CN106587706B - A kind of self-compaction high workability concrete polycarboxylate superplasticizer composition - Google Patents
A kind of self-compaction high workability concrete polycarboxylate superplasticizer composition Download PDFInfo
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- CN106587706B CN106587706B CN201611117472.0A CN201611117472A CN106587706B CN 106587706 B CN106587706 B CN 106587706B CN 201611117472 A CN201611117472 A CN 201611117472A CN 106587706 B CN106587706 B CN 106587706B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- 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
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2605—Macromolecular compounds 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
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/308—Slump-loss preventing agents
Abstract
The invention discloses a kind of self-compaction high workability concrete polycarboxylate superplasticizer compositions.The water-reducing agent composition gross mass is 100 parts, is made of the raw material by following mass parts：Middle acid ether is put 0.02 0.1 parts of type cement-based gelling material plastic expansion agent and is compounded than 35 50 parts of high-adaptability polycarboxylate superplasticizer mother liquor, low sour ether than low 20 35 parts of diminishing high collapse protection type polycarboxylate superplasticizer mother liquor, wide 15 30 parts of molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor, 0.025 0.1 parts of cement-based gelling material viscosity modifier, soluble Xu.The present invention provides a kind of self-compaction high workability concrete polycarboxylate superplasticizer composition, viscosity modifier and plastic expansion agent reduce water-reducing agent and protect thick dose of matching sensibility, in, low sour ether matches than water-reducing agent and high-adaptability type slump retaining agent, promote diminishing component sustained release, it is lasting, adaptable to protect plasticity.
Description
Technical field
The invention belongs to cement additive field, be adapted to house, road, bridge, in water conservancy structure a kind of microdilatancy without
Contraction, high intensity high-impermeable, no vibrated concrete.More particularly to a kind of self-compaction high workability concrete polycarboxylate water-reducer
Composition.
Background technology
With constantly bringing forth new ideas for Architectural Design, key project proposes concrete technology and construction method higher
It is required that.Self-compacting concrete the features such as oneself filling, Self-leveling, self-compaction, microdilatancy, increases oneself of building body structure design because of it
By spending.The workability and stability of self-compacting concrete are the key that realize self-compaction pouring construction, and water-reducing agent is mixed to self-compaction
Solidifying soil nature can have direct influence.
Self-compacting concrete additive can generally match thickener to be retained, be protected modeling in addition to common water-reducing agent.It is poly-
Prescribed molecular structure can be obtained by macromolecule autonomous Design principle and solution free radical polymerization technology in carboxylic acid water reducer product
Polycarboxylate water-reducer product, but since water-reducing agent functionalization index Design is partial to single, the guarantor of self-compacting concrete water-reducing agent
The high workabilities indexs such as water, guarantor are moulded, guarantor is collapsed are difficult to solve by one-component, therefore the water-reducing agent needs to match different functionization mother
Liquid and auxiliary small powder reach self-compacting concrete Functional Design.
105330193 A of CN disclose nuclear power ultra dense real concrete polycarboxylate water-reducer and preparation method thereof, the diminishing
Every 100 parts of agent includes following components and parts by weight content:Distributed ethers polycarboxylic acid water reducing agent 50-55 parts, collapse protection type ethers
20-25 parts of polycarboxylate water-reducer, 3-5 parts of retarder, 0.01-0.05 parts of antifoaming agent, 1-3 parts of water-retaining agent, 1-2 parts of economization agent,
0.1-0.3 parts of preservative, water is surplus；When preparation, the component is uniformly mixed by weight..
105293987 A of CN disclose a kind of Hydraulic Self Dense Concrete polycarboxylic-acid compounding water-reducing agent and its preparation
Methods and applications, wherein compounding water-reducing agent is grouped as by the group of following weight percentage:Diminishing component 50-80%；Guarantor is collapsed component
5-40%；Thickener component 1-10%；Slow setting component 1-20%；Bleed component 0.1- 2%.The present invention improves self-compacting concrete
Workability, mobility, anti-isolation and function of slump protection.
104829159 A of CN disclose a kind of CRTS type IIIs plate self-compacting concrete special slow release controllable type polycarboxylic acids
The preparation method of water-reducing agent, by high water reducing type polycarboxylate superplasticizer mother liquor, 1 type sustained-release polycarboxylic water reducer mother liquor, 2 types
Sustained-release polycarboxylic water reducer mother liquor, 3 type sustained-release polycarboxylic water reducer mother liquors, Controlled release agent, retarder, liquid phase concrete
Thixotropic agent, foam stabilizer, antifoaming agent and air entraining agent compound.The present invention provides a kind of special water-reducing agent of self-compacting concrete,
It reduces concrete water amount sensibility, increase system stability, reduce thixotroping variation, while there is water-reducing rate
High, volume is low and the technical advantages such as cement type is adaptable.
Invention content
Technical problem to be solved by the present invention lies in provide a kind of self-compaction high workability concrete polycarboxylic acids diminishing
Agent composition.
The polycarboxylate water-reducer molecule amount multizone range that the present invention is built has different time in cement hydration process
The diminishing agent molecule of section is anchored at cement granules and hydrated product surface, it is ensured that the function of slump protection of water-reducing agent has different molecular structures
Diminishing agent molecule continuity supplement；The use of viscosity modifier is different from general thickener, more advocates peace certainly in viscosity control
Controllably；Soluble plastic expansion agent auxiliary water-reducing agent, which protect, to collapse, and largely reduces after concreting is stood and settle
Bleeding effect, and reasonable compensation is shunk.
A kind of self-compaction high workability concrete polycarboxylate superplasticizer composition, gross mass part is 100, by following weight
The raw material compounding composition of part：
Middle acid ether is than high-adaptability polycarboxylate superplasticizer mother liquor：35 ~ 50 parts；
Low acid ether is than low diminishing high collapse protection type polycarboxylate superplasticizer mother liquor：20 ~ 35 parts；
Wide molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor：15 ~ 30 parts；
Cement-based gelling material viscosity modifier：0.025 ~ 0.1 part；
Soluble Xu puts type cement-based gelling material plastic expansion agent：0.02 ~ 0.1 part；
Each mother liquor mass percent is 40%, and the middle sour ether is than high-adaptability polycarboxylate superplasticizer mother liquor, under
It states each component to be polymerized, raw material gross mass is 1000 parts, and each component includes：
Polyether macromonomer：345~355；
Acrylic acid：40.0~45.0；
Chain-transferring agent：1.63~2.10；
Hydrogen peroxide：3.0~5.0；
Victoria C：0.80~0.95；
Liquid caustic soda：10~20；
Water：Remaining.
The middle sour ether is than high-adaptability polycarboxylate superplasticizer mother liquor, as a preferred embodiment, the polyether macromonomer is first
One or more of compositions of base allyl polyethenoxy ether, isoamyl alcohol polyoxyethylene ether, isobutene alcohol polyoxyethylene ether；It is described
Polyether macromonomer is preferably 350 ~ 355；The acrylic acid dosage is preferably 40.0 ~ 42.5；The chain-transferring agent is sulfydryl
It is one or two kinds of in acetic acid, mercaptopropionic acid；The chain-transferring agent is preferably thioacetic acid, and dosage is 1.63 ~ 1.90.It is described double
Oxygen water is 27.5wt% industrial grade hydrogen peroxides.The liquid caustic soda is the technical grade NaOH solution of mass percent 30 ~ 32%.
The low sour ether is polymerized than low diminishing high collapse protection type polycarboxylate superplasticizer mother liquor by following each components, raw material
Gross mass is 1000 parts, and each component includes：
Polyether macromonomer：360~375；
Acrylic acid：22.0~35.0；
Chain-transferring agent：1.25~1.80；
Hydrogen peroxide：2.0~3.5；
Victoria C：0.55~0.75；
Liquid caustic soda：10~15；
Water：Remaining.
The low sour ether is than low diminishing high collapse protection type polycarboxylate superplasticizer mother liquor, as a preferred embodiment, the big list of the polyethers
Body is preferably 360 ~ 365；The acrylic acid dosage is preferably 28.5 ~ 35.0；The chain-transferring agent is thioacetic acid, dosage
It is 1.25 ~ 1.65.
The polyether macromonomer is methyl allyl polyoxyethylene ether, isoamyl alcohol polyoxyethylene ether, isobutene alcohol polyoxy
One or more of compositions of vinethene；The polyether macromonomer preferred mass ratio is 1：The isobutyl of 2 2000 and 2400 molecular weight
The composition of enol polyoxyethylene ether.The hydrogen peroxide is 27.5wt% industrial grade hydrogen peroxides.The liquid caustic soda is mass percent 30
~ 32% technical grade NaOH solution.
A kind of wide molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor, is polymerized by following each components,
Gross mass is 1000 parts, is as follows：
1) 325 ~ 335 parts of polyether macromonomers and 200 ~ 250 parts of water are added in reaction kettle, it is lasting to stir, until solution
Without obvious bulk or sheet material；Temperature in the kettle is controlled at 5 ~ 25 DEG C, disposably puts into 2.0 ~ 5.0 parts of hydrogen peroxide and 2.1 ~ 4.5
Part sulphonic acids minor comonomer；
2) hydrogen peroxide is added in 10min, starts that initiator, minor comonomer solution is added dropwise successively；Initiator is by 5.0 ~ 10.0 parts
Organic weak reductant and 100 ~ 120 parts of water compositions；Minor comonomer solution by 4.9 ~ 10.5 parts of sulphonic acids minor comonomers, 5.0 ~ 10.0 parts
Fumaric acid, 30.0 ~ 45.0 parts of acrylic ester monomers and 60 ~ 90 parts of water compositions；Initiator time for adding is more than minor comonomer solution
0.5 hour；
During minor comonomer solution is added dropwise, the minor comonomer amount of solution of half, intermediate 1/3 time is added in preceding 1/3 time
The minor comonomer amount of solution of one third is added, 1/6th minor comonomer amount of solution is added in rear 1/3 time；
3) after completion of dropwise addition, 1 ~ 2h is cured, when reaction solution temperature is less than 30 DEG C, 6 ~ 10 parts of liquid caustic soda is added, moisturizing is stirred
10 ~ 15h is stood after mixing uniformly.
The isoamyl alcohol polyoxyethylene ether of the polyether macromonomer preferably 3000 molecular weight.
A kind of wide molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor, the small list of sulphonic acids described in preparation process
Body is sodium vinyl sulfonate, the one or more of of Sodium Allyl Sulfonate form；The organic weak reductant be Dextrose Monohydrate,
One or two kinds of compositions of fructose；The acrylic ester monomer is hydroxy-ethyl acrylate, hydroxypropyl acrylate, acrylic acid first
One or more of compositions of ester, ethyl acrylate, methyl methacrylate；The minor comonomer solution time for adding is 4.0 ~ 5.0
h。
The hydrogen peroxide is that mass percent is 27.5% industrial grade hydrogen peroxide；The liquid caustic soda is mass percent 30 ~ 32%
Technical grade NaOH solution.
Middle sour ether diminishing high collapse protection type polycarboxylic acids diminishing lower than high-adaptability polycarboxylate water-reducer and low sour ether ratio
The preparation method of agent, process are as follows：
Polyether macromonomer is placed in reaction vessel, it is lasting to stir, until agitating solution is without obvious bulk or sheet material；
Hydrogen peroxide is added after dissolving in complete polyether macromonomer solution, initiator and small list are sequentially added in 10min
Liquid solution, the initiator are chain-transferring agent and Victoria C（Reducing agent）Water solution mixture, the minor comonomer solution be third
The aqueous solution of olefin(e) acid；Minor comonomer solution time for adding is 3 ~ 4h, and initiator drips after lagging behind 10 ~ 20min of minor comonomer solution；
Cooling water circulation is not opened, 1 ~ 2h of reaction in reaction kettle is placed in, then cool down 10 ~ 15h automatically, liquid caustic soda is added, and mend
Water stirs evenly.
The cement-based gelling material viscosity modifier is solid-liquid combination object, and gross mass is 100 parts, containing following heavy
Measure the raw material of part：
Salt intercalator：65 ~ 75 parts；
Organic intercalation agent：10 ~ 20 parts；
Cationic monomer：10 ~ 20 parts；
Alkyl phenol polyoxyethylene ether：5 ~ 15 parts.
It is 1 that the salt intercalator, which is mass ratio,：1 sodium nitrate and the mixture of sodium sulphate；The organic intercalator
Preferably one or two kinds of compositions of the polyethylene glycol of molecular weight 400 ~ 1000, polypropylene glycol；The cationic monomer is
Acryloyloxyethyl trimethyl ammonium chloride, n,N-Dimethylformamide, n,N-dimethylacetamide, one kind of erucyl amide or
Several compositions；The alkyl phenol polyoxyethylene ether is one or two kinds of groups of OP-10, NP-10 type nonylphenol polyoxyethylene ether
Close object.
It is N, five methine four of N '-dinitrosos that soluble Xu, which puts type cement-based gelling material with plastic expansion agent,
Amine.
The beneficial effects of the invention are as follows：
Sour ether is than the middle sour ether ratio of high-adaptability polycarboxylate water-reducer and high branch density design theory, molecule ruler in 1.
It is very little to become larger, assist water-reducing agent molecular backbone length constraint diminishing agent molecule first under strong adsorbate hydrated environment to a certain extent
Beginning adsorbance reduces isolation bleeding probability；Low acid ether than low diminishing high collapse protection type polycarboxylate water-reducer low sour ether than design and
High branch density design, the polycarboxylic acids mother liquor show the feature that initial water-reducing rate is relatively low, and later stage water-reducing rate gradually amplifies.
2. wide molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent backbone length otherness is in the reasonable scope；Propylene
Esters of gallic acid monomeric polycarboxylicization designs, and is matched with the ester based monomer of different hydrolysis time points, to meet different hydrated environments and medium
Under absorption-peptizaiton；High-performance viscosity modifier disperses early-strength mineral using cationic monomer, excites its aquation, increases
Big viscosity, then be aided with salt, organic species intercalator is filled processing to stratiform hydrated product, reduce to diminishing agent molecule
Sticking probability, to ensure the mobility of mixture.
Specific implementation mode
Below by example, the present invention will be further elaborated, and following the description is not right only for explaining the present invention
Content is defined.
Embodiment 1,
Sour ether is polymerized than high-adaptability polycarboxylate water-reducer masterbatch by following each components in one kind, raw material gross mass
It is 1000, each component and technological parameter are as follows：
Bottom material：The isobutene alcohol polyoxyethylene ether of 2000 molecular weight：The isobutene alcohol polyoxy second of 116.7,2400 molecular weight
Alkene ether：233.3, water：250；
Hydrogen peroxide solution：27.5wt% industrial grade hydrogen peroxides：5.0, water：20；
After hydrogen peroxide is added initiator, minor comonomer solution are sequentially added in 10min；
Initiator：Thioacetic acid：1.85 Victoria C：0.88, water：120；
Minor comonomer solution：Acrylic acid：42.4 water：50；
Initiator time for adding：3.5h；
Minor comonomer solution time for adding 3.0h；
Soaking time：2h；
Liquid caustic soda：10
Moisturizing：149.87.
A kind of low sour ether than low diminishing high collapse protection type polycarboxylate water-reducer masterbatch, the water-reducing agent polymerize by following each components and
At raw material gross mass is 1000, and each component and technological parameter are as follows：
Bottom material：The isobutene alcohol polyoxyethylene ether of 2000 molecular weight：The isobutene alcohol polyoxyethylene of 123,2400 molecular weight
Ether：246, water：250；
Hydrogen peroxide solution：27.5wt% industrial grade hydrogen peroxides：3.3, water：12；
After hydrogen peroxide is added initiator, minor comonomer solution are sequentially added in 10min；
Initiator：Mercaptopropionic acid：1.55 Victoria C：0.58, water：120；
Minor comonomer solution：Acrylic acid：28.7 water：50；
Initiator time for adding：2.2h；
Minor comonomer solution time for adding 1.8h；
Soaking time：2h；
Liquid caustic soda：10；
Moisturizing：155.77.
A kind of width molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor, the water-reducing agent polymerize by following each components and
At raw material gross mass is 1000, and each component and technological parameter are as follows：
Bottom material：The isoamyl alcohol polyoxyethylene ether of 3000 molecular weight：327, water：235；
Hydrogen peroxide solution：27.5wt% industrial grade hydrogen peroxides：4.2, water：10；
Sodium vinyl sulfonate：3.0；
It is molten that initiator, minor comonomer are sequentially added after hydrogen peroxide solution and sodium vinyl sulfonate are added at one time, in 10min
Liquid；
Initiator：Dextrose Monohydrate：8.6, water：110；
Minor comonomer solution：Sodium vinyl sulfonate：7.0, fumaric acid：10.0 hydroxy-ethyl acrylate：15.7, acrylic acid hydroxypropyl
Ester：15.5 methyl methacrylate：8.2, water：70；
Initiator time for adding：5.0h；
Minor comonomer solution time for adding 4.5h；
The minor comonomer amount of solution of half is added in preceding 1/3 period, in 1/3 time be added one third minor comonomer it is molten
/ 6th minor comonomer amount of solution is added in liquid measure, rear 1/3 period；
Initiator solution is at the uniform velocity added dropwise；
Soaking time：2.0h；
When reaction solution temperature is less than 30 degree, it is slowly added to liquid caustic soda 8, moisturizing 167.8；
12h is stood after stirring evenly to get finished product.
A kind of cement-based gelling material viscosity modifier, the viscosity modifier are solid-liquid combination object, solid-liquid combination object
Gross mass is 100 parts, and the solid-liquid combination object contains the raw material of following weight parts：
Salt intercalator selection sodium nitrate and sodium sulphate, specific dosage are：
Sodium nitrate：32.5 parts, sodium sulphate：32.5 parts；
The polyethylene glycol of organic intercalator selection molecular weight 400, specific dosage are：
400 polyethylene glycol of molecular weight：10 parts；
Cationic monomer selection acryloyloxyethyl trimethyl ammonium chloride, specific dosage are：
Acryloyloxyethyl trimethyl ammonium chloride：12 parts；
Alkyl phenol polyoxyethylene ether selection OP-10 type nonylphenol polyoxyethylene ether, specific dosage are：
OP-10 type nonylphenol polyoxyethylene ether：13 parts.
It is N, N '-dinitrosopentamethlyene tetramines that soluble Xu, which puts type cement-based gelling material with plastic expansion agent,.
Embodiment 2
A kind of self-compacting concrete polycarboxylate superplasticizer composition, is compounded by following raw materials, and gross mass part is
100, the raw material containing following weight parts：
Middle acid ether is than high-adaptability polycarboxylate superplasticizer mother liquor：35 parts；
Low acid ether is than low diminishing high collapse protection type polycarboxylate superplasticizer mother liquor：35 parts；
Wide molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor：29.92 parts；
Cement-based gelling material high-performance viscosity modifier：0.03 part；
Soluble Xu puts type cement-based gelling material plastic expansion agent：0.05 part.
Embodiment 3
A kind of self-compaction high workability concrete polycarboxylate superplasticizer composition, is compounded by following raw materials, total matter
It is 100 to measure part, the raw material containing following weight parts：
Middle acid ether is than high-adaptability polycarboxylate superplasticizer mother liquor：49.9 parts；
Low acid ether is than low diminishing high collapse protection type polycarboxylate superplasticizer mother liquor：30 parts；
Wide molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor：20 parts；
Cement-based gelling material high-performance viscosity modifier：0.08 part；
Soluble Xu puts type cement-based gelling material plastic expansion agent：0.02 part.
Embodiment 4
A kind of self-compaction high workability concrete polycarboxylate superplasticizer composition, is compounded by following raw materials, total matter
It is 100 to measure part, and the masterbatch contains the raw material of following weight parts：
Middle acid ether is than high-adaptability polycarboxylate superplasticizer mother liquor：42.5 parts；
Low acid ether is than low diminishing high collapse protection type polycarboxylate superplasticizer mother liquor：27.5 parts；
Wide molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor：29.85 parts；
Cement-based gelling material high-performance viscosity modifier：0.06 part；
Soluble Xu puts type cement-based gelling material plastic expansion agent：0.09 part.
By the self-compaction high workability concrete polycarboxylate superplasticizer mother liquor of embodiment 2,3,4 and common polycarboxylic acids diminishing
At 10% concentration water-reducing agent, the concrete tested respectively under same volume different type water-reducing agent effect initially collapses agent mother liquor
Degree of falling/divergence and through when the indexs such as the slump/divergence, bleeding rate, intensity.Experiment cement used is new 42.5 Pu Guishui of China
Mud, with reference to GB/8076-2008《Concrete admixture》Testing standard.
According to indexs such as mobility data, bleeding rate, intensity, self-compaction high workability concrete polycarboxylic acids can be observed
The mobility of water-reducing agent tends to the conservation degree of high fluidity and high fluidity, and water-retaining property and cohesiveness are good, and bleeding rate is low, the height
After workability state ensures that the self-compacting concrete pours, it is not easy isolation sedimentation and is layered, therefore the self-compaction high workability concrete
With polycarboxylate water-reducer to the guaranteed effect of the development of concrete strength homogenieity, 28d intensity is better than ordinary water-reducing agent.
Different water-reducing agents influence concrete performance
| Water-reducing agent type | Initial slump/divergence mm | The 1h slumps/divergence mm | Initial bleeding rate % | 28d intensity MPa |
| Ordinary water-reducing agent | 190/570 | 165/485 | 2.1 | 42.3 |
| Embodiment 2 | 200/560 | 180/530 | 0.4 | 45.2 |
| Embodiment 3 | 205/555 | 190/550 | 0.3 | 44.8 |
| Embodiment 4 | 200/550 | 180/545 | 0.3 | 45.6 |
Claims (5)
1. a kind of self-compaction high workability concrete polycarboxylate superplasticizer composition, gross mass part is 100, by following weight parts
Raw material compounding composition：
Middle acid ether is than high-adaptability polycarboxylate superplasticizer mother liquor：35 ~ 50 parts；
Low acid ether is than low diminishing high collapse protection type polycarboxylate superplasticizer mother liquor：20 ~ 35 parts；
Wide molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor：15 ~ 30 parts；
Cement-based gelling material viscosity modifier：0.025 ~ 0.1 part；
Soluble Xu puts type cement-based gelling material plastic expansion agent：0.02 ~ 0.1 part；
Each mother liquor mass percent is 40%, and the middle sour ether is than high-adaptability polycarboxylate superplasticizer mother liquor, for by following each
Component is polymerized, and raw material gross mass is 1000 parts, and each component includes：
Polyether macromonomer：345~355；
Acrylic acid：40.0~45.0；
Chain-transferring agent：1.63~2.10；
Hydrogen peroxide：3.0~5.0；
Victoria C：0.80~0.95；
Liquid caustic soda：10~20；
Water：Remaining；
The low sour ether is polymerized than low diminishing high collapse protection type polycarboxylate superplasticizer mother liquor by following each components, the total matter of raw material
Amount is 1000 parts, and each component includes：
Polyether macromonomer：360~375；
Acrylic acid：22.0~35.0；
Chain-transferring agent：1.25~1.80；
Hydrogen peroxide：2.0~3.5；
Victoria C：0.55~0.75；
Liquid caustic soda：10~15；
Water：Remaining；
A kind of wide molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor, is polymerized by following each components, total matter
Amount is 1000 parts, is as follows：
1) 325 ~ 335 parts of polyether macromonomers and 200 ~ 250 parts of water are added in reaction kettle, it is lasting to stir, until solution is without bright
Aobvious blocky or sheet material；Temperature in the kettle is controlled at 5 ~ 25 DEG C, disposably puts into 2.0 ~ 5.0 parts of hydrogen peroxide and 2.1 ~ 4.5 parts of sulphurs
Acids minor comonomer；
2) hydrogen peroxide is added in 10min, starts that initiator, minor comonomer solution is added dropwise successively；Initiator is organic by 5.0 ~ 10.0 parts
Class weak reductant and 100 ~ 120 parts of water compositions；Minor comonomer solution is by 4.9 ~ 10.5 parts of sulphonic acids minor comonomers, 5.0 ~ 10.0 parts of rich horses
Acid, 30.0 ~ 45.0 parts of acrylic ester monomers and 60 ~ 90 parts of water compositions；Initiator time for adding is 0.5 small more than minor comonomer solution
When；
During minor comonomer solution is added dropwise, the minor comonomer amount of solution of half is added in preceding 1/3 time, and intermediate 1/3 time is added
/ 6th minor comonomer amount of solution is added in the minor comonomer amount of solution of one third, rear 1/3 time；
3) after completion of dropwise addition, 1 ~ 2h is cured, when reaction solution temperature is less than 30 DEG C, 6 ~ 10 parts of liquid caustic soda is added, moisturizing stirring is equal
10 ~ 15h is stood after even；
The cement-based gelling material viscosity modifier is solid-liquid combination object, and gross mass is 100 parts, contains following weight parts
Raw material：
Salt intercalator：65 ~ 75 parts；
Organic intercalation agent：10 ~ 20 parts；
Cationic monomer：10 ~ 20 parts；
Alkyl phenol polyoxyethylene ether：5 ~ 15 parts；
It is N, N '-dinitrosopentamethlyene tetramines that soluble Xu, which puts type cement-based gelling material with plastic expansion agent,.
2. self-compaction high workability concrete polycarboxylate superplasticizer composition according to claim 1, which is characterized in that
The middle sour ether than in high-adaptability polycarboxylate superplasticizer mother liquor, the polyether macromonomer be methyl allyl polyoxyethylene ether,
One or more of compositions of isoamyl alcohol polyoxyethylene ether, isobutene alcohol polyoxyethylene ether；The chain-transferring agent is sulfydryl second
It is one or two kinds of in acid, mercaptopropionic acid；The hydrogen peroxide is 27.5wt% industrial grade hydrogen peroxides；The liquid caustic soda is mass percent
30 ~ 32% technical grade NaOH solution.
3. self-compaction high workability concrete polycarboxylate superplasticizer composition according to claim 1, which is characterized in that
The low sour ether is described double than in low diminishing high collapse protection type polycarboxylate superplasticizer mother liquor, the chain-transferring agent is thioacetic acid
Oxygen water is 27.5wt% industrial grade hydrogen peroxides, and the liquid caustic soda is the technical grade NaOH solution of mass percent 30 ~ 32%, the polyethers
Polymeric monomer is methyl allyl polyoxyethylene ether, isoamyl alcohol polyoxyethylene ether, one kind or several of isobutene alcohol polyoxyethylene ether
Kind composition.
4. self-compaction high workability concrete polycarboxylate superplasticizer composition according to claim 1, which is characterized in that
The preparation process of the width molecular weight distribution high-adaptability type polycarboxylic acid slump retaining agent mother liquor, the polyether macromonomer are 3000 molecules
The isoamyl alcohol polyoxyethylene ether of amount, the sulphonic acids minor comonomer be sodium vinyl sulfonate, Sodium Allyl Sulfonate one kind or several
Kind composition；The organic weak reductant is one or two kinds of compositions of Dextrose Monohydrate, fructose；The acrylic ester monomer
For the one or more of hydroxy-ethyl acrylate, hydroxypropyl acrylate, methyl acrylate, ethyl acrylate, methyl methacrylate
Composition；The hydrogen peroxide is that mass percent is 27.5% industrial grade hydrogen peroxide；The liquid caustic soda is the work of mass percent 30 ~ 32%
Industry grade NaOH solution.
5. self-compaction high workability concrete polycarboxylate superplasticizer composition according to claim 1, which is characterized in that
In the cement-based gelling material viscosity modifier, it is 1 that the salt intercalator, which is mass ratio,：1 sodium nitrate and sodium sulphate
Mixture；The organic intercalator is one or two kinds of combinations of the polyethylene glycol of molecular weight 400 ~ 1000, polypropylene glycol
Object；The cationic monomer is acryloyloxyethyl trimethyl ammonium chloride, n,N-Dimethylformamide, N, N- dimethyl second
The one or more combination object of amide, erucyl amide；The alkyl phenol polyoxyethylene ether is OP-10, NP-10 type polyoxyethylene nonyl phenyl
One or two kinds of compositions of vinethene.
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| CN107954631B (en) * | 2017-11-30 | 2020-06-16 | 湖北工业大学 | Polycarboxylate superplasticizer for pervious concrete and preparation method thereof |
| CN107964076A (en) * | 2017-12-22 | 2018-04-27 | 张海军 | A kind of high stability zero-emission polycarboxylate water-reducer and preparation method thereof |
| CN109293272A (en) * | 2018-10-18 | 2019-02-01 | 衢州学院 | A kind of concrete admixture and preparation method thereof |
| CN109734353A (en) * | 2019-01-28 | 2019-05-10 | 中水电第十一工程局（郑州）有限公司 | A kind of high-slump-retentionpolycarboxylate polycarboxylate water reducer |
| CN111234128A (en) * | 2020-01-09 | 2020-06-05 | 昆明承曜建材有限公司 | Efficient preparation method of polycarboxylate superplasticizer |
| CN112920341B (en) * | 2021-02-03 | 2023-06-02 | 湖北工业大学 | Low molecular weight polymer for viscosity-reducing concrete and preparation method thereof |
| CN113173731A (en) * | 2021-03-08 | 2021-07-27 | 云南能投缘达建设集团有限公司 | Concrete water reducing agent |
| CN113955975A (en) * | 2021-12-03 | 2022-01-21 | 砼牛（上海）智能科技有限公司 | Composite concrete water reducing agent |
| CN114105517B (en) * | 2021-12-09 | 2022-07-15 | 福州创先工程材料有限公司 | Polycarboxylic acid high-performance water reducing agent |
| CN114920526B (en) * | 2022-06-27 | 2022-11-15 | 河北定强新材料科技有限公司 | Environment-friendly anti-cracking low-shrinkage prestressed grouting material and preparation method thereof |
| CN115403297A (en) * | 2022-09-30 | 2022-11-29 | 深圳市五山新材料股份有限公司 | Polycarboxylate superplasticizer for improving workability |
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