CN105985054A - Efficient water reducing agent for improving frost resistance and dispersibility of concrete - Google Patents
Efficient water reducing agent for improving frost resistance and dispersibility of concrete Download PDFInfo
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- CN105985054A CN105985054A CN201610025646.4A CN201610025646A CN105985054A CN 105985054 A CN105985054 A CN 105985054A CN 201610025646 A CN201610025646 A CN 201610025646A CN 105985054 A CN105985054 A CN 105985054A
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- reducing agent
- sodium
- water reducing
- deionized water
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an efficient water reducing agent for improving the frost resistance and the dispersibility of concrete. The efficient water reducing agent comprises, by weight, 240-250 parts of methyl-2-buten polyoxyethylene ether, 25.2-26.0 parts of acrylic acid, 1.6-1.65 parts of ammonium persulfate, 0.53-0.55 part of thioglycolic acid, 13-14 parts of lignin, an appropriate quantity of sodium hydroxide solution with the concentration of 10 wt%, an appropriate quantity of deionized water, 26-28 parts of graphene oxide, 0.8-1 part of sodium pyrithione, 6-8 parts of waste carbon fiber yarns, 3-4 parts of methyl celluloses, 2-3 parts of ethylene glycol, 9-11 parts of porous calcium phosphate, 1.2-1.5 parts of sodium abietate and 1-1.3 parts of sodium dodecyl sulfate. The efficient water reducing agent has the advantages that carbon fibers are added into a water reducing agent under the effects of dispersing agents during preparation and are matched with added components such as the ethylene glycol and the sodium abietate, and accordingly the strength, the dispersibility, the frost resistance and the corrosion resistance of the concrete can be improved.
Description
Technical field
The present invention relates to technical field of concrete additives, particularly relate to a kind of high efficiency water reducing agent improving concrete frost resistance dispersibility.
Background technology
Polycarboxylate high performance water-reducing agent, as the important composition material of preparation high performance concrete, the guarantor outstanding advantages such as plasticity good, shrinkage factor low, high performance potentiality big high by its water-reducing rate, is widely used in the key projects such as high ferro, bridge, nuclear power, water power.But, polycarboxylate high performance water-reducing agent mother solution performance is the most single, it is impossible to meet different engineering field, the concrete of different performance requirement, greatly constrains extensively application and the development of polycarboxylate high performance water-reducing agent.Experts and scholars have carried out relatively systematic research by chemically and physically modified method to polycarboxylate high performance water-reducing agent both at home and abroad, achieve gratifying achievement.But these researchs are concentrated mainly on the performance improving polycarboxylate high performance water-reducing agent in a certain respect, such as spacetabs type, Xu are put type and utilize inexpensive monomers synthesis fall low-cost type, and the aspect such as multicomponent physics is compound, bring inconvenience so to compounding unit and construction enterprises, in use easily cause quality accident.
" experimental study of organic amine modified polycarboxylic acid series high-performance dehydragent " literary composition is for the problems referred to above the achievement in research that combines domestic and international expert, the polycarboxylate high performance water-reducing agent using organic amine to produce different manufacturers has carried out physics, chemical modification, the adaptability of cement is greatly improved by modified polycarboxylate high performance water-reducing agent, and the engineering that a kind of mother solution can be suitable for different requirement uses, it is achieved that the high performance of polycarboxylate high performance water-reducing agent mother solution, multifunction.But easily occur that bleeding, isolation, intensity are low, easily the problems such as crack occur when producing concrete, have impact on the use of water reducer, article does not illustrate for these shortcomings, need to be modified further.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of high efficiency water reducing agent improving concrete frost resistance dispersibility.
The present invention is achieved by the following technical solutions:
A kind of high efficiency water reducing agent improving concrete frost resistance dispersibility, is made up of the raw material of following weight portion: isopentenol polyoxyethylene ether 240-250, acrylic acid 25.2-26.0, Ammonium persulfate. 1.6-1.65, TGA 0.53-0.55, lignin 13-14, concentration are that the sodium hydroxide solution of 10wt% is appropriate, deionized water appropriate, graphene oxide 26-28, sodium pyrithione 0.8-1, carbon fiber waste-filament 6-8, methylcellulose 3-4, ethylene glycol 2-3, porous calcium phosphate 9-11, sodium abietate 1.2-1.5, dodecyl sodium sulfate 1-1.3.
Described a kind of high efficiency water reducing agent improving concrete frost resistance dispersibility, is made up of step in detail below:
(1) graphene oxide will add the deionized water of 4-5 times amount, put in ultrasonator ultrasonic 30-40 minute until being uniformly dispersed, then graphene oxide dispersion being put in the water-bath of 60-80 DEG C and heat, be slowly added to lignin, it is stand-by that dispersed with stirring forms mixture the most afterwards；
(2) reactor will add isopentenol polyoxyethylene ether, appropriate amount of deionized water, warming while stirring disposably adds Ammonium persulfate. after 60-70 DEG C, then be slowly added dropwise acrylic acid, mixture that TGA, step (1) obtain, control dripped complete in 3-3.5 hour, continue insulation reaction 60-90 minute, finally dripping the sodium hydroxide solution that concentration is 10wt% to be neutralized, regulation pH value is neutral, and solid content controls at 40%-45%；
(3) clean carbon fiber waste-filament to put in baking oven and dry with the temperature of 90-100 DEG C, be cut into short silk after cooling stand-by；By methylcellulose adds the deionized water of 5-7 times amount, it is sufficiently stirred for being formed swelling colloid solution, afterwards short for above-mentioned carbon fiber silk is added thereto, be formed uniformly suspension with the speed dispersed with stirring of 600-800 rev/min；Dodecyl sodium sulfate is dissolved in the deionized water of 3-4 times amount formation solution, porous calcium phosphate, sodium abietate are put in batch mixer, stir 10-15 minute with the speed of 500-600 rev/min, it is subsequently adding above-mentioned solution, continue stirring 15-20 minute, discharging, puts into the temperature drying with 70-80 DEG C in baking oven, grinds and obtain mixed-powder；Being added in above-mentioned suspension by mixed-powder, continuously add remaining residual components, the speed dispersed with stirring with 500-600 rev/min is uniform；
(4) step (2) product is mixed with step (3) product, put in stirred tank, stir mixing with the speed of 600-800 rev/min and be uniformly dispersed and get final product.
The invention have the advantage that the present invention is by controlling the proportioning of isopentenol polyoxyethylene ether and acrylic monomers, thus prepare the water reducer with good dispersion, by polyreaction, lignin, graphene oxide are grafted in polyether-type water reducer molecule, the bleeding of water reducer can be reduced, improve graphene oxide dispersion in cement mortar simultaneously, microstructure to cement mortar has preferable regulating and controlling effect, concrete is played the effect of activeness and quietness, it is possible to improve the paste flowing degree of cement further.
Carbon fiber is joined in the preparation of water reducer by the present invention by the effect of dispersant, coordinate the interpolation of the composition such as ethylene glycol, sodium abietate, the intensity of concrete, dispersibility can not only be improved, the anti-freezing property of concrete, decay resistance can be improved simultaneously, the water reducer made not only possesses good combination property, and reduces production cost.
Detailed description of the invention
A kind of high efficiency water reducing agent improving concrete frost resistance dispersibility, is made up of the raw material of following weight portion (kilogram): isopentenol polyoxyethylene ether 240, acrylic acid 25.2, Ammonium persulfate. 1.6, TGA 0.53, lignin 13, concentration are that the sodium hydroxide solution of 10wt% is appropriate, deionized water appropriate, graphene oxide 26, sodium pyrithione 0.8, carbon fiber waste-filament 6, methylcellulose 3, ethylene glycol 2, porous calcium phosphate 9, sodium abietate 1.2, dodecyl sodium sulfate 1.
Described a kind of high efficiency water reducing agent improving concrete frost resistance dispersibility, is made up of step in detail below:
(1) graphene oxide will add the deionized water of 4 times amount, put in ultrasonator ultrasonic 30 minutes until being uniformly dispersed, then graphene oxide dispersion being put in the water-bath of 60 DEG C and heat, be slowly added to lignin, it is stand-by that dispersed with stirring forms mixture the most afterwards；
(2) reactor will add isopentenol polyoxyethylene ether, appropriate amount of deionized water, warming while stirring disposably adds Ammonium persulfate. after 60 DEG C, then be slowly added dropwise acrylic acid, mixture that TGA, step (1) obtain, control dripped complete in 3 hours, continue insulation reaction 60 minutes, finally dripping the sodium hydroxide solution that concentration is 10wt% to be neutralized, regulation pH value is neutral, and solid content controls 40%%；
(3) clean carbon fiber waste-filament to put in baking oven and dry with the temperature of 90 DEG C, be cut into short silk after cooling stand-by；Methylcellulose will add the deionized water of 5 times amount, be sufficiently stirred for being formed swelling colloid solution, afterwards short for above-mentioned carbon fiber silk be added thereto, be formed uniformly suspension with the speed dispersed with stirring of 600 revs/min；Dodecyl sodium sulfate is dissolved in the deionized water of 3 times amount formation solution, porous calcium phosphate, sodium abietate are put in batch mixer, stir 10 minutes with the speed of 500 revs/min, it is subsequently adding above-mentioned solution, continue stirring 15 minutes, discharging, puts into the temperature drying with 70 DEG C in baking oven, grinds and obtain mixed-powder；Being added in above-mentioned suspension by mixed-powder, continuously add remaining residual components, the speed dispersed with stirring with 500 revs/min is uniform；
(4) step (2) product is mixed with step (3) product, put in stirred tank, stir mixing with the speed of 600 revs/min and be uniformly dispersed and get final product.
The water reducer excellent product performance that the present invention prepares, water-reducing rate is up to 26.8%, and bleeding rate is 28.1%, volume of the present invention is cement consumption 1%, in the case of the identical ratio of mud compared with using ordinary water-reducing agent, the slump can be made to improve more than 15cm, comprcssive strength improves more than 18%.
Claims (2)
1. the high efficiency water reducing agent improving concrete frost resistance dispersibility, it is characterized in that, be made up of the raw material of following weight portion: isopentenol polyoxyethylene ether 240-250, acrylic acid 25.2-26.0, Ammonium persulfate. 1.6-1.65, TGA 0.53-0.55, lignin 13-14, concentration are that the sodium hydroxide solution of 10wt% is appropriate, deionized water appropriate, graphene oxide 26-28, sodium pyrithione 0.8-1, carbon fiber waste-filament 6-8, methylcellulose 3-4, ethylene glycol 2-3, porous calcium phosphate 9-11, sodium abietate 1.2-1.5, dodecyl sodium sulfate 1-1.3.
A kind of high efficiency water reducing agent improving concrete frost resistance dispersibility, it is characterised in that be made up of step in detail below:
(1) graphene oxide will add the deionized water of 4-5 times amount, put in ultrasonator ultrasonic 30-40 minute until being uniformly dispersed, then graphene oxide dispersion being put in the water-bath of 60-80 DEG C and heat, be slowly added to lignin, it is stand-by that dispersed with stirring forms mixture the most afterwards；
(2) reactor will add isopentenol polyoxyethylene ether, appropriate amount of deionized water, warming while stirring disposably adds Ammonium persulfate. after 60-70 DEG C, then be slowly added dropwise acrylic acid, mixture that TGA, step (1) obtain, control dripped complete in 3-3.5 hour, continue insulation reaction 60-90 minute, finally dripping the sodium hydroxide solution that concentration is 10wt% to be neutralized, regulation pH value is neutral, and solid content controls at 40%-45%；
(3) clean carbon fiber waste-filament to put in baking oven and dry with the temperature of 90-100 DEG C, be cut into short silk after cooling stand-by；By methylcellulose adds the deionized water of 5-7 times amount, it is sufficiently stirred for being formed swelling colloid solution, afterwards short for above-mentioned carbon fiber silk is added thereto, be formed uniformly suspension with the speed dispersed with stirring of 600-800 rev/min；Dodecyl sodium sulfate is dissolved in the deionized water of 3-4 times amount formation solution, porous calcium phosphate, sodium abietate are put in batch mixer, stir 10-15 minute with the speed of 500-600 rev/min, it is subsequently adding above-mentioned solution, continue stirring 15-20 minute, discharging, puts into the temperature drying with 70-80 DEG C in baking oven, grinds and obtain mixed-powder；Being added in above-mentioned suspension by mixed-powder, continuously add remaining residual components, the speed dispersed with stirring with 500-600 rev/min is uniform；
(4) step (2) product is mixed with step (3) product, put in stirred tank, stir mixing with the speed of 600-800 rev/min and be uniformly dispersed and get final product.
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| CN201610025646.4A CN105985054A (en) | 2016-01-15 | 2016-01-15 | Efficient water reducing agent for improving frost resistance and dispersibility of concrete |
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| CN201610025646.4A CN105985054A (en) | 2016-01-15 | 2016-01-15 | Efficient water reducing agent for improving frost resistance and dispersibility of concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110395937A (en) * | 2019-07-16 | 2019-11-01 | 江苏博思通新材料有限公司 | A kind of concrete antifreezing water-reducing agent |
| CN111995270A (en) * | 2020-08-25 | 2020-11-27 | 湖州市菱湖三狮水泥有限公司 | Anti-freezing composite cement and preparation method thereof |
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| CN102515614A (en) * | 2011-12-29 | 2012-06-27 | 洛阳理工学院 | High-performance cement concrete polycarboxylic liquid antifreezer |
| CN104386945A (en) * | 2014-10-31 | 2015-03-04 | 安徽省阜南绿原化工有限公司 | Anti-freezing water reducer capable of improving flowability of concrete and preparation method of anti-freezing water reducer |
| CN104788629A (en) * | 2014-12-17 | 2015-07-22 | 厦门路桥翔通建材科技有限公司 | Polycarboxylate water-reducing agent and normal-temperature preparation method thereof |
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2016
- 2016-01-15 CN CN201610025646.4A patent/CN105985054A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515614A (en) * | 2011-12-29 | 2012-06-27 | 洛阳理工学院 | High-performance cement concrete polycarboxylic liquid antifreezer |
| CN104386945A (en) * | 2014-10-31 | 2015-03-04 | 安徽省阜南绿原化工有限公司 | Anti-freezing water reducer capable of improving flowability of concrete and preparation method of anti-freezing water reducer |
| CN104788629A (en) * | 2014-12-17 | 2015-07-22 | 厦门路桥翔通建材科技有限公司 | Polycarboxylate water-reducing agent and normal-temperature preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110395937A (en) * | 2019-07-16 | 2019-11-01 | 江苏博思通新材料有限公司 | A kind of concrete antifreezing water-reducing agent |
| CN111995270A (en) * | 2020-08-25 | 2020-11-27 | 湖州市菱湖三狮水泥有限公司 | Anti-freezing composite cement and preparation method thereof |
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