CN100567199C - A kind of coating for concrete for maintenance and protection and preparation using method thereof - Google Patents
A kind of coating for concrete for maintenance and protection and preparation using method thereof Download PDFInfo
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- CN100567199C CN100567199C CNB2005101106470A CN200510110647A CN100567199C CN 100567199 C CN100567199 C CN 100567199C CN B2005101106470 A CNB2005101106470 A CN B2005101106470A CN 200510110647 A CN200510110647 A CN 200510110647A CN 100567199 C CN100567199 C CN 100567199C
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Abstract
A kind of concrete comprises liquid ingredient A and powder B component with sulfate resistance maintenance and protection coating, and this liquid ingredient A comprises polymer emulsion, dispersion agent and defoamer; This powder B component comprises hydraulic material, filler, fine sand.Among this liquid ingredient A: polymer emulsion content is 100 mass parts, and dispersant is 0.5～2 mass parts, and antifoam content is 0.5～2 mass parts; Hydraulic material content is that 50～100 mass parts, filler and fine content are 200～300 mass parts in this powder B component; The present invention is the concrete paint that has the efficient maintenance and protection function of good maintenance action and good barrier propterty simultaneously, can satisfy the requirement of concrete structure protection under the condition of sulfate condition.
Description
Technical field
The invention belongs to building material technical field, relate to concrete paint.
Background technology
Now, people have formed common recognition more widely, and promptly the chemical resistance of concrete itself is limited, and therefore, for the concrete structure that is in the corrosive environment, the additional surface protective layer is necessary.Especially be in the concrete in the sulphate corrosion environment, except the corrosion of ettringite type and gypsum model, also there is the corrosion of carbon sulphur rankinite (Taumasite) type, the latter is at low temperature (＜10 ℃) and have under the condition that Calucium Silicate powder, lime carbonate, calcium sulfate, water exist, and will corrode.The portland cement concrete that uses all contains Calucium Silicate powder and lime carbonate now, and therefore, under the cold condition in condition of sulfate, the corrosion of carbon sulphur rankinite type is inevitable.With regard to present state of the art, prevent that vitriol from invading concrete is to prevent that concrete from producing the major measure of sulphate corrosion, and be unique measure of anti-blocking sulphur rankinite type sulphate corrosion.
Be used to stop moisture and corrosive medium to invade concrete coating and obtained a lot of application, various products have been arranged on the market, can be used for underground and ground concrete structure.Existing protective coating has two types, i.e. solvent-borne type coating and water-borne coatings, and water-borne coatings can also be divided into the hydraulicity (containing cement etc.) coating and air-setting coating.Solvent based coating and air-setting water-borne coatings can only be constructed on the exsiccant concrete structure.
For newly-built concrete structure,, just apply supercoat later on as early as possible in hardening of cement, thereby prevent that for the alkaline environment of keeping the protection reinforcing bar steel bar corrosion from being very important because design and the imperfect thing of Construction control often take place.In addition, the early concrete structure also needs to take the maintenance measure, and measure commonly used comprises the wet straw mattress of covering and constantly waters and the covering of maintenance later stage use plastics film.
Available coagulation soil protective coating all only has the certain protection function, can not be used for the precuring of concrete structure.Existing polymer-modified cement waterproof paint has only been considered water-proof function, generally with Portland cement and pearl filler and polymer emulsion preparation, does not consider the aggressiveness of vitriol to coating itself.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of concrete paint that has the efficient maintenance and protection function of good maintenance action and good barrier propterty simultaneously, to satisfy the requirement of concrete structure protection under the condition of sulfate condition.
The present invention also will solve the preparation and the using method of this coating.
For solving the problems of the technologies described above, the present invention is performed such: coating of the present invention is two-pack, and the A component is a liquid, is made up of polymer emulsion, dispersion agent and defoamer; The B component is a powder, is made up of cement/hydraulic material, filler, fine sand.Wherein: polymer emulsion is benzene emulsion or acrylic ester emulsion, the benzene emulsion S-400 that for example can select Basf China Co., Ltd to produce, benzene emulsion R-161 and acrylic ester emulsion U-413 that Shanghai petrochemical industry connection carbon is produced; Defoamer is silicone based or mineral oil defoaming agent or compound defoamer; Hydraulic material is fluoroaluminate cement or aluminosulfate cement or ferro-aluminate cement or sulphate-resistant cement; Filler is talcum powder, zinc oxide, flyash, silica powder.Coating of the present invention is formed proportioning such as table 1.
Table 1 coating is formed proportioning
The preparation technology of coating of the present invention comprises following two steps:
The first step is the preparation of A, B component.
The preparation of A component; Adopt suitable whipping device, in polymer emulsion, add the defoamer of liquid and the dispersion agent of liquid while stirring,, pack with airtight container such as plastic tank with cover then up to stirring;
B component preparation: the dry powder whipping device that adopts suitable belt stirrer, for example, in equipment, add filler and exsiccant fine sand earlier, under whipped state, add hydraulic cementing materials, continue to stir after adding up to evenly, material sieves (1mm aperture) back with Moisture Proof Pager Bag or plastics bag or plastic tank airtight package.The B component of weather-proof dressing can be preserved 6 months.
Second step was the preparation of protective coating and construction: protective coating should use on-the-spot preparation.One time the coatings formulated total amount should use up in 2 hours.A, B constituent mass ratio are A: B=1: (0.8～2.0) is preferably 1: (1.0～1.6).With mechanical type whipping appts preparation coating, for example agitator is installed on the pistol type electric drill as whipping appts, under agitation the B component is added in the A component, the continuation stir about is 3～5 minutes adding after.During construction, earlier in matrix surface brushing primary coat, primary coat adds water (volume ratio of A component and water is 2: 1) by the A component, and stirring forms.Then even mixed material is coated on clean matrix surface with hairbrush, cylinder or scraper, repeats 2～4 times, maintain about 1.5mm～2mm its coat-thickness more than 4 hours each pitch time.Every square meter materials are about 3kg.
The present invention has following advantage:
Since the employed component of coating of the present invention and reaction product itself thereof not with vitriol generation chemical reaction, thereby itself have the ability of anti-vitriol;
2. because coating of the present invention adopts the polymer emulsion of water-based, there is not volatile organic matter, environmentally friendly;
3. adopted the inorganic coagulation material preparation of the hydraulicity owing to the present invention, so this coating can be constructed on the concrete surface of moist (the no free water in surface) directly;
4. because coating of the present invention has adopted the polymer emulsion of film forming properties excellence, coating surface in drying process forms the polymeric film of one deck sealing, thereby the moisture loss that can reduce or stop concrete substrate is played maintenance action to newly-built concrete;
5. preparation technology of the present invention is simple, with low cost.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is further described.For simplicity's sake, in following examples, the A component immobilizes, (in fact its proportioning yes variable); And the B component adopts different inorganic coagulation material and filler, and the proportioning of A, B component can change, and as A: B=1: (0.8～2.0) is preferably 1: (1.0～1.6).The B component prescription of various embodiment sees Table 2.
Embodiment 1
This example uses fluoroaluminate cement to be hydraulic cementing materials.The main hydration products of fluoroaluminate cement is trithiophenol salt type aquation calcium sulphoaluminate, ALUMINA HYDRATE gel and hydrated calcium silicate, and the sulfate resistance ability of itself is outstanding.Filler is a talcum powder, also can use silica powder.Because fluoroaluminate cement is the clotting rapid hardening cement, though polymer emulsion has certain delayed coagulation, (0.2～0.3) the % boric acid that still can add cement quality in case of necessity is as retardant.
The quality proportioning of A, B component is A: B=1: 1.
The prescription of B component among the various embodiment of table 2
Embodiment 2
This example uses aluminosulfate cement as hydraulic cementing materials.The main hydration products of aluminosulfate cement is trithiophenol salt type aquation calcium sulphoaluminate and single sulphur type aquation sulplo-aluminate, ALUMINA HYDRATE gel and hydrated calcium silicate gel.It has anti-preferably sulphate attack performance.
The quality proportioning of A, B component is A: B=1: 0.8.
Embodiment 3
This example uses ferro-aluminate cement as hydraulic cementing materials.Ferro-aluminate cement has good sulfuric-resisting performance.Use silica powder and fine sand as filler, can make the ventilation property of coating better.
The quality proportioning of A, B component is A: B=1: 1.6
Embodiment 4
This example uses sulphate-resistant cement as hydraulic cementing materials.Use flyash as active filler simultaneously, consume the calcium hydroxide that generates in the hydrated product, eliminate gypsum model corrosive latency.
The quality proportioning of A, B component is A: B=1: 1.2.
Embodiment 5
This example uses ordinary Portland cement as hydraulic cementing materials, but consumption is less.Use flyash as active filler simultaneously, consume the calcium hydroxide that generates in the hydrated product, eliminate gypsum model corrosive latency.
The quality proportioning of A, B component is A: B=1: 2.0.
The salient features of protective coating that the present invention prepares and existing coating property relatively see Table 3.
The salient features of table 3 coating of the present invention and the comparison of existing coating property
When selecting the polymer emulsion of preparation coating, should select to be applicable to the emulsion of hydraulic cementing materials.Whether emulsion is suitable for, can check by the following method: emulsion is mixed with the mechanical stirring mode that used hydraulic cementing materials uses according to reality, the gained mixture should be for having the thickness body of good fluidity, 10min crosses 20 mesh sieve with mixture later, and residue should not surpass 1%.For with demulsifying phenomenon occurs after hydraulic cementing materials the mixes emulsion of---become gradually after mixture stirs and do not have mobile " dryness " material---, can improve by the method for adding a small amount of nonionic emulsifier (for example OP-10), and use the method for stating again and check its suitability.
When coating uses as concrete pouring, must be noted that the opportunity of construction.Should clearly not have the state of free water (surface is received and done) to construct at concrete surface, construction too early causes the coating cracking easily.In addition, can be preferably in concrete final set and begin construction later in conjunction with determining coating application opportunity concrete time of coagulation.
Second road of coating and the construction in each road later on should be carried out later in the preceding coating drying of construction together, drying regime can be determined by the test piece at scene, if under construction under the still undried situation of preceding one coating, together, cause the cracking of coating easily.
For the protection of later stage concrete structure, on moist (the no free water in surface) concrete surface, needn't use primary coat, the first road coating of can directly constructing; For the exsiccant concrete surface, should use one primary coat earlier, treat primary coat drying each road coating after the construction more later on, one coating in back should be in the construction more later on of preceding one coating drying.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (8)
1, a kind of concrete sulfate resistance maintenance and protection coating, it is characterized in that: comprise liquid ingredient A and powder B component, this liquid ingredient A comprises polymer emulsion, dispersion agent and defoamer; This powder B component comprises hydraulic cementing materials, filler, fine sand; This polymer emulsion is the type that is applicable to hydraulic cementing materials, whether emulsion is suitable for, check by the following method: emulsion is mixed according to the mechanical stirring mode of reality use with used hydraulic cementing materials, the gained mixture should be for having the thickness body of good fluidity, 10min crosses 20 mesh sieve with mixture later, and residue is no more than 1%;
This hydraulic cementing materials is a sulphate-resistant cement, comprising: fluoroaluminate cement, aluminosulfate cement, ferro-aluminate cement; This filler comprises talcum powder, zinc oxide, flyash, silica powder; Among this liquid ingredient A: polymer emulsion content is 100 mass parts, and dispersant is 0.5～2 mass parts, and antifoam content is 0.5～2 mass parts; Hydraulic material content is that 50～100 mass parts, filler and fine content are 200～300 mass parts in this powder B component; A: B=1: 0.8～2.0.
2, concrete according to claim 1 sulfate resistance maintenance and protection coating, it is characterized in that: the second-order transition temperature of this polymkeric substance is lower than subzero 10 ℃, and solids content is 50%.
3, concrete according to claim 1 sulfate resistance maintenance and protection coating, it is characterized in that: this polymer emulsion is benzene emulsion or acrylic ester emulsion.
4, the preparation method of sulfate resistance maintenance and protection coating of the concrete described in the claim 1, it is characterized in that: comprising: obtaining liq component A: adopt whipping device, in polymer emulsion, add the defoamer of liquid and the dispersion agent of liquid while stirring, up to stirring, use airtight container package then;
Preparation powder B component: in whipping device, add filler and exsiccant fine sand earlier, under whipped state, add hydraulic cementing materials, continue to stir up to evenly moistureproof airtight package after material sieves adding after;
The preparation protective coating: under agitation the powder B component is added among the liquid ingredient A, this liquid ingredient A and powder B component mass ratio are A: B=1: 0.8～2.0, continue to be stirred to after adding evenly.
5, concrete according to claim 1 sulfate resistance maintenance and protection coating, it is characterized in that: the method whether described check polymer emulsion is suitable for comprises:
For with the polymer emulsion that occurs demulsifying phenomenon after hydraulic cementing materials mixes, improve by the method for adding a small amount of nonionic emulsifier, and use the method for stating again and check its suitability.
6, arbitrary described concrete is characterized in that: comprising with the using method of sulfate resistance maintenance and protection coating in the claim 1 to 3: during construction, earlier in matrix surface brushing primary coat, primary coat adds water by liquid ingredient A and stirs and form; Then even mixed material is coated on clean matrix surface; Repeat coating pitch time, second road of coating and the construction in each road are later on carried out later in the preceding coating drying of construction together.
7, the concrete according to claim 6 using method of sulfate resistance maintenance and protection coating, it is characterized in that: one time the coatings formulated total amount used up in 2 hours; The volume ratio of A component and water is 2: 1 in the primary coat; Repeat to be coated with 2～4 times, each pitch time is more than 4 hours.
8, arbitrary described concrete is characterized in that: comprising: when coating uses as concrete pouring, clearly do not have the state of free water to construct at concrete surface with the using method of sulfate resistance maintenance and protection coating in the claim 1 to 3; In addition, in conjunction with determining coating application opportunity concrete time of coagulation;
Second road of coating and the construction in each road are later on carried out later in the preceding coating drying of construction together;
For the protection of later stage concrete structure, on the moist concrete basal plane, do not use primary coat, the first road coating of directly constructing; For the exsiccant concrete surface, use earlier one primary coat, treat primary coat drying each road coating after the construction more later on, one coating in back is in the construction more later on of preceding one coating drying.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101106470A CN100567199C (en) | 2005-11-23 | 2005-11-23 | A kind of coating for concrete for maintenance and protection and preparation using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101106470A CN100567199C (en) | 2005-11-23 | 2005-11-23 | A kind of coating for concrete for maintenance and protection and preparation using method thereof |
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| CN1970490A CN1970490A (en) | 2007-05-30 |
| CN100567199C true CN100567199C (en) | 2009-12-09 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103694804B (en) * | 2012-09-27 | 2017-01-18 | 湖北中科博策新材料研究院 | Two-component aqueous antirust quick-drying paint |
| CN105130321B (en) * | 2015-07-10 | 2018-05-29 | 昆明风行防水材料有限公司 | A kind of polymer cement waterproof paint that can be used under low temperature environment |
| CN106396572A (en) * | 2016-08-30 | 2017-02-15 | 福州金博建材有限公司 | Coating product for exterior wall decoration |
| CN110330284A (en) * | 2019-04-24 | 2019-10-15 | 武汉理工大学 | A kind of polymer modified concrete surface preventing material and preparation method thereof |
| CN115677276A (en) * | 2022-10-18 | 2023-02-03 | 东南大学 | Chlorine-resistant hydrophobic protective coating for surface of cement-based material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141895A (en) * | 1995-08-03 | 1997-02-05 | 中信国安防腐新技术责任有限公司 | Aqueous-emulsion type co-mixed anti-corrosion anti-rust material, mortar and production method thereof |
| FR2790754A1 (en) * | 1999-03-09 | 2000-09-15 | Gerard Noale | Composition for forming adhesive paste or coating, for use in building industry, comprises paste containing hydroxy propyl methyl cellulose, organic binder, plasticizer, fillers and preservative |
| CN1454142A (en) * | 2000-08-14 | 2003-11-05 | 格雷斯公司 | Particle coated bonding systems for hydratable cementitious composition casting and methods for making same |
| JP2004262748A (en) * | 2003-02-14 | 2004-09-24 | Ube Ind Ltd | Polymer cement composition for waterproofing |
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2005
- 2005-11-23 CN CNB2005101106470A patent/CN100567199C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141895A (en) * | 1995-08-03 | 1997-02-05 | 中信国安防腐新技术责任有限公司 | Aqueous-emulsion type co-mixed anti-corrosion anti-rust material, mortar and production method thereof |
| FR2790754A1 (en) * | 1999-03-09 | 2000-09-15 | Gerard Noale | Composition for forming adhesive paste or coating, for use in building industry, comprises paste containing hydroxy propyl methyl cellulose, organic binder, plasticizer, fillers and preservative |
| CN1454142A (en) * | 2000-08-14 | 2003-11-05 | 格雷斯公司 | Particle coated bonding systems for hydratable cementitious composition casting and methods for making same |
| JP2004262748A (en) * | 2003-02-14 | 2004-09-24 | Ube Ind Ltd | Polymer cement composition for waterproofing |
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Granted publication date: 20091209 Termination date: 20121123 |