CN103724560B - A kind of superpower slump retaining agent and working method thereof - Google Patents
A kind of superpower slump retaining agent and working method thereof Download PDFInfo
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- CN103724560B CN103724560B CN201310749140.4A CN201310749140A CN103724560B CN 103724560 B CN103724560 B CN 103724560B CN 201310749140 A CN201310749140 A CN 201310749140A CN 103724560 B CN103724560 B CN 103724560B
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- retaining agent
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Abstract
The invention discloses a kind of superpower slump retaining agent, be made up of following raw material: a isopentenol polyoxyethylene ether, b vinylformic acid or methacrylic acid or both mixtures, c ethyl propenoate or propyl acrylate or both mixtures, d allyl methacrylate(AMA), e ammonium persulphate or Potassium Persulphate, f methylpropene sodium sulfonate, does is the mol ratio of its raw material: a:b:c:d:f=1?: (1.5 ~ 2.5)?: (1.5 ~ 2): (0.05 ~ 0.15)?: (0.3 ~ 0.6), the consumption of e is 0.5 ~ 1.0% of a, b and c gross weight.Slump retaining agent of the present invention not only initial water-reducing rate is not affected, and concrete slump rheological parameters' change with time amount is obviously improved, can ensure without slump-loss in 3h, the requirement of concrete-agitating transport, pumping, pouring technology process and high strength can be met completely, there is good workability.
Description
Technical field
The present invention relates to building trade admixture, specifically a kind of superpower slump retaining agent and working method thereof.
Background technology
The concrete admixture of current domestic use mainly contains naphthalene series high-efficiency water-reducing agent, melamine high-efficiency water-reducing agent, ligno-sulfate based plasticizer, sugared calcium class water reducer.The above two are used for preparing high-grade concrete, rear both due to water-reducing rate lower, be used for preparing low-grade concrete, the problem that the concrete ubiquity concrete slump loss of all these admixtures of use is too fast.
The loss of concrete slump is controlled at present: (1) mixes the method for high efficiency water reducing agent after adopting mainly through following method; (2) retardant is used; (3) C is used
3the cement that A content is low; (4) high efficiency water reducing agent early stage remaining quantity is in the liquid phase improved; (5) admixture high efficiency water reducing agent or use the high efficiency water reducing agent of different solubility repeatedly.
Although above mode makes slump-loss slow down to some extent, tackle the problem at its root not yet.
Summary of the invention
The invention provides a kind of superpower slump retaining agent and working method thereof, utilize cross-linking monomer and ester class minor comonomer copolymerization to have crosslinked branch and slowly-releasing diminishing dual function, reach superpower concrete slump hold facility.
Technical scheme of the present invention is achieved in that superpower slump retaining agent, is made up of following raw material:
A isopentenol polyoxyethylene ether
B vinylformic acid or methacrylic acid or both mixtures
C ethyl propenoate or propyl acrylate or both mixtures
D allyl methacrylate(AMA)
E ammonium persulphate or Potassium Persulphate
F methylpropene sodium sulfonate,
The mol ratio of its raw material is: a:b:c:d:f=1:(1.5 ~ 2.5): (1.5 ~ 2): (0.05 ~ 0.15): (0.3 ~ 0.6), the consumption of e is 0.5 ~ 1.0% of a, b and c gross weight.
The preferred molar ratio a:b:c:d:f=1:2:2:0.1:0.4 of raw material.
The synthetic method of superpower slump retaining agent, is made into dropping liquid A by soluble in water together to b, d, be made into dropping liquid B by soluble in water for e, water is added in reactor, then by a, c, f add reactor successively, and stirring is dissolved, and be warming up to 60-70 DEG C, dropping liquid A, B are started evenly drip in reactor simultaneously, all added with 3 ~ 4 hours, and continuing maintenance 60 ~ 70 DEG C 1 hour, reaction terminates.
The concentration of described dropping liquid A is 30 ~ 50% massfractions.
The concentration 5-10% massfraction of described dropping liquid B.
Beneficial effect of the present invention is: slump retaining agent of the present invention not only initial water-reducing rate is not affected, and concrete slump rheological parameters' change with time amount is obviously improved, can ensure without slump-loss in 3h, the complete requirement that can meet concrete-agitating transport, pumping, pouring technology process and high strength, has good workability.
Embodiment
Below in conjunction with specific embodiment, explanation is further explained to the present invention.
Embodiment 1
Raw material forms:
A isopentenol polyoxyethylene ether
B vinylformic acid
C ethyl propenoate
D allyl methacrylate(AMA)
E ammonium persulphate
F methylpropene sodium sulfonate,
The mol ratio of its raw material is: the consumption of a:b:c:d:f=1:2:2:0.1:0.4, e is 0.5% of a, b and c gross weight.
The synthetic method of superpower slump retaining agent, is made into 30% dropping liquid A by soluble in water together to b, d, be made into 5% dropping liquid B by soluble in water for e, water is added in reactor, then by a, c, f add reactor successively, and stirring is dissolved, and be warming up to 60-70 DEG C, dropping liquid A, B are started evenly drip in reactor simultaneously, all added with 3 ~ 4 hours, and continuing maintenance 60 ~ 70 DEG C 1 hour, reaction terminates.
Embodiment 2
Raw material forms:
A isopentenol polyoxyethylene ether
B methacrylic acid
C propyl acrylate
D allyl methacrylate(AMA)
E Potassium Persulphate
F methylpropene sodium sulfonate,
The mol ratio of its raw material is: the consumption of a:b:c:d:f=1:1.5:1.5:0.05:0.3, e is 1.0% of a, b and c gross weight.
The synthetic method of superpower slump retaining agent, is made into 50% dropping liquid A by soluble in water together to b, d, be made into 10% dropping liquid B by soluble in water for e, water is added in reactor, then by a, c, f add reactor successively, and stirring is dissolved, and be warming up to 60-70 DEG C, dropping liquid A, B are started evenly drip in reactor simultaneously, all added with 3 ~ 4 hours, and continuing maintenance 60 ~ 70 DEG C 1 hour, reaction terminates.
Embodiment 3
A isopentenol polyoxyethylene ether
B vinylformic acid and methacrylic acid
C ethyl propenoate and propyl acrylate
D allyl methacrylate(AMA)
E ammonium persulphate and Potassium Persulphate
F methylpropene sodium sulfonate,
The mol ratio of its raw material is: the consumption of a:b:c:d:f=1:2.5:2:0.15:0.6, e is 1.0% of a, b and c gross weight.
The preferred molar ratio a:b:c:d:f=1:2:2:0.1:0.4 of raw material.
The synthetic method of superpower slump retaining agent, is made into 30% dropping liquid A by soluble in water together to b, d, be made into 5% dropping liquid B by soluble in water for e, water is added in reactor, then by a, c, f add reactor successively, and stirring is dissolved, and be warming up to 60-70 DEG C, dropping liquid A, B are started evenly drip in reactor simultaneously, all added with 3 ~ 4 hours, and continuing maintenance 60 ~ 70 DEG C 1 hour, reaction terminates.
Embodiments of the invention 1, embodiment 2, embodiment 3 product and common polycarboxylate water-reducer are re-dubbed 20% pumping agent product by 1:9 proceed to comparison and detection and the results are shown in following table:
Visible, mix the poly carboxylic acid product of 10% slump retaining agent, not only initial water-reducing rate is uninfluenced, and concrete slump rheological parameters' change with time amount is obviously improved, and can ensure without slump-loss in 3h.
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. superpower slump retaining agent, is characterized in that, is made up of following raw material:
A isopentenol polyoxyethylene ether
B vinylformic acid or methacrylic acid or both mixtures
C ethyl propenoate or propyl acrylate or both mixtures
D allyl methacrylate(AMA)
E ammonium persulphate or Potassium Persulphate
F methylpropene sodium sulfonate,
The mol ratio of its raw material is: a:b:c:d:f=1:(1.5 ~ 2.5): (1.5 ~ 2): (0.05 ~ 0.15): (0.3 ~ 0.6), the consumption of e is 0.5 ~ 1.0% of a, b and c gross weight;
Its synthetic method is: be made into dropping liquid A by soluble in water together to b, d, be made into dropping liquid B by soluble in water for e, water is added in reactor, then by a, c, f adds reactor successively, stirring is dissolved, and is warming up to 60-70 DEG C, by dropping liquid A, B starts evenly to drip in reactor simultaneously, all added with 3 ~ 4 hours, and continue maintenance 60 ~ 70 DEG C 1 hour, reaction terminates.
2. superpower slump retaining agent according to claim 1, is characterized in that, the mol ratio a:b:c:d:f=1:2:2:0.1:0.4 of raw material.
3. superpower slump retaining agent according to claim 1, is characterized in that, the concentration of described dropping liquid A is 30 ~ 50% massfractions.
4. superpower slump retaining agent according to claim 1, is characterized in that, the concentration 5-10% massfraction of described dropping liquid B.
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| CN201310749140.4A CN103724560B (en) | 2013-12-31 | 2013-12-31 | A kind of superpower slump retaining agent and working method thereof |
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| CN201310749140.4A CN103724560B (en) | 2013-12-31 | 2013-12-31 | A kind of superpower slump retaining agent and working method thereof |
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| CN103724560B true CN103724560B (en) | 2016-04-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104446093A (en) * | 2014-12-04 | 2015-03-25 | 河北铁园科技发展有限公司 | Polycarboxylate-based water reducing agent with integrated functions of water reduction and slump retaining |
| CN108219055A (en) * | 2016-12-21 | 2018-06-29 | 宜宾市杰特曼建材有限公司 | A kind of long-acting slump retaining agent and preparation method thereof |
| CN108238738A (en) * | 2018-01-16 | 2018-07-03 | 四川宇砼建材有限公司 | A kind of low viscous type polycarboxylic acids dehydragent and its preparation process |
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| CN102584094A (en) * | 2012-03-09 | 2012-07-18 | 天津诺德建筑材料有限公司 | Polycarboxylic acid slump retaining agent for concrete and preparation method thereof |
| CN102718427A (en) * | 2012-06-21 | 2012-10-10 | 马清浩 | Sulfonyl modified carboxylic acid water-reducing agent and preparation method thereof |
| CN102815882A (en) * | 2012-08-03 | 2012-12-12 | 山西科腾环保科技有限公司 | High-performance water reducer of polycarboxylic acid, and preparation method thereof |
| CN103183793A (en) * | 2013-03-26 | 2013-07-03 | 武汉市联合石油化工有限责任公司 | Synthetic method of polycarboxylic acid type highly slump loss resistant water-reducing agent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4486314B2 (en) * | 2003-04-03 | 2010-06-23 | Ｂａｓｆポゾリス株式会社 | Cement additive |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101104686A (en) * | 2007-07-04 | 2008-01-16 | 江苏省化工研究所有限公司 | Preparation method for polycarboxylic acid high-performance water reducer |
| CN102123965A (en) * | 2008-06-16 | 2011-07-13 | 建筑研究和技术有限公司 | Copolymer admixture system for workability retention of cementitious compositions |
| CN102503226A (en) * | 2011-10-19 | 2012-06-20 | 中建商品混凝土有限公司 | High slump retaining type polycarboxylic acid water reducing agent with sustained-release effect and preparation method thereof |
| CN102584094A (en) * | 2012-03-09 | 2012-07-18 | 天津诺德建筑材料有限公司 | Polycarboxylic acid slump retaining agent for concrete and preparation method thereof |
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| CN102815882A (en) * | 2012-08-03 | 2012-12-12 | 山西科腾环保科技有限公司 | High-performance water reducer of polycarboxylic acid, and preparation method thereof |
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