CN105985047A - Modified polycarboxylate water reducer capable of improving strength of concrete - Google Patents
Modified polycarboxylate water reducer capable of improving strength of concrete Download PDFInfo
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- CN105985047A CN105985047A CN201610025725.5A CN201610025725A CN105985047A CN 105985047 A CN105985047 A CN 105985047A CN 201610025725 A CN201610025725 A CN 201610025725A CN 105985047 A CN105985047 A CN 105985047A
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- water reducer
- concrete
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- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
- C04B24/2647—Polyacrylates; Polymethacrylates containing polyether side chains
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
-
- 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)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a modified polycarboxylate water reducer capable of improving strength of concrete. The modified polycarboxylate water reducer is prepared from, by weight, 240-250 parts of TPEG, 25.2-26.0 parts of acrylic acid, 1.6-1.65 parts of ammonium persuflate, 0.53-0.55 parts of thioglycolic acid, 13-14 parts of lignin, proper amounts of sodium hydroxide solution of 10wt% in concentration and deionized water, 26-28 parts of grapheme oxide, 2.5-3 parts of sodium pyrophosphate, 2-3 parts of waterborne epoxy resin, 8-10 parts of nano alumina, 5-6 parts of carbide slag, 2-3 parts of microcrystalline wax and 3-4 parts of sodium citrate. The modified polycarboxylate water reducer is scientific and reasonable in ingredient proportion, the water reducer which is prepared from a series of processing steps is high in water reducing rate and good in dispersity in the concrete, early strength and later strength of the concrete are improved obviously, and the water reducer is excellent in working performance, high in durability and low in bleeding rate and has good economic benefit and social benefit.
Description
Technical field
The present invention relates to technical field of concrete additives, particularly relate to a kind of modified polycarboxylic acid water reducer that can improve concrete strength.
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 modified polycarboxylic acid water reducer that can improve concrete strength.
The present invention is achieved by the following technical solutions:
A kind of modified polycarboxylic acid water reducer that can improve concrete strength, 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 pyrophosphate 2.5-3, aqueous epoxy resins 2-3, nano aluminium oxide 8-10, carbide slag 5-6.5, microcrystalline wax 2-3, sodium citrate 3-4.
Described a kind of modified polycarboxylic acid water reducer that can improve concrete strength, 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) by carbide slag adds the deionized water of 5-6 times amount, agitation grinding 30-40 minute, slurry is formed stand-by；Being heated to microcrystalline wax softening, mix with nano aluminium oxide, insulation adds in above-mentioned slurry after grinding 15-20 minute, continuously adds remaining residual components, stir 30-40 minute with the speed of 500-600 rev/min after dispersed with stirring 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.
Present component proportioning is scientific and reasonable, and the water reducer water-reducing rate made by a series of processing step is high, good dispersion in concrete, significantly improve early stage and the later strength of concrete, excellent working performance, good endurance, bleeding rate is little, has good economic benefit and social benefit.
Detailed description of the invention
A kind of modified polycarboxylic acid water reducer that can improve concrete strength, 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 pyrophosphate 2.5, aqueous epoxy resins 2, nano aluminium oxide 8, carbide slag 5, microcrystalline wax 2, sodium citrate 3.
Described a kind of modified polycarboxylic acid water reducer that can improve concrete strength, 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) carbide slag will add the deionized water of 5 times amount, agitation grinding 30 minutes, form slurry stand-by；Being heated to microcrystalline wax softening, mix with nano aluminium oxide, insulation adds in above-mentioned slurry after grinding 15 minutes, continuously adds remaining residual components, stir 30 minutes with the speed of 500 revs/min after dispersed with stirring 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 29.5%, and bleeding rate is 26.1%, 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 modified polycarboxylic acid water reducer that can improve concrete strength, 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 pyrophosphate 2.5-3, aqueous epoxy resins 2-3, nano aluminium oxide 8-10, carbide slag 5-6.5, microcrystalline wax 2-3, sodium citrate 3-4.
A kind of modified polycarboxylic acid water reducer that can improve concrete strength, 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) by carbide slag adds the deionized water of 5-6 times amount, agitation grinding 30-40 minute, slurry is formed stand-by；Being heated to microcrystalline wax softening, mix with nano aluminium oxide, insulation adds in above-mentioned slurry after grinding 15-20 minute, continuously adds remaining residual components, stir 30-40 minute with the speed of 500-600 rev/min after dispersed with stirring 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610025725.5A CN105985047A (en) | 2016-01-15 | 2016-01-15 | Modified polycarboxylate water reducer capable of improving strength of concrete |
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| CN201610025725.5A CN105985047A (en) | 2016-01-15 | 2016-01-15 | Modified polycarboxylate water reducer capable of improving strength of concrete |
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| CN105985047A true CN105985047A (en) | 2016-10-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107572866A (en) * | 2017-08-22 | 2018-01-12 | 浙江省通用砂浆研究院 | A kind of preparation and application of the alkali-free anti-sag accelerator of environmentally friendly Machine-blasting mortar |
| CN109232830A (en) * | 2018-09-18 | 2019-01-18 | 科之杰新材料集团有限公司 | A kind of preparation method of concrete slump retaining type reinforcing agent |
| CN113174019A (en) * | 2021-05-21 | 2021-07-27 | 山西佳维新材料股份有限公司 | Water-based epoxy ester modified polycarboxylate superplasticizer and preparation method and application thereof |
| WO2022057067A1 (en) * | 2020-09-15 | 2022-03-24 | 科之杰新材料集团有限公司 | Modified polyol acrylate, shrinkage-reducing polycarboxylic acid water reducer and preparation method therefor |
| CN118108441A (en) * | 2024-01-31 | 2024-05-31 | 佛山市利宇达建材有限公司 | Viscosity-reducing type glue reducer for concrete and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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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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2016
- 2016-01-15 CN CN201610025725.5A patent/CN105985047A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
Non-Patent Citations (1)
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| 高党国等: ""氧化石墨烯与聚羧酸减水剂单体共聚物的制备与性能"", 《精细化工》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107572866A (en) * | 2017-08-22 | 2018-01-12 | 浙江省通用砂浆研究院 | A kind of preparation and application of the alkali-free anti-sag accelerator of environmentally friendly Machine-blasting mortar |
| CN107572866B (en) * | 2017-08-22 | 2020-08-25 | 浙江省通用砂浆研究院 | Preparation and application of alkali-free anti-sagging accelerator for environment-friendly machine-sprayed mortar |
| CN109232830A (en) * | 2018-09-18 | 2019-01-18 | 科之杰新材料集团有限公司 | A kind of preparation method of concrete slump retaining type reinforcing agent |
| CN109232830B (en) * | 2018-09-18 | 2022-01-04 | 科之杰新材料集团有限公司 | Preparation method of concrete slump-retaining reinforcing agent |
| WO2022057067A1 (en) * | 2020-09-15 | 2022-03-24 | 科之杰新材料集团有限公司 | Modified polyol acrylate, shrinkage-reducing polycarboxylic acid water reducer and preparation method therefor |
| CN113174019A (en) * | 2021-05-21 | 2021-07-27 | 山西佳维新材料股份有限公司 | Water-based epoxy ester modified polycarboxylate superplasticizer and preparation method and application thereof |
| CN118108441A (en) * | 2024-01-31 | 2024-05-31 | 佛山市利宇达建材有限公司 | Viscosity-reducing type glue reducer for concrete and preparation method thereof |
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Application publication date: 20161005 |