CN103626518B - High performance for concrete structure protection use organic silicon paste and preparation method thereof - Google Patents
High performance for concrete structure protection use organic silicon paste and preparation method thereof Download PDFInfo
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- CN103626518B CN103626518B CN201310632586.9A CN201310632586A CN103626518B CN 103626518 B CN103626518 B CN 103626518B CN 201310632586 A CN201310632586 A CN 201310632586A CN 103626518 B CN103626518 B CN 103626518B
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Abstract
The invention discloses a kind of high performance for concrete structure protection use organic silicon paste and preparation method thereof, it is made up of by mass percentage following several composition: organoalkoxysilane: 35.0% ~ 65.0%; Sherwood oil: 10.0% ~ 20.0%; Penetration enhancers: 1.0% ~ 3.0%; Tensio-active agent: 2.0% ~ 5.0%; Stablizer: 2.0% ~ 4.0%; Aerosil: 2.0% ~ 5.0%; Water: 10.0% ~ 30.0%.Waterborne organic silicon lotion disclosed by the invention has good depth of penetration to concrete structure, and efficient reduction concrete water regain, alkali resistance and UV resistant performance are excellent, and the present invention is easy to prepare, shelf-stable; And easy to use, applicable strength grade is greater than the protection of the high performance for concrete structure of C45.
Description
Technical field
The present invention relates to a kind of high performance for concrete structure protection use organic silicon paste and preparation method thereof, belong to building material technical field.
Background technology
Concrete structure is more and more to be applied in building structure.Structure based component keeps the weather resistance of its suitability and security capabilities to be the key property of concrete structure in design life.The Steel Bars in Concrete Structure corrosion, the concrete cracking that cause because of reasons such as concrete carbonization, chloride ion corrosion, freeze-thaw damages and the destruction such as to peel off, become the subject matter affecting concrete structure durability.In most of the cases, humidity causes the prerequisite of concrete deterioration, steel bar corrosion and freeze-thaw damage, and therefore effectively waterproof has just become to improve one of effective ways of concrete structure durability.
Silicoorganic compound have unique hydrophobic nature and to steam breathability without obvious damage feature; Concrete surface impregnating with silane method possesses skills advanced person, economical rationality, safety durable, reliable in quality and easy construction, waterproof and breathable and do not change the advantage of concrete structure outward appearance; Obtain the concern of researchist.Based on the concrete structure safeguard procedures of the surface hydrophobic process of organic silicon compound in occurring in the middle of the 19th century, to mid-term in 20th century, silane soakage technique has been successfully applied in the surfacecti proteon engineering of the concrete structures such as bridge, harbour, airport by American-European countries.Industry standard that impregnating with silane treatment technology was included in 2000 by China " concrete for marine works structural anticorrosion erosion technical specifications ", the specification such as " durability design and construction guidbook " subsequently, " highway engineering concrete structure anticorrosion technique specification ", " railway concrete durability design of structure specification " and " railway concrete structure durability is repaired and protected " is also using the protection against corrosion enhancements of impregnating with silane process as concrete structure.
Chinese patent CN101746988B discloses a kind of special silane paste protective agent for concrete and preparation method thereof, specifically with the long chain alkyl silane coupling agent of carbon chain lengths between 4 ~ 16, viscosity at 10 ~ 2000mm
2siloxane oligomer between/S, organic solvent, emulsifying agent and deionized water are that raw material prepares, and it can improve the weather resistance of concrete structure; Chinese patent CN101367670B discloses a kind of silicone hydride cream-like substance with high solid content and preparation method thereof, its component and quality proportioning are: siloxanyl monomers: emulsifying agent: deionized water=70% ~ 85%: 5% ~ 10%: 10% ~ 25%, for the maintenance of concrete surface.
Existing silicone based product can be applied in the protection works of concrete structure, but the concrete class of its application is generally at below C40, and depth of penetration is at below 5mm, some treatment agent depth of penetration is even only 1 ~ 2mm, integral waterproofing layer can not be formed, only limit the use of in normal concrete structure; Have no the report of the organic silicon paste protective agent that can infiltrate more than the C45 high performance concrete degree of depth 6 ~ 10mm at present.
On the other hand, high performance for concrete structure is in country and widespread use in the local traffic transporting facility such as high-speed railway, motorway, city underground, overhead road of city accelerated development in recent years.This intermediate item country and local investment are very large, and design life was more than 100 years; If because the endurance quality of concrete structure does not reach standard, working life shortens, and will have influence on the development of the investment projects such as country and local traffic transportation facilities.In addition, this type of high performance for concrete structure is generally built in farmland, lake ripple, mountain range, and also will be subject to the impact of summer in winter temperature, Urban Acid Rain, physical environment is severe simultaneously.So it is necessary with the weather resistance improving high performance concrete to research and develop new organosilicon protective agent.
Summary of the invention
The object of the invention is to provide a kind of high performance for concrete structure protection use organic silicon paste and preparation method thereof, this organic silicon paste can be used for the protection of grade at the high performance for concrete structure of more than C45, its performance index meet JG/T 337-2011 " concrete structure protection osmosis type coating " standard-required, in facade, top layer construction, the weather resistance of concrete structure can be improved.
General thought of the present invention is: be main tonicity with organoalkoxysilane, and sherwood oil is auxiliary waterproof ingredient, is prepared the water-based lotion of high active constituent content by Action of Surfactant; Then alcohols stablizer and aerosil antisettling agent is added, the waterborne organic silicon lotion that under water effect and under high speed dispersion operative condition, final forming property is stable.
For achieving the above object, the technical solution used in the present invention is:
A kind of high performance for concrete structure protection use organic silicon paste, by mass percentage, described waterborne organic silicon lotion is made up of following component:
Organoalkoxysilane 35.0% ~ 65.0%
Sherwood oil 10.0% ~ 20.0%
Penetration enhancers 1.0% ~ 3.0%
Tensio-active agent 2.0% ~ 5.0%
Stablizer 2.0% ~ 4.0%
Aerosil 2.0% ~ 5.0%
Water 10.0% ~ 30.0%
The structural formula of described organoalkoxysilane is:
; Wherein n:3 ~ 18, m:1 ~ 2;
Described sherwood oil is the alkane of carbon chain lengths between 10 ~ 50, the one or more than one mixture in alkene;
Described penetration enhancers molecular formula is
; Wherein n:3 ~ 18, m:1 ~ 2;
The hydrophile-lipophile balance value weighted average of described tensio-active agent are 10.0 ~ 13.0;
Described stablizer is polyvinyl alcohol.
In technique scheme, described organoalkoxysilane is preferably one or more mixtures in butyl triethoxyl silane, octyltri-ethoxysilane, dodecyl triethoxysilane.
In technique scheme, described sherwood oil is the one or more than one mixture in the solvent oil of carbon chain lengths between 10 ~ 50, modification solvent oil, refining white oil, whiteruss; Be preferably whiteruss, No. 200 solvent oils or both mixtures.
In technique scheme, described penetration enhancers is preferably perfluoropropyltriethoxysilane, perfluoro capryl triethoxyl silane or both mixtures.
In technique scheme, hydrophile-lipophile balance value (HLB) weighted average of tensio-active agent adopt massfraction method of calculation to calculate by the HLB of tensio-active agent.Such as tensio-active agent is made up of A, B, C tri-kinds of tensio-active agents, so the HLB weighted average (HLB of tensio-active agent
on average) be:
HLB
on average=HLB
a× m
a+ HLB
b× m
b+ HLB
c× m
c, wherein m
a, m
b, m
cbe respectively the massfraction of A, B, C tri-kinds of tensio-active agents, HLB
a, HLB
b, HLB
cbe respectively the hydrophile-lipophile balance value of A, B, C tri-kinds of tensio-active agents.
The HLB of the tensio-active agent that the present invention selects
on averagebe 10.0 ~ 13.0, the organic silicon paste Absorbable organic halogens stably stored obtained thus, do not analyse oil, not stratified.One or more than one mixture in preferred alkyl polyoxyethylenated alcohol paregal O series of the present invention, alkylphenol polyoxyethylene OP series, sorbitan fatty(acid)ester SP series, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate is as tensio-active agent; One or more than one mixture in further preferred alkyl polyoxyethylenated alcohol peregal O-25, alkylphenol polyoxyethylene OP-10, sorbitan fatty(acid)ester SP-80 is as tensio-active agent.
In technique scheme, the specific surface area of described aerosil is 150 ~ 300m
2/ g.
In technique scheme, described polyvinyl alcohol preferred degree of polymerization is 1650 ~ 1750, and alcoholysis degree is the polyvinyl alcohol of 88%.
The invention also discloses the preparation method of above-mentioned waterborne organic silicon lotion, specific as follows:
According to the above ratio;
(1) stablizer, aerosil are added to the water, mix and obtain solution A;
(2) tensio-active agent, organoalkoxysilane, penetration enhancers are joined in sherwood oil, mix and obtain B solution;
(3) under high speed dispersion condition, solution A is added dropwise in B solution; After dropwising, keep high speed dispersion until liquid forms paste, be described waterborne organic silicon lotion.
In technique scheme, the 8m/s that during dispersion of step (3) high speed, the dispersible granule footpath linear velocity of solution A reaches, the rate of addition of solution A is 10 ~ 20g/minkg, and namely prepare 1kg high performance for concrete structure protection use organic silicon paste, the rate of addition of solution A is 10 ~ 20g/min; Such as prepare 100kg high performance for concrete structure protection use organic silicon paste, so the rate of addition of solution A is 1000 ~ 2000g/min.
Silane is a kind of osmosis type soaker of excellent performance, there is small molecule structure, the cement of percdation concrete capillary hole wall and aquation can react and form polysiloxane inierpeneirating network structure, by firmly chemical bonding reaction, give the hydrophobic nature that the microtexture of concrete surface is long-term, and keep ventilating function, greatly reduce the intrusion of water and harmful chloride ion etc., ensure that concrete structure is from corrosion.
The present invention is using penetration enhancers as ancillary component, and penetration enhancers is fluorine silicon class coupling agent, has desirable penetrating quality, and can penetrate into inner more than the 10mm degree of depth at concrete surface fast, be the ideal material of concrete protection; In addition, fluorine silicon class coupling agent has low surface tension feature, effectively can keep the super-hydrophobic state of concrete base layer, avoids because moisture and other compositions are to concrete corrosion.
The present invention selects sherwood oil as emulsification ancillary component, mainly because the structural formula of sherwood oil is closer to tensio-active agent, sherwood oil structure surfactant-dispersed formed in micella process be conducive to stable micella particle not breakdown of emulsion, do not analyse oil.
In addition, the present invention selects polyvinyl alcohol and aerosil as antisettling agent, and wherein polyvinyl alcohol molecule great amount of hydroxy group in dispersion process is wrapped in micella particle, prevents micella to be combined with each other breakdown of emulsion; And aerosil can active adsorption water molecules in dispersion process, strengthen Intermolecular Forces, reach the object of stable lotion.
Protective agent of the present invention take organoalkoxysilane as main component; interpolation sherwood oil, penetration enhancers are auxiliary material; under tensio-active agent and stabilizer function; at aerosil as under antisettling agent effect; the fine and smooth body of paste of uniform and stable white prepared by mechanical dispersion effect, protective agent product of the present invention has obvious advantage in environment protection, construction easy way, depth of penetration and luck tendency.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1. experiment proves, the high performance for concrete structure seepage force that organoalkoxysilane in high performance for concrete structure protection organic silicon paste of the present invention is greater than C45 to strength grade is strong, effective depth of penetration reaches 6.5 ~ 10mm, far above 0.5 ~ 5mm of prior art; Achieve beyond thought technique effect;
2. the present invention adds penetration enhancers fluorosilicone first in the agent of organosilicon concrete structural shielding, and wherein fluorosilicone effectively can strengthen organoalkoxysilane in concrete surface volume depth of penetration and reduce its water regain, is conducive to extending concrete time limit of service;
3. reasonable, easy to prepare, the shelf-stable of high performance for concrete structure protection organic silicon paste raw material disclosed by the invention composition, water demand ratio is little, UV resistant and alkaline resistance properties excellent; And easy to use, be applicable to industrial applications.
Embodiment
Below by embodiment, the invention will be further described:
The raw material composition mass percent of organic silicon paste in table 1 embodiment
Preparation method:
According to the material rate of table 1, first stablizer, aerosil are added to the water, mix and obtain solution A; Then tensio-active agent, organoalkoxysilane, penetration enhancers are joined in sherwood oil, mix and obtain B solution;
By solution A high speed dispersion, B solution is added drop-wise in solution A simultaneously, wherein the dispersible granule footpath linear velocity of solution A is 8m/s, in embodiment one, two, three, the rate of addition of solution A is respectively 10g/minkg, 15g/minkg, 20g/minkg, keep high speed dispersor rate of dispersion even in dropping process, until B liquid adds solution A completely; Continue high speed machine dispersion, until emulsion becomes the water-based body of paste of isotropic stable, be high performance for concrete structure protection use organic silicon paste.
By above-mentioned body of paste blade coating in C45 concrete surface, by JG/T 337-2011 " osmosis type coating is used in concrete structure protection " prescriptive procedure test, the results are shown in Table 2.
Table 2 product property characterizes
| Test event | Embodiment one | Embodiment two | Embodiment three |
| Outward appearance | Color even inclusion-free | Color even inclusion-free | Color even inclusion-free |
| Stability | Without layering, without floating oil, without obvious sediment | Without layering, without floating oil, without obvious sediment | Without layering, without floating oil, without obvious sediment |
| Depth of penetration/mm | 6.5 | 8.3 | 10.2 |
| Water demand ratio/% | 9.8 | 8.7 | 7.2 |
| The chloride permeability degree of depth, mm | 6.7 | 5.8 | 5.0 |
| Water demand ratio (after ultraviolet ray ageing)/% | 9.8 | 8.9 | 8.1 |
| Water demand ratio (after alkaline-resisting)/% | 11.6 | 10.3 | 10.1 |
As seen from the above table, the high performance for concrete structure seepage force that organoalkoxysilane in the high performance for concrete structure protection organic silicon paste of the present embodiment is greater than C45 to strength grade is strong, effective depth of penetration reaches 6.5 ~ 10.2 mm, far above 0.5 ~ 5mm of prior art; Achieve beyond thought technique effect.
Claims (5)
1. a high performance for concrete structure protection use organic silicon paste, it is characterized in that, by mass percentage, described waterborne organic silicon lotion is made up of following component:
Organoalkoxysilane 35.0% ~ 65.0%
Sherwood oil 10.0% ~ 20.0%
Penetration enhancers 1.0% ~ 3.0%
Tensio-active agent 2.0% ~ 5.0%
Stablizer 2.0% ~ 4.0%
Aerosil 2.0% ~ 5.0%
Water 10.0% ~ 30.0%
Described organoalkoxysilane is one or more mixtures in butyl triethoxyl silane, octyltri-ethoxysilane, dodecyl triethoxysilane;
Described sherwood oil is whiteruss, No. 200 solvent oils or both mixtures;
Described penetration enhancers is perfluoropropyltriethoxysilane, perfluoro capryl triethoxyl silane or both mixtures;
Described tensio-active agent is the one or more than one mixture in alkyl alcohol ethoxylates paregal O series, alkylphenol polyoxyethylene OP series, sorbitan fatty(acid)ester SP series, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate;
Described stablizer is polyvinyl alcohol.
2. high performance for concrete structure protection use organic silicon paste according to claim 1, is characterized in that: the specific surface area of described aerosil is 150 ~ 300m
2/ g.
3. high performance for concrete structure protection use organic silicon paste according to claim 1, is characterized in that: the polymerization degree of described polyvinyl alcohol is 1650 ~ 1750, and alcoholysis degree is 88%.
4. a preparation method for high performance for concrete structure protection use organic silicon paste, is characterized in that, comprise the following steps:
(1) stablizer according to claim 1, aerosil are added to the water, mix and obtain solution A;
(2) tensio-active agent according to claim 1, organoalkoxysilane, penetration enhancers are joined in sherwood oil, mix and obtain B solution;
(3) under high speed dispersion condition, solution A is added dropwise in B solution; After dropwising, keep high speed dispersion until liquid forms paste, be described waterborne organic silicon lotion.
5. preparation method according to claim 4, is characterized in that: during step (3) high speed dispersion, the dispersible granule footpath linear velocity of solution A is 8m/s, and the rate of addition of solution A is 10 ~ 20g/minkg.
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| CN103964737B (en) * | 2014-04-25 | 2016-01-20 | 纳谷新材料(杭州)有限公司 | Wear-resisting infiltration stiffening agent of nano-silicon modified double components and preparation method thereof |
| KR101524979B1 (en) * | 2014-05-26 | 2015-06-02 | 주식회사 우리산업개발 | Composition for coloring the surface of concrete |
| CN104926366B (en) * | 2015-06-05 | 2016-08-24 | 哈尔滨工业大学 | A kind of preparation method of concrete silane paste dipping waterproofing agent |
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| CN115595062B (en) * | 2022-12-12 | 2023-04-07 | 甘肃省交通规划勘察设计院股份有限公司 | Multifunctional concrete protective paste and preparation method thereof |
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Address after: Wuzhong Economic Development Zone in Suzhou City, Jiangsu province 215104 Yuexi No. 1368 Street Wuzhong Avenue, building 3 Patentee after: SUZHOU INSTITUTE OF BUILDING SCIENCE GROUP COMPANY LIMITED Address before: 215129, Binhe Road, Suzhou hi tech Zone, Jiangsu, Suzhou, 1979 Patentee before: Suzhou Architecture Scientific Institute Co., Ltd. |
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Effective date of registration: 20210907 Address after: No. 1979, Yinzhong South Road, Hedong Industrial Park, Wuzhong Economic Development Zone, Suzhou, Jiangsu 215000 Patentee after: SUZHOU GUSU NEW BUILDING MATERIAL Co.,Ltd. Address before: 215104 building 3, No. 1368, Wuzhong Avenue, Yuexi street, Wuzhong Economic Development Zone, Suzhou, Jiangsu Patentee before: SUZHOU INSTITUTE OF BUILDING SCIENCE GROUP Co.,Ltd. |