount are the 6% of reactant gross mass；The reactant gross mass is butylene dibutyl maleate, methyl
Higher aliphatic acrylate (carbon atom number 13), single contracting 1,2- propylene glycol double methyl methacrylate and EO/PO random copolymerization
The gross mass of ether acrylate monomer, butylene dibutyl maleate, methacrylic acid higher aliphatic alcohol ester, cross-linking monomer and EO/
The molar ratio of PO random copolymerization ether acrylate monomer is 12:1.5:18:1.8, and gained polycarboxylic-acid diminishing component is divided equally again
Son amount is 45000-51000, and structural formula is shown in formula IV:
(2) synthesis of modeling component is protected
A) winestone acid anhydrides and hydroquinone (polymerization inhibitor) are added in reaction kettle and carry out esterification, 85 DEG C of reaction temperature,
Reaction time 5h, hydroquinone account for the 0.5% of tartaric acid quality, the 2- butylene for accounting for tartaric acid quality 7% are added dropwise in reaction process
Polymeric monomer tartaric acid -2- butenoate is made in acid；B) maleic acid, hydroquinone (polymerization inhibitor) and two kinds of polyethylene oxide are (poly-
Right to be respectively 22 and 13) be added in reaction kettle and carry out esterification, reaction temperature is 80 DEG C, reaction time 10h, to benzene two
Phenol accounts for the 0.4% of maleic acid and polyethylene oxide gross mass, mole of two kinds of polyethylene oxide (degree of polymerization is respectively 22 and 13)
Than for 1:1, the mass ratio of they and maleic acid is respectively 1:3.4 and 1:5.5, and two polyethenoxy ether metacrylic acid esters are made；
C) the polymeric monomer tartaric acid -2- butenoate and two polyethenoxy ether metacrylic acid esters, initiator, chain-transferring agent of preparation are added
Enter in reaction kettle, then heat to 85 DEG C, sodium styrene sulfonate, butyl methacrylate is added dropwise, time for adding in 4 hours,
Then insulation reaction 4 hours；D) slow cooling is added NaOH solution adjusting PH to neutral and obtains guarantor's modeling component to 40 DEG C,
Effective solid content is 43%；Wherein, chain initiator is potassium peroxydisulfate, and additive amount is the 28% of reactant gross mass；Wherein, chain
Transfer agent is thioacetic acid, and additive amount is the 5% of reactant gross mass；The reactant gross mass is tartaric acid -2- butylene
Acid esters, two polyethenoxy ether metacrylic acid esters, sodium styrene sulfonate and butylmethacrylate monomer gross mass, winestone
Acid -2- butenoate, two polyethenoxy ether metacrylic acid esters, sodium styrene sulfonate and butylmethacrylate monomer mole
Than for 1:8:0.8:6；The molecular weight that gained protects modeling component is 20000-25000, and structural formula is shown in Formula V:
(3) compounding of clear-water concrete special additive
By prepared poly carboxylic acid series water reducer component, protect modeling component, LP.HW10 dodecyl ether sulfate (bleed
Agent), the hydroxymethyl cellulose ether tackifier of PAC organic silicon defoaming agent and molecular weight 100000 compounded, compounded formula
It is shown in Table 1, is then diluted with water to the solid containing dedicated outer to get the low entraining type clear-water concrete for 25% of gained mixed emulsion
Add agent.
The compounded formula (parts by weight) of additive described in 1 embodiment 1-3 of table and comparative example 1
By embodiment 1-3 and 1 products therefrom of comparative example carry out respectively flowing degree of net paste of cement test, setting time test and
Cement mortar strength test.Wherein, paste flowing degree test is according to GB8077-2012 " Methods for testing uniformity of concrete admixture " phase
Regulation is closed to be tested；Setting time measures according to GB8076-2008 " concrete admixture " method；Mix the mortar stream of additive
Within the scope of 180mm ± 5mm, measurement result is shown in Table 2 for dynamic degree control.
The flowing degree of net paste of cement of 2 embodiment 1-3 of table and 1 products therefrom of comparative example and setting time result
The above results show that the dispersion effect of additive obtained by Examples 1 to 3 is excellent, and pulp flowage after 2 hours
Degree loss amount is small, longer compared with the guarantor's modeling time for singly mixing polycarboxylic-acid diminishing component, and setting time slightly extends.
Embodiment 4-6, comparative example 2
A kind of low entraining type clear-water concrete special additive, parts by weight shared by each component are shown in Table 3, preparation method packet
Include following steps:
(1) synthesis of polycarboxylic-acid diminishing component
A) EO/PO random copolymerization ether, hydroquinone are added in reaction kettle, are heated with stirring to 70 under nitrogen protection
DEG C, acrylic acid is added dropwise, reacts 4.5 hours generation EO/PO random copolymerization ether acrylate, wherein EO/PO random copolymerization ether and third
The mass ratio of olefin(e) acid is 1:1, and hydroquinone accounts for the 0.3% of EO/PO random copolymerization ether quality；B) by EO/PO random copolymerization ether third
Olefin(e) acid ester and butylene dibutyl maleate, initiator and chain-transferring agent are added in reaction kettle, stir under nitrogen protection atmosphere
Reaction kettle is heated, is warming up to 80 DEG C, methacrylic acid higher aliphatic alcohol ester (carbon atom number 15), three contracting 1,2-PDs is added dropwise
Double methyl methacrylate is added dropwise in 3 hours, then insulation reaction 5 hours；C) NaOH is added to 45 DEG C in slow cooling
Solution adjusts PH and obtains the polycarboxylic-acid diminishing component, effective solid content 44% to neutral；Wherein, chain initiator is over cure
Sour ammonium, additive amount are the 22% of reactant gross mass；Chain-transferring agent is sodium hydrogensulfite and sodium hypophosphite mass ratio 1:1
Mixture, additive amount are the 7% of reactant gross mass；The reactant gross mass is butylene dibutyl maleate, methyl-prop
Olefin(e) acid higher aliphatic alcohol ester (carbon atom number 15), single contracting 1,2- propylene glycol double methyl methacrylate and EO/PO random copolymerization ether
The gross mass of acrylate monomer, butylene dibutyl maleate, methacrylic acid higher aliphatic alcohol ester, cross-linking monomer and EO/PO
The molar ratio of random copolymerization ether acrylate monomer is 12:2:15:1；The weight average molecular weight of gained polycarboxylic-acid diminishing component is
50000-55000, structural formula are shown in Formula IV:
(2) synthesis of modeling component is protected
A) winestone acid anhydrides and hydroquinone (polymerization inhibitor) are added in reaction kettle and carry out esterification, 80 DEG C of reaction temperature,
Reaction time 6h, hydroquinone account for the 0.4% of tartaric acid quality, the 2- butylene for accounting for tartaric acid quality 8% are added dropwise in reaction process
Polymeric monomer tartaric acid -2- butenoate is made in acid；B) maleic acid, hydroquinone (polymerization inhibitor) and two kinds of polyethylene oxide are (poly-
Right to be respectively 22 and 13) be added in reaction kettle and carry out esterification, reaction temperature is 90 DEG C, reaction time 8h, to benzene two
Phenol accounts for the 0.4% of maleic acid and polyethylene oxide gross mass, mole of two kinds of polyethylene oxide (degree of polymerization is respectively 22 and 13)
Than for 1:1, the mass ratio with maleic acid is respectively 1:3.2 and 1:5, two polyethenoxy ether metacrylic acid esters are made；It c) will system
Reaction is added in standby polymeric monomer tartaric acid -2- butenoate and two polyethenoxy ether metacrylic acid esters, initiator, chain-transferring agent
In kettle, 80 DEG C are then heated to, sodium styrene sulfonate, butyl methacrylate is added dropwise, then time for adding is protected in 4 hours
Temperature reaction 3 hours；D) slow cooling is to 40 DEG C, and addition NaOH solution adjusts PH and obtains guarantor's modeling component to neutral, effectively admittedly
Content 42%；Wherein, chain initiator is potassium peroxydisulfate, and additive amount is the 25% of reactant gross mass；Wherein, chain-transferring agent is
Thioacetic acid and mercaptopropionic acid press the resulting mixture of mass ratio of 2:1, and additive amount is the 8% of reactant gross mass；It is described
Reactant gross mass is tartaric acid -2- butenoate, two polyethenoxy ether metacrylic acid esters, sodium styrene sulfonate and methyl-prop
The gross mass of olefin(e) acid butyl ester monomer, tartaric acid -2- butenoate, two polyethenoxy ether metacrylic acid esters, sodium styrene sulfonate
Molar ratio with butylmethacrylate monomer is 1:10:0.7:8；The molecular weight that gained protects modeling component is 30000-35000, knot
Structure formula is shown in Formula VII:
(3) compounding of clear-water concrete special additive
By prepared poly carboxylic acid series water reducer component, protect modeling component, 3N70 dodecyl ether sulfate air entraining agent,
M.2005 the hydroxymethyl cellulose ether tackifier of polyethers defoaming agent and molecular weight 100000 are compounded, and compounded formula is shown in Table
3, the solid content for being then diluted with water to gained mixed emulsion is 25% dedicated additional to get the low entraining type clear-water concrete
Agent.
The compounded formula (parts by weight) of additive obtained by 3 embodiment 4-6 of table
Additive uses the YJ-1 type poly carboxylic acid series water reducer of commercially available Jiangsu Bo Te production in comparative example 2, effectively contains admittedly
It is 25%.
YJ-1 type poly carboxylic acid series water reducer described in embodiment 4-6 products therefrom and comparative example 2 is subjected to pulp flowage
Degree test, setting time test and cement mortar strength test.Wherein, paste flowing degree test is according to GB8077-2012 " outside concrete
Adding agent homogeneity test method " relevant regulations are tested；Setting time is according to the side GB 8076-2008 " concrete admixture "
Method measurement, the Mortar'S Flowability for mixing additive control within the scope of 180mm ± 5mm, and measurement result is shown in Table 4.
The flowing degree of net paste of cement and setting time result of water-reducing agent described in 4 embodiment 4-6 products therefrom of table and comparative example 2
The above results show that the dispersion effect of 4~6 gained additive of embodiment is excellent, and pulp flowage after 2 hours
Degree loss amount is small, and model retention effect is good, is relatively generally extended with poly carboxylic acid series water reducer setting time, is more advantageous to clear-water concrete
Long range long-time pumping construction.
Claims (9)
1. a kind of low entraining type clear-water concrete additive, which is characterized in that it by polycarboxylic-acid diminishing component, protect modeling component,
Air entraining agent, defoaming agent, tackifier and water are through compounding, and wherein polycarboxylic-acid diminishing component, guarantor mould component, air entraining agent, defoaming
The mass ratio of agent and tackifier is 100:(5-25): (0.002-0.005): (0.03-0.07): (0.01-0.10)；Remaining is
Gained low entraining type clear-water concrete additive is diluted to solid contain for 20-25% by water；
The general structure for protecting modeling component is shown in that formula III, molecular weight are controlled in 20000-40000:
In formula, x=1-4；Y=15-34；Z=2-5；S=12-30；Q=1-3.
2. low entraining type clear-water concrete additive according to claim 1, which is characterized in that the polycarboxylic-acid diminishing
The weight average molecular weight of component is 45000-75000, and general structure is shown in Formulas I:
In formula, the value range of a and a ˊ is 22-36；The value range of b and b ˊ is 2-7；The value range of c and c ˊ is 15-45；d
Value range with d ˊ is 2-6；R and R ˊ is fatty alcohol radical, and C atomic quantity is 12-16；[EO-PO]-is that EO/PO is random
It is copolymerized section.
3. low entraining type clear-water concrete additive according to claim 2, which is characterized in that the polycarboxylic-acid diminishing
Component is by butylene dibutyl maleate, methacrylic acid higher aliphatic alcohol ester, cross-linking monomer and EO/PO random copolymerization ether acrylic acid
Ester monomer is by 12:(1.2-2.4): (6-24): the molar ratio of (1-2) is through being copolymerized.
4. low entraining type clear-water concrete additive according to claim 2, which is characterized in that the EO/PO is randomly total
Polyether acrylate monomer molecule amount is 1000-1500, wherein mass ratio EO/PO=0.6-1.5.
5. low entraining type clear-water concrete additive according to claim 3, which is characterized in that the cross-linking monomer is single
One of contracting 1,2-PD double methyl methacrylate, more contracting 1,2-PD double methyl methacrylates, general structure is shown in formula
II, molecular weight is controlled in 200-400:
In formula, m=1-3.
6. low entraining type clear-water concrete additive according to claim 1, which is characterized in that the air entraining agent is rosin
One of resinae, alkyl and alkylated aromatic sulfonic acid class, fatty alcohol sulfonate class air entraining agent are a variety of.
7. low entraining shape steel tube slow setting soil additive according to claim 1, which is characterized in that the defoaming agent is organic
One of silicon class, organic silicon modified by polyether class defoaming agent.
8. low entraining shape steel tube slow setting soil additive according to claim 1, which is characterized in that the tackifier are hydroxyl first
One of base cellulose ether, hydroxyethyl ether cellulose, methyl hydroxyethylcellulose ether.
9. the preparation method of any one of the claim 1-8 low entraining type clear-water concrete additive, which is characterized in that including
Following steps: 1) raw material weighs: by polycarboxylic-acid diminishing component, modeling component, air entraining agent, defoaming agent and tackifier are protected by 100:
(5-25): (0.002-0.005): (0.03-0.07): the mass ratio of (0.01-0.10) is weighed；2) by polycarboxylic-acid diminishing
Component, guarantor's modeling component, air entraining agent, defoaming agent, tackifier are compounded, and are then diluted with water to consolidating for mixed emulsion of gained and are contained
20-25%.
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| CN112159151A (en) * | 2020-10-16 | 2021-01-01 | 吉安市金羧科技有限公司 | Pumping agent and preparation method thereof |
| CN113880530A (en) * | 2021-11-17 | 2022-01-04 | 贵州大学 | Preparation method of self-compacting fair-faced concrete in tunnel secondary lining |
| CN114276550A (en) * | 2021-12-22 | 2022-04-05 | 东南大学 | Organic-inorganic composite additive for fair-faced concrete and preparation method and application thereof |
| CN115872665A (en) * | 2022-12-27 | 2023-03-31 | 沈阳泰丰特种混凝土有限公司 | Additive for prolonging concrete plastic-retaining time and concrete preparation method |
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Application publication date: 20190521 |
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