CN107057003A - Self-curing type poly carboxylic acid series water reducer and preparation method thereof - Google Patents
Self-curing type poly carboxylic acid series water reducer and preparation method thereof Download PDFInfo
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- CN107057003A CN107057003A CN201710322367.9A CN201710322367A CN107057003A CN 107057003 A CN107057003 A CN 107057003A CN 201710322367 A CN201710322367 A CN 201710322367A CN 107057003 A CN107057003 A CN 107057003A
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- 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
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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
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2688—Copolymers containing at least three different monomers
- C04B24/2694—Copolymers containing at least three different monomers containing polyether side chains
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- 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
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
- C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0045—Polymers chosen for their physico-chemical characteristics
- C04B2103/0059—Graft (co-)polymers
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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
- 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
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- Polymers & Plastics (AREA)
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Abstract
The invention belongs to concrete additive technical field, and in particular to a kind of Self-curing type poly carboxylic acid series water reducer and preparation method thereof.Self-curing type poly carboxylic acid series water reducer is made up of polyether macromonomer, minor comonomer, regulation monomer methyl ricinolcic acid, grafted monomers hydroxyethylmethylcellulose sodium, crosslinking agent GDMA, chain-transferring agent, initiator and deionized water.The present invention by introducing hydroxyethylmethylcellulose sodium in the molecular structure, and crosslinked dose of GDMA carry out it is appropriately crosslinked after, can be swelled, the internal water required for hydrated cementitious can be effectively kept, with since conservation function.
Description
Technical field
The invention belongs to concrete additive technical field, and in particular to a kind of Self-curing type poly carboxylic acid series water reducer and its
Preparation method.
Background technology
Concrete is as a kind of artificial stone material, the features such as due to pouring property, convenient field fabrication, good economy performance
And be widely used, have become the basis of modern society.High-strength concrete be concrete development a direction, its with
The characteristics of in system is low water binder ratio.After cement and water generation hydration reaction, concrete can be sent out because of the reduction of moisture
Raw autogenous shrinkage, and general concrete contraction distortion is all limited, will produce tension inside it, concrete can be caused to produce
Crack so that the durability reduction of concrete.It then becomes necessary to take certain maintenance measure to control moisture evaporation, promote
The maximum aquation of cement.Conserve and the durability of concrete is had a major impact, if lacking appropriate maintenance measure, even if
Superior in quality concrete also can recurring structure deterioration and durability reduction.
The maintenance process of concrete is broadly divided into internal maintenance and outside two kinds of maintenance.Outside maintenance process is typically to mixed
Solidifying soil surface sprinkling, the wet straw bag of covering and the maintenance of plastic covering film etc., prevent the evaporation of moisture.But these maintenance processes not only take
During expenses of labour, and because High Strength Concrete Structures are closely knit, outside maintenance is hardly entered with water needed for inside concrete, hydrated cementitious
Moisture can not be supplemented, it is difficult to obtain preferable maintenance effect.In order to supplement the water source required for hydrated cementitious, generally will
Interior sealing compound is incorporated into concrete, so as at miniature " storage reservoir " of inside concrete formation retaining, then be born in pore
Discharge moisture to promote the continuation aquation of cement under pressure and moist gradient effect, and then suppress its self-constriction, enhance length
Phase durability and reduction maintenance cost.
Concrete inner curing agent is a kind of containing strongly hydrophilic groups such as carboxyl and hydroxyls, can occur water with water formation hydrogen bond
Cooperation is in gel with substantial amounts of aqueous water is absorbed rapidly.Generally, Free water be fixed on polymeric inner even in
It also is difficult to overflow under conditions of high pressure, but moisture can be discharged in the case where environmental pH or ion concentration are big.In cement water
In change system, the calcium ion generated with aquation is dissolved into water, and the pH value of system constantly rises, and promotes interior sealing compound constantly to release
Release moisture, it is ensured that the moisture required for hydrated cementitious, the early stage and later stage for reducing concrete shrink, and improve the resistance to of concrete
Long performance, prevents the intrusion of hazardous medium.
Poly carboxylic acid series water reducer is grown up after lignin sulfonic acid system ordinary water-reducing agent and naphthalene series high-efficiency water-reducing agent
Three generations's cement water reducing agent, with molecular structure designability is strong and the characteristics of big high performance potentiality.At present, polycarboxylic-acid subtracts
Aqua presents functionalization and the trend of seriation.By selecting the synthesis with difference in functionality functional group raw material and matching
Method can synthesize with diminishing, protect collapse, reduce, the poly carboxylic acid series water reducer of the function such as low entraining.
Application No. CN201610891047.0 patent selects acrylic acid, Lygodium japonicum, polyethyleneimine and polysorbate
Deng raw material, a kind of early-strength polycarboxylic acid water reducing agent is obtained by the processing such as ultrasound and centrifugation.
Chinese patent CN201410461242.0 patent describes one kind monomer A isopentene groups APEO, list
Body B acrylic acid, monomer C maleic anhydrides and monomer D methylallyl alcohol polybutylene oxypropylene groups ether synthesize a kind of low entraining decrement
Type polycarboxylate water-reducer, the product just has preferable diminishing under relatively low volume and reduces cement mortar and concrete shrinkage
Effect.
Chinese patent CN201610930001.5 patent describe the unsaturated APEO of one kind, unsaturated acids,
Beta-unsaturated esters, amide derivatives, crosslinking agent, commercially available anti-mud auxiliary agent and deionized water are prepared with a kind of collection diminishing, protect and collapse, resist
Mud and early powerful comprehensive polycarboxylate water-reducer.
Prior art can be by selecting the monomer of difference in functionality functional group to synthesize the polycarboxylic-acid with corresponding function type
Water reducer, but all it is not directed to the poly carboxylic acid series water reducer of Self-curing type function.
The content of the invention
It is an object of the invention to provide a kind of Self-curing type poly carboxylic acid series water reducer, by rational Molecular Design,
From the monomer of difference in functionality functional group so that product is in addition to preferable diminishing and model retention effect, also with Self-curing work(
Can, the problem of alleviating the concrete soil mechanics that especially high-grade concrete occurs by dehydration and poor endurance quality.
Self-curing type poly carboxylic acid series water reducer of the present invention is by polyether macromonomer, minor comonomer, regulation monomer castor-oil plant
Methyl oleate, grafted monomers hydroxyethylmethylcellulose sodium, crosslinking agent GDMA, chain-transferring agent, initiation
Agent and deionized water are made.
Described polyether macromonomer is isopentene group APEO (TPEG) or methyl allyl polyoxyethylene ether
(HPEG), molecular weight is 1000-3000.
Described minor comonomer is the mixture of acrylic acid and acrylamide, and the mol ratio of acrylamide and acrylic acid is 1:3-
6。
Described chain-transferring agent is sulfhydryl compound, and the consumption of chain-transferring agent is polyether macromonomer, minor comonomer, regulation monomer
With the 0.1-1.0% of grafted monomers gross weight.
Described initiator is persulfate or peroxide, and the consumption of initiator is polyether macromonomer, minor comonomer, regulation
The 0.5-2.5% of monomer and grafted monomers gross weight.
Described polyether macromonomer, minor comonomer, regulation monomer, the mol ratio of grafted monomers and crosslinking agent are 1：3-5：0.2-
0.5：0.1-0.2：0.05-0.1.
The preparation method of Self-curing type poly carboxylic acid series water reducer of the present invention, step is as follows：
(1) deionized water and grafted monomers hydroxyethylmethylcellulose sodium are first added into reactor, 50-80 is heated to
DEG C, obtain liquid on earth；
(2) by polyether macromonomer and deionized water wiring solution-forming A, by minor comonomer, regulation monomer methyl ricinolcic acid, crosslinking
Agent GDMA, chain-transferring agent and deionized water are configured to solution B, initiator and deionized water are made into molten
Liquid C；In the case where reaction temperature is 50-80 DEG C, solution A, B and C are instilled in the liquid of bottom simultaneously；
(3) after completion of dropping, at 50-80 DEG C, insulation reaction 1.0-2.0h is continued；
(4) normal temperature is down to, pH to 7-9 is adjusted with sodium hydroxide, and add deionized water that the total solid content of reaction system is dilute
20-30% is released, is produced.
The mass concentration of bottom liquid described in step (1) is 5-7%.
The mass concentration of solution A described in step (2) is 30-50%, and the mass concentration of solution B is 40-60%, solution
C mass concentration is 3-5%.
The instillation time of solution A described in step (2) is 4.0h, and the instillation time of solution B is 4.0h, the drop of solution C
The angle of incidence is 4.5h.
Solution A, B and C are instilled in the liquid of bottom simultaneously in step (2), wherein, solution A 4.0h is at the uniform velocity dripped off, solution B
4.0h is at the uniform velocity dripped off, and solution C 4.5h is at the uniform velocity dripped off.
The present invention takes the mode that polyether macromonomer solution, minor comonomer solution and initiator solution are added dropwise respectively, is conducive to
Synthesize the equilibrium of water reducer molecular structure；The polymerization activity of acrylic acid and acrylamide is larger, adds chain-transferring agent, to adjust certainly
By base reaction rate.
Pass through the graft copolymerization hydroxyethylmethylcellulose in the poly carboxylic acid series water reducer molecular structure with comb shaped structure
After sodium, and the crosslinking of crosslinked dose of GDMA progress appropriateness, the hydrating structure of polyhydroxy is generated, can be effective
Keep hydrated cementitious required for internal water, then slowly release moisture under the alkaline environment of concrete, make it have
Absorb water since conservation function.
The electrostatic repulsion that the space steric effect and carboxyl that polyether macromonomer side chain in diminishing agent molecule is produced are provided is made
With and amide groups hydrolysis slow releasing function so that diminishing agent molecule shows excellent diminishing and guarantor after being adsorbed by cement granules
Collapse performance.
Adjust the addition of monomer methyl ricinolcic acid so that poly carboxylic acid series water reducer molecule is with the same of hydrating structure
When, still with certain hydrophobicity, workability, physical mechanics property and the durability for keeping the concrete for adding water reducer excellent
Energy.
The present invention compared with prior art, has the advantages that：
(1) by introducing hydroxyethylmethylcellulose sodium, and crosslinked dose of dimethacrylate second two in the molecular structure
After alcohol ester progress is appropriately crosslinked, it can be swelled, the internal water required for hydrated cementitious can be effectively kept, with Self-curing work(
Energy.Acrylamide is hydrolyzed with slump-retaining energy in the basic conditions；Contain ehter bond in polyether macromonomer, in alkaline environment
There is down preferable stability.Methyl ricinolcic acid can increase the hydrophobicity of water reducer, have concrete preferably comprehensive
Energy.
(2) in polymerisation, the mode for taking polyether macromonomer solution, minor comonomer solution and initiator solution to be added dropwise, drop
Low manipulation strength, controllability is strong, and advantageously ensures that the quality of generation water reducer product.
Embodiment
The present invention is described further with reference to embodiments.
To simplify statement, isopentene group APEO is represented with TPEG below, HPEG represents methacrylic polyoxy second
Alkene ether；QYN represents hydroxyethylmethylcellulose sodium；BMZ represents methyl ricinolcic acid；ACAM represents acrylamide；AA represents third
Olefin(e) acid；RJZ represents GDMA.
Embodiment 1
TPEG molecular weight 1200, polymeric monomer TPEG：Minor comonomer ACAM and AA：Adjust monomer BMZ：Grafted monomers QYN：Crosslinking
Agent RJZ mol ratio is 1:3.5:0.2:0.1:0.05, wherein ACAM：AA mol ratio is 1:5, chain-transferring agent is sulfydryl second
Acid, its consumption is the 0.1% of polyether macromonomer, minor comonomer, regulation monomer and grafted monomers gross mass, and initiator is persulfuric acid
Potassium, its consumption be polyether macromonomer, minor comonomer, regulation monomer and grafted monomers gross mass 0.5%, be made into 3.0% it is water-soluble
Liquid.
QYN is added into reaction bulb, and adds deionized water and is made into the bottom liquid that concentration is 5%, stirring is opened, is warming up to 60
℃.TPEG adds deionized water to be made into 50% solution A, and AA, ACAM, BMZ, RJZ, chain-transferring agent and deionized water are made into 30%
Solution B, and initiator potassium persulfate solution C, while being added drop-wise in 60 DEG C of bottom liquid.Wherein, solution A 4.0h is at the uniform velocity dripped off, molten
Liquid B 4.0h are at the uniform velocity dripped off, and solution C 4.5h is at the uniform velocity dripped off.After solution C is added, continue to be incubated 1.5h at 60 DEG C.It is cooled to 30
Below DEG C, pH to 7-8 is adjusted with sodium hydroxide, adds water and adjusts to solid content 30%, as Self-curing type polycarboxylic-acid diminishing
Agent product S-1.
Embodiment 2
HPEG molecular weight 2400, polymeric monomer HPEG：Minor comonomer ACAM and AA：Adjust monomer BMZ：Grafted monomers QYN：Crosslinking
Agent RJZ mol ratio is 1:5:0.3:0.1:0.08, wherein ACAM：AA mol ratio is 1:4, chain-transferring agent is TGA,
Its consumption is the 0.5% of polyether macromonomer, minor comonomer, regulation monomer and grafted monomers gross mass, and initiator is potassium peroxydisulfate, its
Consumption is the 0.6% of polyether macromonomer, minor comonomer, regulation monomer and grafted monomers gross mass, is made into 3.0% aqueous solution.
QYN is added into reaction bulb, and adds deionized water and is made into the bottom liquid that concentration is 6%, stirring is opened, is warming up to 70
℃.TPEG adds deionized water to be made into 30% solution A, and AA, ACAM, BMZ, RJZ, chain-transferring agent and deionized water are made into 30%
Solution B and initiator potassium persulfate solution C, while being added drop-wise in 70 DEG C of bottom liquid.Wherein, solution A 4.0h is at the uniform velocity dripped off, molten
Liquid B 4.0h are at the uniform velocity dripped off, and solution C 4.5h is at the uniform velocity dripped off.After solution C is added, continue to be incubated 1.0h at 60 DEG C.It is cooled to 30
Below DEG C, pH to 7-8 is adjusted with sodium hydroxide, adds water and adjusts to solid content 30%, as Self-curing type polycarboxylic-acid diminishing
Agent product S-2.
Embodiment 3
HPEG molecular weight 3000, polymeric monomer HPEG：Minor comonomer ACAM and AA：Adjust monomer BMZ：Grafted monomers QYN：Crosslinking
Agent RJZ mol ratio is 1:4:0.4:0.1:0.1, wherein ACAM：AA mol ratio is 1:4, chain-transferring agent is mercaptopropionic acid, its
Consumption is the 0.2% of polyether macromonomer, minor comonomer, regulation monomer and grafted monomers gross mass, and initiator is ammonium persulfate, and it is used
Measure for polyether macromonomer, minor comonomer, regulation monomer and grafted monomers gross mass 1.0%, be made into 5.0% the aqueous solution.
QYN is added in reaction bulb, and adds deionized water and is made into the bottom liquid that concentration is 7%, stirring is opened, is warming up to
60℃.TPEG adds deionized water to be made into 40% solution A, and AA, ACAM, BMZ, RJZ, chain-transferring agent and deionized water are made into 35%
Solution B and initiator ammonium persulfate solution C, while being added drop-wise in 60 DEG C of bottom liquid.Wherein, solution A 4.0h is at the uniform velocity dripped off,
Solution B 4.0h is at the uniform velocity dripped off, and solution C 4.5h is at the uniform velocity dripped off.After solution C is added, continuation is incubated 1.0h at 60 DEG C.It is cooled to
Less than 30 DEG C, pH to 7-8 is adjusted with sodium hydroxide, adds water and adjusts to solid content 30%, as Self-curing type polycarboxylic-acid subtracts
Aqua product S-3.
Comparative example 1
TPEG molecular weight 2400, TPEG：AA：ACAM mol ratio is 1：2：1, initiator is hydrogen peroxide, and its consumption is
The 1.0% of monomer gross mass, be made into 3.0% the aqueous solution；Chain-transferring agent is TGA, and its consumption is monomer gross mass
0.3%.
TPEG2400 is added in reaction bulb, and adds deionized water and is made into the bottom liquid that concentration is 40%, stirring is opened,
It is warming up to 60 DEG C.By ACAM, AA, chain-transferring agent and a certain amount of water be made into 30% water solution A and initiator hydrogen peroxide it is molten
Liquid B, while being added drop-wise in 60 DEG C of bottom liquid, 4.0h is dripped off.A, B material are incubated 1.5h again after adding.Less than 30 DEG C are cooled to, hydrogen is used
Sodium oxide molybdena adjusts pH to 7-8, adds water and adjusts to solid content to 30% or so, that is, obtains contrast product C-1.
Comparative example 2
HPEG molecular weight 3000, HPEG：AA：ACAM mol ratios are 1：3：1, initiator is ammonium persulfate, and its consumption is single
The 0.7% of body gross mass, be made into 5.0% the aqueous solution；Chain-transferring agent is mercaptopropionic acid, and its consumption is monomer gross mass
0.2%.
Into reaction bulb, addition consumption is used as bottom water, opening stirring, liter for the deionized water of HPEG3000 gross masses 45%
Temperature is to 70 DEG C.The deionized water of the HPEG amounts of reordering is made into 40% water solution A, AA, ACAM, chain-transferring agent mercaptopropionic acid and one
Quantitative water is made into 35% aqueous solution B and initiator ammonium persulfate solution C, while being added drop-wise in 70 DEG C of bottom water.Wherein A expects
4.0h is at the uniform velocity dripped off, and B material 4.0h is at the uniform velocity dripped off, and C material 4.5h is at the uniform velocity dripped off.After C material are added, continuation is incubated 1.0h at 70 DEG C.
Less than 30 DEG C are cooled to, pH to 7-8 is adjusted with sodium hydroxide, adds water and adjusts to solid content 30%, that is, obtain contrast product C-
2。
Comparative example 3
HPEG molecular weight 2400, HPEG：AA：ACAM mol ratios are 1：4：1, initiator is potassium peroxydisulfate, and its consumption is single
The 1.5% of body gross mass, be made into 5.0% the aqueous solution；Chain-transferring agent is TGA, and its consumption is monomer gross mass
0.3%.
HPEG2400 is added in reaction bulb, a certain amount of deionized water is added and is made into the bottom liquid that concentration is 45%, will
ACAM, AA, chain-transferring agent and a certain amount of water are made into 50% water solution A and initiator potassium persulfate solution B, are added drop-wise to simultaneously
In 60 DEG C of bottom liquid, A material 3.5h is added, and B material 3.0h is dripped off.After A material are added, continuation is incubated 1.0h at 60 DEG C.It is cooled to 30
Below DEG C, pH to 7-8 is adjusted with sodium hydroxide, adds water and adjusts to solid content to 30% or so, that is, obtain contrast product C-3.
Implementation result
The using effect of above-mentioned 3 embodiments and 3 comparative examples is specifically described below：
From the cement of mountain aluminium board P.O 42.5；Sand is sand in IIth area, and modulus of fineness is 2.7, and clay content is 1.2%；Stone
Son uses particle diameter for nominal 5mm-20mm rubble, and using graduation two, wherein 5mm-10mm accounts for 30%, 10mm-20mm and accounts for 70%,
Meet continuous grading requirement；Miberal powder：S95 grades；Flyash：II grade；C50 concrete mixs are cement：Miberal powder：Flyash：Sand
Son：Stone：Water=370：60：60：670：1115：155.
Workability of concrete, 28d compression strength and cracking resistance are detected.The sample that 3 embodiments are obtained is in order
Numbering is S-1, S-2, S-3；It is C-1, C-2, C-3 that the sample that 3 comparative examples are obtained is numbered in order；Result of the test is shown in Table 1.
The embodiment 1-3 of table 1 and the detection of comparative example 1-3 properties of product
From table 1 it follows that compared with common poly carboxylic acid series water reducer C1-C3, using Self-curing type polycarboxylic-acid
Water reducer concrete water-reducing ratio is although low, but the slump-loss of product is smaller, and 28d compression strength is higher, and concrete cracking
Striped is few and area of cracks is also small, even without cracking.
Claims (10)
1. a kind of Self-curing type poly carboxylic acid series water reducer, it is characterised in that by polyether macromonomer, minor comonomer, regulation monomer castor oil
Sour methyl esters, grafted monomers hydroxyethylmethylcellulose sodium, crosslinking agent GDMA, chain-transferring agent, initiator
It is made with deionized water.
2. Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that described polyether macromonomer is
Isopentene group APEO or methyl allyl polyoxyethylene ether, molecular weight are 1000-3000.
3. Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that described minor comonomer is propylene
The mol ratio of the mixture of acid and acrylamide, acrylamide and acrylic acid is 1:3-6.
4. Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that described chain-transferring agent is mercapto
Based compound, the consumption of chain-transferring agent is the 0.1- of polyether macromonomer, minor comonomer, regulation monomer and grafted monomers gross weight
1.0%.
5. Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that described initiator is over cure
Hydrochlorate or peroxide, the consumption of initiator are the 0.5- of polyether macromonomer, minor comonomer, regulation monomer and grafted monomers gross weight
2.5%.
6. Self-curing type poly carboxylic acid series water reducer according to claim 1, it is characterised in that described polyether macromonomer, small
Monomer, regulation monomer, the mol ratio of grafted monomers and crosslinking agent are 1：3-5：0.2-0.5：0.1-0.2：0.05-0.1.
7. a kind of preparation method of any described Self-curing type poly carboxylic acid series water reducers of claim 1-6, it is characterised in that step
It is rapid as follows：
(1) deionized water and grafted monomers hydroxyethylmethylcellulose sodium are first added into reactor, 50-80 DEG C is heated to, obtains
Liquid on earth；
(2) by polyether macromonomer and deionized water wiring solution-forming A, by minor comonomer, regulation monomer methyl ricinolcic acid, crosslinking agent two
Methacrylic acid glycol ester, chain-transferring agent and deionized water are configured to solution B, by initiator and deionized water wiring solution-forming C；
In the case where reaction temperature is 50-80 DEG C, solution A, B and C are instilled in the liquid of bottom simultaneously；
(3) after completion of dropping, at 50-80 DEG C, insulation reaction 1.0-2.0h is continued；
(4) normal temperature is down to, pH to 7-9 is adjusted with sodium hydroxide, and add deionized water to be diluted to the total solid content of reaction system
20-30%, is produced.
8. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 7, it is characterised in that in step (1)
The mass concentration of described bottom liquid is 5-7%.
9. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 7, it is characterised in that in step (2)
The mass concentration of described solution A is 30-50%, and the mass concentration of solution B is 40-60%, and the mass concentration of solution C is 3-
5%.
10. the preparation method of Self-curing type poly carboxylic acid series water reducer according to claim 7, it is characterised in that step (2)
Described in instillation time of solution A be 4.0h, instillation time of solution B is 4.0h, and the instillation time of solution C is 4.5h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110372830A (en) * | 2019-07-25 | 2019-10-25 | 盐城工学院 | A kind of super plasticizer and preparation method thereof |
| CN112142363A (en) * | 2020-10-10 | 2020-12-29 | 杭州瑞鼎建材有限公司 | Automatic shrinkage compensation efflorescence resistant concrete |
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| CN102976657A (en) * | 2012-12-04 | 2013-03-20 | 山东宏艺科技股份有限公司 | Slushing agent for concrete and preparation method thereof |
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| CN105924590A (en) * | 2016-04-26 | 2016-09-07 | 陕西德盛新能源有限公司 | Preparation method of polycarboxylate concrete water reducer |
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| CN102976657A (en) * | 2012-12-04 | 2013-03-20 | 山东宏艺科技股份有限公司 | Slushing agent for concrete and preparation method thereof |
| CN105110687A (en) * | 2015-07-30 | 2015-12-02 | 厦门路桥翔通建材科技有限公司 | Mud resisting and slump retaining type polycarboxylic acids water reducer and preparation method thereof |
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| CN105924590A (en) * | 2016-04-26 | 2016-09-07 | 陕西德盛新能源有限公司 | Preparation method of polycarboxylate concrete water reducer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110372830A (en) * | 2019-07-25 | 2019-10-25 | 盐城工学院 | A kind of super plasticizer and preparation method thereof |
| CN110372830B (en) * | 2019-07-25 | 2021-12-31 | 盐城工学院 | Superplasticizer and preparation method thereof |
| CN112142363A (en) * | 2020-10-10 | 2020-12-29 | 杭州瑞鼎建材有限公司 | Automatic shrinkage compensation efflorescence resistant concrete |
| CN112142363B (en) * | 2020-10-10 | 2021-12-28 | 杭州瑞鼎建材有限公司 | Automatic shrinkage compensation efflorescence resistant concrete |
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