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 PDF

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Publication number
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
concrete
parts
hydrophobic coating
concrete material
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CN201710024907.5A
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CN106747655A (en
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韩杰
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Liaoning Shihua University
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Liaoning Shihua University
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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
    • 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

A kind of anti-corrosion coating process of porous concrete material
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.
CN201710024907.5A 2017-01-13 2017-01-13 A kind of anti-corrosion coating process of porous concrete material Active CN106747655B (en)

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CN115947570B (en) * 2022-12-15 2024-04-02 哈尔滨工业大学（深圳） Toughened corrosion-resistant concrete and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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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