CN109851273A - A kind of early-strength polycarboxylate composite water reducing agent and preparation method thereof - Google Patents
A kind of early-strength polycarboxylate composite water reducing agent and preparation method thereof Download PDFInfo
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- CN109851273A CN109851273A CN201910171084.8A CN201910171084A CN109851273A CN 109851273 A CN109851273 A CN 109851273A CN 201910171084 A CN201910171084 A CN 201910171084A CN 109851273 A CN109851273 A CN 109851273A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 79
- 229920005646 polycarboxylate Polymers 0.000 title claims abstract description 42
- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims abstract description 33
- 239000004567 concrete Substances 0.000 claims abstract description 20
- 239000002253 acid Substances 0.000 claims abstract description 19
- 239000000178 monomer Substances 0.000 claims abstract description 16
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 12
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 10
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 8
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 7
- 150000002085 enols Chemical class 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 5
- 239000003999 initiator Substances 0.000 claims abstract description 5
- 239000007864 aqueous solution Substances 0.000 claims abstract description 4
- 238000007334 copolymerization reaction Methods 0.000 claims abstract description 4
- 150000003254 radicals Chemical class 0.000 claims abstract description 4
- 239000003054 catalyst Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 13
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 7
- 239000008030 superplasticizer Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- ALWXETURCOIGIZ-UHFFFAOYSA-N 1-nitropropylbenzene Chemical group CCC([N+]([O-])=O)C1=CC=CC=C1 ALWXETURCOIGIZ-UHFFFAOYSA-N 0.000 claims description 3
- SOIAEOTUSNFHMI-UHFFFAOYSA-N 2-(2-aminoethylamino)ethane-1,1-diol Chemical compound NCCNCC(O)O SOIAEOTUSNFHMI-UHFFFAOYSA-N 0.000 claims description 3
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 3
- SOIFLUNRINLCBN-UHFFFAOYSA-N ammonium thiocyanate Chemical compound [NH4+].[S-]C#N SOIFLUNRINLCBN-UHFFFAOYSA-N 0.000 claims description 3
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 2
- KTLIZDDPOZZHCD-UHFFFAOYSA-N 3-(2-aminoethylamino)propan-1-ol Chemical compound NCCNCCCO KTLIZDDPOZZHCD-UHFFFAOYSA-N 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 claims 1
- 239000012986 chain transfer agent Substances 0.000 claims 1
- 230000000977 initiatory effect Effects 0.000 claims 1
- 150000002484 inorganic compounds Chemical class 0.000 claims 1
- 229910010272 inorganic material Inorganic materials 0.000 claims 1
- SXTGAOTXVOMSFW-UHFFFAOYSA-L magnesium;dithiocyanate Chemical compound [Mg+2].[S-]C#N.[S-]C#N SXTGAOTXVOMSFW-UHFFFAOYSA-L 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 9
- 230000004048 modification Effects 0.000 abstract description 6
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- 150000001875 compounds Chemical class 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 5
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- 239000000654 additive Substances 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011178 precast concrete Substances 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 abstract 1
- 239000002585 base Substances 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 239000008367 deionised water Substances 0.000 description 12
- 229910021641 deionized water Inorganic materials 0.000 description 12
- 230000000694 effects Effects 0.000 description 12
- -1 Ether acrylic ester Chemical class 0.000 description 8
- PHTQWCKDNZKARW-UHFFFAOYSA-N isoamylol Chemical compound CC(C)CCO PHTQWCKDNZKARW-UHFFFAOYSA-N 0.000 description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 7
- 239000004568 cement Substances 0.000 description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- 150000007513 acids Chemical class 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- DKIDEFUBRARXTE-UHFFFAOYSA-N 3-mercaptopropanoic acid Chemical compound OC(=O)CCS DKIDEFUBRARXTE-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical class [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N alpha-methacrylic acid Natural products CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 235000019255 calcium formate Nutrition 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010792 warming Methods 0.000 description 4
- 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 description 3
- 150000001408 amides Chemical class 0.000 description 3
- 235000021050 feed intake Nutrition 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- JPAOMENBKRZQDR-UHFFFAOYSA-N CC=CC.[Na] Chemical compound CC=CC.[Na] JPAOMENBKRZQDR-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000003467 diminishing effect Effects 0.000 description 2
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- 230000037048 polymerization activity Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
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- 239000002002 slurry Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- DURXMRVEOKCAMC-UHFFFAOYSA-N 3-(2-aminoethylamino)propane-1,1-diol Chemical compound NCCNCCC(O)O DURXMRVEOKCAMC-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-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
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- BOOMOFPAGCSKKE-UHFFFAOYSA-N butane-2-sulfonic acid;prop-2-enamide Chemical compound NC(=O)C=C.CCC(C)S(O)(=O)=O BOOMOFPAGCSKKE-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical compound C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229940068917 polyethylene glycols Drugs 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 239000011734 sodium Substances 0.000 description 1
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Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to technical field of concrete additives, a kind of early-strength polycarboxylate composite water reducing agent and preparation method thereof is disclosed；The early-strength composite water-reducing agent is based on polycarboxylic acid polymer, and compound preferred accelerating component is formulated, wherein polycarboxylic acid polymer refer to using the modification enol base polyoxyethylene ether containing unsaturated double-bond, aliphatic unsaturated double-bond three kinds of monomers of sulfonate and unsaturated carboxylic acid as primary raw material, under the action of initiator and chain-transferring agent；Cause progress aqueous solution copolymerization by free radical and obtains poly carboxylic acid series water reducer.Early-strength polycarboxylate composite water reducing agent volume prepared by the present invention is small, and alkali content is low, and water-reducing rate is high, and early strength improves significantly, and product stability is good；Preparation process is simple, non-environmental-pollution, can be widely applied under lower temperature conditions that there are the various concrete engineering constructions of early strong demand to have a good application prospect especially suitable for the low energy consumption production technology of precast concrete.
Description
Technical field
The invention belongs to technical field of concrete additives more particularly to a kind of early-strength polycarboxylate composite water reducing agent and its
Preparation method.
Background technique
Currently, the immediate prior art: with flourishing for Concrete and construction technology, water-reducing agent is as mixed
One of most important member in solidifying soil chemical admixture, more and more by the concern of domestic and international researcher, and for high water reduction,
The demand of the Early-strength polycarboxylate superplasticizer of high morning epistasis energy is also more and more urgent.
Early-strength polycarboxylate superplasticizer can accelerate hydrated cementitious, improve working performance of concrete, effectively shorten concrete
Setting time, hence it is evident that improve early strength of concrete, thus irreplaceable role is played to the development of modern concrete.It mentions
There are two the technological approaches of higher polycarboxylic acid based water reducer morning epistasis energy is main: first is that by Molecular Design, synthesis has itself
There is the poly carboxylic acid series water reducer of early strong effect；Second is that accelerating component is compounded with plain edition poly carboxylic acid series water reducer.Really
Realize that the study on the synthesis of high-early strength type polycarboxylic acids dehydragent explores rank also in starting at present from polymer molecular structure design
Section, matured product is seldom, and commercially available polycarboxylate water-reducer directly compounded with accelerating component made of Early-strength polycarboxylate superplasticizer
There is the problems such as stability difference and big volume in product, therefore, pass through research poly carboxylic acid series water reducer molecular structure and performance again
Relationship synthesizes high water reduction poly carboxylic acid series water reducer and is compounded with early strength agent, obtains the early strong of the early epistasis energy of high water reduction, height
Type polycarboxylate composite water reducing agent will be with great economy, environment and social effect.
The prior art one provides a kind of high-early strength type polycarboxylic acids dehydragent, by two kinds of polyethyleneglycols of different chain numbers
Ether esters of acrylic acid polymeric monomer, (methyl) acrylic acid, Sodium Allyl Sulfonate or methylpropene sodium sulfonate, gathering with defoaming function
Ether acrylic ester monomer takes the mode once to feed intake to carry out copolyreaction preparation under the conditions of nitrogen protection.Metering system
The monomer reactivities such as acid are stronger, are easy autohemagglutination, and the mode once to feed intake is taken in the invention, therefore can produce between effect is copolymerized monomer
Raw adverse effect, is difficult to control molecular weight, so as to cause properties of product decline.
The prior art two provides a kind of high-early strength type polycarboxylic acids dehydragent, by methyl allyl polyoxyethylene ether, propylene
The monomers such as amide, methylpropene sodium sulfonate, acrylic or methacrylic acid, acroleic acid esterification hydramine molecular weight chain initiator,
Neutralization preparation is carried out after being polymerize under the action of chain-transferring agent again.The amides group that the patent uses can accelerate cement water
Change, realize early stage reinforcing effect, but in the cement slurry of alkalinity, amide group will be hydrolyzed gradually, release ammonia, environment is dirty
It contaminates larger.
The prior art three provides a kind of high-early strength type polycarboxylic acids dehydragent, by unsaturated polyether DD-406, acrylic acid, third
Five kinds of alkene sodium sulfonate, 21 acrylamide monomethyl propane sulfonic acid, acrylamide monomers are total under molecular weight regulator existence condition
Poly- preparation.Sodium allylsulfonate polymerization activity is lower, and chain tra nsfer effect is obvious, and polycarboxylate water-reducer molecule amount obtained is relatively low, real
Easily occurs the problems such as function of slump protection is insufficient, comprehensive performance is unbalance in the application process of border.
In conclusion problem of the existing technology is:
(1) monomer reactivities such as prior art monomethyl acrylic acid are stronger, are easy autohemagglutination, and take the mode once to feed intake,
Therefore adverse effect can be generated between effect is copolymerized monomer, is difficult to control molecular weight, properties of product is caused to decline.
(2) the amides group that the prior art two uses can accelerate hydrated cementitious, early stage reinforcing effect be realized, in alkalinity
Cement slurry in, amide group will be hydrolyzed gradually, release ammonia, and environmental pollution is larger.
(3) three sodium allylsulfonate polymerization activity of the prior art is lower, and chain tra nsfer effect is obvious, polycarboxylate water-reducer obtained
Molecular weight is relatively low, easily occurs the problems such as function of slump protection is insufficient, comprehensive performance is unbalance in actual application.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of early-strength polycarboxylate composite water reducing agent and its preparations
Method.
The invention is realized in this way a kind of early-strength polycarboxylate composite water reducing agent, the early-strength polycarboxylic acids is compound to be subtracted
Aqua is compounded based on poly carboxylic acid series water reducer with organic accelerating component and inorganic early powerful catalyst；
By mass fraction by 30~60 parts of poly carboxylic acid series water reducer, 3~10 parts of organic accelerating component, inorganic early powerful catalyst
20~50 parts and 50~80 parts of water compositions.
Further, the poly carboxylic acid series water reducer include with the modification enol base polyoxyethylene ether containing unsaturated double-bond,
Three kinds of monomers of sulfonate and unsaturated carboxylic acid of aliphatic unsaturated double-bond pass through under the action of initiator and chain-transferring agent
Obtained from free radical causes progress aqueous solution copolymerization, solid content 40%.
Further, organic accelerating component is triethanolamine, triisopropanolamine, dihydroxy ethyl ethylenediamine, dihydroxypropyl
Any one or the combination of several of them in ethylenediamine.
Further, the strong catalyst component of inorganic morning be calcium thiocyanate, sodium sulfocyanate, magnesium rhodanate, ammonium thiocyanate, in
Any one or the combination of several of them.
Further, the addition content of the early-strength polycarboxylate composite water reducing agent be concrete gross mass 1.0~
2.0wt%.
It is described another object of the present invention is to provide a kind of preparation method of early-strength polycarboxylate composite water reducing agent
The preparation method of early-strength polycarboxylate composite water reducing agent includes:
(1) poly carboxylic acid series water reducer include with the modification enol base polyoxyethylene ether containing unsaturated double-bond, aliphatic not
It is saturated three kinds of monomers of sulfonate and unsaturated carboxylic acid of double bond；
(2) it based on poly carboxylic acid series water reducer, is compounded with organic accelerating component and inorganic early powerful catalyst, by matter
Number is measured in 30~60 parts of poly carboxylic acid series water reducer, 3~10 parts of organic accelerating component, inorganic early 20~50 parts of powerful catalyst, water
50~80 parts；It is stirred mixing 10~30 minutes, obtains early-strength polycarboxylate composite water reducing agent.
Another object of the present invention is to provide a kind of concrete comprising the early-strength polycarboxylate composite water reducing agent.
In conclusion advantages of the present invention and good effect are as follows: the present invention uses water solution polymerization process, in molecular-weight adjusting
Unsaturated monomer is copolymerized under the action of agent, and being prepared into has compared with low relative molecular mass, moderate side chain density, higher sulfonic acid
The polycarboxylate water-reducer of root, carboxylate radical polar group content, after again with early strength agent carry out it is compound, it is compound to obtain early-strength polycarboxylic acids
Water-reducing agent；Gained water-reducing agent steric hindrance effect increase, cement dispersibility enhancing, early hydration speed accelerate, so have compared with
Good early epistasis energy.
The water-reducing rate of early-strength type polycarboxylate composite water reducing agent is high；Volume is low, and overall cost is with the obvious advantage；It is free of
Villaumite acts on reinforcing bar non-corroding；Compatibility is good between each component, and long term storage is uniform and stable；Guarantor's effect of collapsing is good；Early epistasis can be excellent
It is different；Under cryogenic conditions, the intensity of concrete each age can be significantly improved, is mixed suitable for large dosage mineral under lower temperature conditions
Construction and the production of precast concrete etc. for closing material concrete, accelerate concrete construction progress, improve construction
Efficiency；Preparation process is easy to operate.
Detailed description of the invention
Fig. 1 is the preparation method flow chart of early-strength polycarboxylate composite water reducing agent provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The present invention introduces specific groups in polycarboxylate water-reducer molecule structure, by the degree of polymerization and the side that control polymer
Chain density optimizes comb-shaped copolymer molecular structure, then polycarboxylate water-reducer obtained by polymerization and early strength agent is carried out compound, quickening
Hydrated cementitious；Obtain that a kind of volume is small, water-reducing rate is high, concrete coagulating time is short, early strength is high, working performance and adaptability
Excellent novel early-strength polycarboxylate composite water reducing agent.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
Early-strength polycarboxylate composite water reducing agent provided in an embodiment of the present invention is and organic based on poly carboxylic acid series water reducer
Accelerating component and inorganic early powerful catalyst compounding；
By mass fraction by 30~60 parts of poly carboxylic acid series water reducer, 3~10 parts of organic accelerating component, inorganic early powerful catalyst
20~50 parts and 50~80 parts of water compositions.
In a preferred embodiment of the invention, poly carboxylic acid series water reducer includes with the modification enol base containing unsaturated double-bond
Three kinds of polyoxyethylene ether, the sulfonate of aliphatic unsaturated double-bond and unsaturated carboxylic acid monomers, in initiator and chain-transferring agent
Under effect, progress aqueous solution copolymerization is caused by free radical and is obtained, solid content 40%.
In a preferred embodiment of the invention, organic accelerating component is triethanolamine, triisopropanolamine, dihydroxy ethyl second two
Any one or the combination of several of them in amine, dihydroxypropyl ethylenediamine.
In a preferred embodiment of the invention, strong catalyst component of inorganic morning be calcium thiocyanate, sodium sulfocyanate, magnesium rhodanate,
Ammonium thiocyanate, in any one or the combination of several of them.
In a preferred embodiment of the invention, the addition content of early-strength polycarboxylate composite water reducing agent is concrete gross mass
1.0~2.0wt%.
As shown in Figure 1, the preparation method of early-strength polycarboxylate composite water reducing agent provided in an embodiment of the present invention includes following
Step:
S101: based on poly carboxylic acid series water reducer, poly carboxylic acid series water reducer includes with the modification containing unsaturated double-bond
Three kinds of enol base polyoxyethylene ether, the sulfonate of aliphatic unsaturated double-bond and unsaturated carboxylic acid monomers；
S102: it is compounded with organic accelerating component and inorganic early powerful catalyst, by mass fraction in polycarboxylic-acid diminishing
30~60 parts of agent, 3~10 parts of organic accelerating component, inorganic early 20~50 parts of powerful catalyst, 50~80 parts of water；It is stirred mixing
10~30 minutes, obtain early-strength polycarboxylate composite water reducing agent.
Application principle of the invention is further described combined with specific embodiments below.
Embodiment 1
Step 1: preparing A material: using 2.64 parts of methylpropene sodium sulfonates of deionized water dissolving, after stirring and dissolving, be added 9.60
Part acrylic acid, stirs evenly spare；
Step 2: preparing B material: using 0.54 part of mercaptopropionic acid of deionized water dissolving；
Step 3: dissolved 95 parts of isoamyl alcohol polyoxyethylene ethers that molecular weight is 3800 with deionized water, it is rear to be added
1.07 parts of ammonium persulfates, are warming up to 60 ± 2 DEG C, at the uniform velocity dropwise addition A, B material, and A expects that time for adding is 1.5h, and B expects that time for adding is 2h；
Step 4: constant temperature 2.5h, obtains poly carboxylic acid series water reducer.
Step 5: take 42 parts of the poly carboxylic acid series water reducer (concentration 40%) of above-mentioned preparation, then under stirring according to
60 parts of water of secondary addition, 4 parts of triethanolamines, 21 parts of magnesium rhodanates, 10 parts of calcium formates, sufficiently dissolution stand to get the poly- carboxylic of early-strength
Sour composite water-reducing agent.
Embodiment 2
Step 1: preparing A material: using 2.15 parts of methylpropene sodium sulfonates of deionized water dissolving, after stirring and dissolving, be added 9.82
Part acrylic acid, stirs evenly spare；
Step 2: preparing B material: using 0.54 part of mercaptopropionic acid of deionized water dissolving；
Step 3: dissolved 95 parts of isoamyl alcohol polyoxyethylene ethers that molecular weight is 3800 with deionized water, it is rear to be added
1.07 parts of ammonium persulfates, are warming up to 60 ± 2 DEG C, at the uniform velocity dropwise addition A, B material, and A expects that time for adding is 1.5h, and B expects that time for adding is 2h；
Step 4: constant temperature 2.5h, obtains poly carboxylic acid series water reducer.
Step 5: take 40 parts of the poly carboxylic acid series water reducer (concentration 40%) of above-mentioned preparation, then under stirring according to
63 parts of water of secondary addition, 3.5 parts of triethanolamines, 18 parts of magnesium rhodanates, 11 parts of calcium formates, sufficiently dissolution stand poly- to get early-strength
Carboxylic acid composite water-reducing agent.
Embodiment 3
Step 1: preparing A material: using 3.51 parts of methylpropene sodium sulfonates of deionized water dissolving, after stirring and dissolving, be added
12.80 parts of acrylic acid, stir evenly spare；
Step 2: preparing B material: using 0.56 part of mercaptopropionic acid of deionized water dissolving；
Step 3: dissolved 95 parts of isoamyl alcohol polyoxyethylene ethers that molecular weight is 3800 with deionized water, it is rear to be added
1.11 parts of ammonium persulfates, are warming up to 60 ± 2 DEG C, at the uniform velocity dropwise addition A, B material, and A expects that time for adding is 1.5h, and B expects that time for adding is 2h；
Step 4: constant temperature 2.5h, obtains poly carboxylic acid series water reducer.
Step 5: take 44 parts of the poly carboxylic acid series water reducer (concentration 40%) of above-mentioned preparation, then under stirring according to
58 parts of water of secondary addition, 4.5 parts of triethanolamines, 22 parts of magnesium rhodanates, 13 parts of calcium formates, sufficiently dissolution stand poly- to get early-strength
Carboxylic acid composite water-reducing agent.
Embodiment 4
Step 1: preparing A material: using 2.87 parts of methylpropene sodium sulfonates of deionized water dissolving, after stirring and dissolving, be added
13.09 parts of acrylic acid, stir evenly spare；
Step 2: preparing B material: using 0.55 part of mercaptopropionic acid of deionized water dissolving；
Step 3: dissolved 95 parts of isoamyl alcohol polyoxyethylene ethers that molecular weight is 3800 with deionized water, it is rear to be added
1.11 parts of ammonium persulfates, are warming up to 60 ± 2 DEG C, at the uniform velocity dropwise addition A, B material, and A expects that time for adding is 1.5h, and B expects that time for adding is 2h；
Step 4: constant temperature 2.5h, obtains poly carboxylic acid series water reducer.
Step 5: take 48 parts of the poly carboxylic acid series water reducer (concentration 40%) of above-mentioned preparation, then under stirring according to
55 parts of water of secondary addition, 5 parts of triethanolamines, 25 parts of magnesium rhodanates, 15 parts of calcium formates, sufficiently dissolution stand to get the poly- carboxylic of early-strength
Sour composite water-reducing agent.
Application effect of the invention is described in detail below with reference to test.
The above-mentioned early-strength polycarboxylate composite water reducing agent that the present invention provides tests (GB/T8077- according to paste flowing degree
2000): using China Resources P.II42.5R cement, test flowing degree of net paste of cement, testing result such as table 1 according to GB/T8077-87；
Table 1: performance test results
Water-reducing rate and compressive strength rate test are carried out referring to " concrete admixture " (GB/T 8076-2008).
The above-mentioned early-strength polycarboxylate composite water reducing agent that the present invention provides, with QL-PC5 type high-performance water reducing agent (standard type)
Experimental Comparison result is as shown in table 2 below.
Table 2: concrete performance examination result
Note: concrete proportioning is as follows:
Cement: 330, sand: 780, stone 1-2:1070, additive: 6, water: 165, admixture dosage: 1.8%；Experimental enviroment:
22 DEG C of temperature, humidity 60%.
As above-mentioned test data analyzer it is found that early-strength polycarboxylate composite water reducing agent prepared by the present invention is in diminishing, guarantor
Collapse, workability etc. is relatively better than QL-PC5 type high-performance water reducing agent (standard type), and improve in terms of early strength it is significant, it is comprehensive
Conjunction advantage is fairly obvious.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
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| CN112592096A (en) * | 2020-12-30 | 2021-04-02 | 西部铁建工程材料科技有限公司 | Slow-release water reducing agent with early strength function and preparation method thereof |
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|---|---|---|---|---|
| CN101289292A (en) * | 2008-06-13 | 2008-10-22 | 北京工业大学 | Early-strength polycarboxylate high-performance water reducer and preparation method thereof |
| CN103772624A (en) * | 2014-01-10 | 2014-05-07 | 陕西科技大学 | Early-strength polycarboxylate concrete water-reducing agent and preparation method thereof |
| WO2016026346A1 (en) * | 2014-08-22 | 2016-02-25 | 科之杰新材料集团有限公司 | Low-temperature method for preparing high-adaptability ether polycarboxylic acid water reducer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289292A (en) * | 2008-06-13 | 2008-10-22 | 北京工业大学 | Early-strength polycarboxylate high-performance water reducer and preparation method thereof |
| CN103772624A (en) * | 2014-01-10 | 2014-05-07 | 陕西科技大学 | Early-strength polycarboxylate concrete water-reducing agent and preparation method thereof |
| WO2016026346A1 (en) * | 2014-08-22 | 2016-02-25 | 科之杰新材料集团有限公司 | Low-temperature method for preparing high-adaptability ether polycarboxylic acid water reducer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112592096A (en) * | 2020-12-30 | 2021-04-02 | 西部铁建工程材料科技有限公司 | Slow-release water reducing agent with early strength function and preparation method thereof |
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Application publication date: 20190607 |