CN105384385A - High-efficiency slow-setting concrete water reducer and preparation method thereof - Google Patents
High-efficiency slow-setting concrete water reducer and preparation method thereof Download PDFInfo
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- CN105384385A CN105384385A CN201510887491.0A CN201510887491A CN105384385A CN 105384385 A CN105384385 A CN 105384385A CN 201510887491 A CN201510887491 A CN 201510887491A CN 105384385 A CN105384385 A CN 105384385A
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Abstract
The invention discloses a high-efficiency slow-setting concrete water reducer. The water reducer is prepared from the following raw materials by weight: 2 to 4 parts of maltodextrin, 2 to 4 parts of polyvinyl alcohol, 0.3 to 0.5 part of coconut diethanolamide, 5 to 10 parts of hydrogen peroxide with a concentration of 20 to 30%, 0.1 to 0.2 part of polysorbate-80, 2 to 2.5 parts of xylitol, 2 to 4 parts of urea, 2 to 4 parts of sodium gluconate, 40 to 50 parts of modified polycarboxylic acid mother liquor and 40 to 50 parts of water. The water reducer has good compatibility with cement, is small in doping amount and high in a water reducing rate, can improve the bonding strength of cement and strengthen compression resistance and fracture resistance of concrete, shows good slow setting effect, enables concrete to have long setting time, high strength and good application properties, and has a high practical value.
Description
Technical field
The present invention relates to chemical assistant technical field, particularly relate to a kind of efficient retarded concrete water reducer and preparation method thereof.
Background technology
Cement water reducing agent is one of staple product of building materials industry, in concrete mix, add Water-reducing Admixtures To Cements particle have dissemination, the mobility of concrete mix can be improved, reduce unit cement consumption, save cement, ensure concrete workability and intensity simultaneously.Water reducer conventional at present mainly contains lignin sulfonate, naphthalene water reducer class and poly carboxylic acid series water reducer class.Poly carboxylic acid series water reducer has the advantages such as water-reducing rate is high, reinforced effects is remarkable, concrete workability better, environmental protection, is the water reducer of most application prospect in recent years.But in actual concrete works uses, there is the problem with cement consistency in poly carboxylic acid series water reducer, its result of use affects larger by cement moiety.Time particularly containing compositions such as clays, due to the Inter layer adsorption effect of clay, serious on the diminishing dispersing property impact of polycarboxylate water-reducer, concrete serviceability is reduced, constrains widespread use and the development of poly carboxylic acid series water reducer.And current domestic poly carboxylic acid series water reducer product development is not yet ripe, of less types, is difficult to content with funtion, the diversified market requirement, need further exploitation and perfect.In large-scale concrete engineering application, for making volume of concrete contraction evenly wish to delay time of coagulation, therefore, the water reducer that exploitation has delayed coagulation has higher realistic meaning.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of efficient retarded concrete water reducer and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of efficient retarded concrete water reducer, it is obtained by the raw material of following weight parts:
Maltodextrin 2-4, polyvinyl alcohol 2-4, lauric acid amide of ethanol 0.3-0.5,20%-30% hydrogen peroxide 5-10, Tween-80 0.1-0.2, Xylitol 2-2.5, urea 2-4, Sunmorl N 60S 2-4, modified polycarboxylic acid mother liquor 40-50, water 40-50;
Wherein modified polycarboxylic acid mother liquor is made up of the raw material of following weight part: vinylformic acid 30-40, methyl methacrylate 10-15, poly glycol monomethyl ether 10-15, feather protein 3-5, carboxymethyl cellulose 3-5, Potassium Persulphate 0.5-1, water 100-150; The preparation method of modified polycarboxylic acid mother liquor be carboxymethyl cellulose, feather protein and Potassium Persulphate are added 1/2-2/3 amount water in 60-80 DEG C stir 0.5-1h obtain A liquid, all the other raw materials are mixed to obtain B liquid, then A liquid and B liquid are added 70-80 DEG C of stirring reaction 4-6h in reactor jointly, after cooling, pH is adjusted to 8-9, obtains final product.
A preparation method for efficient retarded concrete water reducer, comprises the following steps:
(1) raw material is taken by weight, first Tween-80 and lauric acid amide of ethanol are added to the water and dissolve completely, then maltodextrin and polyvinyl alcohol 80-90 DEG C of stirring 1-2h is added, then temperature is adjusted to 50-60 DEG C, add 20%-30% hydrogen peroxide and stir 4-6h, after cooling, pH is adjusted to 7-8, obtains mixed solution;
(2) after being mixed with modified polycarboxylic acid mother liquor by the mixed solution in (1), 70-80 DEG C is stirred 0.5-1h, adds all the other raw material stirring evenly, obtain efficient retarded concrete water reducer after cooling.
Advantage of the present invention is:
The present invention is by the introducing of feather protein and carboxymethyl cellulose pluronic polymer, make the modified polycarboxylic acid mother liquor of synthesis good to cement adaptability, effectively can reduce the Inter layer adsorption of clay, there is good diminishing dispersing property, pass through the composite of all the other raw materials simultaneously, the Water-reducing Admixtures To Cements obtained is made to have good consistency, volume is little, water-reducing rate is high, the cohesive strength of cement can be improved, the resistance to compression of Concrete Structure, fracture resistance, and there is good retarding effect, concrete coagulating time is long, intensity is high, workability is good, there is higher practical value.
Embodiment
A kind of efficient retarded concrete water reducer, it is obtained by the raw material of following weight parts:
Maltodextrin 2, polyvinyl alcohol 2, lauric acid amide of ethanol 0.3,20% hydrogen peroxide 5, Tween-80 0.1, Xylitol 2, urea 2, Sunmorl N 60S 2, modified polycarboxylic acid mother liquor 40, water 40;
Wherein modified polycarboxylic acid mother liquor is made up of the raw material of following weight part: vinylformic acid 30, methyl methacrylate 10, poly glycol monomethyl ether 10, feather protein 3, carboxymethyl cellulose 3, Potassium Persulphate 0.5, water 100; Carboxymethyl cellulose, feather protein and Potassium Persulphate are added 60 DEG C of stirring 0.5h in the water of 1/2 amount to obtain A liquid by the preparation method of modified polycarboxylic acid mother liquor, all the other raw materials are mixed to obtain B liquid, then A liquid and B liquid are added 70 DEG C of stirring reaction 4h in reactor jointly, after cooling, pH is adjusted to 8, obtains final product.
A preparation method for efficient retarded concrete water reducer, comprises the following steps:
(1) take raw material by weight, first Tween-80 and lauric acid amide of ethanol are added to the water and dissolve completely, then add maltodextrin and polyvinyl alcohol 80 DEG C stirring 1h, then temperature is adjusted to 50 DEG C, add 20% hydrogen peroxide and stir 4h, after cooling, pH is adjusted to 7, obtains mixed solution;
(2) mixed solution in (1) is mixed latter 70 DEG C with modified polycarboxylic acid mother liquor and stir 0.5h, add all the other raw material stirring after cooling evenly, obtain efficient retarded concrete water reducer.
Adopt reference cement, as shown in the table to the concrete experiments result of above-mentioned obtained water reducer:
Table one: concrete mixture characteristic (the solid volume 0.5% of water reducer)
| Index | Air content | Compressive strength rate (28d) | Shrinkage ratio (28d) | Presetting period |
| Test result | 4.1% | 145% | 110% | 10h |
Carry out paste flowing degree test with above-mentioned obtained water reducer to the cement that difference forms, result is as follows:
Table two: the dispersiveness of water reducer in difference composition cement
| Cement type | Water reducer volume (%) | Initial flow degree (mm) | 1h degree of mobilization (mm) |
| Plain cement | 0.5 | 232 | 224 |
| Silt content 5% cement | 0.5 | 226 | 213 |
Claims (2)
1. an efficient retarded concrete water reducer, is characterized in that, it is obtained by the raw material of following weight parts:
Maltodextrin 2-4, polyvinyl alcohol 2-4, lauric acid amide of ethanol 0.3-0.5,20%-30% hydrogen peroxide 5-10, Tween-80 0.1-0.2, Xylitol 2-2.5, urea 2-4, Sunmorl N 60S 2-4, modified polycarboxylic acid mother liquor 40-50, water 40-50;
Described modified polycarboxylic acid mother liquor is made up of the raw material of following weight part: vinylformic acid 30-40, methyl methacrylate 10-15, poly glycol monomethyl ether 10-15, feather protein 3-5, carboxymethyl cellulose 3-5, Potassium Persulphate 0.5-1, water 100-150; The preparation method of modified polycarboxylic acid mother liquor be carboxymethyl cellulose, feather protein and Potassium Persulphate are added 1/2-2/3 amount water in 60-80 DEG C stir 0.5-1h obtain A liquid, all the other raw materials are mixed to obtain B liquid, then A liquid and B liquid are added 70-80 DEG C of stirring reaction 4-6h in reactor jointly, after cooling, pH is adjusted to 8-9, obtains final product.
2. the preparation method of a kind of efficient retarded concrete water reducer according to claim 1, is characterized in that, comprise the following steps:
(1) raw material is taken by weight, first Tween-80 and lauric acid amide of ethanol are added to the water and dissolve completely, then maltodextrin and polyvinyl alcohol 80-90 DEG C of stirring 1-2h is added, then temperature is adjusted to 50-60 DEG C, add 20%-30% hydrogen peroxide and stir 4-6h, after cooling, pH is adjusted to 7-8, obtains mixed solution;
(2) after being mixed with modified polycarboxylic acid mother liquor by the mixed solution in (1), 70-80 DEG C is stirred 0.5-1h, adds all the other raw material stirring evenly, obtain efficient retarded concrete water reducer after cooling.
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| CN201510887491.0A CN105384385A (en) | 2015-12-07 | 2015-12-07 | High-efficiency slow-setting concrete water reducer and preparation method thereof |
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| CN201510887491.0A CN105384385A (en) | 2015-12-07 | 2015-12-07 | High-efficiency slow-setting concrete water reducer and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110128050A (en) * | 2019-06-25 | 2019-08-16 | 广东汇强外加剂有限公司 | A kind of both sexes polycarboxylic acids room temperature synthesis technology |
| CN114315212A (en) * | 2021-11-18 | 2022-04-12 | 天津丰桥筑工住宅工业有限公司 | Retarding polycarboxylate superplasticizer, preparation method thereof and concrete |
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| CN103183794A (en) * | 2011-12-27 | 2013-07-03 | 山西黄腾化工有限公司 | Method for preparing polycarboxylic acid type water reducer by solid acid esterification |
| CN103359972A (en) * | 2013-07-26 | 2013-10-23 | 上海三瑞高分子材料有限公司 | Polycarboxylic acid water reducer for preparing fair-faced concrete |
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| CN103641358A (en) * | 2013-11-05 | 2014-03-19 | 上海市建筑构件制品有限公司 | A polycarboxylate-type intermediate-efficiency pumping aid used for premix commodity pump concrete |
| CN103664052A (en) * | 2013-11-29 | 2014-03-26 | 上海三瑞高分子材料有限公司 | Polycarboxylate superplasticizer for machine-made sand concrete |
| CN105036590A (en) * | 2015-07-20 | 2015-11-11 | 苏州市兴邦化学建材有限公司 | Modified polycarboxylate powder superplasticizer dedicated to flowable mortar |
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2015
- 2015-12-07 CN CN201510887491.0A patent/CN105384385A/en active Pending
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| CN103183794A (en) * | 2011-12-27 | 2013-07-03 | 山西黄腾化工有限公司 | Method for preparing polycarboxylic acid type water reducer by solid acid esterification |
| CN103359972A (en) * | 2013-07-26 | 2013-10-23 | 上海三瑞高分子材料有限公司 | Polycarboxylic acid water reducer for preparing fair-faced concrete |
| CN103466993A (en) * | 2013-09-29 | 2013-12-25 | 江苏名和集团有限公司 | Additive for pervious concrete and application thereof |
| CN103641358A (en) * | 2013-11-05 | 2014-03-19 | 上海市建筑构件制品有限公司 | A polycarboxylate-type intermediate-efficiency pumping aid used for premix commodity pump concrete |
| CN103664052A (en) * | 2013-11-29 | 2014-03-26 | 上海三瑞高分子材料有限公司 | Polycarboxylate superplasticizer for machine-made sand concrete |
| CN105036590A (en) * | 2015-07-20 | 2015-11-11 | 苏州市兴邦化学建材有限公司 | Modified polycarboxylate powder superplasticizer dedicated to flowable mortar |
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| 《混凝土外加剂》: "《混凝土外加剂》", 31 August 2003 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110128050A (en) * | 2019-06-25 | 2019-08-16 | 广东汇强外加剂有限公司 | A kind of both sexes polycarboxylic acids room temperature synthesis technology |
| CN114315212A (en) * | 2021-11-18 | 2022-04-12 | 天津丰桥筑工住宅工业有限公司 | Retarding polycarboxylate superplasticizer, preparation method thereof and concrete |
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Application publication date: 20160309 |