CN106747655B - A kind of anti-corrosion coating process of porous concrete material - Google Patents
A kind of anti-corrosion coating process of porous concrete material Download PDFInfo
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- CN106747655B CN106747655B CN201710024907.5A CN201710024907A CN106747655B CN 106747655 B CN106747655 B CN 106747655B CN 201710024907 A CN201710024907 A CN 201710024907A CN 106747655 B CN106747655 B CN 106747655B
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- coating liquid
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- concrete material
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/63—Macromolecular compounds
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4853—Epoxides
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5035—Silica
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
The present invention relates to a kind of anti-corrosion coating process of porous concrete material comprising following step: preparing hydrophobic coating liquid, porous concrete material is impregnated in the hydrophobic coating liquid of configuration, complete the preliminary attachment of concrete coating;Slowly lifting concrete, the coating liquid for being full of concrete inner pore are flowed out by concrete base aperture, and coating liquid is made slowly to form a film at the three phase boundary that air, concrete surface form;The concrete material of covering coated film is transferred in the environment of 5 DEG C ~ 45 DEG C of temperature, humidity 0 ~ 90% and is conserved;Diluent is set gradually to volatilize, the hardening of coating liquid film.This, in celluar concrete inner pore surface filming, keeps inside concrete dry using hydrophobic coating material using coating hydrophobicity, makes concrete material and environment to isolation, reduces the erosion of water, salt to concrete.
Description
Technical field
The present invention relates to building fields, more particularly to a kind of corrosion proof method of raising porous concrete material.
Background technique
With the gradually propulsion of modernization of urban construction, road, the bridge in city etc. are gradually blocked water by concrete etc.
Replaced material, although it is convenient and fast means of transportation, offer convenience to resident living.Conventional pav emphasizes the firm resistance to of ground
With and bearing capacity, but also bring some problems to the ecological environment in city simultaneously.Such as recharge of ground water problem, urban precipitation product
Water problems, urban transportation noise problem and " tropical island effect " problem etc..
The drawbacks of for conventional pav pavement material, porous cement concrete appears in urban construction.It is coarse aggregate
Between particle by cement slurry film layer it is cementing made of skeleton gap structure.Its while meeting certain mechanical strength,
Preferable ventilative, permeable, acoustical absorbance properties are shown because of the internal a large amount of holes that there is connection.But it is also due to it to exist largely
Hole, and enable rainwater absorption, be detained.With reciprocal Frozen-thawed cycled, the intensity of porous concrete material can be gradually
Loss, this is unfavorable to the stabilization of structure.The shortcomings that cold resistance is also to influence this material to apply in season jelly property weather
Main cause.The chemistry that tensile stress and local hypersaline environment of the frozen-thaw process intensity main loss in Frozen-thawed cycled generate is invaded
Erosion.Therefore, pore interior concrete bare area how is reduced, is to promote porous concrete material to apply in season jelly property environment
One of critical issue.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, provides a kind of hydrophobic painting treatment of utilization, improves high
Permeate the method for celluar concrete durability.This, in celluar concrete inner pore surface filming, is utilized using hydrophobic coating material
Coating hydrophobicity keeps inside concrete dry, is isolated concrete material with environment, reduces water, salt invades concrete
Erosion.
Technical scheme is as follows:
Step 1: preparing hydrophobic coating liquid, by adjusting each ingredient of coating liquid, coating liquid is made to have hydrophobicity, angle of wetting 5o~90o;
Step 2: porous concrete material is impregnated in the hydrophobic coating liquid of configuration, is coated its inner pore surface
Liquid infiltration, completes the preliminary attachment of concrete coating;
Step 3: after coating liquid completes attachment on concrete inner pore surface, concrete is slowly lifted, is made in concrete
The coating liquid that hole is full of is flowed out by concrete base aperture, and three phase boundaries for forming coating liquid in air, concrete surface
It slowly forms a film at face;
Step 4: the concrete material of covering coated film is transferred in the environment of 5 DEG C ~ 45 DEG C of temperature, humidity 0 ~ 90% and is supported
Shield;Diluent is set gradually to volatilize, coating liquid film hardening, film formation time is 1h ~ 120h.
Further include step 5, the coating liquid flowed out in step 3 is recycled, after the object of supplement consumption wherein, recycling.
In the step one, the hydrophobic coating liquid are as follows: at 25 DEG C, 22 parts of epoxy resin is added to 68 parts
In dehydrated alcohol diluent, stir evenly;20 parts of T31 epoxy curing agent are then added, is stirred evenly, what be can be obtained dredges
Water coating liquid.
In the step one, the hydrophobic coating liquid are as follows: at 25 DEG C, 2 parts of ethyl orthosilicate is added to 20 parts
Dehydrated alcohol diluent in, stir evenly, then be added 0.6 part of concentrated ammonia liquor, stir evenly, by this mixed liquor room temperature transfer
It sets, until its pH stable 6.5, sequentially adds 10 parts of dehydrated alcohols, 1.2 parts of concentrated hydrochloric acid, 1 part of trimethylchloro-silicane thereto
Alkane, and be uniformly mixed, it can be obtained hydrophobic coating liquid.
In the step three, pull rate is controlled in the mm/min of 0.2 mm/min ~ 200.
Advantageous effect of the present invention is as follows:
The present invention relates to the hydrophobic coatings that dipping-czochralski method carries out concrete, are first immersed in porous concrete material
In the coating liquid of configuration, then pass through and slowly lift concrete material, coating liquid is made to form a film in inside concrete pore surface, it is more
Remaining coating liquid is flowed out by inside concrete hole to be recycled.This using hydrophobic coating material celluar concrete inner pore surface at
Film keeps inside concrete dry using coating hydrophobicity, makes concrete material and environment to isolation, reduces water, salt to mixed
Coagulate the erosion of soil.
Specific embodiment
Embodiment one:
Using hydrophobicity epoxide resin material as hydrophobic coating
Step 1: coating liquid is prepared.At 25 DEG C, 22 parts of epoxy resin is added to 68 parts of dehydrated alcohol diluent
In, it stirs evenly.20 parts of T31 epoxy curing agent are then added, stirs evenly, can get hydrophobic coating material.
Step 2: by prefabricated more empty concrete materials, porosity 30% is placed at 40 DEG C dry 2h.Remove free moisture
Afterwards, prefabricated components are immersed in the coating liquid of step 1 preparation, ambient temperature-stable is at 25 DEG C, residence time 25min.
Step 3: it by prefabricated components with the speed of 2cm/min by being sling in immersion slot, and is transferred at shady and cool drying and puts
It sets.After 72h, more sky concrete inner surfaces can form hydrophobicity epoxy resin thin film.
Step 4: the epoxy resin coating liquid reusable recycled in step 2.
Corrosion resistance test: after epoxy resin coats, concrete self-corrosion of (28 days) in 15% metabisulfite solution is electric
Position is by the non-coating of -0.2915V() increase to -0.2723V(coating), the probability that concrete is corroded reduces.
Embodiment two:
Using hydrophobic silica material as hydrophobic coating
Step 1: coating liquid is prepared.
At 25 DEG C, 2 points of ethyl orthosilicate is added in 20 parts of dehydrated alcohol diluent, is stirred evenly.Then add
Enter 0.6 part of concentrated ammonia liquor, stirs evenly.This mixed liquor is placed at room temperature, until its pH stable is 6.5.It sequentially adds thereto
10 parts of dehydrated alcohols, 1.2 parts of concentrated hydrochloric acid, 1 part of trim,ethylchlorosilane, and be uniformly mixed, finally obtain coating liquid.
Step 2: by prefabricated more empty concrete materials, porosity 40% is placed at 40 DEG C dry 5h.Remove free moisture
Afterwards, prefabricated components are immersed in the coating liquid of step 1 preparation, ambient temperature-stable is at 25 DEG C, residence time 125min.
Step 3: it by prefabricated components with the speed of 14cm/min by being sling in immersion slot, and is transferred at shady and cool drying and puts
It sets.After 72h, more sky concrete inner surfaces can form hydrophobic silica film.
Step 4: the hydrophobic silica coating liquid reusable recycled in step 2.
Corrosion resistance test: after concrete surface coating silicon dioxide, (28 days) is certainly rotten in 15% metabisulfite solution
Current potential is lost by the non-coating of -0.2915V() increase to -0.2517V(coating), the probability being corroded reduces.
Embodiment three:
Described being transferred in the environment of 5 DEG C of temperature, humidity 0 to the concrete material of covering coated film conserves;Make to dilute
Agent is gradually volatilized, the hardening of coating liquid film, film formation time 1h.
The pull rate is controlled in 0.2 mm/min.Other steps are the same as embodiment 1.
Corrosion resistance test: after epoxy resin coats, concrete self-corrosion of (28 days) in 15% metabisulfite solution is electric
Position is by the non-coating of -0.2915V() increase to -0.2675V(coating), the probability being corroded reduces.
Example IV
The described concrete material to covering coated film be transferred to temperature 45 C, humidity 90% environment in conserve;Make dilute
It releases agent gradually to volatilize, the hardening of coating liquid film, film formation time 120h.
The pull rate is controlled in 200 mm/min.Other steps are the same as embodiment 2.
Corrosion resistance test: after concrete surface coating silicon dioxide, (28 days) is certainly rotten in 15% metabisulfite solution
Current potential is lost by the non-coating of -0.2915V() increase to -0.2481V(coating), the probability being corroded reduces.
Claims (3)
1. a kind of anti-corrosion coating process of porous concrete material, it is characterised in that include the following steps:
Step 1: preparing hydrophobic coating liquid, by adjusting each ingredient of coating liquid, coating liquid is made to have hydrophobicity, angle of wetting 5 o~
90o;
Step 2: porous concrete material is impregnated in the hydrophobic coating liquid of configuration, its inner pore surface is made to be coated liquid leaching
Profit completes the preliminary attachment of concrete coating;
Step 3: after coating liquid completes attachment on concrete inner pore surface, concrete is slowly lifted, concrete inner pore is made
The coating liquid being full of is flowed out by concrete base aperture, and makes coating liquid at the three phase boundary that air, concrete surface form
Slowly film forming;
Step 4: the concrete material of covering coated film is transferred in the environment of 5 DEG C ~ 45 DEG C of temperature, humidity 0 ~ 90% and is conserved;
Diluent is set gradually to volatilize, coating liquid film hardening, film formation time is 1h ~ 120h;
In the step one, the preparation of hydrophobic coating liquid includes two ways, and one way in which is the hydrophobic coating
Liquid are as follows: at 25 DEG C, 22 parts of epoxy resin is added in 68 parts of dehydrated alcohol diluent, is stirred evenly;T31 is then added
It 20 parts of epoxy curing agent, stirs evenly, the hydrophobic coating liquid that can be obtained;
The manner of formulation of another hydrophobic coating liquid is the hydrophobic coating liquid are as follows: at 25 DEG C, by 2 parts of ethyl orthosilicate
It is added in 20 parts of dehydrated alcohol diluent, stirs evenly, be then added 0.6 part of concentrated ammonia liquor, stir evenly, by this mixed liquor
It places at room temperature, until its pH stable 6.5, sequentially adds 10 parts of dehydrated alcohols, 1.2 parts of concentrated hydrochloric acid, the three of 1 part thereto
Methylchlorosilane, and be uniformly mixed, it can be obtained hydrophobic coating liquid.
2. a kind of anti-corrosion coating process of porous concrete material according to claim 1, it is characterised in that further include step
Rapid five, the coating liquid flowed out in step 3 is recycled, after the object of supplement consumption wherein, recycling.
3. a kind of anti-corrosion coating process of porous concrete material according to claim 1, it is characterised in that the step
In rapid three, pull rate is controlled in the mm/min of 0.2 mm/min ~ 200.
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101033150A (en) * | 2007-02-09 | 2007-09-12 | 重庆大学 | Method of modifying porous vegetation concrete pore alkalinity |
CN101445655A (en) * | 2007-11-30 | 2009-06-03 | 瓦克化学股份公司 | Aqueous dispersions of organosilicon compounds |
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101033150A (en) * | 2007-02-09 | 2007-09-12 | 重庆大学 | Method of modifying porous vegetation concrete pore alkalinity |
CN101445655A (en) * | 2007-11-30 | 2009-06-03 | 瓦克化学股份公司 | Aqueous dispersions of organosilicon compounds |
Non-Patent Citations (1)
Title |
---|
"毛竹NFC/SiO2气凝胶的制备和疏水改性";李婧等;《纤维素科学与技术》;20160129;第24卷(第1期);第49页倒数3行-50页2行 |
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