CN105985051A - Efficient water reducing agent with additional modified starch and function of improving performance of concrete - Google Patents
Efficient water reducing agent with additional modified starch and function of improving performance of concrete Download PDFInfo
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- CN105985051A CN105985051A CN201610025631.8A CN201610025631A CN105985051A CN 105985051 A CN105985051 A CN 105985051A CN 201610025631 A CN201610025631 A CN 201610025631A CN 105985051 A CN105985051 A CN 105985051A
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- Prior art keywords
- reducing agent
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- water reducing
- acrylic acid
- efficient 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
-
- 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 with additional modified starch and a function of improving the performance 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 rosin glycerin ester, 3-4 parts of sodium gluconate, 5.5-6.5 parts of acrylic acid grafted starch, 0.7-0.8 part of sodium polyacrylate, 9-11 parts of datolite powder and 2-2.5 parts of vulcanized castor oil. The efficient water reducing agent has the advantage that the acrylic acid grafted starch is added into the efficient water reducing agent in preparation procedures, accordingly, water films with dispersion effects can be formed near cement particles in water reducing service procedures, the dispersibility of the efficient water reducing agent in cement can be improved, and the water reducing ratio can be increased.
Description
Technical field
The present invention relates to technical field of concrete additives, particularly relate to the high efficiency water reducing agent of a kind of improved concrete performance adding modified starch.
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 the high efficiency water reducing agent of a kind of improved concrete performance adding modified starch.
The present invention is achieved by the following technical solutions:
The high efficiency water reducing agent of a kind of improved concrete performance adding modified starch, 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, rosin glyceride 0.8-1, sodium gluconate 3-4, acrylic acid grafted starch 5.5-6.5, sodium polyacrylate 0.7-0.8, datolite powder 9-11, sulfurized castor oil 2-2.5.
The high efficiency water reducing agent of described a kind of improved concrete performance adding modified starch, 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) sodium polyacrylate is dissolved in the deionized water of 25-30 times amount, add datolite powder, stir with the speed of 500-600 rev/min, continuously add acrylic acid grafted starch, remaining residual components is added after being heated to 50-60 DEG C of continuation stirring 40-50 minute, improve rotating speed to 1000-1200 rev/min, stir 20-30 minute；
(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.
The present invention also added acrylic acid grafted starch in preparation process, during using water reducer, the carboxylic group of acrylic acid side chain can interact with cement, starch chain can provide space steric effect, hydrophilic hydroxyl groups contained in starch, can be formed about the moisture film with peptizaiton at cement granules, water reducer powder dispersibility in cement can be improved, thus improve water-reducing rate, reduce cement consumption, save industrial cost.
Detailed description of the invention
The high efficiency water reducing agent of a kind of improved concrete performance adding modified starch, 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, rosin glyceride 0.8, sodium gluconate 3, acrylic acid grafted starch 5.5, sodium polyacrylate 0.7, datolite powder 9, sulfurized castor oil 2.
The high efficiency water reducing agent of described a kind of improved concrete performance adding modified starch, 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) sodium polyacrylate is dissolved in the deionized water of 25 times amount, adds datolite powder, stir with the speed of 500 revs/min, continuously add acrylic acid grafted starch, add remaining residual components after being heated to 50 DEG C of continuation stirrings 40 minutes, improve rotating speed to 1000 revs/min, stir 20 minutes；
(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 28.8%, and bleeding rate is 29.1%, 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 of the improved concrete performance adding modified starch, it is characterized in that, it 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 is that the sodium hydroxide solution of 10wt% is appropriate, deionized water is appropriate, graphene oxide 26-28, rosin glyceride 0.8-1, sodium gluconate 3-4, acrylic acid grafted starch 5.5-6.5, sodium polyacrylate 0.7-0.8, datolite powder 9-11, sulfurized castor oil 2-2.5.
The high efficiency water reducing agent of a kind of improved concrete performance adding modified starch, 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) sodium polyacrylate is dissolved in the deionized water of 25-30 times amount, add datolite powder, stir with the speed of 500-600 rev/min, continuously add acrylic acid grafted starch, remaining residual components is added after being heated to 50-60 DEG C of continuation stirring 40-50 minute, improve rotating speed to 1000-1200 rev/min, stir 20-30 minute；
(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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610025631.8A CN105985051A (en) | 2016-01-15 | 2016-01-15 | Efficient water reducing agent with additional modified starch and function of improving performance of concrete |
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| CN201610025631.8A CN105985051A (en) | 2016-01-15 | 2016-01-15 | Efficient water reducing agent with additional modified starch and function of improving performance of concrete |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106519049A (en) * | 2016-10-11 | 2017-03-22 | 常州市鼎日环保科技有限公司 | Preparation method of biomass concrete additive |
| CN106637262A (en) * | 2016-12-15 | 2017-05-10 | 天长市润达金属防锈助剂有限公司 | Chelating type cleaning agent with added modified starch for metal surface |
| CN107265904A (en) * | 2017-06-07 | 2017-10-20 | 常州市丰瑞电子有限公司 | A kind of preparation method of the composite sulfonated water reducer of lignin/starch base |
| CN111423540A (en) * | 2020-06-01 | 2020-07-17 | 玉林师范学院 | Acrylic acid grafted starch modified copolymer water reducing agent and preparation method thereof |
| CN111574636A (en) * | 2019-06-12 | 2020-08-25 | 郑秀旗 | Starch maleate, preparation method and application thereof |
| CN111592263A (en) * | 2019-02-21 | 2020-08-28 | 天水师范学院 | Synthesis process and device of retarding polycarboxylate superplasticizer |
| CN115093514A (en) * | 2022-07-22 | 2022-09-23 | 小飞鱼高新科技发展有限公司 | High-efficiency environment-friendly water reducing agent suitable for mortar and premixed concrete and preparation method thereof |
| CN116355106A (en) * | 2023-05-31 | 2023-06-30 | 北京慕湖外加剂有限公司 | Preparation method of starch-based water reducer |
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| 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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| 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 (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106519049A (en) * | 2016-10-11 | 2017-03-22 | 常州市鼎日环保科技有限公司 | Preparation method of biomass concrete additive |
| CN106637262A (en) * | 2016-12-15 | 2017-05-10 | 天长市润达金属防锈助剂有限公司 | Chelating type cleaning agent with added modified starch for metal surface |
| CN107265904A (en) * | 2017-06-07 | 2017-10-20 | 常州市丰瑞电子有限公司 | A kind of preparation method of the composite sulfonated water reducer of lignin/starch base |
| CN111592263A (en) * | 2019-02-21 | 2020-08-28 | 天水师范学院 | Synthesis process and device of retarding polycarboxylate superplasticizer |
| CN111574636A (en) * | 2019-06-12 | 2020-08-25 | 郑秀旗 | Starch maleate, preparation method and application thereof |
| CN111574636B (en) * | 2019-06-12 | 2023-02-17 | 郑秀旗 | Starch maleate, preparation method and application thereof |
| CN111423540A (en) * | 2020-06-01 | 2020-07-17 | 玉林师范学院 | Acrylic acid grafted starch modified copolymer water reducing agent and preparation method thereof |
| CN115093514A (en) * | 2022-07-22 | 2022-09-23 | 小飞鱼高新科技发展有限公司 | High-efficiency environment-friendly water reducing agent suitable for mortar and premixed concrete and preparation method thereof |
| CN116355106A (en) * | 2023-05-31 | 2023-06-30 | 北京慕湖外加剂有限公司 | Preparation method of starch-based water reducer |
| CN116355106B (en) * | 2023-05-31 | 2023-08-08 | 北京慕湖外加剂有限公司 | Preparation method of starch-based water reducer |
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Application publication date: 20161005 |