CN105504907A - Polyaniline-modified cement-based antirust paint and preparation method and application thereof - Google Patents
Polyaniline-modified cement-based antirust paint and preparation method and application thereof Download PDFInfo
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- CN105504907A CN105504907A CN201610004844.2A CN201610004844A CN105504907A CN 105504907 A CN105504907 A CN 105504907A CN 201610004844 A CN201610004844 A CN 201610004844A CN 105504907 A CN105504907 A CN 105504907A
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- polyaniline
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
- C09D1/08—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement with organic additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Abstract
The invention discloses polyaniline-modified cement-based antirust paint for concrete steel bars and a preparation method and application of the antirust paint. The antirust paint is prepared from 100 wt% of cement, 0.5-3 wt% of polyaniline, 1-3 wt% of a rust inhibitor, 0-15 wt% of an ethylene-vinyl acetate copolymer, 0.5-1 wt% of a water reducing agent, 0-0.22 wt% of retarder and 35-55 wt% of water by taking the cement mass as a criterion. The properties of the cement-based antirust paint are improved by improving the characteristics such as the positive potential of the steel bar surface through the polyaniline. A steel bar coated with the antirust paint is not rusted after being soaked in a 3.5 wt% NaCl solution for 3 months, the bond stress is larger than the bond stress between concrete and a bare steel bar, and the longest working time reaches up to 2 hours.
Description
Technical field
The invention belongs to the environment-friendly type coating field of building and metal rust preventing, be specifically related to a kind of rust proof paint for concrete reinforcement and preparation method thereof and engineer applied.
Background technology
In coastal and islands and reefs engineering construction, because the engineering construction cycle is long, there is many periods every construction, cause the reinforcing bar of most of pre-arranged exposed for a long time and under salt fog weather effect, the serious corrosion of reinforcing bar also affects the weather resistance of steel reinforcement bearing capacity and skeleton construction.If reinforcement in concrete generation corrosion, can have a strong impact on concrete intensity and weather resistance, reason is that steel bar corrosion has the harm of following three aspects: 1. the supporting capacity reducing structure, reduces safety margin; 2. reduce the rigidity of structure, increase distortion, even make concrete cover peel off, impact normally uses; 3. reduce the ductility of structure, even change its form, cause engineering accident.Therefore, steel bar corrosion is one of destructive factor of skeleton construction most.According to statistics, in all structure deteriorates, reinforcement corrosion destroys and accounts for 55%.The U.S. reaches 2,500 hundred million dollars for the reparation expense of steel reinforced concrete erosion every year, and Canadian whole reparation expense is more than 5,000 hundred million dollars, and the annual corrosion loss of China also reaches 1800 ~ 3,600 hundred million yuan.
The corrosion of reinforced concrete works mainly occurs in two stages: mainly before concrete placement, because reinforcing bar exposes for a long time, by coastal salt fog weather, rainwater and weather effect, is easy to produce big area corrosion; Next is after concrete placement, causes the steel bar corrosion in Steel Concrete due to a variety of causes.
In the rust proof paint announced; application number is " a kind of antistatic environment-friendly polyaniline protective system " of 201310346415.X; by epoxy resin, liquid fat race polyamine, polyaniline, triphenylphosphate, aniline, methyl-silicone oil etc. for raw material obtains through each raw material stirring processing under nitrogen protection, coating is pollution-free.But can bonding strength be had a strong impact on owing to adding epoxy resin, easily cause reinforcing bar to be separated with concrete interface, in addition, in coating, polyaniline content is high, cost is higher, and electro-chemical test aspect is only because improve open circuit potential 200mV completely antiseptic property can not be described; Application number is that CN201010226027.4 provides dye adulterated polyaniline of a kind of resistance to dedoping and its preparation method and application, utilize sulfonic group etc. can to adulterate group doped polyaniline, the resistance to dedoping ability that the groups such as amino, alkylamino radical and azo-group improve doped polyaniline is introduced in doping agent, be easy to form layer/polyaniline conductive coating, be applied to the fields such as anti-corrosion of metal, environmental protection treatment, catalytic material, photoelectric material, conductive plastics, but, there is the shortcoming that solubleness is little, poor adhesive force, cost are high in this polyaniline anti-corrosive paint.Application number is CN201410134593.0 " a kind of under water or the polyaniline anti-corrosive paint of wet structure and preparation method thereof ", be made up of epoxy resin, modifier, polyaniline, inhibiter, auxiliary agent, color stuffing, solidifying agent etc., coating nontoxic pollution-free, to human body, environmentally friendly, antiseptic property is lasting under water, but coating surface is level and smooth, the reinforcing bar of coating pliable and tough high resilience impact and concrete rigidity.Application number is " the high-performance water-based polyaniline anti-corrosive paint and method for making and application " thereof of CN201410166283.7, be made up of the polyaniline of Watery film-fomer, doping state water dispersible and solidifying agent etc., there is the coating of excellent antiseptic property and environmental protection, but do not relate in coating and bonding strength, the construction site of coastland limits application; Application number is " the anticorrosion mastic coatings synthetic method of a kind of aqueous polyanion " of CN201410579214.9, joins in paint mixing tank by polymer emulsion, aqueous polyanion, anticorrosive packing and auxiliary agent, through stirring, makes after high speed dispersion is even.Preparation method for coating is simple, and cost is low, easy to control, and the anticorrosion mastic coatings of aqueous polyanion of synthesis has satisfactory stability, high temperature resistant, oxidation-resistance, and fast drying.But the blocked up workability that can affect coating application of paint slurry, limits its widespread use.Application number is CN2015103746121 " a kind of cement-base concrete reinforced steel bar rust preventing coating and its preparation method and application ", disclose a kind of rust proof paint that still can not be able to get rusty when saline soak reaches 3 months, this rust proof paint passes through the bond stress between the strong cohesive property Concrete Structure of ethene-vinyl acetate (EVA) and reinforcing bar.
Summary of the invention
Goal of the invention: for the deficiencies in the prior art, an object of the present invention is to provide a kind of polyaniline-modified cement based rust proof paint for Steel Concrete, to improve the antirust ability of coating, bond stress, mobility and weather resistance etc.; Another object of the present invention is also the preparation method providing this cement based rust proof paint; Another object of the present invention is the application providing this cement based rust proof paint.
Technical scheme: for achieving the above object, the present invention by the following technical solutions:
A polyaniline-modified cement based rust proof paint, comprises cement, rust inhibitor, ethylene-vinyl acetate copolymer, water reducer, retardant and water, also comprises polyaniline.
Take cement quality as benchmark, the mass percent of each component is: cement 100wt%, polyaniline 0.5 ~ 3wt%, rust inhibitor 1 ~ 3wt%, ethylene-vinyl acetate copolymer 0 ~ 15wt%, water reducer 0.5 ~ 1wt%, retardant 0 ~ 0.22wt% and water 35 ~ 55wt%.
Further, take cement quality as benchmark, the mass percent of each component is: cement 100wt%, polyaniline 1 ~ 3wt%, rust inhibitor 2 ~ 3wt%, ethylene-vinyl acetate copolymer 10 ~ 15wt%, water reducer 0.5 ~ 0.7wt%, retardant 0.18 ~ 0.22wt%, water 35 ~ 45wt%.
Further, take cement quality as benchmark, the mass percent of each component is: cement 100wt%, polyaniline 3wt%, rust inhibitor 3wt%, naphthalene system powder water reducer 0.5wt%, sodium lignosulfonate 0.2wt% and water 40wt%, wherein sodium lignosulfonate is retardant.When polyaniline is 3wt%, EVA volume is now 0, because polyaniline volume is too high, now adding EVA can improve water requirement greatly.Adding EVA is from the viewpoint of EVA emulsion cohesive force strong increase bond stress, and adding polyaniline is because be attract to increase bond stress from the large π bond structure of its uniqueness and positive and negative charge.
Further, described cement is selected from the one in ordinary Portland cement, silicate cement, slag cement, trass cement or aluminosulfate cement, and wherein, as preferably, cement is selected from the ordinary Portland cement of strength grade 52.5.
Further, described polyaniline is selected from the one in polyaniline in eigenstate, oxidation state polyaniline or reduction-state polyaniline, and wherein, as preferably, polyaniline is selected from reduction-state polyaniline.
Further, described rust inhibitor is selected from the one of mixing in type JK-H2O compounded amino alcohol, RI reinforcing steel bar corrosion inhibitor, COR anti-corrosive rust inhibitor, lime acetate or Sodium Benzoate, and wherein, as preferably, rust inhibitor is selected from RI reinforcing steel bar corrosion inhibitor.
Further, described water reducer is selected from the one in naphthalene system powder water reducer or poly carboxylic acid, and wherein, as preferably, water reducer is naphthalene system powder water reducer.
Further, described retardant is selected from the one in molasses retardant, hydroxycarboxylic acid and its esters retardant or lignin sulfonate retardant, wherein, as preferably, retardant is the one in hydroxycarboxylic acid and its esters retardant and lignin sulfonate retardant.
Present invention further proposes the preparation method of above-mentioned polyaniline-modified cement based rust proof paint, comprise the following steps:
(1) raw material is prepared according to the mass percent of the above-mentioned polyaniline-modified each component of cement based rust proof paint;
(2) first the water reducer in raw material and water are proportionally mixed;
(3) thereupon, add polyaniline and the ethene-vinyl acetate copolymer of preparation, stir, obtain uniform emulsion;
(4) last, the cement got ready and rust inhibitor are added in the emulsion that step (3) obtains, after stirring 1-2min, add retardant and rapid stirring 10-15min, both product.
Present invention also offers the application of above-mentioned polyaniline-modified cement based rust proof paint, above-mentioned rust proof paint is used for the antirust of coastal engineering construction exposed reinforcement.Due to coastal and the islands and reefs engineering construction cycle is long, there is many periods every construction, cause the reinforcing bar of most of pre-arranged exposed for a long time and under salt fog weather effect, the serious corrosion of reinforcing bar also affects the weather resistance of steel reinforcement bearing capacity and skeleton construction.Above-mentioned polyaniline-modified cement based rust proof paint being coated on the reinforcing bar of coastal engineering construction site, for slowing down the corrosion of reinforcing bar, not reducing the bond stress between reinforcing bar and concrete simultaneously.
Beneficial effect: compared with prior art, by adding polyaniline and mutually acting synergistically with other components, polyaniline-modified cement based rust proof paint of the present invention and its preparation method and application, has the following advantages:
(1) rustless property of coating is increased by adding rust-preventive agent, electric field action is formed by reduction-state polyaniline and rebar surface unbound electron, make the electrochemical corrosion potential of metal form normotopia move thus improve the electrochemical corrosion potential of reinforcing bar, play passivation, polyaniline contains multiple hybridized orbital that can provide π-electron and lone-pair electron, form coordinate bond with metallic iron thus play corrosion inhibition, the above effect of polyaniline further increases the antirust ability of coating, rust proof paint provided by the invention is coated on the reinforcing bar of coastal engineering construction site, even if under severe salt mist environment (as soaked 3 months in the NaCl solution of 3.5wt%), expiring, it is in confused situation aobvious to find that reinforcing bar gets rusty when constructing,
(2) contradiction such as mobility and bleeding, mobility and intensity is solved by adding water reducer; Bonding strength can be improved; The prolonged flow of coating is improved by adding retardant, solve the contradiction between paint-flow and engineering time, construction temperature, meet the requirement of coating application operability, the described cement based coating provided by the invention the longest working hour can reach 2 hours, can meet the needs of extensive construction completely;
(3) utilize polyaniline and rebar surface unbound electron to form electric field action, promote the bond stress between reinforcing bar and concrete further; Adopt cement and the overall aquation of later stage casting concrete, be unlikely to form two-phase interface and reduce bond stress; By improving reinforcing bar, coating, cement three phase boundary, interface is made to have the flexibility of polymer coating and the rigidity of cement concurrently, thus making the maximization that bond stress and rustless property reach overall, rust proof paint of the present invention makes bonding strength be greater than bond stress between concrete and naked reinforcing bar;
(4) inexpensive, the economic environmental protection of rust proof paint raw material provided by the invention.
Embodiment
Below in conjunction with embodiment, further explanation is explained to the present invention.
Embodiment 1
A kind of polyaniline-modified cement based rust proof paint, take cement quality as benchmark, consisting of of each component: the ordinary Portland cement 1kg (100wt%) of strength grade 52.5, polyaniline 10g (1wt%), RI reinforcing steel bar corrosion inhibitor 30g (3wt%), naphthalene system powder water reducer 5g (0.5wt%), sodium lignosulfonate 2g (0.2wt%), water 400g (40wt%).Being prepared by preparation method of the present invention, carrying out the viscosity test after viscosity test and 1h with being coated with-4 glasss of viscosmeters.Then with the hairbrush of 25mm, the rust proof paint prepared is coated in the surface of reinforcing bar, salt brine solution bar dowel being put into 3.5wt% after placing 7d carries out antirust experiment, the industry standard (JTJ270-98 " marine traffic engineering concrete test code ") of being tested by bond stress by the concrete of long reinforcing bar C50 again carries out building mould, the demoulding after 48h at 20 DEG C, maintenance 28d in the curing room of humidity 100%, finally carries out bond stress test.In the present embodiment, the viscosity of rust proof paint, rustless property and bond stress results of property are in table 1.
Embodiment 2
A kind of polyaniline-modified cement based rust proof paint, raw material consists of: the ordinary Portland cement 1kg (100wt%) of strength grade 52.5, polyaniline 20g (2wt%), RI reinforcing steel bar corrosion inhibitor 30g (3wt%), naphthalene system powder water reducer 5g (0.5wt%), sodium lignosulfonate 2g (0.2wt%), water 400g (40wt%).Being prepared by preparation method of the present invention, carrying out the viscosity test after viscosity test and 1h with being coated with-4 glasss of viscosmeters.Then with the hairbrush of 25mm, the rust proof paint prepared is coated in the surface of reinforcing bar, salt brine solution bar dowel being put into 3.5wt% after placing 7d carries out antirust experiment, the industry standard (JTJ270-98 " marine traffic engineering concrete test code ") of being tested by bond stress by the concrete of long reinforcing bar C50 again carries out building mould, after 48h, the demoulding is at 20 DEG C, maintenance 28d in the curing room of humidity 100%, finally carries out bond stress test.In the present embodiment, the viscosity of rust proof paint, rustless property and bond stress results of property are in table 1.
Embodiment 3
A kind of polyaniline-modified cement based rust proof paint, raw material consists of: the ordinary Portland cement 1kg (100wt%) of strength grade 52.5, polyaniline 30g (3wt%), RI reinforcing steel bar corrosion inhibitor 30g (3wt%), naphthalene system powder water reducer 5g (0.5wt%), sodium lignosulfonate 2g (0.2wt%), water 400g (40wt%).Being prepared by preparation method of the present invention, carrying out the viscosity test after viscosity test and 1h with being coated with-4 glasss of viscosmeters.Then with the hairbrush of 25mm, the rust proof paint prepared is coated in the surface of reinforcing bar, salt brine solution bar dowel being put into 3.5wt% after placing 7d carries out antirust experiment, the industry standard (JTJ270-98 " marine traffic engineering concrete test code ") of being tested by bond stress by the concrete of long reinforcing bar C50 again carries out building mould, after 48h, the demoulding is at 20 DEG C, maintenance 28d in the curing room of humidity 100%, finally carries out bond stress test.In the present embodiment, the viscosity of rust proof paint, rustless property and bond stress results of property are in table 1.
Embodiment 4
A kind of polyaniline-modified cement based rust proof paint, raw material consists of: the ordinary Portland cement 1kg (100wt%) of strength grade 52.5, polyaniline 5g (0.5wt%), RI reinforcing steel bar corrosion inhibitor 5g (0.5wt%), ethylene-vinyl acetate copolymer 100g (10wt%), naphthalene system powder water reducer 7g (0.7wt%), sodium lignosulfonate 2g (0.2wt%), water 450g (45wt%).Being prepared by preparation method of the present invention, carrying out the viscosity test after viscosity test and 1h with being coated with-4 glasss of viscosmeters.Then with the hairbrush of 25mm, the rust proof paint prepared is coated in the surface of reinforcing bar, salt brine solution bar dowel being put into 3.5wt% after placing 7d carries out antirust experiment, the industry standard (JTJ270-98 " marine traffic engineering concrete test code ") of being tested by bond stress by the concrete of long reinforcing bar C50 again carries out building mould, after 48h, the demoulding is at 20 DEG C, maintenance 28d in the curing room of humidity 100%, finally carries out bond stress test.In the present embodiment, the viscosity of rust proof paint, rustless property and bond stress results of property are in table 1.
Embodiment 5
A kind of polyaniline-modified cement based rust proof paint, raw material consists of: the ordinary Portland cement 1kg (100wt%) of strength grade 52.5, polyaniline 10g (1wt%), RI reinforcing steel bar corrosion inhibitor 5g (0.5wt%), ethylene-vinyl acetate copolymer 100g (10wt%), naphthalene system powder water reducer 7g (0.7wt%), sodium lignosulfonate 2g (0.2wt%), water 450g (45wt%).Being prepared by preparation method of the present invention, carrying out the viscosity test after viscosity test and 1h with being coated with-4 glasss of viscosmeters.Then with the hairbrush of 25mm, the rust proof paint prepared is coated in the surface of reinforcing bar, salt brine solution bar dowel being put into 3.5wt% after placing 7d carries out antirust experiment, the industry standard (JTJ270-98 " marine traffic engineering concrete test code ") of being tested by bond stress by the concrete of long reinforcing bar C50 again carries out building mould, after 48h, the demoulding is at 20 DEG C, maintenance 28d in the curing room of humidity 100%, finally carries out bond stress test.In the present embodiment, the viscosity of rust proof paint, rustless property and bond stress results of property are in table 1.
Embodiment 6
A kind of polyaniline-modified cement based rust proof paint, raw material consists of: the ordinary Portland cement 1kg (100wt%) of strength grade 52.5, polyaniline 15g (1.5wt%), RI reinforcing steel bar corrosion inhibitor 5g (0.5wt%), ethylene-vinyl acetate copolymer 100g (10wt%), naphthalene system powder water reducer 7g (0.7wt%), sodium lignosulfonate 2g (0.2wt%), water 450g (45wt%).Being prepared by preparation method of the present invention, carrying out the viscosity test after viscosity test and 1h with being coated with-4 glasss of viscosmeters.Then with the hairbrush of 25mm, the rust proof paint prepared is coated in the surface of reinforcing bar, salt brine solution bar dowel being put into 3.5wt% after placing 7d carries out antirust experiment, the industry standard (JTJ270-98 " marine traffic engineering concrete test code ") of being tested by bond stress by the concrete of long reinforcing bar C50 again carries out building mould, after 48h, the demoulding is at 20 DEG C, maintenance 28d in the curing room of humidity 100%, finally carries out bond stress test.In the present embodiment, the viscosity of rust proof paint, rustless property and bond stress results of property are in table 1.
Embodiment 7
A kind of polyaniline-modified cement based rust proof paint, raw material consists of: the ordinary Portland cement 1kg (100wt%) of strength grade 52.5, polyaniline 10g (1wt%), RI reinforcing steel bar corrosion inhibitor 5g (0.5wt%), ethylene-vinyl acetate copolymer 50g (5wt%), naphthalene system powder water reducer 7g (0.7wt%), sodium lignosulfonate 2g (0.2wt%), water 450g (45wt%).Being prepared by preparation method of the present invention, carrying out the viscosity test after viscosity test and 1h with being coated with-4 glasss of viscosmeters.Then with the hairbrush of 25mm, the rust proof paint prepared is coated in the surface of reinforcing bar, salt brine solution bar dowel being put into 3.5wt% after placing 7d carries out antirust experiment, the industry standard (JTJ270-98 " marine traffic engineering concrete test code ") of being tested by bond stress by the concrete of long reinforcing bar C50 again carries out building mould, after 48h, the demoulding is at 20 DEG C, maintenance 28d in the curing room of humidity 100%, finally carries out bond stress test.In the present embodiment, the viscosity of rust proof paint, rustless property and bond stress results of property are in table 1.
Embodiment 8
A kind of polyaniline-modified cement based rust proof paint, raw material consists of: the ordinary Portland cement 1kg (100wt%) of strength grade 52.5, polyaniline 10g (1wt%), RI reinforcing steel bar corrosion inhibitor 5g (0.5wt%), ethylene-vinyl acetate copolymer 150g (15wt%), naphthalene system powder water reducer 7g (0.7wt%), sodium lignosulfonate 2g (0.2wt%), water 450g (45wt%).Being prepared by preparation method of the present invention, carrying out the viscosity test after viscosity test and 1h with being coated with-4 glasss of viscosmeters.Then with the hairbrush of 25mm, the rust proof paint prepared is coated in the surface of reinforcing bar, salt brine solution bar dowel being put into 3.5wt% after placing 7d carries out antirust experiment, the industry standard (JTJ270-98 " marine traffic engineering concrete test code ") of being tested by bond stress by the concrete of long reinforcing bar C50 again carries out building mould, after 48h, the demoulding is at 20 DEG C, maintenance 28d in the curing room of humidity 100%, finally carries out bond stress test.In the present embodiment, the viscosity of rust proof paint, rustless property and bond stress results of property are in table 1.
With the reinforcing bar of uncoated coating for blank, measuring naked bonding strength is 280kN.
The test result of the cement based rust proof paint that one kind, table 1 is polyaniline-modified
As can be seen from Table 1, after rebar surface is coated with rust proof paint prepared by the present invention in embodiment 1-8, in the salt solution of 3.5wt%, soaks 3 months reinforcing bars do not get rusty, the high rust resistance of this coating is described; In rust proof paint prepared by embodiment 1-8 1 hour, viscosity velocity of variation is less than 31.1%, illustrates that the operable time of rust proof paint provided by the invention is long, meets the needs of extensive construction; In embodiment 1-8, coating does not have a negative impact substantially to bonding strength, and the bond stress wherein in embodiment 3 is apparently higher than the bond stress of naked bonding strength.
To sum up, rustless property, the excellent combination property such as bond stress and operable time of polyaniline-modified cement based rust proof paint provided by the invention.Raw material is inexpensive, preparation method is simple, can the coastal construction work of large-scale application under severe environment.
More than describe is for implementing optimal modes more of the present invention and other embodiments; just illustrated example effect is played to technical conceive of the present invention; can not limit the scope of the invention with this; those skilled in the art are not departing from the spirit and scope of technical solution of the present invention; modify and be equal to replacement, all should drop within protection scope of the present invention.
Claims (10)
1. a polyaniline-modified cement based rust proof paint, comprises cement, rust inhibitor, ethylene-vinyl acetate copolymer, water reducer, retardant and water, it is characterized in that: described rust proof paint also comprises polyaniline;
Take cement quality as benchmark, the mass percent of each component is: cement 100wt%, polyaniline 0.5 ~ 3wt%, rust inhibitor 1 ~ 3wt%, ethylene-vinyl acetate copolymer 0 ~ 15wt%, water reducer 0.5 ~ 1wt%, retardant 0 ~ 0.22wt% and water 35 ~ 55wt%.
2. polyaniline-modified cement based rust proof paint according to claim 1, it is characterized in that: described rust proof paint take cement quality as benchmark, and the mass percent of each component is: cement 100wt%, polyaniline 1 ~ 3wt%, rust inhibitor 2 ~ 3wt%, ethylene-vinyl acetate copolymer 10 ~ 15wt%, water reducer 0.5 ~ 0.7wt%, retardant 0.18 ~ 0.22wt% and water 35 ~ 45wt%.
3. polyaniline-modified cement based rust proof paint according to claim 1, it is characterized in that: described rust proof paint take cement quality as benchmark, and the mass percent of each component is: cement 100wt%, polyaniline 3wt%, rust inhibitor 3wt%, naphthalene system powder water reducer 0.5wt%, sodium lignosulfonate 0.2wt% and water 40wt%.
4. polyaniline-modified cement based rust proof paint according to claim 1, is characterized in that: described cement is selected from the one in ordinary Portland cement, silicate cement, slag cement, trass cement or aluminosulfate cement.
5. polyaniline-modified cement based rust proof paint according to claim 1, is characterized in that: described polyaniline is selected from the one in polyaniline in eigenstate, oxidation state polyaniline or reduction-state polyaniline.
6. polyaniline-modified cement based rust proof paint according to claim 1, is characterized in that: described rust inhibitor is selected from the one of mixing in type JK-H2O compounded amino alcohol, RI reinforcing steel bar corrosion inhibitor, COR anti-corrosive rust inhibitor, lime acetate or Sodium Benzoate.
7. polyaniline-modified cement based rust proof paint according to claim 1, is characterized in that: described water reducer is selected from the one in naphthalene system powder water reducer or poly carboxylic acid.
8. polyaniline-modified cement based rust proof paint according to claim 1, is characterized in that: described retardant is selected from the one in molasses retardant, hydroxycarboxylic acid and its esters retardant or lignin sulfonate retardant.
9., based on a preparation method for the polyaniline-modified cement based rust proof paint described in any one of claim 1-8, it is characterized in that: described preparation method comprises the following steps:
(1) mass percent of polyaniline-modified according to any one of the claim 1-8 each component of cement based rust proof paint prepares raw material;
(2) first the water reducer in step (1) raw material and water are mixed;
(3) thereupon, add polyaniline and the ethene-vinyl acetate copolymer of preparation, stir, obtain uniform emulsion;
(4) last, the cement got ready and rust inhibitor are added in the emulsion that step (3) obtains, after stirring 1-2min, add retardant and rapid stirring 10-15min, both product.
10. an application for polyaniline-modified cement based rust proof paint according to claim 1, is characterized in that, described rust proof paint is used for the antirust of coastal engineering construction exposed reinforcement.
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Cited By (3)
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| CN106906476A (en) * | 2017-01-16 | 2017-06-30 | 中国建筑第八工程局有限公司 | A kind of preparation for preventing reinforcing bar to get rusty and preparation method thereof and construction method |
| CN110093915A (en) * | 2019-03-27 | 2019-08-06 | 浙江立鹏建设有限公司 | A kind of bored pile construction method |
| CN112538286A (en) * | 2020-12-04 | 2021-03-23 | 上海泾东建筑发展有限公司 | Antirust coating for construction reserved steel bars and construction method |
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Application publication date: 20160420 |