CN103897116A - Mud-resistant polycarboxylic acid water reducer and preparation method thereof - Google Patents
Mud-resistant polycarboxylic acid water reducer and preparation method thereof Download PDFInfo
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- CN103897116A CN103897116A CN201410071834.1A CN201410071834A CN103897116A CN 103897116 A CN103897116 A CN 103897116A CN 201410071834 A CN201410071834 A CN 201410071834A CN 103897116 A CN103897116 A CN 103897116A
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- polycarboxylate water
- reducer
- chamotte mould
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- mould polycarboxylate
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Abstract
The invention discloses a mud-resistant polycarboxylic acid water reducer. The mud-resistant polycarboxylic acid water reducer is prepared from the following components: vinyl polyoxyethylene ether, sodium p-styrenesulfonate, an acrylic acid and acrylamide compounds as monomers as well as an alkaline neutralizer, an initiator and a molecule modulator as auxiliary materials through copolymerization. The mud-resistant polycarboxylic acid water reducer disclosed by the invention is high in water-reducing rate, small in slump loss, good in mud-resistant effect, free of formaldehyde pollution in a production process, and especially adapts to sand concrete with relatively high mud content.
Description
Technical field
The invention belongs to technical field of concrete additives, be specifically related to a kind of anti-chamotte mould polycarboxylate water-reducer and preparation method thereof.
Background technology
In recent years, the research of concrete admixture and production are increasingly to high-performance, green non-pollution future development.High-efficiency water-reducing agent of poly-carboxylic acid is due to features such as water-reducing rate are high, function of slump protection is good, gain in strength is fast, visual appearance is good, suitable preparation is high-strength, super high strength concrete, high workability and self-compacting concrete, becomes the focus of domestic and international concrete admixture research and development.But polycarboxylate water-reducer is very responsive to cement content in aggregate in concrete, polycarboxylate water-reducer must be faced the difficult problem of aggregate cement content to its influential effect, and also poor for the adaptability of the cement of different areas.
For the problems referred to above, in industry, be generally to subtract type polycarboxylic acids water reducing agent compositional by height to obtain preferably polycarboxylate water-reducer of performance in the mode of slump retaining agent at present, the slump retaining agent that therefore processability is superior is just especially important.U.S. Pat 5362324 and US5911820 disclose the preparation method of the crosslinked build slump retaining agent of a kind of ester, this ester crosslinked is in cement alkaline medium, there is ester hydrolytic cleavage, thereby slowly release low-molecular weight polymer, and then improve the concrete guarantor ability of collapsing.But this crosslinked dispersiveness is in earlier stage poor.The overall shortcoming of this analog copolymer is there is no a dispersiveness early stage, compositely after high water reducing type water reducer, offsets greatly its dispersive ability, and also poor to the cement adaptability of different areas.
Summary of the invention
For the defect of prior art, the invention discloses a kind of anti-chamotte mould polycarboxylate water-reducer, obtained by various of monomer polyreaction, its water-reducing rate is high, lower to cement content susceptibility; And the mud kind adaptability of gained water reducer and cement and each department is better, and production technique is simple and easy to control.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of anti-chamotte mould polycarboxylate water-reducer, adopts following compositions to make: take vinyl Soxylat A 25-7, Sodium styrene sulfonate, vinylformic acid and acrylamides as monomer, be aided with alkaline neutraliser, copolyreaction is carried out in initiator and molecular regulation agent.
In the present invention, the consumption of each composition is not subject to special restriction, and those skilled in the art can regulate each composition consumption to promote carrying out smoothly of reaction as required.
Applicant by lot of experiments optimize reaction conditions, find under following dosage ratio, to there is good performance: vinyl Soxylat A 25-7: Sodium styrene sulfonate: vinylformic acid: acrylamide: initiator: molecular regulation agent: alkaline neutraliser, calculating by quality ratio, is 1.0:(0.9～1.5): (2.5～3.5): (0.5～1.0): (0.1～0.3): (0.1～0.4): (0.3～0.8).Under this compositing formula, the water reducer of preparing uses and has good anti-mud effect separately, has higher dispersion and slump hold facility, and each department mud kind is had to better adaptability in the time that concrete silt content is less than 10%, pollution-free in production process, wastage of material is also less.
In the present invention, when being 400-3000 concrete use, described vinyl Soxylat A 25-7 (VPEG) molecular weight can select the VPEG of a kind of specified molecular weight in above-mentioned molecular weight ranges, also can be the close mixture of the multiple VPEG that states molecular weight ranges of selector, preferably, vinyl Soxylat A 25-7 used (VPEG) molecular weight is one or more admixtured polyether of 400,800,1200,2000,2400,3000 molecular weight requirements.
In the present invention, acrylamides comprises one or more the mixture in acrylamide, n-methylolacrylamide, hydroxyethyl acrylamide, acrylamido dimethyl ethyl sulfonic acid.
In the present invention, alkaline neutraliser is inorganic metal alkali or organic amine alkali, includes but not limited to one or more the mixture in sodium hydroxide, potassium hydroxide, Tetramethyl Ethylene Diamine, thanomin, diethanolamine.
In the present invention, initiator is that one can produce free radical or ion isoreactivity kind, to cause the material of chain polymerization, common initiator comprises peralcohol initiator and azo-initiator and redox initiator, initiator is preferably superoxide in the present invention, comprises a kind of in hydrogen peroxide, ammonium persulphate, Potassium Persulphate, benzoyl peroxide and/or more than one mixture.
In the present invention, molecular regulation agent comprises one or more the mixture in mercaptoethanol, Thiovanic acid, thiohydracrylic acid.
In the present invention, described Sodium styrene sulfonate is not limited to this compound itself, also can comprise compounds of all additional other groups based on this, comprise one or more the mixture in vinyl benzenesulfonic acid sodium, ethylene methacrylic benzene sulfonic acid sodium salt, ethylethylene benzene sulfonic acid sodium salt.
On this basis, the invention also discloses the preparation method of described anti-chamotte mould polycarboxylate water-reducer, each composition is added to the water, take vinyl Soxylat A 25-7 (VPEG), Sodium styrene sulfonate, vinylformic acid and acrylamides as monomer, and be aided with alkaline neutraliser, add initiator and molecular regulation agent to carry out copolyreaction under 60～90 ℃ of conditions and make.
Wherein, the consumption of water can be adjusted as required, be generally into each composition total mass and 20～30 times.
Water reducer of the present invention has been introduced styrene sulfonic acid sodium molecule and has been participated in reaction, reduce the large monomer of traditional polyoxyethylene and added the possibility being adsorbed on earth, and on molecular chain, increase a large amount of sulfonic acid groups, by adding of modified monomer acrylate, make polycarboxylate water-reducer there is very high slump retention compared with traditional water reducer, and the higher cement of silt content is had to good adaptability.
The experiment confirmation that applicant carries out, compared with existing water reducer, the present invention has following technical progress:
1. water-reducing rate is higher, and different volume water-reducing rates can reach 25%～35%, under lower volume, the higher concrete of silt content is had to good dispersiveness.
2. little containing the concrete slump loss of mud, and workability is better, is conducive to concrete construction and builds.
3. the adaptability of the mud kind of cement and each department is better.
4. pollution-free in production process, belong to environmentfriendly products.
Embodiment
Embodiment 1
By vinyl Soxylat A 25-7: Sodium styrene sulfonate: vinylformic acid: water: acrylamide: ammonium persulphate: mercaptoethanol: potassium hydroxide=1.0:0.9:2.5:180:0.3:0.2:0.5 (each component all in molar ratio) feeds intake, be warmed up to 60 ℃, make the transparent liquid of colourless thickness through 5h polyreaction.
Embodiment 2
By vinyl Soxylat A 25-7: Sodium styrene sulfonate: vinylformic acid: water: n-methylolacrylamide: hydrogen peroxide: Thiovanic acid: Tetramethyl Ethylene Diamine=1.0:1.0:3.0:180:0.15:0.1:0.35 (each component all in molar ratio) feeds intake, be warmed up to 65 ℃, make the transparent liquid of yellow thickness through 5h polyreaction.Embodiment 3
By vinyl Soxylat A 25-7: Sodium styrene sulfonate: vinylformic acid: water: acrylamido dimethyl ethyl sulfonic acid: Potassium Persulphate: thiohydracrylic acid: thanomin=1.0:1.1:3.5:180:0.25:0.2:0.4 (each component all in molar ratio) feeds intake, be warmed up to 70 ℃, make the transparent liquid of yellow thickness through 5h polyreaction.
Embodiment 4
By vinyl Soxylat A 25-7: Sodium styrene sulfonate: vinylformic acid: water: acrylamido dimethyl ethyl sulfonic acid: ammonium persulphate: thiohydracrylic acid: diethanolamine=1.0:1.0:3.5:180:0.25:0.2:0.4 (each component all in molar ratio) feeds intake, be warmed up to 70 ℃, make the transparent liquid of yellow thickness through 5h polyreaction.
Application Example 1
For evaluate anti-chamotte mould polycarboxylate water-reducer of the present invention to containing the dispersing property of material-mud, according to the method for measuring flowing degree of net paste of cement in GB/T8077-2000 " Methods for testing uniformity of concrete admixture ", reference cement 300g, amount of water is 87g, the solid volume of the folding of water reducer is cement quality 0.15%, adopt clean slurry stirrer to test initial clean slurry degree of mobilization and the clean slurry degree of mobilization after 1 hour, silt content selects 5% and 10% to test, and experimental result is in table 1.
Table 1 cement content is 5% and 10% flowing degree of net paste of cement experiment
As can be seen from Table 1, sample flowing degree of net paste of cement in the time that silt content is 5% is higher, and initial flow degree is smaller when 10% silt content, and the retentivity of 1h is all better.Compare with commercially available general polycarboxylate water-reducer, the common polycarboxylate water-reducer of commercially available use improves the rear initial flow degree of volume to 0.22% and does not still reach the initial of sample, and after increasing cement content, retentivity is also poor.
Application Example 2
In order to evaluate the adaptability to different areas cement and clay of anti-chamotte mould polycarboxylate water-reducer of the present invention, according to measuring concrete method in GB/8076-2008 " concrete admixture ", with identical proportioning, the solid volume of folding is 0.18%, to sample and commercially available common polycarboxylate water-reducer product test, adopt concrete mixer to test the slump, experimental result is in table 2.
The adaptive experiment of table 2 sample concrete
As can be seen from Table 2, anti-chamotte mould polycarboxylate water-reducer of the present invention still has good concrete performance under the cement to different areas and silt content condition, shows that the anti-chamotte mould polycarboxylate water-reducer of being prepared by present method has excellent dispersing property and adaptability to the cement of different areas.
Claims (10)
1. an anti-chamotte mould polycarboxylate water-reducer, it is characterized in that adopting following compositions to make: take vinyl Soxylat A 25-7, Sodium styrene sulfonate, vinylformic acid and acrylamides as monomer, be aided with alkaline neutraliser, copolyreaction is carried out in initiator and molecular regulation agent.
2. anti-chamotte mould polycarboxylate water-reducer according to claim 1, is characterized in that each constituent mass than being vinyl Soxylat A 25-7: Sodium styrene sulfonate: vinylformic acid: acrylamide: initiator: molecular regulation agent: alkaline neutraliser=1:(0.9～1.5): (2.5～3.5): (0.5～1.0): (0.1～0.3): (0.1～0.4): (0.3～0.8).
3. anti-chamotte mould polycarboxylate water-reducer according to claim 1, is characterized in that described vinyl Soxylat A 25-7 molecular weight is 400-3000.
4. anti-chamotte mould polycarboxylate water-reducer according to claim 1, is characterized in that acrylamides comprises one or more the mixture in acrylamide, n-methylolacrylamide, hydroxyethyl acrylamide, acrylamido dimethyl ethyl sulfonic acid.
5. anti-chamotte mould polycarboxylate water-reducer according to claim 1, is characterized in that alkaline neutraliser comprises electrodeless metal base and/or organic amine alkali.
6. anti-chamotte mould polycarboxylate water-reducer according to claim 6, is characterized in that alkaline neutraliser comprises one or more the mixture in sodium hydroxide, potassium hydroxide, Tetramethyl Ethylene Diamine, thanomin, diethanolamine.
7. anti-chamotte mould polycarboxylate water-reducer according to claim 1, is characterized in that initiator comprises hydrogen peroxide, the mixture of one or more in ammonium persulphate, benzoyl peroxide.
8. anti-chamotte mould polycarboxylate water-reducer according to claim 1, is characterized in that molecular regulation agent comprises one or more the mixture in mercaptoethanol, Thiovanic acid, thiohydracrylic acid.
9. the preparation method of above-mentioned arbitrary anti-chamotte mould polycarboxylate water-reducer, it is characterized in that each composition to be added to the water, take vinyl Soxylat A 25-7 (VPEG), Sodium styrene sulfonate, vinylformic acid and acrylamides as monomer, and be aided with alkaline neutraliser, add initiator and molecular regulation agent to carry out copolyreaction under 60～90 ℃ of conditions and make.
10. preparation method according to claim 10, the consumption that it is characterized in that water be each composition total mass and 20～30 times.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104193913A (en) * | 2014-08-12 | 2014-12-10 | 陕西科技大学 | Early-strength polycarboxylate concrete water reducing agent and preparation method thereof |
| CN104371079A (en) * | 2014-11-27 | 2015-02-25 | 新疆德蓝股份有限公司 | Mud-resistant polycarboxylate superplasticizer |
| CN104861127A (en) * | 2015-04-10 | 2015-08-26 | 广州市建筑科学研究院有限公司 | Preparation method for anti-mud-type polycarboxylic-acid water-reducing agent and application thereof |
| CN105754034A (en) * | 2016-03-09 | 2016-07-13 | 合众（佛山）化工有限公司 | N-Methylolacrylamide modified polycarboxylate ceramic water reducer and normal-temperature preparation method and application thereof |
| CN104609761B (en) * | 2015-02-13 | 2016-12-07 | 重庆欣材混凝土集团股份有限公司 | A kind of water reducing agent in series of polyocarboxy acid for concrete regulator and preparation method |
| CN106749955A (en) * | 2015-11-20 | 2017-05-31 | 衡阳市银利实业有限公司 | A kind of anti-chamotte mould polycarboxylate water-reducer |
| CN106750045A (en) * | 2015-11-20 | 2017-05-31 | 衡阳市银利实业有限公司 | A kind of method for preparing anti-chamotte mould polycarboxylate water-reducer |
| CN107325236A (en) * | 2017-07-15 | 2017-11-07 | 刘翠芬 | A kind of non-soil responsive type polycarboxylate water-reducer and preparation method thereof |
| CN107459599A (en) * | 2017-09-07 | 2017-12-12 | 上海高铁化学建材有限公司 | A kind of anti-chamotte mould polycarboxylate water-reducer and preparation method thereof |
| CN109053971A (en) * | 2018-07-09 | 2018-12-21 | 湖北工业大学 | A kind of polycarboxylate water-reducer preparation method of the high long short-chain branch of carboxyl density |
| CN109796561A (en) * | 2018-12-18 | 2019-05-24 | 贵州科之杰新材料有限公司 | A kind of aromatic ring class polycarboxylate superplasticizer mother liquor and its preparation method and application |
| CN109824836A (en) * | 2019-01-29 | 2019-05-31 | 广东瑞安科技实业有限公司 | Workability is good, wide adaptability polycarboxylate water-reducer and preparation method thereof |
| CN109880019A (en) * | 2019-01-29 | 2019-06-14 | 广东瑞安科技实业有限公司 | A kind of workability is good, wide adaptability polycarboxylate water-reducer and preparation method thereof |
| CN111087516A (en) * | 2019-12-18 | 2020-05-01 | 深圳大学 | Mud-resistant polycarboxylic water reducer and preparation method and application thereof |
| CN111423146A (en) * | 2020-03-03 | 2020-07-17 | 深圳市三绿科技有限公司 | Anti-mud agent and preparation method thereof |
| CN111423154A (en) * | 2020-03-03 | 2020-07-17 | 深圳市三绿科技有限公司 | Concrete glue reducing agent and preparation method thereof |
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| CN103396031A (en) * | 2013-07-19 | 2013-11-20 | 北京东方雨虹防水技术股份有限公司 | Carboxylate water reducing agent and preparation method thereof |
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Patent Citations (1)
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| CN103396031A (en) * | 2013-07-19 | 2013-11-20 | 北京东方雨虹防水技术股份有限公司 | Carboxylate water reducing agent and preparation method thereof |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104193913B (en) * | 2014-08-12 | 2016-09-28 | 陕西科技大学 | A kind of early-strength polycarboxylate concrete dehydragent and preparation method thereof |
| CN104193913A (en) * | 2014-08-12 | 2014-12-10 | 陕西科技大学 | Early-strength polycarboxylate concrete water reducing agent and preparation method thereof |
| CN104371079A (en) * | 2014-11-27 | 2015-02-25 | 新疆德蓝股份有限公司 | Mud-resistant polycarboxylate superplasticizer |
| CN104609761B (en) * | 2015-02-13 | 2016-12-07 | 重庆欣材混凝土集团股份有限公司 | A kind of water reducing agent in series of polyocarboxy acid for concrete regulator and preparation method |
| CN104861127A (en) * | 2015-04-10 | 2015-08-26 | 广州市建筑科学研究院有限公司 | Preparation method for anti-mud-type polycarboxylic-acid water-reducing agent and application thereof |
| CN104861127B (en) * | 2015-04-10 | 2017-06-27 | 广州市建筑科学研究院有限公司 | A kind of preparation method and applications of anti-chamotte mould polycarboxylate water-reducer |
| CN106749955A (en) * | 2015-11-20 | 2017-05-31 | 衡阳市银利实业有限公司 | A kind of anti-chamotte mould polycarboxylate water-reducer |
| CN106750045A (en) * | 2015-11-20 | 2017-05-31 | 衡阳市银利实业有限公司 | A kind of method for preparing anti-chamotte mould polycarboxylate water-reducer |
| CN105754034B (en) * | 2016-03-09 | 2018-06-29 | 合众（佛山）化工有限公司 | N hydroxymethyl acrylamide modified polycarboxylic acid ceramic water reducing agent and its normal temperature preparation method and application |
| CN105754034A (en) * | 2016-03-09 | 2016-07-13 | 合众（佛山）化工有限公司 | N-Methylolacrylamide modified polycarboxylate ceramic water reducer and normal-temperature preparation method and application thereof |
| CN107325236A (en) * | 2017-07-15 | 2017-11-07 | 刘翠芬 | A kind of non-soil responsive type polycarboxylate water-reducer and preparation method thereof |
| CN107459599A (en) * | 2017-09-07 | 2017-12-12 | 上海高铁化学建材有限公司 | A kind of anti-chamotte mould polycarboxylate water-reducer and preparation method thereof |
| CN109053971A (en) * | 2018-07-09 | 2018-12-21 | 湖北工业大学 | A kind of polycarboxylate water-reducer preparation method of the high long short-chain branch of carboxyl density |
| CN109796561A (en) * | 2018-12-18 | 2019-05-24 | 贵州科之杰新材料有限公司 | A kind of aromatic ring class polycarboxylate superplasticizer mother liquor and its preparation method and application |
| CN109796561B (en) * | 2018-12-18 | 2021-06-15 | 科之杰新材料集团(贵州)有限公司 | Aromatic ring polycarboxylic acid water reducing agent mother liquor and preparation method and application thereof |
| CN109824836A (en) * | 2019-01-29 | 2019-05-31 | 广东瑞安科技实业有限公司 | Workability is good, wide adaptability polycarboxylate water-reducer and preparation method thereof |
| CN109880019A (en) * | 2019-01-29 | 2019-06-14 | 广东瑞安科技实业有限公司 | A kind of workability is good, wide adaptability polycarboxylate water-reducer and preparation method thereof |
| CN111087516A (en) * | 2019-12-18 | 2020-05-01 | 深圳大学 | Mud-resistant polycarboxylic water reducer and preparation method and application thereof |
| CN111423146A (en) * | 2020-03-03 | 2020-07-17 | 深圳市三绿科技有限公司 | Anti-mud agent and preparation method thereof |
| CN111423154A (en) * | 2020-03-03 | 2020-07-17 | 深圳市三绿科技有限公司 | Concrete glue reducing agent and preparation method thereof |
| CN111423154B (en) * | 2020-03-03 | 2021-10-15 | 深圳市三绿科技有限公司 | Concrete glue reducing agent and preparation method thereof |
| CN111423146B (en) * | 2020-03-03 | 2022-01-04 | 深圳市三绿科技有限公司 | Anti-mud agent and preparation method thereof |
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Application publication date: 20140702 |