CN113913036A - Concrete durable coating applied to cold region and high ultraviolet radiation region - Google Patents
Concrete durable coating applied to cold region and high ultraviolet radiation region Download PDFInfo
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- CN113913036A CN113913036A CN202111295305.6A CN202111295305A CN113913036A CN 113913036 A CN113913036 A CN 113913036A CN 202111295305 A CN202111295305 A CN 202111295305A CN 113913036 A CN113913036 A CN 113913036A
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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
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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
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- C09D7/48—Stabilisers against degradation by oxygen, light or heat
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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
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- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
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Abstract
The invention discloses a concrete durable coating applied to a cold region and a high ultraviolet radiation region, which comprises the following raw materials in parts by weight: 40-65 parts of phosphorus-magnesium material, 2-10 parts of expansion source, 3-20 parts of polymer emulsion, 0.2-1 part of uvioresistant agent, 5-10 parts of filling material, 2-5 parts of auxiliary agent and 10-25 parts of water; the coating takes a phosphorus-magnesium inorganic cementing material as a main body, and exerts strong bonding capacity to concrete; the expansion source is added to strengthen the infiltration crystallization performance; the introduction of the water-based polymer material provides deformability of the coating and enhances waterproof capability; the ultraviolet resistance is improved by adding an ultraviolet resistant material; the raw materials interact with each other to form a compact and firmly-adhered anti-permeability coating structure, so that the concrete is protected against freeze thawing and ultraviolet.
Description
Technical Field
The invention relates to the field of road maintenance, in particular to a concrete durability coating applied to a cold region and a high ultraviolet radiation region aiming at the problem of durability of concrete in the cold region and the high ultraviolet radiation region.
Background
The concrete structure in cold regions and high ultraviolet radiation regions is subjected to high-frequency freeze-thaw cycles, dry-wet cycles and strong ultraviolet radiation, so that diseases such as freeze-thaw damage and cracking in the concrete can be caused, and the problem of the durability of the concrete in the regions is obvious. Investigation also shows that the surface of concrete in cold regions and high ultraviolet radiation regions in China is loose and the internal structure is seriously damaged, and the concrete protection in the regions needs to be paid attention urgently. The general protective materials in the market are mainly divided into two types, one type is a rigid waterproof material (such as a cement-based permeable crystallization waterproof material), the components of the rigid waterproof material are similar to those of cement, and active chemical substances are used for permeating cracks on the surface of concrete to generate insoluble ettringite to block gaps. In the high-frequency freeze-thaw cycle process, the deformation performance of the rigid protective material is insufficient, and the bonding interface with concrete is easy to bond and lose efficacy. The organic flexible protective material has excellent waterproof performance, poor light aging performance and insufficient durability.
Patent 202010191444.3 discloses a method for preparing a phosphorus-magnesium-based cement concrete coating protective material and application thereof, wherein the main component is magnesium phosphate cement which is an inorganic gelled material with high brittleness and poor deformation adaptability. Under the action of high-frequency freeze-thaw cycles in alpine regions, phosphate is easy to dissolve out due to the hydrophilicity of the freeze-thaw cycles, and cracking, falling and the like are easy to cause due to insufficient deformability.
Patent 201810870739.6 discloses a magnesium phosphate cement protective coating for concrete fair-faced finish and a preparation method thereof. The protective material consists of a bottom layer coating and a surface layer coating, wherein the bottom layer is magnesium phosphate cement, and the surface layer is silane emulsion. The method utilizes the polymer coating to improve the water resistance problem of the magnesium phosphate cement, but the bonding interface of the concrete substrate and the magnesium phosphate cement protective layer does not provide deformation adaptability, the temperature difference is generated by climate change to cause the deformation of the concrete structure, and the cracking risk of the protective coating is larger; the surface silane is degraded in the strong ultraviolet irradiation environment, and the durability still has a problem.
Disclosure of Invention
In view of the above, the present invention provides a concrete durability coating applied to a cold region and a high ultraviolet radiation region, so as to solve the problem of concrete durability in the cold region and the high ultraviolet radiation region.
The invention relates to a concrete durable coating applied to a cold region and a high ultraviolet radiation region, which comprises the following raw materials in parts by weight: 40-65 parts of phosphorus-magnesium material, 2-10 parts of expansion source, 3-20 parts of polymer emulsion, 0.2-1 part of uvioresistant agent, 5-10 parts of filling material, 2-5 parts of auxiliary agent and 10-25 parts of water;
further, 50 parts of phosphorus-magnesium material, 7 parts of expansion source, 13 parts of polymer emulsion, 0.6 part of anti-ultraviolet agent, 7 parts of filler, 3 parts of auxiliary agent and 16 parts of water;
further, the phosphorus-magnesium material is a mixture of heavy magnesium oxide, a retarder, disodium hydrogen phosphate, potassium dihydrogen phosphate and ferric chloride;
further, the retarder is borax;
further, the expansion source is one or a mixture of more than two of alum, aluminate cement, sulphoaluminate cement and gypsum;
further, the polymer emulsion is one or a mixture of more than two of acrylic acid, polyurethane and water-based epoxy emulsion;
further, the anti-ultraviolet agent is one or a mixture of more than two of an anti-ultraviolet filler and an organic anti-ultraviolet agent, the anti-ultraviolet filler comprises mica titanium dioxide aqueous carbon black, and the organic anti-ultraviolet agent is a hindered amine anti-ultraviolet agent;
further, the filler is one or a mixture of more than two of acidic aggregate mineral powder and admixture, the acidic aggregate mineral powder comprises quartz powder or quartz mineral powder, and the admixture comprises fly ash, slag powder, volcanic ash and metakaolin;
further, the auxiliary agent comprises one or more of a water reducing agent, a flatting agent, a defoaming agent and cellulose ether;
further, the water reducing agent is a polycarboxylic acid water reducing agent; the leveling agent is polyether modified polydimethylsiloxane; the defoaming agent is one or more of an organic silicon defoaming agent, a polyether defoaming agent and polyether modified silicon.
The invention has the beneficial effects that: the durable coating of the concrete, which is applied to cold regions and high ultraviolet radiation regions, takes the phosphorus-magnesium inorganic cementing material as a main body, and exerts strong bonding capacity on the concrete; the expansion source is added to strengthen the infiltration crystallization performance; the introduction of the water-based polymer material provides deformability of the coating and enhances waterproof capability; the ultraviolet resistance is improved by adding an ultraviolet resistant material; the raw materials interact with each other to form a compact and firmly-adhered anti-permeability coating structure, so that the concrete is protected against freeze thawing and ultraviolet.
Drawings
FIG. 1 is a temperature cycling graph of a freeze-thaw resistance test.
Detailed Description
The following examples are provided to further illustrate the present invention for better understanding, but the present invention is not limited to the following examples.
In the examples, the experimental methods used were all conventional methods unless otherwise specified, and the materials, reagents and the like used were commercially available without otherwise specified.
Example one
The concrete durable coating applied to the cold region and the high ultraviolet radiation region comprises the following raw materials in parts by weight: 26.5 parts of heavy magnesium oxide, 23.8 parts of potassium dihydrogen phosphate, 4 parts of borax, 2.6 parts of disodium hydrogen phosphate, 2.6 parts of ferric chloride, 2.6 parts of alum, 0.6 part of gypsum, 4 parts of silicone-acrylic emulsion, 0.6 part of mica powder, 2.6 parts of fly ash, 13.2 parts of quartz sand, 0.60 part of polycarboxylic acid water reducing agent, 0.60 part of polyether modified polydimethylsiloxane, 0.2 part of cellulose ether, 0.3 part of organic silicon defoaming agent and 15.2 parts of water.
Example two
The concrete durable coating applied to the cold region and the high ultraviolet radiation region comprises the following raw materials in parts by weight: 20 parts of heavy magnesium oxide, 28 parts of monopotassium phosphate, 3 parts of borax, 2 parts of disodium hydrogen phosphate, 2 parts of ferric chloride, 3 parts of alum, 0.5 part of gypsum, 2 parts of sulphoaluminate cement, 6.2 parts of polyurethane, 0.5 part of mica powder, 3 parts of fly ash, 10 parts of quartz sand, 0.25 part of polycarboxylic acid water reducing agent, 0.25 part of polyether modified polydimethylsiloxane, 0.10 part of cellulose ether, 0.25 part of polyether defoaming agent and 15.5 parts of water.
EXAMPLE III
The concrete durable coating applied to the cold region and the high ultraviolet radiation region comprises the following raw materials in parts by weight: 25 parts of heavy magnesium oxide, 17.6 parts of potassium dihydrogen phosphate, 3.8 parts of borax, 3.8 parts of disodium hydrogen phosphate, 3.8 parts of ferric chloride, 3.8 parts of alum, 1.25 parts of sulphoaluminate cement, 5 parts of fly ash, 12.5 parts of silicon carbide, 0.6 part of water-based carbon black, 6.3 parts of quartz sand, 0.3 part of polycarboxylic acid water reducing agent, 0.3 part of polyether modified polydimethylsiloxane, 0.15 part of cellulose ether, 0.3 part of organic silicon defoaming agent and 15 parts of water.
Example four
The concrete durable coating applied to the cold region and the high ultraviolet radiation region comprises the following raw materials in parts by weight: 40 parts of phosphorus magnesium material (20 parts of heavy magnesium oxide, 5 parts of potassium dihydrogen phosphate, 5 parts of borax, 5 parts of disodium hydrogen phosphate and 5 parts of ferric chloride), 2 parts of sulphoaluminate cement, 3 parts of waterborne epoxy emulsion containing curing agent, 0.2 part of titanium pigment, 5 parts of filler (3 parts of quartz powder and 2 parts of slag powder), 2 parts of auxiliary agent (0.5 part of polycarboxylic acid water reducing agent, 0.5 part of cellulose ether, 0.5 part of polyether modified polydimethylsiloxane, 0.5 part of organic silicon defoaming agent) and 10 parts of water.
EXAMPLE five
The concrete durable coating applied to the cold region and the high ultraviolet radiation region comprises the following raw materials in parts by weight: 65 parts of phosphorus magnesium material (30 parts of heavy magnesium oxide, 10 parts of potassium dihydrogen phosphate, 10 parts of borax, 5 parts of disodium hydrogen phosphate and 5 parts of ferric chloride), 10 parts of alum, 20 parts of styrene-acrylic emulsion and hindered amine anti-ultraviolet agent (I: (A) (B))UV770)1 part, 10 parts of metakaolin, 5 parts of an auxiliary agent (2 parts of a polycarboxylic acid water reducing agent, 1 part of cellulose ether, 1 part of polyether modified polydimethylsiloxane and 1 part of a polyether defoamer) and 25 parts of water.
EXAMPLE six
The concrete durable coating applied to the cold region and the high ultraviolet radiation region comprises the following raw materials in parts by weight: 50 parts of phosphorus-magnesium material (25 parts of heavy magnesium oxide, 10 parts of potassium dihydrogen phosphate, 5 parts of borax, 5 parts of disodium hydrogen phosphate and 5 parts of ferric chloride), 7 parts of expansion source (4 parts of aluminate cement and 3 parts of sulphoaluminate cement), 13 parts of polymer emulsion (4 parts of silicone-acrylic emulsion, 4 parts of styrene-acrylic emulsion and 5 parts of pure acrylic emulsion), 0.6 part of mica, 7 parts of filler (3 parts of fly ash, 2 parts of slag powder and 2 parts of volcanic ash), 3 parts of auxiliary agent (0.5 part of polycarboxylic acid water reducing agent, 0.5 part of cellulose ether, 1 part of polyether modified polydimethylsiloxane, 1 part of polyether modified silicon defoaming agent) and 16 parts of water.
The test is carried out by adopting a quick freezing method, a standard cured C30 concrete sample is soaked in water for 4 days before freezing and thawing, each freezing and thawing cycle is 3.5 hours, the time for lowering the temperature from 6 ℃ to-15 ℃ is 1.75 hours, the time for raising the temperature from-15 ℃ to 6 ℃ is 1.75 hours, the central temperature of the test piece is controlled to be (-17 +/-2) DEG C and (8 +/-2) DEG C, and the temperature cycle is shown as coating 1.
The equivalent weight of ultraviolet radiation is 448 MJ.m-2The ultraviolet irradiation time is 432 hours, which is equivalent to the maximum annual ultraviolet irradiation amount in domestic areas with larger ultraviolet irradiation. The test results are shown below:
in the above embodiments, the strength of the coating layer of the first embodiment is the best, and the deformation is general; the strength of the coating of the second embodiment is second, the deformation is better; the coating of example three suffers from poor strength and deformation.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. The concrete durable coating applied to cold regions and high ultraviolet radiation regions is characterized by comprising the following raw materials in parts by weight: 40-65 parts of phosphorus-magnesium material, 2-10 parts of expansion source, 3-20 parts of polymer emulsion, 0.2-1 part of uvioresistant agent, 5-10 parts of filling material, 2-5 parts of auxiliary agent and 10-25 parts of water.
2. The concrete durable coating applied to cold regions and high ultraviolet radiation regions as claimed in claim 1, wherein the coating comprises 50 parts of phosphorus-magnesium material, 7 parts of expansion source, 13 parts of polymer emulsion, 0.6 part of ultraviolet resistant agent, 7 parts of filling material, 3 parts of auxiliary agent and 16 parts of water.
3. The concrete durable coating applied to cold regions and high ultraviolet radiation regions as claimed in claim 1, wherein the phosphorus-magnesium material is a mixture of heavy magnesium oxide, a retarder, disodium hydrogen phosphate, potassium dihydrogen phosphate and ferric chloride.
4. The concrete durable coating applied to cold regions and high ultraviolet radiation regions as claimed in claim 3, wherein the retarder is borax.
5. The concrete durability coating applied to cold regions and high ultraviolet radiation regions according to claim 3, wherein the expansion source is one or a mixture of more than two of alum, aluminate cement, sulphoaluminate cement and gypsum.
6. The concrete durable coating applied to cold regions and high ultraviolet radiation regions according to claim 5, wherein the polymer emulsion is one or a mixture of more than two of acrylic, polyurethane and water-based epoxy emulsion.
7. The concrete durable coating applied to cold regions and high ultraviolet radiation regions as claimed in claim 6, wherein the anti-ultraviolet agent is one or a mixture of more than two of an anti-ultraviolet filler and an organic anti-ultraviolet agent, the anti-ultraviolet filler comprises mica titanium dioxide aqueous carbon black, and the organic anti-ultraviolet agent is a hindered amine anti-ultraviolet agent.
8. The concrete durable coating applied to cold regions and high ultraviolet radiation regions according to claim 7, wherein the filler is one or a mixture of more than two of acidic aggregate mineral powder and admixtures, the acidic aggregate mineral powder comprises quartz powder or quartz mineral powder, and the admixtures comprise fly ash, slag powder, volcanic ash and metakaolin.
9. The concrete durable coating applied to cold regions and high ultraviolet radiation regions according to claim 8, wherein the auxiliary agent comprises one or more of a water reducing agent, a leveling agent, a defoaming agent and cellulose ether.
10. The concrete durable coating applied to cold regions and high ultraviolet radiation regions according to claim 9, wherein the water reducing agent is a polycarboxylic acid water reducing agent; the leveling agent is polyether modified polydimethylsiloxane; the defoaming agent is one or more of an organic silicon defoaming agent, a polyether defoaming agent and polyether modified silicon.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115152580A (en) * | 2022-06-28 | 2022-10-11 | 重庆交通大学 | Waste engineering mud soft consolidation body planting matrix |
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| CN105294049A (en) * | 2015-10-12 | 2016-02-03 | 广西交通科学研究院 | Special cement-base patching material and cement concrete pavement quick repairing method |
| CN109574619A (en) * | 2018-11-29 | 2019-04-05 | 中建西部建设股份有限公司 | A kind of preparation method of magnesium phosphate foamed cement |
| CN110483000A (en) * | 2019-09-20 | 2019-11-22 | 济南大学 | A kind of interfacial agents and its preparation method and application for repairing masonry structure |
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2021
- 2021-11-03 CN CN202111295305.6A patent/CN113913036A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105294049A (en) * | 2015-10-12 | 2016-02-03 | 广西交通科学研究院 | Special cement-base patching material and cement concrete pavement quick repairing method |
| CN109574619A (en) * | 2018-11-29 | 2019-04-05 | 中建西部建设股份有限公司 | A kind of preparation method of magnesium phosphate foamed cement |
| CN110483000A (en) * | 2019-09-20 | 2019-11-22 | 济南大学 | A kind of interfacial agents and its preparation method and application for repairing masonry structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115152580A (en) * | 2022-06-28 | 2022-10-11 | 重庆交通大学 | Waste engineering mud soft consolidation body planting matrix |
| CN115152580B (en) * | 2022-06-28 | 2023-11-28 | 重庆交通大学 | Waste engineering slurry soft concretion planting matrix |
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