CN105384383A - Alkyl ketene dimer/oxidized starch compound concrete water reducer and preparation method thereof - Google Patents
Alkyl ketene dimer/oxidized starch compound concrete water reducer and preparation method thereof Download PDFInfo
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- CN105384383A CN105384383A CN201510887446.5A CN201510887446A CN105384383A CN 105384383 A CN105384383 A CN 105384383A CN 201510887446 A CN201510887446 A CN 201510887446A CN 105384383 A CN105384383 A CN 105384383A
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Abstract
The invention discloses an alkyl ketene dimer/oxidized starch compound concrete water reducer. The alkyl ketene dimer/oxidized starch compound concrete water reducer is prepared from the following raw materials by weight: 3 to 5 parts of corn starch, 2 to 4 parts of polyvinyl alcohol, 1.5 to 2.5 parts of alkyl ketene dimer, 5 to 10 parts of hydrogen peroxide with a concentration of 20 to 30%, 2 to 4 parts of sodium bicarbonate, 0.1 to 0.2 part of polysorbate-80, 0.3 to 0.5 part of sodium dodecyl sulfate, 40 to 50 parts of modified polycarboxylate mother liquor, 1 to 2 parts of sodium tripolyphosphate 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 the compression resistance and fracture resistance of concrete, effectively improves impermeability, durability and anticorrosion performance of concrete, and has a high practical value.
Description
Technical field
The present invention relates to chemical assistant technical field, particularly relate to a kind of alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete 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.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete, it is obtained by the raw material of following weight parts:
W-Gum 3-5, polyvinyl alcohol 2-4, alkyl ketene dimer 1.5-2.5,20%-30% hydrogen peroxide 5-10, sodium bicarbonate 2-4, Tween-80 0.1-0.2, sodium lauryl sulphate 0.3-0.5, modified polycarboxylic acid mother liquor 40-50, tripoly phosphate sodium STPP 1-2, 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, again 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 alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete, comprises the following steps:
(1) raw material is taken by weight, first Tween-80 and sodium lauryl sulphate are added to the water and dissolve completely, then W-Gum and polyvinyl alcohol 80-90 DEG C of stirring 1-2h is added, then temperature is adjusted to 55-65 DEG C, add sodium bicarbonate, 20%-30% hydrogen peroxide and alkyl ketene dimer and stir 2-4h, 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 alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete 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, composite simultaneously by with alkyl ketene dimer/Sumstar 190 composite assistant, 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 can effectively promote concrete impermeability, weather resistance and Corrosion Protection, there is higher practical value.
Embodiment
A kind of alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete, it is obtained by the raw material of following weight parts:
W-Gum 3, polyvinyl alcohol 2, alkyl ketene dimer 1.5,20% hydrogen peroxide 5, sodium bicarbonate 2, Tween-80 0.1, sodium lauryl sulphate 0.3, modified polycarboxylic acid mother liquor 40, tripoly phosphate sodium STPP 1, 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, again 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 alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete, comprises the following steps:
(1) raw material is taken by weight, first Tween-80 and sodium lauryl sulphate are added to the water and dissolve completely, then W-Gum and polyvinyl alcohol 80 DEG C stirring 1h is added, then temperature is adjusted to 55 DEG C, add sodium bicarbonate, 20% hydrogen peroxide and alkyl ketene dimer and stir 2h, 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 alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete.
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) |
| Test result | 3.3% | 170% | 108% |
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 | 234 | 223 |
| Silt content 5% cement | 0.5 | 225 | 216 |
Claims (2)
1. alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete, is characterized in that, it is obtained by the raw material of following weight parts:
W-Gum 3-5, polyvinyl alcohol 2-4, alkyl ketene dimer 1.5-2.5,20%-30% hydrogen peroxide 5-10, sodium bicarbonate 2-4, Tween-80 0.1-0.2, sodium lauryl sulphate 0.3-0.5, modified polycarboxylic acid mother liquor 40-50, tripoly phosphate sodium STPP 1-2, 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, again 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 alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete according to claim 1, is characterized in that, comprise the following steps:
(1) raw material is taken by weight, first Tween-80 and sodium lauryl sulphate are added to the water and dissolve completely, then W-Gum and polyvinyl alcohol 80-90 DEG C of stirring 1-2h is added, then temperature is adjusted to 55-65 DEG C, add sodium bicarbonate, 20%-30% hydrogen peroxide and alkyl ketene dimer and stir 2-4h, 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 alkyl ketene dimer/Sumstar 190 composite water-reducing agent for concrete after cooling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510887446.5A CN105384383A (en) | 2015-12-07 | 2015-12-07 | Alkyl ketene dimer/oxidized starch compound concrete water reducer and preparation method thereof |
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| CN201510887446.5A CN105384383A (en) | 2015-12-07 | 2015-12-07 | Alkyl ketene dimer/oxidized starch compound concrete water reducer and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767952A (en) * | 2009-12-29 | 2010-07-07 | 天津市飞龙砼外加剂有限公司 | Polycarboxylic acid water reducing agent and preparation method thereof |
| 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 |
| 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 |
-
2015
- 2015-12-07 CN CN201510887446.5A patent/CN105384383A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767952A (en) * | 2009-12-29 | 2010-07-07 | 天津市飞龙砼外加剂有限公司 | Polycarboxylic acid water reducing agent and preparation method thereof |
| 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 |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 何廷树等: "《混凝土外加剂》", 31 August 2003, 陕西科学技术出版社 * |
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Application publication date: 20160309 |