CN115232493A - Permeable protective coating for concrete - Google Patents
Permeable protective coating for concrete Download PDFInfo
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- CN115232493A CN115232493A CN202210991801.3A CN202210991801A CN115232493A CN 115232493 A CN115232493 A CN 115232493A CN 202210991801 A CN202210991801 A CN 202210991801A CN 115232493 A CN115232493 A CN 115232493A
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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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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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
- C09D7/60—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
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention relates to a penetration type protective coating for concrete, which is a mixture of a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight: 30-36% of acidic silica sol, 58-68% of tap water, 0.05-0.20% of wetting penetrating agent, 0.2-0.8% of dispersing agent, 0.2-0.8% of penetration enhancer, 1-4% of reinforcing agent and 0.2-0.8% of humectant; and B component: 23-29% of fluorocarbon emulsion, 12-15% of neutral silica sol, 14-27% of tap water, 17-20% of heavy calcium carbonate powder, 1-4% of titanium dioxide, 17-20% of mica powder, 0.3% of color paste, 0.1-0.4% of cellulose ether and 0.12-0.18% of film-forming additive. The penetration type protective coating has excellent penetration protection effect and excellent beautiful decoration effect due to the combined use of the component A and the component B.
Description
Technical Field
The invention relates to the technical field of protective coatings, in particular to an organic-inorganic composite permeable protective coating with a decoration function for double-component concrete.
Background
Concrete is an alkaline porous material and plays a role in protecting steel bars in a reinforced concrete structure. The reinforced concrete structure exposed for a long time is subject to corrosion of corrosive substances such as salt, multiple ions, penetrating water, flowing water, carbon dioxide and the like, so that concrete carbonization, calcium hydroxide loss, loosening and peeling, steel bar rusting and structural deterioration are caused. In municipal engineering, the reinforced concrete anti-collision wall is used as a facility for exposing a viaduct for a long time, concrete deterioration phenomena such as concrete carbonization, peeling and the like are very common, and a protective layer is required to cover the concrete. The existing organic or inorganic protective coating for concrete has no osmosis, only a shell is formed on the surface of the concrete, and the coating is bonded with the base layer concrete but has a two-layer structure, so that the coating is long day by day and can be finally separated under the action of an external environment; or transparent paint with penetration effect, but no covering decoration effect, and no aesthetic appearance. Municipal works are different from ordinary works in that not only is good durability required after maintenance, but also the appearance is good, which requires that the maintenance material has good durability and good decoration.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the permeable protective coating for the concrete is provided.
The technical scheme adopted by the invention is as follows: a penetration type protective coating for concrete is a mixture of two components A and B, wherein the two components consist of the following raw materials in percentage by weight,
the component A comprises:
30 to 36 percent of acidic silica sol
58 to 68 percent of tap water
0.05 to 0.20 percent of wetting penetrant
0.2 to 0.8 percent of dispersant
0.2 to 0.8 percent of penetration enhancer
1 to 4 percent of reinforcing agent
0.2 to 0.8 percent of humectant;
and B component:
23 to 29 percent of fluorocarbon emulsion
12 to 15 percent of neutral silica sol
14 to 27 percent of tap water
17 to 20 percent of coarse whiting powder
1 to 4 percent of titanium dioxide
17 to 20 percent of mica powder
0.3 percent of color paste
Cellulose ether 0.1-0.4%
0.12 to 0.18 percent of film-forming additive.
Further, in the component A, the acidic silica sol adopts an acidic silica sol solution with the pH value of 2-4, the particle size of the silica sol is 6-9nm, and the solid content is 21%. The particle size of the acidic silica sol is only 6-9nm so as to realize super-strong permeation to concrete, and the acidic silica sol, unhydrated cement, free calcium hydroxide and calcium oxide are used for producing hydrated calcium silicate in the concrete to block pores, increase the compactness and strength of the concrete, play a role in compacting and enhancing, prevent the erosion of harmful substances such as external carbon dioxide, water, acid, bicarbonate ions, sulfate ions, chloride ions and the like, and greatly increase the durability.
Furthermore, in the component A, the wetting penetrant adopts a fluorocarbon surfactant, has the characteristics of high surface activity, high thermal stability, high chemical stability and the like, can greatly improve and improve the wettability, permeability and diffusivity of the component A to concrete and the fluidity of the component A, effectively reduces the surface tension, can reduce the surface tension of water to be less than 17 dynes, and is superior to the common wetting penetrant. The smaller the surface tension is, the deeper the penetration depth is, and the deeper the penetration is, the thicker the component A can form a concrete protective layer, and the fluorocarbon surfactant has stable performance in high-temperature, acidic and alkaline environments. Long-term studies of chloride-entering low permeability high performance (50 MPa) bridge construction concrete were conducted according to british Traffic Research Laboratory (TRL) and observed: the rate of capillary "absorbency" is millions of times faster than the rate of "permeability", about 10 -6 M/s. The reduction in surface tension greatly increases the "absorption" of the capillaries, i.e., the capillary effect is increased, allowing the A component to penetrate deeper into the concrete.
Furthermore, in the component A, the dispersant adopts dispersant NNO with a chemical formula of C 11 H 9 NaO 4 S is easy to dissolve in water and aqueous solution with any hardness, has excellent diffusivity and protective colloid performance, and can prevent the agglomeration of the silica sol solution. After the silica sol is agglomerated, the particle size is enlarged and is not easy to permeate, and after the dispersant NNO is added, the silica sol in the component A can be kept stable, the particle size is stable at 6-9nm and is not agglomerated, so that the silica sol is easy to penetrate into concrete to react.
Further, in the component A, concentrated sulfuric acid with the purity of 98% is adopted as the penetration enhancer. The concentrated sulfuric acid can corrode some carbonates on the surface, open concrete pores, especially capillary pores and capillaries, so that the component A permeates into the deeper part of the concrete to react, and the thickness of the concrete protective layer is increased.
Further, in the component A, the enhancer adopts urea. The urea can excite the activity of active substances in the concrete, promote hydration reaction and enable the concrete to be more compact; meanwhile, the urea has a good water retention effect, after the urea permeates into concrete, the component A can be stored in the concrete for a long time, the evaporation and escape speed of water contained in the component A is greatly delayed, so that active substances in the component A can participate in reaction for a long time more fully, more calcium silicate hydrate is generated, pores are blocked, the concrete is compacted, the concrete is better protected, and in addition, the urea is different from cellulose ether water retention humectant, the viscosity of the component A is not influenced, the viscosity of an aqueous solution can be obviously increased by the cellulose ether water retention humectant, and the permeation is not facilitated.
Furthermore, in the component A, the humectant adopts nano zinc oxide, is spherical particles, has the particle size of less than 100nm, and has the average particle size of 50nm. The nano zinc oxide has a good moisturizing effect, so that the retention time of the component A in the concrete is greatly prolonged, the component A can fully participate in the reaction to generate more calcium silicate hydrate, and meanwhile, the component A can permeate deeper layers of the concrete to better protect the concrete.
Urea and nano zinc oxide are used as a reinforcing agent and a humectant, so that the water retention and moisture retention capability of the component A is obviously superior to that of a common concrete penetration type protective agent, the water retention and moisture retention capability is extremely strong, the component A is different from cellulose ether water retention and humectant, the viscosity of the component A is not influenced, the component A has ultralow viscosity which is only 8 Pa.S and is lower than that of water, the permeability is extremely strong, and the cellulose ether water retention and humectant can obviously increase the viscosity of an aqueous solution and is not easy to permeate; meanwhile, strong acid (98% concentrated sulfuric acid) is added to promote infiltration and mutually promote the infiltration with a humectant, so that the water can be conveniently infiltrated into a deeper position. Generally, the concrete penetration type protective agent does not consider water retention and moisture retention at all, although the concrete penetration type protective agent has permeability, if volatilization is too fast, moisture can be discharged from concrete rapidly, a large amount of moisture is needed for reaction for generating hydrated calcium silicate, and the reaction stops without moisture.
Further, in the component B, the fluorocarbon emulsion is anionic water-based fluorocarbon emulsion, the pH value is 7.5-9, and the solid content is 47%. The fluorocarbon emulsion is a main film forming substance, is an anionic water-based fluorocarbon emulsion, has excellent durability, weather resistance and good dirt resistance, has outstanding adhesive force and chalking resistance, has good adaptability, and has the best durability compared with styrene-acrylic emulsion, pure acrylic emulsion and silicone acrylic emulsion.
In the component B, the particle diameter of the neutral silica sol is 10-15nm, the PH value is 7, and the solid content is 30%. The neutral silica sol is an inorganic film forming substance, has strong infiltration, can infiltrate into a concrete surface layer, and can be crosslinked with the fluorocarbon emulsion to form a tough film to protect concrete.
Further, in the component B, the titanium dioxide adopts rutile titanium dioxide; the mica powder adopts 800 meshes of sericite. The coarse whiting powder, the titanium pigment and the mica powder are used as fillers, so that the film is firmer, and the covering power is increased.
Further, in the component B, the color paste is one or more of black, beige and yellow color pastes, is mainly used as a color mixing component, and the color is adjusted according to the requirement;
in the component B, hydroxyethyl cellulose ether with the viscosity of 10 is adopted as the cellulose ether 4 Pa.S; the film-forming assistant adopts propylene glycol methyl ether acetate. The cellulose ether and the film-forming assistant have the functions of increasing viscosity, preventing the coating from demixing and settling and promoting the film formation of the coating.
The component A is colorless transparent aqueous liquid, and after the component A is coated on the surface of concrete, active chemical substances contained in the material permeate into the concrete through carrier water to form water-insoluble crystals in the concrete to block capillary channels, so that the concrete is compact, waterproof and carbonization-resistant; the component B is a color-adjustable film-forming coating, has strong covering power and alkali resistance, good decoration and good compatibility with the component A and concrete. The cement-based permeable crystallization waterproof coating is different from other organic or inorganic coatings in that the A component and the B component are used in a composite manner, and have the functions of permeation, crystallization, film formation and decoration, so that a coating and base concrete are integrated to form integral protection and permanent protection, and meanwhile, the surface decoration is attractive and is rigid and flexible.
Compared with the prior art, the invention has the following advantages:
1. the ultra-low surface tension makes the permeability of the concrete extremely strong, the capillary effect of the concrete can be greatly improved, the deepest penetration depth can reach 50mm, and the promotion is extremely large compared with the penetration depth of 15mm of a common penetration type protective agent;
2. the water retention and moisture retention capability is extremely strong, the viscosity is ultralow, the new water retention and moisture retention agent is introduced, the evaporation speed of the water contained in the component A is greatly delayed, the component A can stay in the concrete for a long time to fully react, the permeability and the reaction completeness are greatly enhanced, the water can continuously permeate, the water can permeate into deeper layers of the concrete, the durability is improved, and compared with water retention agents such as cellulose ether, the water retention and moisture retention agent has extremely low viscosity and is beneficial to permeation;
3. the material has the characteristics of rigidity and flexibility, the substance after the component A is reacted is rigid, and the toughness interweaving layer with an intricate network structure formed on the substrate after the component B is reacted is flexible, so that the dynamic crack resistance of the material can be greatly improved, and the defects of the rigid material in the mechanical property are overcome;
4. the component A is acidic and can neutralize the alkalinity of the surface of concrete, so that the component A and the component B are more tightly combined with the concrete;
5. the component A and the component B are used in a composite manner, and have ultralow surface tension, excellent water retention and moisture retention capacity and ultralow viscosity, and the functions are mutually promoted and mutually superposed, so that the composite material can play a role of 1+1 > 3, has an excellent penetration protection effect and also has an excellent aesthetic decoration effect.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the embodiments of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
The following components A and B are adopted by weight percentage:
the component A comprises: 36.00 percent of acid silica sol, 0.05 percent of fluorocarbon surfactant, 0.80 percent of dispersant NNO, 0.20 percent of concentrated sulfuric acid, 1.00 percent of urea, 0.20 percent of nano zinc oxide and 61.75 percent of tap water to prepare the penetrating protective coating A liquid for concrete;
and the component B comprises: 23.00 percent of water-based fluorocarbon emulsion, 12.00 percent of neutral silica sol, 20.00 percent of heavy calcium carbonate powder, 1.00 percent of titanium dioxide, 17.00 percent of mica powder, 0.30 percent of color paste, 0.10 percent of hydroxyethyl cellulose ether, 0.12 percent of propylene glycol methyl ether acetate and 26.48 percent of tap water to prepare a concrete permeable protective coating B liquid;
the mass ratio of the component A to the component B is 1.
When the mixed protective layer is used, the liquid A is coated on the surface of concrete, and the liquid B is coated on the surface of the concrete after the surface of the liquid A is dried, so that the mixed protective layer with the functions of penetration protection and decoration and beauty is formed.
Example 2
The components A and B are adopted according to the following weight percentage:
and (2) component A: 34.00 percent of acid silica sol, 0.10 percent of fluorocarbon surfactant, 0.60 percent of dispersant NNO, 0.40 percent of concentrated sulfuric acid, 2.00 percent of urea, 0.40 percent of nano zinc oxide and 62.50 percent of tap water, thus preparing the penetrating protective coating A liquid for concrete;
and the component B comprises: 25.00 percent of water-based fluorocarbon emulsion, 13.00 percent of neutral silica sol, 19.00 percent of heavy calcium carbonate powder, 2.00 percent of titanium dioxide, 18.00 percent of mica powder, 0.30 percent of color paste, 0.20 percent of hydroxyethyl cellulose ether, 0.14 percent of propylene glycol methyl ether acetate and 22.36 percent of tap water to prepare a concrete permeable protective coating B liquid;
the mass ratio of the component A to the component B is 1.
When the mixed protective layer is used, the liquid A is coated on the surface of concrete, and the liquid B is coated on the surface of the concrete after the surface of the liquid A is dried, so that the mixed protective layer with the functions of permeation protection and decoration and beauty is formed.
Example 3
The following components A and B are adopted by weight percentage:
the component A comprises: 32.00 percent of acid silica sol, 0.15 percent of fluorocarbon surfactant, 0.40 percent of dispersant NNO, 0.60 percent of concentrated sulfuric acid, 3.00 percent of urea, 0.60 percent of nano zinc oxide and 63.25 percent of tap water to prepare the penetrating protective coating A liquid for concrete of the invention;
and B component: 27.00 percent of water-based fluorocarbon emulsion, 14.00 percent of neutral silica sol, 18.00 percent of heavy calcium carbonate powder, 3.00 percent of titanium dioxide, 19.00 percent of mica powder, 0.30 percent of color paste, 0.30 percent of hydroxyethyl cellulose ether, 0.16 percent of propylene glycol methyl ether acetate and 18.24 percent of tap water to prepare a concrete permeable protective coating B liquid;
the mass ratio of the component A to the component B is 1.
When the mixed protective layer is used, the liquid A is coated on the surface of concrete, and the liquid B is coated on the surface of the concrete after the surface of the liquid A is dried, so that the mixed protective layer with the functions of penetration protection and decoration and beauty is formed.
Example 4
The following components A and B are adopted by weight percentage:
and (2) component A: 30.00 percent of acidic silica sol, 0.20 percent of fluorocarbon surfactant, 0.20 percent of dispersant NNO, 0.80 percent of concentrated sulfuric acid, 4.00 percent of urea, 0.80 percent of nano zinc oxide and 64.00 percent of tap water, thus preparing the penetrating protective coating A liquid for concrete;
and B component: 29.00 percent of water-based fluorocarbon emulsion, 15.00 percent of neutral silica sol, 17.00 percent of heavy calcium carbonate powder, 4.00 percent of titanium dioxide, 20.00 percent of mica powder, 0.30 percent of color paste, 0.40 percent of hydroxyethyl cellulose ether, 0.18 percent of propylene glycol methyl ether acetate and 14.12 percent of tap water to prepare the concrete permeable protective coating B liquid;
the mass ratio of the component A to the component B is 1.
When the mixed protective layer is used, the liquid A is coated on the surface of concrete, and the liquid B is coated on the surface of the concrete after the surface of the liquid A is dried, so that the mixed protective layer with the functions of penetration protection and decoration and beauty is formed.
Comparative example 1
The difference from example 4 is that: 0.50% of fluorocarbon surfactant and 63.70% of tap water.
Comparative example 2
The difference from example 4 is that: 0.02 percent of fluorocarbon surfactant and 64.18 percent of tap water.
Comparative example 3
The difference from example 4 is that: concentrated sulfuric acid 0.10%, and tap water 64.70%.
Comparative example 4
The difference from example 4 is that: concentrated sulfuric acid 2.00% and tap water 62.80%.
Comparative example 5
The difference from example 4 is that: 10.00 percent of urea and 58.00 percent of tap water.
Comparative example 6
The difference from example 4 is that: 0.50% of urea and 67.50% of tap water.
Comparative example 7
The differences from example 4 are: 2.00 percent of nano zinc oxide and 62.80 percent of tap water.
Comparative example 8
The difference from example 4 is that: 0.10 percent of nano zinc oxide and 64.70 percent of tap water.
Comparative example 9
The permeation type protective agent and the film-forming type decorative layer are prepared according to the proportion 9 by firstly coating the permeation type protective agent on the surface of concrete and then coating the film-forming type decorative layer after surface drying, wherein the mass ratio of the permeation type protective agent to the film-forming type decorative layer is 1.
TABLE 1 penetration type protective coating for concrete prepared in examples 1 to 4 and the performance parameters of comparative examples 1 to 9
Test references for penetration depth during testing: the penetration depth research of the Perili, liu Yongsheng, wangyoujiang and cement-based infiltration crystallization material, namely, the novel building material, is carried out by a method in the 05 year 2019; the ultraviolet aging resistance time test is carried out according to the specification of 'artificial weathering aging and artificial radiation exposure filtered xenon arc radiation of colored paint and varnish' GB/T1865-2009/ISO 11341; the accelerated carbonization depth test is carried out according to the regulation of the standard GB/T50082-2009 test method for the long-term performance and the durability of common concrete.
From the above table, it can be seen that when the amounts of the fluorocarbon surfactant, the concentrated sulfuric acid, the urea and the nano-zinc oxide are insufficient or excessive (comparative example 1-comparative example 8), the parameters of the coating will decrease, and therefore, the amounts of the fluorocarbon surfactant, the concentrated sulfuric acid, the urea and the nano-zinc oxide need to be controlled within a reasonable range; the penetration depth and the moisture retention time in concrete of examples 1-4 are far higher than those of comparative example 9, the depth after accelerated carbonization is 0 and far lower than that of comparative example 9, and the ultraviolet aging resistance time is also much higher than that of comparative example 9, so that the comprehensive performance of the concrete is far better than that of comparative example 9.
Claims (8)
1. The permeable protective coating for concrete is characterized in that: is a mixture of two components A and B, the two components consist of the following raw materials in percentage by weight,
the component A comprises:
30 to 36 percent of acidic silica sol
58 to 68 percent of tap water
Wetting penetrating agent 0.05-0.20%
0.2 to 0.8 percent of dispersant
0.2 to 0.8 percent of penetration enhancer
1 to 4 percent of reinforcing agent
0.2 to 0.8 percent of humectant;
and B component:
23 to 29 percent of fluorocarbon emulsion
12 to 15 percent of neutral silica sol
14 to 27 percent of tap water
17 to 20 percent of coarse whiting powder
1 to 4 percent of titanium dioxide
17 to 20 percent of mica powder
0.3 percent of color paste
Cellulose ether 0.1-0.4%
0.12 to 0.18 percent of film-forming additive.
2. The permeable protective coating for concrete according to claim 1, wherein: in the component A, the acidic silica sol adopts an acidic silica sol solution with the pH value of 2-4, the particle size of the silica sol is 6-9nm, and the solid content is 21%; the wetting penetrant adopts a fluorocarbon surfactant.
3. The permeable protective coating for concrete according to claim 1, wherein: in the component A, the dispersant adopts dispersant NNO with a chemical formula of C 11 H 9 NaO 4 S。
4. The permeable protective coating for concrete according to claim 1, wherein: in the component A, concentrated sulfuric acid with the purity of 98% is adopted as the penetration enhancer.
5. The permeable protective coating for concrete according to claim 1, wherein: in the component A, the reinforcing agent adopts urea.
6. The permeable protective coating for concrete according to claim 1, wherein: in the component A, the humectant adopts nano zinc oxide, the grain diameter is less than 100nm, and the average grain diameter is 50nm.
7. The permeable protective coating for concrete according to claim 1, wherein: in the component B, the fluorocarbon emulsion is anionic water-based fluorocarbon emulsion, the pH value is 7.5-9, and the solid content is 47%; the particle diameter of the neutral silica sol is 10-15nm, the PH value is 7, and the solid content is 30%.
8. The permeable protective coating for concrete according to claim 1, wherein: in the component B, the titanium dioxide adopts rutile titanium dioxide; the mica powder adopts 800 meshes of sericite; the color paste is one or more of black, beige and yellow color pastes; the cellulose ether is hydroxyethyl cellulose ether with the viscosity of 10 4 Pa.S; the film-forming assistant adopts propylene glycol methyl ether acetate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115558360A (en) * | 2022-10-27 | 2023-01-03 | 中德新亚建筑材料有限公司 | Color-adjustable waterproof and carbonization-resistant concrete coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115558360A (en) * | 2022-10-27 | 2023-01-03 | 中德新亚建筑材料有限公司 | Color-adjustable waterproof and carbonization-resistant concrete coating and preparation method thereof |
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| CN115232493B (en) | 2023-03-31 |
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