CN104478284A - Polycarboxylate superplasticizer and preparation method thereof - Google Patents
Polycarboxylate superplasticizer and preparation method thereof Download PDFInfo
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- CN104478284A CN104478284A CN201410754679.3A CN201410754679A CN104478284A CN 104478284 A CN104478284 A CN 104478284A CN 201410754679 A CN201410754679 A CN 201410754679A CN 104478284 A CN104478284 A CN 104478284A
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Abstract
The invention provides a polycarboxylate superplasticizer which has good water reducing property, slump retention capacity, segregation resistance and bleeding resistance. A standard type and a slump retention type are combined into a whole, and the advantages of high performance admixtures are fully reflected; and moreover, the polycarboxylate superplasticizer can be used for preparing concrete in which the quality of sand-gravel material is low or the cement adaptability is poor and less gelling material is used.
Description
Technical field
the invention belongs to chemical field, be specifically related to high-efficiency water-reducing agent of poly-carboxylic acid and preparation method thereof.
Background technology
Be that the high efficiency water reducing agent of major ingredient has certain bleed with polycarboxylic acid salt, water-reducing rate is higher simultaneously, and slump retention performance is good, is typical environment-friendly type concrete admixture.Within 2000, China starts production and the application of poly carboxylic acid series water reducer, high ferro construction in 2007 drives the fast development of polycarboxylate high performance water-reducing agent, 2011 start, stirring station in all parts of the country accepts the application of poly carboxylic acid series water reducer in middle low grade pump concrete successively, and output is had significantly to be increased.
But, currently marketed high-efficiency water-reducing agent of poly-carboxylic acid, to second-rate sand material, the non-constant of sand material adaptability that particularly silt content is large, often makes high-efficiency water-reducing agent of poly-carboxylic acid can not play effect of its efficient diminishing, and slump-loss is also quite fast, simultaneously conventional polycarboxylate water-reducer is divided into standard type and collapse protection type two kinds, it is composite for being also unfavorable for operated by personnel in concrete production, add the difficulty of composite water reducer work, improve cost.
Summary of the invention
The object of the present invention is to provide: 1. standard type and collapse protection type are united two into one, the high-efficiency water-reducing agent of poly-carboxylic acid of high performance additive advantage can be fully demonstrated; 2. can be used for sand material of poor quality, or high-efficiency water-reducing agent of poly-carboxylic acid during cement adaptability is bad, gelling material is less Concrete; 3. without the need to thermal source, with regard to producible high-efficiency water-reducing agent of poly-carboxylic acid under normal temperature; 4. there is the high-efficiency water-reducing agent of poly-carboxylic acid of very high water-reducing rate; 5. the high-efficiency water-reducing agent of poly-carboxylic acid of concrete slump retention ability and anti-segregation, anti-bleeding performance is significantly improved.
The object of the invention is to be realized by following measures:
A kind of high-efficiency water-reducing agent of poly-carboxylic acid, forms by with following composition and weight ratio:
Polymeric monomer (isopentenol polyoxyethylene ether TPEG, molecular weight 2400) 300-332 part, water 300-400 part, hydrogen peroxide 1-2 part, ammonium persulphate 0.5-1.5 part;
A expects: vinylformic acid 30-50 part, Thiovanic acid 1.2-2 part, water 100-150 part;
B expects: xitix VC1-2 part, water 150-200 part;
Liquid caustic soda (30% mass concentration): 10-16 part.
Above-mentioned material is indispensable, and also unavailable unclassified stores substitutes, and particularly TPEG can not use HPEG, MPEG or other material substitution, otherwise the product slump retention value produced is poor, and simultaneous oxidation reduction system is also organic unification, can not change.
The preparation method of above-mentioned high-efficiency water-reducing agent of poly-carboxylic acid, comprise the following steps: by weight water is added in reactor, then polymeric monomer TPEG is put into, stir 40 minutes, add hydrogen peroxide after material is fully dissolved and stir 15 minutes, then add ammonium persulphate to stir, after ammonium persulphate stirs 20 minutes, start to drip A material and B material, A expects to dropwise for 80 minutes, B expects to dropwise for 140 minutes, B material dropwises rear stirring 40 minutes, survey its potential of hydrogen, then liquid caustic soda is mixed, adjust ph, make pH value reach 5-8(and affect product water-reducing rate), stir and get product for 10 minutes.The present invention makes raw material fully react under the condition ensureing working efficiency, effectively obtained polycarboxylate water-reducer, and improves product water-reducing rate, improves concrete slump hold facility and the quality such as anti-segregation, anti-bleeding performance.
beneficial effect
1. standard type and collapse protection type unite two into one by the present invention, can fully demonstrate the advantage of high performance additive;
2. to can be used for sand material of poor quality in the present invention, or the concrete preparation that cement adaptability is bad, gelling material is less;
3. the present invention is without the need to thermal source, just can produce under normal temperature;
4. high-efficiency water-reducing agent of poly-carboxylic acid of the present invention has very high water-reducing rate, and water-reducing rate can reach 48-50%;
5. high-efficiency water-reducing agent of poly-carboxylic acid of the present invention significantly improves concrete slump retention ability and anti-segregation, anti-bleeding performance, accomplishes a hour slump rheological parameters' change with time amount≤40mm, bleeding rate≤40%.
Embodiment
The present invention is further illustrated below in conjunction with embodiment.In following examples, if no special instructions, in mass fraction.
embodiment 1
Reactor is put into by weight water intaking 354 parts, scale polymeric monomer TPEG(molecular weight is 2400) 330.6 parts with water stirring and dissolving, hydrogen peroxide 1.2 parts stirring is added after 40 minutes, add ammonium persulphate 1.3 parts after 15 minutes to stir 20 minutes, start to drip A material: 107 parts, vinylformic acid 31 parts+Thiovanic acid 1.2 parts+water, drip B material: water 156 parts+xitix VC1.7 part simultaneously, A expects to dropwise for 80 minutes, B expects to dropwise for 140 minutes, B material dropwises rear stirring 40 minutes, survey its potential of hydrogen, add liquid caustic soda 16 parts, adjust ph, pH value is made to be 5-8, stir and get product after 10 minutes.
The high-efficiency water-reducing agent of poly-carboxylic acid water-reducing rate of gained is 48%, hour slump rheological parameters' change with time amount≤40mm, bleeding rate≤40%, has good water reducing ability and slump retention ability and anti-segregation, anti-bleeding performance; And standard type and collapse protection type are united two into one, fully demonstrate the advantage of high performance additive; Can be used for sand material of poor quality, or the concrete preparation that cement adaptability is bad, gelling material is less.
embodiment 2
Reactor is put into by weight water intaking 320 parts, scale polymeric monomer TPEG(molecular weight is 2400) 301 parts with water stirring and dissolving, hydrogen peroxide 1.6 parts stirring is added after 40 minutes, add ammonium persulphate 0.6 part after 15 minutes to stir 20 minutes, start to drip A material: 130 parts, vinylformic acid 38.1 parts+Thiovanic acid 1.7 parts+water, drip B material: water 190 parts+xitix VC 1 part simultaneously, A expects to dropwise for 80 minutes, B expects to dropwise for 140 minutes, B material dropwises rear stirring 40 minutes, survey its potential of hydrogen, add liquid caustic soda 16 parts, adjust ph, pH value is made to be 5-8, stir and get product after 10 minutes.
The high-efficiency water-reducing agent of poly-carboxylic acid water-reducing rate of gained is 49%, hour slump rheological parameters' change with time amount≤40mm, bleeding rate≤40%, has good water reducing ability and slump retention ability and anti-segregation, anti-bleeding performance; And standard type and collapse protection type are united two into one, fully demonstrate the advantage of high performance additive; Can be used for sand material of poor quality, or the concrete preparation that cement adaptability is bad, gelling material is less.
embodiment 3
Reactor is put into by weight water intaking 370 parts, scale polymeric monomer TPEG(molecular weight is 2400) 307.9 parts with water stirring and dissolving, hydrogen peroxide 1.9 parts stirring is added after 40 minutes, add ammonium persulphate 1 part after 15 minutes to stir 20 minutes, start to drip A material: 100 parts, vinylformic acid 40 parts+Thiovanic acid 2 parts+water, drip B material: water 160 parts+xitix VC 1.2 parts simultaneously, A expects to dropwise for 80 minutes, B expects to dropwise for 140 minutes, B material dropwises rear stirring 40 minutes, survey its potential of hydrogen, add liquid caustic soda 16 parts, adjust ph, pH value is made to be 5-8, stir and get product after 10 minutes.
The high-efficiency water-reducing agent of poly-carboxylic acid water-reducing rate of gained is 50%, hour slump rheological parameters' change with time amount≤40mm, bleeding rate≤40%, has good water reducing ability and slump retention ability and anti-segregation, anti-bleeding performance; And standard type and collapse protection type are united two into one, fully demonstrate the advantage of high performance additive; Can be used for sand material of poor quality, or the concrete preparation that cement adaptability is bad, gelling material is less.
Claims (4)
1. a high-efficiency water-reducing agent of poly-carboxylic acid, forms by with following composition and weight ratio:
Polymeric monomer (isopentenol polyoxyethylene ether TPEG) 300-332 part, water 300-400 part, hydrogen peroxide 1-2 part, ammonium persulphate 0.5-1.5 part;
A expects: vinylformic acid 30-50 part, Thiovanic acid 1.2-2 part, water 100-150 part;
B expects: xitix VC 1-2 part, water 150-200 part;
Liquid caustic soda: 10-16 part.
2. high-efficiency water-reducing agent of poly-carboxylic acid as claimed in claim 1, the molecular weight of described isopentenol polyoxyethylene ether is 2400.
3. high-efficiency water-reducing agent of poly-carboxylic acid as claimed in claim 1 or 2, described liquid caustic soda concentration is 30%.
4. the preparation method of high-efficiency water-reducing agent of poly-carboxylic acid as claimed in claim 1, comprise the following steps: by weight water is added in reactor, then polymeric monomer TPEG is put into, stir 40 minutes, add hydrogen peroxide after material is fully dissolved and stir 15 minutes, then add ammonium persulphate to stir, after ammonium persulphate stirs 20 minutes, start to drip A material and B material, A expects to dropwise for 80 minutes, B expects to dropwise for 140 minutes, B material dropwises rear stirring 40 minutes, survey its potential of hydrogen, then liquid caustic soda is mixed, adjust ph, pH value is made to reach 5-8, stir and get product for 10 minutes.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105085821A (en) * | 2015-07-23 | 2015-11-25 | 潍坊华强特种材料科技有限公司 | Heat-energy-free novel integrated efficient polycarboxylic acid water reducer and preparation method therefor |
| CN105669078A (en) * | 2016-03-14 | 2016-06-15 | 同济大学 | Special pumping agent for concrete compounded for cyclic utilization of waste water |
| CN105819729A (en) * | 2016-03-30 | 2016-08-03 | 山东净金新能源有限公司 | Standard polycarboxylate water reducer and preparing method and application thereof |
| CN106380552A (en) * | 2016-09-29 | 2017-02-08 | 湖北工业大学 | High-adaptability polycarboxylic acid water reducing agent master batch |
| CN108545986A (en) * | 2018-07-06 | 2018-09-18 | 江苏万邦新材料科技有限公司 | A kind of collapse protective poly-carboxylic acid water reducing agent and preparation method thereof |
| CN110054737A (en) * | 2019-04-24 | 2019-07-26 | 山东易和建材科技有限公司 | A kind of high performance water reducing agent of polyocarboxy acid and preparation method thereof |
| CN110358022A (en) * | 2019-07-31 | 2019-10-22 | 重庆市潼南区富景新材料科技有限公司 | A kind of poly- carboxylic acid slump retaining agent and preparation method thereof |
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| CN102030494A (en) * | 2010-11-12 | 2011-04-27 | 河北金舵建材科技开发有限公司 | High-performance polycarboxylate water reducing agent and low-temperature one-step preparation method thereof |
| CN102617065A (en) * | 2012-03-06 | 2012-08-01 | 上海市建筑科学研究院(集团)有限公司 | Multi-branch polycarboxylic acid water reducing agent with slump-retaining performance and preparation method thereof |
| CN103183788A (en) * | 2011-12-27 | 2013-07-03 | 山西黄腾化工有限公司 | Preparation method for polycarboxylic acid type concrete slump-retaining agent |
| CN103275280A (en) * | 2013-06-17 | 2013-09-04 | 武汉东彭科技发展有限公司 | Synthetic method for polycarboxylate type high slump-retaining water reducing agent at normal temperature |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102030494A (en) * | 2010-11-12 | 2011-04-27 | 河北金舵建材科技开发有限公司 | High-performance polycarboxylate water reducing agent and low-temperature one-step preparation method thereof |
| CN103183788A (en) * | 2011-12-27 | 2013-07-03 | 山西黄腾化工有限公司 | Preparation method for polycarboxylic acid type concrete slump-retaining agent |
| CN102617065A (en) * | 2012-03-06 | 2012-08-01 | 上海市建筑科学研究院(集团)有限公司 | Multi-branch polycarboxylic acid water reducing agent with slump-retaining performance and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105085821A (en) * | 2015-07-23 | 2015-11-25 | 潍坊华强特种材料科技有限公司 | Heat-energy-free novel integrated efficient polycarboxylic acid water reducer and preparation method therefor |
| CN105669078A (en) * | 2016-03-14 | 2016-06-15 | 同济大学 | Special pumping agent for concrete compounded for cyclic utilization of waste water |
| CN105669078B (en) * | 2016-03-14 | 2017-12-05 | 同济大学 | A kind of concrete pump-feed agent for being used in cycling utilization of wastewater and being prepared |
| CN105819729A (en) * | 2016-03-30 | 2016-08-03 | 山东净金新能源有限公司 | Standard polycarboxylate water reducer and preparing method and application thereof |
| CN106380552A (en) * | 2016-09-29 | 2017-02-08 | 湖北工业大学 | High-adaptability polycarboxylic acid water reducing agent master batch |
| CN108545986A (en) * | 2018-07-06 | 2018-09-18 | 江苏万邦新材料科技有限公司 | A kind of collapse protective poly-carboxylic acid water reducing agent and preparation method thereof |
| CN110054737A (en) * | 2019-04-24 | 2019-07-26 | 山东易和建材科技有限公司 | A kind of high performance water reducing agent of polyocarboxy acid and preparation method thereof |
| CN110358022A (en) * | 2019-07-31 | 2019-10-22 | 重庆市潼南区富景新材料科技有限公司 | A kind of poly- carboxylic acid slump retaining agent and preparation method thereof |
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