CN103724567B - A kind of shrinkage type water reducer and synthetic method thereof - Google Patents
A kind of shrinkage type water reducer and synthetic method thereof Download PDFInfo
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- CN103724567B CN103724567B CN201310749205.5A CN201310749205A CN103724567B CN 103724567 B CN103724567 B CN 103724567B CN 201310749205 A CN201310749205 A CN 201310749205A CN 103724567 B CN103724567 B CN 103724567B
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Abstract
The invention discloses a kind of shrinkage type water reducer, be made up of a methoxy poly (ethylene glycol), b diethylene glycol monomethyl ether or diglycol monotertiary B ether or both mixtures, c n-methylolacrylamide, the acid of d acrylic or methacrylic or both mixture, e ammonium persulphate or Potassium Persulphate, f Resorcinol, the g vitriol oil.Beneficial effect of the present invention is: shrinkage type water reducer of the present invention significantly reduces the ability of the interfacial tension of grout pore interior solution, thus reduction capillary pressure, affect moisture vaporator rate, and then more significantly reduce and significantly can reduce the dry shrinkage of cement mortar, be preferablyly applied to the concrete works that reducing and anti-cracking is had higher requirements.
Description
Technical field
The present invention relates to and relate to building trade water reducer, specifically a kind of shrinkage type water reducer and synthetic method thereof.
Background technology
High performance concrete (HPC) has the weather resistance of high strength, high workability and excellence.In the appearance of the simultaneous new problem of optimization HPC performance, one of wherein the severeest problem is exactly the aggravation of Plastic Shrinkage of Concrete cracking.So which kind of approach to reduce the own emphasis through becoming the research of current engineering circles of concrete contraction by.
Normal employing adds the drying shrinkage that cement expansive material carrys out compensating concrete both at home and abroad.The volume of swelling agent generally accounts for the 6%-15% of binder total amount, and volume is large and must carry out enough moisture-keeping maintainings to concrete.Economization agent for concrete reduces concrete contraction, to reach the object reducing distress in concrete by the surface tension of water in reduction concrete pore, the convergent force of minimizing moisture evaporative process.But economization agent exists affects concrete strength and expensive problem.
Summary of the invention
The object of this invention is to provide a kind of shrinkage type water reducer and synthetic method thereof, plastic shrinkage is little, and resistance to cleavage is good.
Technical scheme of the present invention is achieved in that to be made up of following raw material:
A methoxy poly (ethylene glycol)
B diethylene glycol monomethyl ether or diglycol monotertiary B ether or both mixtures
C n-methylolacrylamide
The acid of d acrylic or methacrylic or both mixtures
E ammonium persulphate or Potassium Persulphate
F Resorcinol
The g vitriol oil
The mol ratio of its raw material is: a:b:c:d=1:0.1 ~ 0.2:0.05 ~ 0.1:3 ~ 4, and 0.05 ~ 0.1%, g consumption of f consumption to be 0.04 ~ 0.06%, e consumption of total weight of material be total weight of material is total weight of material 0.5 ~ 0.8%.
The preferred molar ratio a:b:c:d=1:0.1:0.05:3 of raw material.
The synthetic method of shrinkage type water reducer, its step is as follows: 1) a, b, c, d are added reactor successively, stirs and heats up, when mixing of materials evenly after f, g are added successively, and continue to be warming up to 120 degree and react 8 hours, obtain esterification products; 2) temperature of charge is down to 60 degree, and thin up reactant, keep 60 degree; 3) being dissolved in water by e to make and drip material A, evenly drip to reactor, point within 4 hours, to add, add rear continuation stirring 1 hour, is 6-7 by appropriate liquid caustic soda neutralization reactant to PH.
Constantly moisture in reactor is removed by vacuumizing in reaction process in described step 1).
The concentration of described dropping liquid A is 5 ~ 10% massfractions.
Beneficial effect of the present invention is: shrinkage type water reducer of the present invention significantly reduces the ability of the interfacial tension of grout pore interior solution, thus reduction capillary pressure, affect moisture vaporator rate, and then more significantly reduce and significantly can reduce the dry shrinkage of cement mortar, be preferablyly applied to the concrete works that reducing and anti-cracking is had higher requirements.
Embodiment
Below in conjunction with specific embodiment, explanation is further explained to the present invention.
Embodiment 1
The composition of raw material and proportioning thereof:
A methoxy poly (ethylene glycol)
B diethylene glycol monomethyl ether
C n-methylolacrylamide
D vinylformic acid
E ammonium persulphate
F Resorcinol
The g vitriol oil
The mol ratio of its raw material is: 0.05%, g consumption of a:b:c:d==1:0.1:0.05:3, f consumption to be 0.05%, e consumption of total weight of material be total weight of material is total weight of material 0.5%.
The synthetic method of shrinkage type water reducer, its step is as follows: 1) by a, b, c, d add reactor successively, stir and heat up, when mixing of materials evenly after f, g are added successively, and continue to be warming up to 120 degree and react 8 hours, obtain esterification products, constantly by vacuumizing moisture in removing reactor in reaction process; 2) temperature of charge is down to 60 degree, and thin up reactant, keep 60 degree; 3) being dissolved in water by e to make and drip material A, evenly drip to reactor, point within 4 hours, to add, add rear continuation stirring 1 hour, is 6-7 by appropriate liquid caustic soda neutralization reactant to PH.
Embodiment 2
The composition of raw material and proportioning thereof are:
A methoxy poly (ethylene glycol)
B diglycol monotertiary B ether
C n-methylolacrylamide
D methacrylic acid
E Potassium Persulphate
F Resorcinol
The g vitriol oil
The mol ratio of its raw material is: 0.1%, g consumption of a:b:c:d=1:0.2:0.1:4, f consumption to be 0.04%, e consumption of total weight of material be total weight of material is total weight of material 0.8%.
Its synthetic method is with embodiment 1.
Embodiment 3
A methoxy poly (ethylene glycol)
B diethylene glycol monomethyl ether and diglycol monotertiary B ether
C n-methylolacrylamide
D vinylformic acid and methacrylic acid
E ammonium persulphate and Potassium Persulphate
F Resorcinol
The g vitriol oil
The mol ratio of its raw material is: 0.06%, g consumption of a:b:c:d=1:0.15:0.08:3.5, f consumption to be 0.06%, e consumption of total weight of material be total weight of material is total weight of material 0.6%.
Its synthetic method is with embodiment 1.
Synthesize 40% polycarboxylate water-reducer as stated above, with proportioning comparison and detection, following table be the results are shown in this sintetics and market polycarboxylate water-reducer.
| Product | Volume % | Shrinkage ratio % | 28d intensity Mpa | Seepage-resistant grade |
| Common polycarboxylate water-reducer | 0.4 | 108 | 32.6 | P8 |
| Embodiment 1 | 0.4 | 95 | 34.8 | P10 |
| Embodiment 2 | 0.4 | 97 | 34.4 | P10 |
| Embodiment 3 | 0.4 | 98 | 35.1 | P10 |
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (4)
1. a shrinkage type water reducer, is characterized in that, is made up of following raw material:
A methoxy poly (ethylene glycol)
B diethylene glycol monomethyl ether or diglycol monotertiary B ether or both mixtures
C n-methylolacrylamide
The acid of d acrylic or methacrylic or both mixtures
E ammonium persulphate or Potassium Persulphate or both mixtures
F Resorcinol
The g vitriol oil
The mol ratio of its raw material is: a:b:c:d=1:0.1 ~ 0.2:0.05 ~ 0.1:3 ~ 4, and 0.05 ~ 0.1%, g consumption of f consumption to be 0.04 ~ 0.06%, e consumption of total weight of material be total weight of material is total weight of material 0.5 ~ 0.8%; Its synthetic method is: 1) a, b, c, d are added reactor successively, stirs and heats up, when mixing of materials evenly after f, g are added successively, and continue to be warming up to 120 degree and react 8 hours, obtain esterification products; 2) temperature of charge is down to 60 degree, and thin up reactant, keep 60 degree; 3) being dissolved in water by e to make and drip material A, evenly drip to reactor, point within 4 hours, to add, add rear continuation stirring 1 hour, is 6-7 by appropriate liquid caustic soda neutralization reactant to pH.
2. shrinkage type water reducer according to claim 1, is characterized in that, the mol ratio a:b:c:d=1:0.1:0.05:3 of raw material.
3. shrinkage type water reducer according to claim 1, is characterized in that, constantly by vacuumizing moisture in removing reactor in described step 1) reaction process.
4. shrinkage type water reducer according to claim 1, is characterized in that, the described concentration dripping material A is 5 ~ 10% massfractions.
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| CN201310749205.5A CN103724567B (en) | 2013-12-31 | 2013-12-31 | A kind of shrinkage type water reducer and synthetic method thereof |
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| CN201310749205.5A CN103724567B (en) | 2013-12-31 | 2013-12-31 | A kind of shrinkage type water reducer and synthetic method thereof |
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| CN103724567A CN103724567A (en) | 2014-04-16 |
| CN103724567B true CN103724567B (en) | 2015-11-18 |
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| CN110395934A (en) * | 2019-07-16 | 2019-11-01 | 江苏博思通新材料有限公司 | A kind of concrete shrinkage type water-reducing agent |
| CN114957559B (en) * | 2022-05-24 | 2023-09-15 | 佳化化学科技发展（上海）有限公司 | Amide water reducer and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875047A (en) * | 2012-10-17 | 2013-01-16 | 兰州大学 | Polycarboxylic high-efficiency water reducing agent and preparation method thereof |
| CN103450412A (en) * | 2013-09-16 | 2013-12-18 | 贵州科之杰新材料有限公司 | Preparation method of ester early-strength polycarboxylic acid water reducing agent |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875047A (en) * | 2012-10-17 | 2013-01-16 | 兰州大学 | Polycarboxylic high-efficiency water reducing agent and preparation method thereof |
| CN103450412A (en) * | 2013-09-16 | 2013-12-18 | 贵州科之杰新材料有限公司 | Preparation method of ester early-strength polycarboxylic acid water reducing agent |
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