CN104003647A - Copolymer-modified reaction-type air-entraining agent and preparation method thereof - Google Patents
Copolymer-modified reaction-type air-entraining agent and preparation method thereof Download PDFInfo
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- CN104003647A CN104003647A CN201410211758.XA CN201410211758A CN104003647A CN 104003647 A CN104003647 A CN 104003647A CN 201410211758 A CN201410211758 A CN 201410211758A CN 104003647 A CN104003647 A CN 104003647A
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Abstract
The invention discloses a copolymer-modified reaction-type air-entraining agent and a preparation method thereof. The air-entraining agent is prepared through following steps: mixing an air-entraining component with water with stirring uniformly, then adding a thickening component with stirring uniformly, and finally adding a foam-stabilizing component with stirring uniformly. The air-entraining agent comprises, by weight, 20.0-30.0% of the air-entraining component, 1.0-5.0% of the foam-stabilizing component, 10.0-15.0% of the thickening component and 50-69% of water. With the air-entraining agent, a concrete workability is significantly improved, a water-retaining property of concrete is enhanced, and an anti-separation capability and an anti-water-bleeding capability of the concrete is enhanced. A problem of poor wrapping performance of the concrete is solved.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of preparation method of copolymer-modified response type air entrapment agent.
Background technology
Air entrapment agent is that a kind of can introducing in concrete-agitating is uniformly distributed admixture stable and sealing micro-bubble in a large number.Construction practices explanation both at home and abroad, mixes air entrapment agent and not only can greatly improve concrete workability, water-retentivity in concrete, the more important thing is and have irreplaceable effect to improving the endurance qualities such as concrete antifreezing, impervious, anti-carbonization.In ready mixed concrete, introduce suitable bubble, can effectively reduce slump-loss, improve concrete pumpability simultaneously.The great technical economic benefit of air entrapment agent is familiar with by people, and therefore, in the concrete construction technology specification of many countries, all requirement must be mixed air entrapment agent.
Patent 200810117752.0 discloses a kind of cement concrete air entraining agent and preparation method thereof, be to adopt commercially available one, two or three grade of common rosin powder and commercially available technical grade sodium hydroxide, potassium permanganate, hydrogen peroxide, sulfuric acid and tap water, form through 60 DEG C～90 DEG C heated and stirred reactions.Wherein raw material used is by weight ratio: rosin 5～30 weight parts, sodium hydroxide solution 1～20 weight part, potassium permanganate solution 0～20 weight part, hydrogen peroxide solution 0～20 weight part, sulphuric acid soln 0～20 weight part, polymer solution in water 60～90 weight parts.The air entrapment agent bubble exquisiteness of this invention preparation, bubble stability is good, can be used in the material of construction such as sand-cement slurry or concrete.
Patent 200910016321.X discloses a kind of preparation method of concrete air-entrainer, and the concrete air-entrainer of proposition is made up of sodium lauroyl sareosine, lauric acid amide of ethanol, polyoxyethylene glycol, gelatine.The air entrapment agent of preparation has the advantages that foaming effect is good, bubble is even, foam is stable, has the performance of improving concrete workability, pumpability and reducing bleeding.This invention can be widely used in the concrete workses such as Steel Concrete, civil structure, highway, bridge, building construction.
Patent 201010273777.7 discloses a kind of concrete air-entrainer and preparation method thereof, a certain proportion of unsaturated terpenes, unsaturated fatty acids, unsaturated acid anhydride and initiator are dropped in reactor, there is free radical heat polymerization and esterification under certain condition, in the aqueous solution, carry out saponification reaction with alkali afterwards, finally obtain having the superpolymer of certain molecular weight, in its molecular structure, there is the long carbocyclic aliphatic chain of hydrophilic carboxyl and ester group, hydrophobic and there is the ring-type carbon-chain structure of certain space steric effect.This air entrapment agent and other composition of concrete admixture performances are good, introduce bubble evenly tiny, bubble stability is high, for the concrete works high to life requirement, as highway, railway, bridge, tunnel, hydro project etc., can improve concrete workability and sclerosis endurance quality.
Obviously, principle, traditional air entrapment agent is mainly tensio-active agent, can effectively reduce liquid phase surface tension, force in whipping process because liquid phase surface tension is lower at concrete, can introduce a large amount of bubbles, the size of bubble and degree of stability and surface tension, bleed kind, liquid composition are closely related.But in actual application, often wayward air content, the grinding aid in water reducer, retardant and cement all can affect its bleed effect.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned existing and a kind of copolymer-modified response type air entrapment agent and preparation method thereof is provided, utilize the alkaline environment of hydrated cementitious, discharge a small amount of gas, by the effect of thickening material, suds-stabilizing agent, in cement slurry, form stable micro-bubble, play the effect that improves concrete workability.
The present invention solves the problems of the technologies described above adopted technical scheme: copolymer-modified response type air entrapment agent, and it is for following component is through mixing, and described component and component concentration thereof are:
Bleed component: 20.0-30.0wt%, surely steep component: 1.0-5.0wt%, thickening component: 10.0-15.0wt%, water: 50-69wt%.
Press such scheme, described bleed component is one or more the mixing in ammonium sulfate, primary ammonium phosphate, ammonium chloride, ammonium acetate.
Press such scheme, described steady bubble component is one or more the mixing in methyl cellulose ether, hydroxyethyl ether cellulose, hydroxypropylcelluloether ether.
Press such scheme, described thickening component is the multipolymer of vinylformic acid and Hydroxyethyl Acrylate, and its molecular structure is as follows:
Wherein m=58-580, n=58-580, its molecular-weight average is 10000-100000.
Press such scheme, the concrete preparation method of described vinylformic acid and the multipolymer of Hydroxyethyl Acrylate is: vinylformic acid, Hydroxyethyl Acrylate and water, in mass ratio for 1:1:8 is placed in reactor, are stirred; Then add ammonium persulphate, continue to stir 3 hours, described ammonium persulphate consumption is 2% of vinylformic acid and Hydroxyethyl Acrylate total mass.
The preparation method of described copolymer-modified response type air entrapment agent, by bleed component and the first mixing and stirring of water, and then add thickening component to stir, finally add steady bubble component to stir, its component concentration is bleed component: 20.0-30.0wt%, surely steeps component: 1.0-5.0wt%, thickening component: 10.0-15.0wt%, water: 50-69wt%.
Know-why of the present invention: hydrated cementitious is strong basicity environment, pH=13 left and right.And in alkaline environment, ammonium salt is combined with OH-and can be generated a small amount of ammonia molecule.Under the condition that ammonia molecule exists in thickening component and steady bubble component, form stable micro-bubble, thereby there is good bleed effect.
The present invention compares with technique with like product, has advantages of following main:
1, air entrapment agent of the present invention and water reducer are mixed again in cement concrete, can significantly improve concrete workability, improve its parcel property, increase pumpability, can be used as subsidiary material and are widely used in concrete admixture field;
2, the air entrapment agent amount of air entrainment that prepared by the present invention is stable, is not subject to the impact of other chemical compositions;
3, preparation process of the present invention is simple, and without heating, reaction time is short, non-environmental-pollution.
Embodiment:
For illustrating further content of the present invention, exemplify especially following examples the present invention is described in further detail.Embodiment provides in the mode of explanation, but is never only confined to content of the present invention.Protection scope of the present invention is as the criterion with claim specification sheets.
Embodiment 1-6
Proportioning is as shown in table 1, and specific implementation process is as follows:
1) by bleed component and the first mixing and stirring of water, and then add thickening component to stir, then add steady bubble component to stir, obtain homogeneous solution, be response type air entrapment agent of the present invention.
Table 1 embodiment material mixture ratio
| Numbering | Bleed component | Steady bubble component | Thickening component | Water | Add up to |
| 1 | 20 | 1 | 10 | 69 | 100 |
| 2 | 30 | 5 | 15 | 50 | 100 |
| 3 | 25 | 3 | 12 | 60 | 100 |
| 4 | 25 | 2 | 12 | 61 | 100 |
| 5 | 25 | 3 | 12 | 60 | 100 |
| 6 | 20 | 2 | 12 | 66 | 100 |
Bleed component: be for No. 1-2 ammonium sulfate; Be for No. 3-4 ammonium sulfate, primary ammonium phosphate mixture, mass ratio is 1:1; Be for No. 4-6 the mixture of primary ammonium phosphate, ammonium chloride, ammonium acetate, mass ratio is 1:1:1.
Steady bubble component: being for No. 1-3 methyl cellulose ether, is for No. 3-6 mixture of hydroxyethyl ether cellulose, hydroxypropylcelluloether ether, and mass ratio is 1:1.
Thickening component: vinylformic acid, Hydroxyethyl Acrylate, water (mass ratio is 1:1:8) are placed in to reactor, stir; Then add ammonium persulphate (vinylformic acid and Hydroxyethyl Acrylate quality 2%), continue to stir 3 hours, molecular-weight average is 50000.
The evaluation of the product to above 6 embodiment:
Carry out concrete test with reference to GB50080-2002 " normal concrete mix performance test standard ", result is as shown in table 2, and response type air entrapment agent prepared by the present invention can significantly improve concrete workability, improves fluidity of slurry.
Table 2 concrete mix
Claims (10)
1. copolymer-modified response type air entrapment agent, it is for following component is through mixing, and described component and component concentration thereof are:
Bleed component: 20.0-30.0wt%, surely steep component: 1.0-5.0wt%, thickening component: 10.0-15.0wt%, water: 50-69wt%.
2. copolymer-modified response type air entrapment agent according to claim 1, is characterized in that: described bleed component is one or more the mixing in ammonium sulfate, primary ammonium phosphate, ammonium chloride, ammonium acetate.
3. copolymer-modified response type air entrapment agent according to claim 1 and 2, is characterized in that: described steady bubble component is one or more the mixing in methyl cellulose ether, hydroxyethyl ether cellulose, hydroxypropylcelluloether ether.
4. copolymer-modified response type air entrapment agent according to claim 1 and 2, is characterized in that: described thickening component is the multipolymer of vinylformic acid and Hydroxyethyl Acrylate, and its molecular structure is as follows:
Wherein m=58-580, n=58-580, its molecular-weight average is 10000-100000.
5. copolymer-modified response type air entrapment agent according to claim 4, it is characterized in that: the concrete preparation method of described vinylformic acid and the multipolymer of Hydroxyethyl Acrylate is: vinylformic acid, Hydroxyethyl Acrylate and water, in mass ratio for 1:1:8 is placed in reactor, are stirred; Then add ammonium persulphate, continue to stir 3 hours, described ammonium persulphate consumption is 2% of vinylformic acid and Hydroxyethyl Acrylate total mass.
6. the preparation method of copolymer-modified response type air entrapment agent claimed in claim 1, by bleed component and the first mixing and stirring of water, and then add thickening component to stir, finally add steady bubble component to stir, its component concentration is bleed component: 20.0-30.0wt%, surely steeps component: 1.0-5.0wt%, thickening component: 10.0-15.0wt%, water: 50-69wt%.
7. the preparation method of copolymer-modified response type air entrapment agent according to claim 6, is characterized in that: described bleed component is one or more the mixing in ammonium sulfate, primary ammonium phosphate, ammonium chloride, ammonium acetate.
8. the preparation method of copolymer-modified response type air entrapment agent according to claim 6, is characterized in that: described steady bubble component is one or more the mixing in methyl cellulose ether, hydroxyethyl ether cellulose, hydroxypropylcelluloether ether.
9. the preparation method of copolymer-modified response type air entrapment agent according to claim 6, is characterized in that: thickening component is the multipolymer of vinylformic acid and Hydroxyethyl Acrylate, and its molecular structure is as follows:
Wherein m=58-580, n=58-580, its molecular-weight average is 10000-100000.
10. the preparation method of copolymer-modified response type air entrapment agent according to claim 6, it is characterized in that: the concrete preparation method of described thickening component is: vinylformic acid, Hydroxyethyl Acrylate and water, in mass ratio for 1:1:8 is placed in reactor, are stirred; Then add ammonium persulphate, continue to stir 3 hours, described ammonium persulphate consumption is 2% of vinylformic acid and Hydroxyethyl Acrylate total mass.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978468A (en) * | 2020-08-31 | 2020-11-24 | 武汉理工大学 | Reaction air-entraining thickening agent and preparation method thereof |
| CN111995284A (en) * | 2020-08-19 | 2020-11-27 | 南通市展成商品混凝土有限公司 | Concrete air-entraining agent and concrete formula using same |
| CN112062496A (en) * | 2020-07-31 | 2020-12-11 | 国网冀北电力有限公司 | Foam stabilizing thickener and preparation method thereof |
| CN113121147A (en) * | 2019-12-30 | 2021-07-16 | 江苏苏博特新材料股份有限公司 | Concrete air entraining agent with long-acting air entraining function and preparation method and application thereof |
| CN117383862A (en) * | 2023-10-13 | 2024-01-12 | 长沙千巽新材料科技有限公司 | Air entraining agent regulator and preparation method and application thereof |
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| US20050241539A1 (en) * | 2004-04-27 | 2005-11-03 | Wolfgang Hagen | Tile cement mortars using water retention agents |
| CN101580354A (en) * | 2009-06-12 | 2009-11-18 | 福建科之杰新材料有限公司 | Polycarboxylic retarding high-performance water reducing agent for preparing concrete of middle and low strength grade |
| CN101602584A (en) * | 2009-07-27 | 2009-12-16 | 武汉帅麟科技有限公司 | A kind of Pneumatic suspension mortar plasticizer for spraying |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050241539A1 (en) * | 2004-04-27 | 2005-11-03 | Wolfgang Hagen | Tile cement mortars using water retention agents |
| CN101580354A (en) * | 2009-06-12 | 2009-11-18 | 福建科之杰新材料有限公司 | Polycarboxylic retarding high-performance water reducing agent for preparing concrete of middle and low strength grade |
| CN101602584A (en) * | 2009-07-27 | 2009-12-16 | 武汉帅麟科技有限公司 | A kind of Pneumatic suspension mortar plasticizer for spraying |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113121147A (en) * | 2019-12-30 | 2021-07-16 | 江苏苏博特新材料股份有限公司 | Concrete air entraining agent with long-acting air entraining function and preparation method and application thereof |
| CN112062496A (en) * | 2020-07-31 | 2020-12-11 | 国网冀北电力有限公司 | Foam stabilizing thickener and preparation method thereof |
| CN112062496B (en) * | 2020-07-31 | 2023-02-03 | 国网冀北电力有限公司 | Foam stabilizing thickener and preparation method thereof |
| CN111995284A (en) * | 2020-08-19 | 2020-11-27 | 南通市展成商品混凝土有限公司 | Concrete air-entraining agent and concrete formula using same |
| CN111995284B (en) * | 2020-08-19 | 2022-05-03 | 南通市展成商品混凝土有限公司 | Concrete air-entraining agent and concrete formula using same |
| CN111978468A (en) * | 2020-08-31 | 2020-11-24 | 武汉理工大学 | Reaction air-entraining thickening agent and preparation method thereof |
| CN117383862A (en) * | 2023-10-13 | 2024-01-12 | 长沙千巽新材料科技有限公司 | Air entraining agent regulator and preparation method and application thereof |
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