CN104496253B - Special early-strength polycarboxylate superplasticizer for prefabricated parts and preparation method of special early-strength polycarboxylate superplasticizer - Google Patents
Special early-strength polycarboxylate superplasticizer for prefabricated parts and preparation method of special early-strength polycarboxylate superplasticizer Download PDFInfo
- Publication number
- CN104496253B CN104496253B CN201410814989.XA CN201410814989A CN104496253B CN 104496253 B CN104496253 B CN 104496253B CN 201410814989 A CN201410814989 A CN 201410814989A CN 104496253 B CN104496253 B CN 104496253B
- Authority
- CN
- China
- Prior art keywords
- water reducer
- early strength
- high early
- strength poly
- acrylic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a special early-strength polycarboxylate superplasticizer for prefabricated parts. The special early-strength polycarboxylate superplasticizer is prepared by implementing copolymerization reaction on isopentenyl polyether and an acrylamide group monomer and acrylic polypropylene glycol monoester mixed solution together with dimethyl fumarate and a molecular weight modifier as well as an initiator. The special early-strength polycarboxylate superplasticizer disclosed by the invention is high in water reduction rate, high in early strength, relatively low in shrinkage rate, good in adaptability, free of formaldehyde pollution in the production process, and particularly applicable to prefabricated parts and cement products.
Description
Technical field
The present invention relates to a kind of special high early strength poly-carboxylic water reducer of prefabricated components, belong to concrete admixture field.
Background technology
Development recently as Important Project such as high ferro, subway, the south water to north and large-scale urbanization are built
If putting forward higher requirement to concrete admixture, especially coagulation including the pile tube of section of jurisdiction for the prefabricated components
Native component increases severely it is necessary to ensure that the durability of xoncrete structure.Therefore research to be adapted to precast concrete mixed to improve
Solidifying soil early strength, the Early-strength polycarboxylate superplasticizer of acceleration form cycling rate have very great meaning.
Polycarboxylate water-reducer is developed with swift and violent speed at home, though having reached the state such as Japanese, German
The level of outer water reducer.In precast concrete practical application, mostly adopt compound early-strength water reducer, though
So can solve to shorten the steam-cured time or exempt steam curing process, increase significant economic benefit, yet with not
The mechanism of action in concrete for the same component is also not quite similar, in terms of improving concrete while performance,
Also otherwise performance can be affected, be such as combined using triethanolamine and may improve the intensity of early stage but to the later stage
Concrete durability has certain impact.
Obtain again generally by using MOLECULE DESIGN high early strength poly-carboxylic water reducer in this problem, current industry
Performance preferably early strength water-reducing agent.Patent CN103467669 discloses a kind of high early strength poly-carboxylic water reducer with thiazolinyl
Polyoxyethylene ether, sulfonic acid and carboxylic acidss unsaturated monomer carry out polymerization preparation.Patent 103450412 and
CN103450408 discloses a kind of high early strength poly-carboxylic water reducer.All using containing carboxylic acid group, sulfonic acid and amide
Compound Deng group carries out radical polymerization and forms, but this technique productions is more complicated, and to concrete
Contractive effect is not good.
Content of the invention
The invention discloses a kind of special high early strength poly-carboxylic water reducer of prefabricated components, there is higher water-reducing rate and can
Application property, and process is simple, pollution-free in production process.
For achieving the above object, the present invention is achieved through the following technical solutions：
A kind of special high early strength poly-carboxylic water reducer of prefabricated components, with isopentene group polyethers, acrylamide based monomers with
And acrylic acid polytrimethylene glycol monoesters mixed liquor, it is aided with dimethyl fumarate and molecular weight regulator, add
Initiator carries out copolyreaction and makes.
The water reducer of the present invention, in preparation process, the consumption of water can be adjusted according to actual requirement of engineering, excellent
The solid content selecting this water reducer is 50%.
The water reducer of the present invention, using adding above-mentioned each raw material to make in water, the amount of material is gathered for isopentene group
Ether: acrylamide based monomers: acrylic acid polytrimethylene glycol monoesters mixed liquor: dimethyl fumarate: initiator:
Molecular weight regulator=1: (1.0～1.5): (3.0～4.0): (0.1～1.0): (0.1～0.5): (0.1～
0.5).
In the present invention, described isopentene group pfpe molecule amount is 400-3000, preferably 2000.
In the present invention, acrylamide based monomers include NIPA, n-methylolacrylamide,
One of 3- acrylamido phenylboric acid 2- acrylamide-2-methylpro panesulfonic acid or more than one mixed
Compound, participates in reaction by introducing amino group, increased substantial amounts of amide group on polymer molecular chain.
In the present invention, initiator include one of hydrogen peroxide, Ammonium persulfate., potassium peroxydisulfate or one kind with
On mixture, by add initiator induce initiated polymerization.
In the present invention, acrylic acid polytrimethylene glycol monoesters mixed liquor be by acrylic acid and polytrimethylene glycol with
And MPEG1000 in solvent-free state plus catalyst and polymerization inhibitor and heats and carries out according to mol ratio (6: 1.1: 1)
Back flow reaction is obtained.
It is typically heated to 120 DEG C or even higher temperature.
Wherein, described catalyst is p-methyl benzenesulfonic acid, and polymerization inhibitor is phenothiazine.
In the present invention, molecular weight regulator includes isopropanol, mercaptoethanol, sodium allylsulfonate and methyl
One of sodium allylsulfonate or more than one mixture.
Water reducer disclosed in this invention is by having carboxylic acid, amino, hydroxyl, polyoxyethylene groups and ester in structure
Group, is polymerized by the monomer of four species, has given full play to the synergism between each composition.
Accordingly, the invention discloses described high early strength poly-carboxylic water reducer preparation method, with methallyl ether,
Acrylamide based monomers and acrylic acid polytrimethylene glycol monoesters, are aided with dimethyl fumarate, molecular-weight adjusting
Agent, adds initiator, under 60-80 DEG C of temperature conditionss, adds initiator to carry out copolyreaction and is obtained.
Preferably, the response time of described copolyreaction is 4 hours, keeps preferable reactivity worth.
Further, also include step high early strength poly-carboxylic water reducer being adjusted by using alkaline conditioner
Suddenly, typically water reducer is adjusted to neutrality or close to neutral.
Compared with prior art, the water reducer of the present invention achieves following technological progress：
1. water-reducing rate is higher, has good dispersibility to concrete under relatively low volume, and to each department
Conventional cement all has good dispersibility.
2. product has concurrently and reduces performance and early epistasis energy, product stable storing, and early epistasis is high, and the low spy of shrinkage factor
Point, has certain agent on crack resistance of concrete cracking performance.
3. gradual loss is little, especially can meet the requirement of low slump retentivity.
4. air content is relatively low, can meet the construction requirement of various prefabricated components concrete.
5. pollution-free in production process, belong to environment-friendly products.
Specific embodiment
Embodiment 1
By the isopentene group polyethers of 1mol, 0.5mol dimethyl fumarate and 130mol deionized water, put into
In reaction flask, heat up, at a temperature of 70 DEG C, stirring makes reactant be completely dissolved, then to Deca in container
Dissolved with the l2- acrylamido-methyl propane sulfonic acid of 1.25mo, 3.4mol acrylic acid polytrimethylene glycol monoesters and
The aqueous solution of 1.5mol deionized water and 0.15mol ammonium persulfate solution and 0.1mol mass mercaptoethanol,
Control rate of addition, drip off in 3h, keeping temperature is reacted 1 hour.30% hydroxide is added after cooling
Sodium solution adjusts pH=6.5, and 50% high early strength poly-carboxylic high-performance water reducer that admittedly contain is obtained.
Embodiment 2
By the isopentene group polyethers of 1mol, 0.4mol dimethyl fumarate and 100mol deionized water, put into
In reaction flask, heat up, at a temperature of 65 DEG C, stirring makes reactant be completely dissolved, then to Deca in container
Dissolved with the 3- acrylamido phenylboric acid of 1.5mol, 3mol acrylic acid polytrimethylene glycol monoesters and 1.5mol
The aqueous solution of deionized water and 0.2mol ammonium persulfate solution and 0.35mol mass sodium allylsulfonate, control
Rate of addition processed, drips off in 3h, and keeping temperature is reacted 1 hour.30% sodium hydroxide is added after cooling
Solution adjusts pH=6.5, and 50% high early strength poly-carboxylic high-performance water reducer that admittedly contain is obtained.
Embodiment 3
By the isopentene group polyethers of 1mol, 0.5mol dimethyl fumarate and 100mol deionized water, put into
In reaction flask, heat up, at a temperature of 60 DEG C, stirring makes reactant be completely dissolved, then to Deca in container
Dissolved with the n-methylolacrylamide of 1.0mol, 4mol acrylic acid polytrimethylene glycol monoesters and 1.5mol go from
The aqueous solution of sub- water and 0.35mol ammonium persulfate solution and 0.4mol mass methallylsulfonic acid sodium, control
Rate of addition processed, drips off in 3h, and keeping temperature is reacted 1 hour.30% sodium hydroxide is added after cooling
Solution adjusts pH=6.5, and 50% high early strength poly-carboxylic high-performance water reducer that admittedly contain is obtained.
Embodiment 4
By the isopentene group polyethers of 1mol, 0.7mol dimethyl fumarate and 100mol deionized water, put into
In reaction flask, heat up, at a temperature of 70 DEG C, stirring makes reactant be completely dissolved, then to Deca in container
Dissolved with the 2- acrylamido-methyl propane sulfonic acid of 1.5mol, 3.5mol acrylic acid polytrimethylene glycol monoesters and
The aqueous solution of 1.5mol deionized water and 0.22mol ammonium persulfate solution and 0.37mol mass methallyl
Base sodium sulfonate, controls rate of addition, drips off in 3h, and keeping temperature is reacted 1 hour.Add after cooling
30% sodium hydroxide solution adjusts pH=6.5, and 50% high early strength poly-carboxylic high-performance water reducer that admittedly contain is obtained.
Embodiment 5
By the isopentene group polyethers of 1mol, 0.2mol dimethyl fumarate and 100mol deionized water, put into
In reaction flask, heat up, at a temperature of 75 DEG C, stirring makes reactant be completely dissolved, then to Deca in container
Dissolved with the NIPA of 1.4mol, 4.0mol acrylic acid polytrimethylene glycol monoesters and 1.5mol
The aqueous solution of deionized water and the isopropanol of 0.3mol ammonium persulfate solution and 0.29mol, control Deca speed
Degree, drips off in 3h, and keeping temperature is reacted 1 hour.Add 30% sodium hydroxide solution after cooling and adjust pH
=6.5,50% high early strength poly-carboxylic high-performance water reducer that admittedly contain is obtained.
Application example
In order to evaluate the dispersive property of early-strength Water-reducing Admixtures To Cements, with reference to GB 8076-2008《Mixed
Solidifying soil additive》And GB/T50081-2002《Standard for test methods of mechanical properties of ordinary concrete》Correlation
Regulation, detects the properties of this product using concrete test, keeps including the slump, air content, resistance to compression
The performance parameter such as intensity and shrinkage ratio.
Table 1 concrete mix (KG)
Experimental result see table shown in 2.The solid volume of additive folding is the 0.19% of Binder Materials, and cement is locality
Carnis Rapanae thomasianae cement.
Table 2：The experimental data of high early strength poly-carboxylic water reducer
From above-mentioned, compared with common polycarboxylate water-reducer, early-strength polycarboxylate water-reducer, diminishing
Rate and function of slump protection are basically identical, and the steam-cured compressive strength rate of concrete 5h universal PC product exceeds
30%-50%, also ratio which raises 5%-10% for 28 days comprcssive strength.Shrinkage ratio reduces 10% about within 28 days,
And produce formaldehydeless pollution, belong to environment-friendly products.The water reducer prepared by the inventive method is excellent to not only having
Different dispersive property and slump retaining, and the early strength of concrete can be improved and reduce concrete shrinkage.
Claims (7)
1. the special high early strength poly-carboxylic water reducer of a kind of prefabricated components, it is characterized in that with isopentene group polyethers, acrylamide based monomers and acrylic acid polytrimethylene glycol monoesters, it is aided with dimethyl fumarate and molecular weight regulator, add initiator to carry out copolyreaction and make；Wherein, the amount of the material of each component is isopentene group polyethers：Acrylamide based monomers：Acrylic acid polytrimethylene glycol monoesters：Dimethyl fumarate：Initiator：Molecular weight regulator=1：(1.0～1.5)：(3.0～4.0)：(0.1～1.0)：(0.1～0.5)：(0.3～0.5).
2. high early strength poly-carboxylic water reducer according to claim 1 is it is characterised in that described isopentene group pfpe molecule amount is 400-3000.
3. high early strength poly-carboxylic water reducer according to claim 1 is it is characterised in that described initiator includes one of hydrogen peroxide, Ammonium persulfate., potassium peroxydisulfate or more than one mixture.
4. high early strength poly-carboxylic water reducer according to claim 1 is it is characterised in that described acrylic acid polytrimethylene glycol monoesters is according to mol ratio 6 by acrylic acid and polytrimethylene glycol and MPEG1000:1.1:1 under solvent-free state plus catalyst and polymerization inhibitor be heated to 120 degree and carry out back flow reaction being obtained.
5. high early strength poly-carboxylic water reducer according to claim 1 is it is characterised in that described molecular weight regulator includes one of isopropanol, mercaptoethanol, sodium allylsulfonate and methylpropene sodium sulfonate or more than one mixture.
6. the preparation method of the high early strength poly-carboxylic water reducer of claim 1, it is characterized in that with isopentene group polyethers, acrylamide monomer and acrylic acid polytrimethylene glycol monoesters, and it is aided with dimethyl fumarate, molecular weight regulator under 60-80 DEG C of temperature conditionss, add initiator to carry out copolyreaction, be obtained.
7. preparation method according to claim 6 is it is characterised in that further include step high early strength poly-carboxylic water reducer being adjusted by using alkaline conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410814989.XA CN104496253B (en) | 2014-12-23 | 2014-12-23 | Special early-strength polycarboxylate superplasticizer for prefabricated parts and preparation method of special early-strength polycarboxylate superplasticizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410814989.XA CN104496253B (en) | 2014-12-23 | 2014-12-23 | Special early-strength polycarboxylate superplasticizer for prefabricated parts and preparation method of special early-strength polycarboxylate superplasticizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104496253A CN104496253A (en) | 2015-04-08 |
| CN104496253B true CN104496253B (en) | 2017-02-08 |
Family
ID=52937731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410814989.XA Active CN104496253B (en) | 2014-12-23 | 2014-12-23 | Special early-strength polycarboxylate superplasticizer for prefabricated parts and preparation method of special early-strength polycarboxylate superplasticizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104496253B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105017491A (en) * | 2015-08-24 | 2015-11-04 | 科之杰新材料集团有限公司 | Early-strength polycarboxylate superplasticizer and preparation method thereof |
| CN105218759B (en) * | 2015-10-23 | 2017-09-26 | 上海三瑞高分子材料股份有限公司 | A kind of super plasticizer and preparation method thereof |
| CN106749972B (en) * | 2016-12-07 | 2019-01-04 | 湖北工业大学 | A kind of prefabricated components low slump Early-strength polycarboxylate superplasticizer masterbatch |
| CN107777910B (en) * | 2017-09-28 | 2020-12-29 | 湖北工业大学 | Normal-temperature early-strength polycarboxylate superplasticizer for prefabricated parts and preparation method thereof |
| CN109232820B (en) * | 2018-07-26 | 2021-01-15 | 北京工业大学 | Method for preparing temperature response type comb-shaped structure polycarboxylic acid by end group functionalization |
| CN117209226A (en) * | 2023-09-13 | 2023-12-12 | 江苏通创现代建筑产业技术研究院有限公司 | Reinforced anti-cracking concrete for assembled building and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008514530A (en) * | 2003-06-06 | 2008-05-08 | 株式会社日本触媒 | Additive for hydraulic material and concrete composition |
| CN101993215A (en) * | 2009-08-11 | 2011-03-30 | 山东宏艺科技股份有限公司 | Preparation method of sulfonate water reducing agent |
| CN101735411B (en) * | 2010-01-08 | 2011-08-10 | 北京工业大学 | Method for preparing sustained-release polycarboxylic water reducer |
| CN102358763B (en) * | 2011-07-21 | 2013-10-16 | 北京工业大学 | Method for preparing additive for inhibiting side effect of clay |
| CN102992682B (en) * | 2012-09-29 | 2015-06-03 | 北京东方雨虹防水技术股份有限公司 | Universal polycarboxylic acid water reducing agent and preparation method thereof |
-
2014
- 2014-12-23 CN CN201410814989.XA patent/CN104496253B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104496253A (en) | 2015-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104496253B (en) | Special early-strength polycarboxylate superplasticizer for prefabricated parts and preparation method of special early-strength polycarboxylate superplasticizer | |
| CN105884978B (en) | It is a kind of to promote to coagulate Early-strength polycarboxylate superplasticizer and preparation method thereof | |
| EP1891126B1 (en) | Concrete and mortar admixture | |
| CN102910855B (en) | Super plasticizer for precast concrete component | |
| CN107586366B (en) | Modified polycarboxylate superplasticizer and preparation method thereof | |
| CN110938176B (en) | Super-long slump loss resistant cement-based polycarboxylate superplasticizer mother liquor and application thereof | |
| WO2016026346A1 (en) | Low-temperature method for preparing high-adaptability ether polycarboxylic acid water reducer | |
| CN103724557B (en) | A kind of preparation method of ultra early-strength polycarboxylic admixture | |
| CN109608594A (en) | A kind of Early-strength polycarboxylate superplasticizer and preparation method thereof | |
| CN108003304B (en) | Preparation method of cardanol modified ester polycarboxylate superplasticizer | |
| CN103396031B (en) | A kind of carboxylic acid water reducer and preparation method thereof | |
| CN105271903B (en) | A kind of ultra high early strength poly-carboxylic water reducer and preparation method thereof | |
| CN107474195B (en) | Polycarboxylic slump retaining agent and preparation method thereof | |
| CN105218757B (en) | Early-strength polycarboxylate superplasticizer with slump retaining function and preparation method thereof | |
| CN108751774B (en) | Preparation method of polycarboxylate superplasticizer for concrete prefabricated part | |
| CN101817657A (en) | Polycarboxylic acid slump retaining agent | |
| CN106866895A (en) | A kind of high-performance poly carboxylic acid series water reducer and preparation method thereof | |
| CN111349199B (en) | Steady-state polycarboxylic acid superplasticizer with core-shell structure and preparation method thereof | |
| CN105778009B (en) | A kind of Early-strength polycarboxylate superplasticizer and preparation method thereof and a kind of cement admixture | |
| CN105778078A (en) | Polyether-ester, preparation method thereof, early strength polycarboxylic acid water reducer prepared from polyether-ester, and preparation method of early strength polycarboxylic acid water reducer | |
| CN108003302A (en) | A kind of amidogen ether class ultra high early strength poly-carboxylic water-reducing agent and preparation method thereof | |
| CN113072666B (en) | Preparation method and application of high-water-reduction type polycarboxylic acid superplasticizer | |
| CN102910856B (en) | Super plasticizer for precast concrete component | |
| CN108218282B (en) | Preparation method of anti-mud viscosity-reducing polycarboxylic acid plasticizer | |
| CN110128601A (en) | A kind of Early-strength polycarboxylate superplasticizer and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20161128 Address after: 100176, Beijing economic and Technological Development Zone, Beijing Garden North Street, No. 27, 2, 4 Applicant after: Oriental Yuhong civil building materials limited liability company Address before: 414009 Industrial Park, Yunxi District, Hunan, Yueyang Applicant before: Yueyang Oriental Yuhong Waterproof Technology Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |