CN101531482A - Shrinkage reducing and curing agent for concrete - Google Patents
Shrinkage reducing and curing agent for concrete Download PDFInfo
- Publication number
- CN101531482A CN101531482A CN200910026405A CN200910026405A CN101531482A CN 101531482 A CN101531482 A CN 101531482A CN 200910026405 A CN200910026405 A CN 200910026405A CN 200910026405 A CN200910026405 A CN 200910026405A CN 101531482 A CN101531482 A CN 101531482A
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- CN
- China
- Prior art keywords
- concrete
- agent
- curing agent
- shrinkage reducing
- water
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- 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.)
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Classifications
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
Abstract
The invention relates to a shrinkage reducing and curing agent for concrete, which has double functions of a shrinkage reducing agent for concrete and a curing agent for concrete and belongs to a building material. The shrinkage reducing and curing agent for concrete comprises a multifunctional high molecular polymer, and is a high-efficiency shrinkage and reducing curing agent comprising a water-soluble organic high-molecular film-forming agent, an inorganic densification agent, a shrinkage reducing agent, and the like. The shrinkage reducing and curing agent is directly brushed on the concrete surface layer to prevent water evaporation, and is capable of permeating through the capillary pores of the concrete to block the channel from which water in the capillary pores evaporates outwards. Meanwhile, the shrinkage reducing and curing agent can reduce the surface tension of water in the capillary pores so as to reduce the drying shrinkage of the concrete, thereby playing a good role in reducing shrinkage, conserving water and curing.
Description
Technical field
The present invention relates to a kind of concrete additive, relate in particular to a kind of shrinkage reducing and curing agent for concrete.
Background technology
After the concrete depositing, in the process of initial set, must carry out maintenance, promptly keep necessary humidity, make it have suff water to guarantee that hydration reaction is complete.China was starting late aspect the development and application of curing compound, just just began to have adopted in some concrete workses chemical regimen in nearly ten years.Obtain practical main curing agent following a few class is arranged: (1) paraffin wax emulsions; (2) based on the aqueous silicate solution of water glass; (3) solvent type resin solution.Their maintenance mechanism all is to form water-resisting layer at concrete surface, stops and mixes and stirs the volatilization of moisture, thereby realize concrete from maintenance.Though curing agent all has been widely used in engineering and has obtained good maintenance effect, but domestic present curing agent is various in style, quality is uneven, and can not reduce the dry shrinkage of concrete at all, desciccation crack still can occur, and portioned product has influence on the adhesive property and the outward appearance of concrete topping.
Concrete will produce contraction in drying process, form desciccation crack on the top layer, economization agent can significantly reduce the drying shrinkage value that produces in the course of hardening, numerous scholars of Japan, the U.S. have carried out research extensively and profoundly to this field, and in many engineerings such as factory building, road, bridge, tunnel, pond, embankment, be applied, obtained effect preferably.Economization agent is tried out from beginning at first, just shows extremely good reducing and effect of anti-cracking, and is acknowledged as one of effective measure of concrete structure crack control.One of distinguishing feature of economization agent is that its action effect is not subjected to the construction and maintenance condition effect, both can be used for underground structure, also can be used for superstructure.Economization agent will become one of important trend of modern concrete admixture technical development with its unique advantages.But economization agent price height mixes inside concrete and has caused water reducer and economization agent compatibility problem at present, has directly influenced in its domestic applying.
Summary of the invention
In order to overcome above-mentioned defective, the technical problem to be solved in the present invention is: a kind of function that has economization agent and curing agent simultaneously is provided, can reduces concrete dry shrinkage, can carry out maintenance to concrete again.
In order to overcome the defective that exists in the background technology, the technical solution adopted for the present invention to solve the technical problems is: a kind of shrinkage reducing and curing agent for concrete, described shrinkage reducing and curing agent for concrete comprises: 10～20 weight % economization agents, 2～10 weight % water soluble organic polymer membrane-forming agents, the inorganic density agent of 2～5 weight %, 2～5 weight % permeate agents, surplus is a water.
According to another technical scheme of the present invention, the economization agent that shrinkage reducing and curing agent for concrete comprises contains methyl methacrylate and poly glycol monomethyl ether acrylate, methyl methacrylate: poly glycol monomethyl ether acrylate=2: 3, poly glycol monomethyl ether acrylate number-average molecular weight is 900～1500, and the economization agent number-average molecular weight is 10000～50000.
According to another technical scheme of the present invention, the water-soluble polymer membrane-forming agent that shrinkage reducing and curing agent for concrete comprises is one or more a mixture of polyvinyl alcohol modification resin, polyacrylic acid and polyacrylamide modified resin.
According to another technical scheme of the present invention, the inorganic density agent that shrinkage reducing and curing agent for concrete comprises is a water glass, modulus of water glass 1～1.5.
According to another technical scheme of the present invention, the permeate agent that shrinkage reducing and curing agent for concrete comprises is a polyoxyethylene glycol, the number-average molecular weight 200～2000 of polyoxyethylene glycol.
Beneficial effect of the present invention be directly with brushing of the present invention at concrete surface, form the colourless fluid-tight efficient curing membrane of successive at concrete surface layer, prevent the evaporation of moisture, porous is to the concrete pore again, generate insolubles with the reaction of hydrated cementitious product and stop up pore, stopped up the passage of the outside evaporation of water of pore, can reduce simultaneously the surface tension of water in the pore, reduce pore water additional pressure, reduce concrete dry shrinkage, play well and reduce, the water-preserving curing effect is impelled the abundant aquation of cement, improve concrete intensity, reduce the dry shrinkage of concrete crack.The present invention is nontoxic, tasteless, and environmentally safe is easy to use, is applicable to the concrete surface layer of various environment and condition, is particularly useful for the concrete of dry geographic new cast.Easy to use, low price, effective, its application item comprises in many engineerings such as factory buildings such as concrete flat slab, road surface, bridge, training wall, reservoir and water treatment plant, road, bridge, tunnel, pond, embankment, both can be used for underground structure, also can be used for superstructure.
Shrinkage reducing and curing agent of the present invention is after the concrete of new cast or sand-cement slurry initial set or uses during the firm demoulding of concrete.The method of brushing can roller coating, spraying or brushing, and the surface covered of shrinkage reducing and curing agent of the present invention is 10～50 square metres of per kilogram coatings.
Use shrinkage reducing and curing agent of the present invention, effectively water retention is greater than 90%, and favourable to concrete strength, compressive strength rate is all greater than 100%, and 3 days decrements are clearly, decrement greater than 70%, 28 day decrement greater than 30%.This shrinkage reducing and curing agent has the dual-use function of economization agent and curing agent simultaneously.
Embodiment
The present invention is further detailed explanation at preferred embodiment now.
Embodiment 1
Shrinkage reducing and curing agent for concrete, the prescription of this maintenance are (weight percent)
| The main branch | Raw material | Per-cent | Technical indicator |
| Filler | Water | 73 | Tap water |
| Economization agent | Methyl methacrylate; The poly glycol monomethyl ether acrylate | 10 | Methyl methacrylate: poly glycol monomethyl ether acrylate=2: 3, poly glycol monomethyl ether acrylate number-average molecular weight is 900, the economization agent number-average molecular weight is 10000 |
| Water-soluble organic | Polyacrylic acid | 9 | Number-average molecular weight 40000 |
| Macromolecule film former | Sodium | ||
| Inorganic density agent | Water glass | 5 | Modulus of water glass 1.5 |
| Permeate agent | Polyoxyethylene glycol | 4 | Number-average molecular weight 2000 |
Embodiment 2
JK-SRA shrinkage reducing and curing agent, the prescription of this maintenance are (weight percent);
| The main branch | Raw material | Per-cent | Technical indicator |
| Filler | Water | 73 | Tap water |
| Economization agent | Methyl methacrylate; The poly glycol monomethyl ether acrylate | 15 | Methyl methacrylate: poly glycol monomethyl ether acrylate=2: 3, poly glycol monomethyl ether acrylate number-average molecular weight is 1200, and the economization agent number-average molecular weight is 20000 |
| The water soluble organic polymer membrane-forming agent | Polyvinyl alcohol | 4 | Number-average molecular weight 40000 |
| Inorganic density agent | Water glass | 5 | Modulus of water glass 1.5 |
| Permeate agent | Polyoxyethylene glycol | 3 | Number-average molecular weight 1000 |
Embodiment 3
JK-SRA shrinkage reducing and curing agent, the prescription of this maintenance are (weight percent);
| The main branch | Raw material | Per-cent | Technical indicator |
| Filler | Water | 72 | Tap water |
| Economization agent | Methyl methacrylate; The poly glycol monomethyl ether acrylate | 20 | Methyl methacrylate: poly glycol monomethyl ether acrylate=2: 3, poly glycol monomethyl ether acrylate number-average molecular weight is 1500, the economization agent number-average molecular weight is 50000 |
| The water soluble organic polymer film forming matter | Polyvinyl alcohol | 3 | Number-average molecular weight is 1500 |
| Inorganic density material | Water glass | 2 | Modulus of water glass 1.0 |
| Permeate agent | Polyoxyethylene glycol | 3 | Number-average molecular weight 200 |
With the shrinkage reducing and curing agent for concrete of above-mentioned prescription, in the concrete sample initial set, and after the test specimen top layer do not have bleeding, evenly brushing was compared with the normal concrete test specimen on the test specimen top layer, surveys its effective water retention, compressive strength rate, decrement ratio.
Show (below be all percentage ratio) as following table:
The result shows that the concrete crushing strength that adopts shrinkage reducing and curing agent of the present invention has all surpassed the normal concrete intensity of not brushing this product, illustrates that this product of brushing can improve concrete intensity.Effective water retention of this shrinkage reducing and curing agent has reached the first grade standard of curing agent standard.Brush this product and can obviously reduce the contraction of concrete sample.Embodiment 3 heavily reduces performance, and embodiment 1 stresses the maintenance water retention property, and both take into account embodiment 2.Can illustrate fully that from above testing data this shrinkage reducing and curing agent has the dual-use function of economization agent and curing agent simultaneously.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification sheets, must determine its technical scope according to the claim scope.
Claims (5)
1, a kind of shrinkage reducing and curing agent for concrete is characterized in that, described shrinkage reducing and curing agent for concrete comprises: 10～20 weight % economization agents, 2～10 weight % water soluble organic polymer membrane-forming agents, the inorganic density agent of 2～5 weight %, 2～5 weight % permeate agents, surplus is a water.
2, shrinkage reducing and curing agent for concrete according to claim 1, it is characterized in that, described economization agent contains methyl methacrylate and poly glycol monomethyl ether acrylate, methyl methacrylate: poly glycol monomethyl ether acrylate=2: 3, poly glycol monomethyl ether acrylate number-average molecular weight is 900～1500, and the economization agent number-average molecular weight is being 10000～50000.
3, shrinkage reducing and curing agent for concrete according to claim 1 is characterized in that, described water-soluble polymer membrane-forming agent is one or more a mixture of polyvinyl alcohol modification resin, polyacrylic acid and polyacrylamide modified resin.
4, shrinkage reducing and curing agent for concrete according to claim 1 is characterized in that, described inorganic density agent is a water glass, modulus of water glass 1～1.5.
5, shrinkage reducing and curing agent for concrete according to claim 1 is characterized in that, described permeate agent is a polyoxyethylene glycol, the number-average molecular weight 200～2000 of polyoxyethylene glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910026405 CN101531482B (en) | 2009-04-22 | 2009-04-22 | Shrinkage reducing and curing agent for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910026405 CN101531482B (en) | 2009-04-22 | 2009-04-22 | Shrinkage reducing and curing agent for concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101531482A true CN101531482A (en) | 2009-09-16 |
| CN101531482B CN101531482B (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910026405 Expired - Fee Related CN101531482B (en) | 2009-04-22 | 2009-04-22 | Shrinkage reducing and curing agent for concrete |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767370B (en) * | 2010-02-02 | 2012-05-02 | 重庆大学 | Cement concrete curing method |
| CN101811887B (en) * | 2009-12-08 | 2012-05-30 | 河南省绿韵建材有限公司 | Concrete curing agent and preparation method thereof |
| CN103058544A (en) * | 2012-12-24 | 2013-04-24 | 浙江工业大学 | Bi-component curing agent used for cement concrete and application thereof |
| CN105384388A (en) * | 2015-11-05 | 2016-03-09 | 河海大学 | Carbon nano tube modified shrinkage reducing agent and preparation method and application thereof |
| CN106146036A (en) * | 2016-06-28 | 2016-11-23 | 中国路桥工程有限责任公司 | Curing compound |
| CN106186794A (en) * | 2016-07-04 | 2016-12-07 | 中交四航工程研究院有限公司 | A kind of high-effective concrete anti-cracking curing agent, its preparation method and application |
| CN107572859A (en) * | 2017-08-31 | 2018-01-12 | 山东博发智能科技有限公司 | A kind of regeneration concrete economization agent and preparation method thereof |
| CN108059696A (en) * | 2017-12-22 | 2018-05-22 | 上海东大化学有限公司 | A kind of environment-friendly type concrete curing agent and preparation method thereof |
| CN109987966A (en) * | 2019-04-24 | 2019-07-09 | 中国路桥工程有限责任公司 | Curing compound |
| CN114395296A (en) * | 2021-12-28 | 2022-04-26 | 杭州建工建材有限公司 | Curing agent for concrete and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6358310B1 (en) * | 2001-06-14 | 2002-03-19 | W. R. Grace & Co.-Conn. | Air entraining admixture compositions |
| CN1238294C (en) * | 2004-05-28 | 2006-01-25 | 哈尔滨工业大学 | Concrete reducing agent |
| CN1300198C (en) * | 2005-06-21 | 2007-02-14 | 重庆大学 | Polyacrylic acid salts shrinkage-reducing-agent and method for making same |
-
2009
- 2009-04-22 CN CN 200910026405 patent/CN101531482B/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811887B (en) * | 2009-12-08 | 2012-05-30 | 河南省绿韵建材有限公司 | Concrete curing agent and preparation method thereof |
| CN101767370B (en) * | 2010-02-02 | 2012-05-02 | 重庆大学 | Cement concrete curing method |
| CN103058544A (en) * | 2012-12-24 | 2013-04-24 | 浙江工业大学 | Bi-component curing agent used for cement concrete and application thereof |
| CN103058544B (en) * | 2012-12-24 | 2014-10-08 | 浙江工业大学 | Bi-component curing agent used for cement concrete and application thereof |
| CN105384388B (en) * | 2015-11-05 | 2017-11-03 | 河海大学 | A kind of carbon nano-tube modification economization agent and its preparation method and application |
| CN105384388A (en) * | 2015-11-05 | 2016-03-09 | 河海大学 | Carbon nano tube modified shrinkage reducing agent and preparation method and application thereof |
| CN106146036A (en) * | 2016-06-28 | 2016-11-23 | 中国路桥工程有限责任公司 | Curing compound |
| CN106186794A (en) * | 2016-07-04 | 2016-12-07 | 中交四航工程研究院有限公司 | A kind of high-effective concrete anti-cracking curing agent, its preparation method and application |
| CN106186794B (en) * | 2016-07-04 | 2018-08-17 | 中交四航工程研究院有限公司 | A kind of high-effective concrete anti-cracking curing agent, preparation method and application |
| CN107572859A (en) * | 2017-08-31 | 2018-01-12 | 山东博发智能科技有限公司 | A kind of regeneration concrete economization agent and preparation method thereof |
| CN108059696A (en) * | 2017-12-22 | 2018-05-22 | 上海东大化学有限公司 | A kind of environment-friendly type concrete curing agent and preparation method thereof |
| CN108059696B (en) * | 2017-12-22 | 2020-03-31 | 上海东大化学有限公司 | Environment-friendly concrete curing agent and preparation method thereof |
| CN109987966A (en) * | 2019-04-24 | 2019-07-09 | 中国路桥工程有限责任公司 | Curing compound |
| CN109987966B (en) * | 2019-04-24 | 2021-11-09 | 中国路桥工程有限责任公司 | Concrete curing agent |
| CN114395296A (en) * | 2021-12-28 | 2022-04-26 | 杭州建工建材有限公司 | Curing agent for concrete and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101531482B (en) | 2011-11-16 |
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Owner name: CHANGZHOU INSTITUTE OF BUILDING RESEARCH CO., LTD. Owner name: JIANGSU NIGAO TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: JIANGSU DINGDA MATERIALS CO., LTD. Effective date: 20110819 |
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Effective date of registration: 20110819 Address after: 213044 Jiangsu Province, Changzhou city Wujin District Zou Quzhen Bu Yi Industrial Zone, Road No. 1 Applicant after: Jiangsu Nigao Technology Co., Ltd. Co-applicant after: Changzhou Architectural Research Institute Co., Ltd. Address before: 213015 Jiangsu province Xinbei District of Changzhou City Luo Xi Zhen Wang Xia Cun Nan Zhuang Applicant before: Jiangsu Dingda Materials Co., Ltd. |
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Address after: 213044 Jiangsu Province, Changzhou city Wujin District Zou Quzhen Bu Yi Industrial Zone, Road No. 1 Patentee after: Jiangsu Nigao Science & Technology Co., Ltd. Patentee after: Changzhou Institute of building science group Limited by Share Ltd Address before: 213044 Jiangsu Province, Changzhou city Wujin District Zou Quzhen Bu Yi Industrial Zone, Road No. 1 Patentee before: Jiangsu Nigao Science & Technology Co., Ltd. Patentee before: Changzhou Architectural Research Institute Co., Ltd. |
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Granted publication date: 20111116 Termination date: 20190422 |