CN115043605A - Anti-corrosion coating steel fiber for concrete and preparation process thereof - Google Patents
Anti-corrosion coating steel fiber for concrete and preparation process thereof Download PDFInfo
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- CN115043605A CN115043605A CN202210879465.3A CN202210879465A CN115043605A CN 115043605 A CN115043605 A CN 115043605A CN 202210879465 A CN202210879465 A CN 202210879465A CN 115043605 A CN115043605 A CN 115043605A
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- 239000000835 fiber Substances 0.000 title claims abstract description 105
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 104
- 239000010959 steel Substances 0.000 title claims abstract description 104
- 238000005260 corrosion Methods 0.000 title claims abstract description 57
- 239000004567 concrete Substances 0.000 title claims abstract description 44
- 239000011248 coating agent Substances 0.000 title claims abstract description 37
- 238000000576 coating method Methods 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 65
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 37
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 36
- 239000000839 emulsion Substances 0.000 claims abstract description 31
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims abstract description 30
- 229910000165 zinc phosphate Inorganic materials 0.000 claims abstract description 30
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 28
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 23
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 22
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims description 25
- 238000005470 impregnation Methods 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 12
- 238000007605 air drying Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
- 239000004568 cement Substances 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 239000000654 additive Substances 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000005028 tinplate Substances 0.000 description 2
- 241000272186 Falco columbarius Species 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011374 ultra-high-performance concrete Substances 0.000 description 1
Classifications
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/48—Metal
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/107—Acids or salts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of building materials, and particularly relates to an anti-corrosion coating steel fiber for concrete and a preparation process thereof. The technical points are as follows: the composition comprises the following components in parts by weight: 5000-20000 parts of steel fiber, 2000-10000 parts of modified silicone emulsion, 25-100 parts of zinc phosphate powder and 25-60 parts of magnesium oxide powder; 5-30 parts of nano titanium dioxide, 10-30 parts of nano silicon carbide and 20-200 parts of modified nano silicon oxide. According to the anti-corrosion coating steel fiber for concrete and the preparation process thereof, the steel fiber is modified by the modified silicone emulsion, the zinc phosphate powder and other additives, so that the steel fiber for concrete, which has strong corrosion resistance and good adhesion with a cement-based material and can be uniformly dispersed in the cement-based material, is obtained.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to an anti-corrosion coating steel fiber for concrete and a preparation process thereof.
Background
The steel fiber for the common concrete or the ultra-high performance concrete has excellent tensile, bending and fatigue resistance, and has good bonding performance with a cement base material, so that the steel fiber has obvious improvement effect on the toughness, bending resistance and fatigue resistance of the concrete when being doped into the concrete.
However, for coastal regions, inland saline soil and service environments with corrosive ions, the corrosion of the steel fibers seriously affects the durability and appearance quality of the fiber concrete, and also limits the application of the steel fiber concrete under the corrosive environment conditions.
In view of the above-mentioned disadvantages of the conventional steel fiber for concrete, the present inventors have made extensive research and innovation based on practical experience and professional knowledge of designing and manufacturing such materials for many years, and by using the theory, in order to create an anti-corrosion coating steel fiber for concrete and a preparation process thereof. After continuous research and design and repeated trial production and improvement, the invention with practical value is finally created.
Disclosure of Invention
The invention aims to provide an anti-corrosion coating steel fiber for concrete, which is modified by modified silicone emulsion, zinc phosphate powder and other additives to obtain the steel fiber for concrete, which has strong corrosion resistance, good adhesion with cement-based materials and can be uniformly dispersed in the cement-based materials.
The technical purpose of the invention is realized by the following technical scheme:
the invention provides an anti-corrosion coating steel fiber for concrete, which comprises the following components in parts by weight:
5000-20000 parts of steel fiber, 2000-10000 parts of modified silicone emulsion, 25-100 parts of zinc phosphate powder and 25-60 parts of magnesium oxide powder; 5-30 parts of nano titanium dioxide, 10-30 parts of nano silicon carbide and 20-200 parts of modified nano silicon oxide.
Furthermore, the steel fiber is straight steel fiber or special-shaped steel fiber, the length is 6 mm-40 mm, and the diameter is more than or equal to 0.2 mm.
Further, the viscosity of the modified silicone emulsion at 25 ℃ is less than or equal to 5000mm 2 /s。
Further, the content of the organic silicon in the modified silicone emulsion is determined by the length of the steel fiber and the fineness of the zinc phosphate powder and the magnesium oxide powder.
Further, the calculation model of the silicone content is as follows:
Furthermore, the zinc content in the zinc phosphate powder is more than or equal to 45 percent, and the fineness is more than or equal to 500 meshes.
If the aspect ratio of the steel fiber is too large, the dispersibility of the steel fiber in the silicone emulsion is poor, if the content of the silicone is too high, the steel fiber is agglomerated, and if the aspect ratio of the steel fiber is small, the content of the silicone needs to be increased to ensure the uniformity of the deposition of the silicone on the surface of the steel fiber. The zinc phosphate powder and the magnesium oxide powder are used as inorganic materials, the dispersibility of the zinc phosphate powder and the magnesium oxide powder in the organic silicone emulsion is poor, in the invention, the particle size distribution of two inorganic powders can be judged according to the ratio of D50 to D90 in the particle size distribution, if the ratio is larger, the particle size of the powder is larger, if the ratio is smaller, the particle size of the powder is smaller, and when the particle size of the powder is larger, the content of organic silicon is increased, so that the powder can be wrapped more uniformly by the organic silicon, and the inorganic powder can be conveniently dispersed in a cement-based material; when the particle size of the powder is small, the content of the organic silicon is reduced, so that the viscosity of the system is reduced, and the agglomeration of inorganic powder is avoided.
Furthermore, the purity of the magnesium oxide powder is more than or equal to 99 percent, the content of chloride ions is less than or equal to 0.05 percent, and the fineness is more than or equal to 200 meshes.
Furthermore, the purity of the nano titanium dioxide is more than or equal to 99.9 percent, the average particle size is less than or equal to 5nm, and the surface area is more than or equal to 150000m 2 /kg。
Furthermore, the purity of the nano silicon carbide is more than or equal to 99.9 percent, the average grain diameter is less than or equal to 10nm, and the surface area is more than or equal to 100000m 2 /kg。
Further, the average particle diameter of the modified nano-silica is 2-5 nm, and the specific surface area is 800-1200 m 2 /g。
The second purpose of the invention is to provide a preparation process of the steel fiber of the anti-corrosion coating for the concrete, which has the same technical effect.
The preparation process of the anti-corrosion coating steel fiber for concrete provided by the invention specifically comprises the following operation steps:
s1, weighing the components according to the raw material ratio, preparing an anti-corrosion impregnation liquid, adding the modified silicone emulsion, the zinc phosphate powder, the magnesium oxide powder, the nano titanium dioxide, the nano silicon carbide and the modified nano silicon oxide, and uniformly stirring;
s2, adding steel fibers into the anti-corrosion impregnation liquid obtained in the step S1, and stirring to fully contact and mix the steel fibers and the anti-corrosion impregnation liquid;
and S3, air-drying the steel fiber obtained in the step S2 at normal temperature in an environment with the relative humidity not higher than 50% and the temperature of 10-40 ℃, and forming the anti-corrosion coating steel fiber for concrete after the air-drying is finished.
Further, the preparation process of the anti-corrosion coating steel fiber for concrete provided by the invention specifically comprises the following operation steps:
s1, weighing the components according to the raw material ratio, preparing an anti-corrosion impregnation liquid, adding the weighed modified silicone emulsion, zinc phosphate powder, magnesium oxide powder, nano titanium dioxide, nano silicon carbide and modified nano silicon oxide, and stirring for 3-5 min;
s2, weighing steel fibers in a corresponding proportion, adding the corresponding steel fibers into the impregnation liquid obtained in the step S1, and stirring for 3-5 min to fully contact and mix the steel fibers with the anticorrosion impregnation liquid;
s3, air-drying the steel fiber obtained in the step S2 at normal temperature for not less than 6 hours in an environment with the relative humidity not higher than 50% and the temperature of 10-40 ℃, and forming the anti-corrosion coating steel fiber for the concrete after drying.
In conclusion, the invention has the following beneficial effects:
according to the anti-corrosion coating steel fiber for concrete and the preparation process thereof, the steel fiber is modified by the modified silicone emulsion, the zinc phosphate powder and other additives, so that the steel fiber for concrete, which has strong corrosion resistance and good adhesion with a cement-based material and can be uniformly dispersed in the cement-based material, is obtained.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the embodiments, features and effects of the steel fiber for an anti-corrosion coating for concrete and the preparation process thereof according to the present invention will be described in detail below.
The raw material sources used in this embodiment are as follows:
steel fiber: zhejiang Changxing Yufeng new material science and technology limited
Modified silicone emulsion: ausbang EP2115 of Shenzhen Ausbang GmbH
Zinc phosphate powder: lanzhou yellow river zinc-magnesium nano material research institute
Magnesium oxide powder: MAGNESIUM OXIDE OF HEBEI MAGNESIUM-SALTS TECHNOLOGY CO
Nano titanium dioxide: merlin 13463-67-7, Shanghai Merlin Biotechnology Ltd
Nano silicon carbide: new material of Bysli (Suzhou) Co., Ltd. silicon carbide
Modified nano silicon oxide: new materials of Bysli (Suzhou) Ltd. silica
Example 1
The anti-corrosion coating steel fiber for concrete provided by the embodiment comprises the following components in parts by weight: 10000 parts of steel fiber, 5000 parts of modified silicone emulsion, 50 parts of zinc phosphate powder and 40 parts of magnesium oxide powder; 20 parts of nano titanium dioxide, 15 parts of nano silicon carbide and 50 parts of modified nano silicon oxide.
Wherein the steel fiber is straight steel fiber with the length of 20mm and the diameter of 0.5 mm; the viscosity of the modified silicone emulsion at 25 ℃ is less than or equal to 5000mm 2 (s), organosilicon content 4%; the zinc content in the zinc phosphate powder is more than or equal to 45 percent, and the fineness is more than or equal to 500 meshes; the purity of the magnesium oxide powder is more than or equal to 99 percent, the content of chloride ions is less than or equal to 0.05 percent, and the fineness is more than or equal to 200 meshes; the purity of the nano titanium dioxide is more than or equal to 99.9 percent, the average particle size is less than or equal to 5nm, and the surface area is more than or equal to 150000m 2 Per kg; the purity of the nano silicon carbide is more than or equal to 99.9 percent, the average particle size is less than or equal to 10nm, and the surface area is more than or equal to 100000m 2 Per kg; the average particle diameter of the modified nano-silica is 3.5nm, and the specific surface area is 1050m 2 /g。
The preparation method comprises the following steps:
s1, weighing the components according to the raw material ratio, preparing an anti-corrosion impregnation liquid, adding the weighed modified silicone emulsion, zinc phosphate powder, magnesium oxide powder, nano titanium dioxide, nano silicon carbide and modified nano silicon oxide, and stirring for 5 min;
s2, weighing steel fibers in a corresponding proportion, adding corresponding steel fibers into the impregnation liquid obtained in the step S1, and stirring for 5min to fully contact and mix the steel fibers with the anti-corrosion impregnation liquid;
s3, air-drying the steel fiber obtained in the step S2 at normal temperature for not less than 6 hours in an environment with the relative humidity not higher than 50% and the temperature of 20 ℃, and forming the anti-corrosion coating steel fiber for the concrete after drying.
Example 2
The anti-corrosion coating steel fiber for concrete provided by the embodiment comprises the following components in parts by weight: 15000 parts of steel fiber, 10000 parts of modified silicone emulsion, 45 parts of zinc phosphate powder and 50 parts of magnesium oxide powder; 25 parts of nano titanium dioxide, 25 parts of nano silicon carbide and 65 parts of modified nano silicon oxide.
Wherein the steel fiber is straight steel fiber with the length of 20mm and the diameter of 0.5 mm; the viscosity of the modified silicone emulsion at 25 ℃ is less than or equal to 5000mm 2 (s), organosilicon content 4%; the zinc content in the zinc phosphate powder is more than or equal to 45 percent, and the fineness is more than or equal to 500 meshes; the purity of the magnesium oxide powder is more than or equal to 99 percent, the content of chloride ions is less than or equal to 0.05 percent, and the fineness is more than or equal to 200 meshes; the purity of the nano titanium dioxide is more than or equal to 99.9 percent, the average particle size is less than or equal to 5nm, and the surface area is more than or equal to 150000m 2 Per kg; the purity of the nano silicon carbide is more than or equal to 99.9 percent, the average particle size is less than or equal to 10nm, and the surface area is more than or equal to 100000m 2 Per kg; the average particle diameter of the modified nano-silica is 3.5nm, and the specific surface area is 1050m 2 /g。
The preparation method comprises the following steps:
s1, weighing the components according to the raw material ratio, preparing an anti-corrosion impregnation liquid, adding the weighed modified silicone emulsion, zinc phosphate powder, magnesium oxide powder, nano titanium dioxide, nano silicon carbide and modified nano silicon oxide, and stirring for 5 min;
s2, weighing steel fibers in a corresponding proportion, adding corresponding steel fibers into the impregnation liquid obtained in the step S1, and stirring for 5min to fully contact and mix the steel fibers with the anti-corrosion impregnation liquid;
s3, air-drying the steel fiber obtained in the step S2 at normal temperature for not less than 6 hours in an environment with the relative humidity not higher than 50% and the temperature of 20 ℃, and forming the anti-corrosion coating steel fiber for the concrete after drying.
Example 3
The anti-corrosion coating steel fiber for concrete provided by the embodiment comprises the following components in parts by weight: 10000 parts of steel fiber, 4500 parts of modified silicone emulsion, 53 parts of zinc phosphate powder and 42 parts of magnesium oxide powder; 18 parts of nano titanium dioxide, 20 parts of nano silicon carbide and 55 parts of modified nano silicon oxide.
Wherein the steel fiber is straight steel fiber with the length of 20mm and the diameter of 0.5 mm; the viscosity of the modified silicone emulsion at 25 ℃ is less than or equal to 5000mm 2 S, organosilicon content 4%; the zinc content in the zinc phosphate powder is more than or equal to 45 percent, and the fineness is more than or equal to 500 meshes; the purity of the magnesium oxide powder is more than or equal to 99 percent, the content of chloride ions is less than or equal to 0.05 percent, and the fineness is more than or equal to 200 meshes; the purity of the nano titanium dioxide is more than or equal to 99.9 percent, the average particle size is less than or equal to 5nm, and the surface area is more than or equal to 150000m 2 (iv) kg; the purity of the nano silicon carbide is more than or equal to 99.9 percent, the average particle size is less than or equal to 10nm, and the surface area is more than or equal to 100000m 2 Per kg; the average particle diameter of the modified nano-silica is 3.5nm, and the specific surface area is 1050m 2 /g。
The preparation method comprises the following steps:
s1, weighing the components according to the raw material ratio, preparing an anti-corrosion impregnation liquid, adding the weighed modified silicone emulsion, zinc phosphate powder, magnesium oxide powder, nano titanium dioxide, nano silicon carbide and modified nano silicon oxide, and stirring for 5 min;
s2, weighing steel fibers in a corresponding proportion, adding corresponding steel fibers into the impregnation liquid obtained in the step S1, and stirring for 5min to fully contact and mix the steel fibers with the anti-corrosion impregnation liquid;
s3, air-drying the steel fiber obtained in the step S2 at normal temperature for not less than 6 hours in an environment with the relative humidity not higher than 50% and the temperature of 20 ℃, and forming the anti-corrosion coating steel fiber for the concrete after drying.
Example 4
The anti-corrosion coating steel fiber for concrete provided by the embodiment comprises the following components in parts by weight: 10000 parts of steel fiber, 4500 parts of modified silicone emulsion, 53 parts of zinc phosphate powder and 42 parts of magnesium oxide powder; 18 parts of nano titanium dioxide, 20 parts of nano silicon carbide and 55 parts of modified nano silicon oxide.
Wherein the steel fiber is straight steel fiber with the length of 20mm and the diameter of 0.5 mm; the viscosity of the modified silicone emulsion at 25 ℃ is less than or equal to 5000mm 2 (s), organosilicon content 4%; the zinc content in the zinc phosphate powder is more than or equal to 45 percent, and the fineness is more than or equal to 500 meshes; the purity of the magnesium oxide powder is more than or equal to 99 percent, the content of chloride ions is less than or equal to 0.05 percent, and the fineness is more than or equal to 200 meshes; the purity of the nano titanium dioxide is more than or equal to 99.9 percent, the average particle size is less than or equal to 5nm, and the surface area is more than or equal to 150000m 2 Per kg; the purity of the nano silicon carbide is more than or equal to 99.9 percent, the average particle size is less than or equal to 10nm, and the surface area is more than or equal to 100000m 2 Per kg; the average diameter of the modified nano-silica particles is 3.5nm, and the specific surface area is 1050m 2 /g。
The silicone content in the modified silicone emulsion was calculated by the following formula:
The preparation method comprises the following steps:
s1, weighing the components according to the raw material ratio, preparing an anti-corrosion impregnation liquid, adding the weighed modified silicone emulsion, zinc phosphate powder, magnesium oxide powder, nano titanium dioxide, nano silicon carbide and modified nano silicon oxide, and stirring for 5 min;
s2, weighing steel fibers in a corresponding proportion, adding corresponding steel fibers into the impregnation liquid obtained in the step S1, and stirring for 5min to fully contact and mix the steel fibers with the anti-corrosion impregnation liquid;
s3, air-drying the steel fiber obtained in the step S2 at normal temperature for not less than 6 hours in an environment with the relative humidity not higher than 50% and the temperature of 20 ℃, and forming the anti-corrosion coating steel fiber for the concrete after drying.
And (3) performance testing:
the performance test of the steel fibers for the anti-corrosion coating for concrete obtained in examples 1 to 4 was carried out, and the results are shown in table 1.
The test method is as follows:
the corrosion resistance test method comprises the following steps: the salt spray test method (GB/T1771) comprises scratching the coated sample plate in a standard manner, placing the sample plate in a smoke box, exposing the sample plate in 5% salt solution mist with the relative humidity of 100% at 35 ℃, and observing the corrosion, spreading and foaming degree of the sample plate after a certain time; the method for calculating the area of the metal corrosion area under the coating utilizes a digital camera to observe the corrosion morphology of the coating sample under different soaking times, and processes and analyzes the influence on the corrosion morphology of the coating sample through image processing software.
A method for testing the dispersion performance in the cement-based material comprises the following steps: the Positest adhesion detector is used for measuring the adhesion of the coating on the tinplate test piece in different cycle periods, the influence of the molecular structure of the coating on the mechanical property of the tinplate test piece is contrastively analyzed, in order to improve the reliability of data, 3 times of tests are carried out on each parallel test piece, and the results are averaged.
TABLE 1 Performance test data for examples 1-4
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The anti-corrosion coating steel fiber for concrete is characterized by comprising the following components in parts by weight:
5000-20000 parts of steel fiber, 2000-10000 parts of modified silicone emulsion, 25-100 parts of zinc phosphate powder and 25-60 parts of magnesium oxide powder; 5-30 parts of nano titanium dioxide, 10-30 parts of nano silicon carbide and 20-200 parts of modified nano silicon oxide.
2. The steel fiber with the anticorrosive coating for concrete according to claim 1, wherein the steel fiber is a straight steel fiber or a deformed steel fiber, the length of the steel fiber is 6mm to 40mm, and the diameter of the steel fiber is not less than 0.2 mm.
3. The anti-corrosion coated steel fiber for concrete according to claim 1, wherein the viscosity of the modified silicone emulsion is 5000mm or less at 25 ℃ 2 /s。
4. The anti-corrosion coated steel fiber for concrete according to claim 1, wherein the content of the silicone in the modified silicone emulsion is determined by the length of the steel fiber and the fineness of the zinc phosphate powder and the magnesium oxide powder.
5. The steel fiber with an anti-corrosion coating for concrete according to claim 1, wherein the zinc content in the zinc phosphate powder is not less than 45%, and the fineness is not less than 500 meshes.
6. The anti-corrosion coating steel fiber for concrete according to claim 1, wherein the purity of the magnesium oxide powder is not less than 99%, the chloride ion content is not more than 0.05%, and the fineness is not less than 200 meshes.
7. The steel fiber with an anticorrosive coating for concrete according to claim 1, wherein the purity of the nano titanium dioxide is not less than 99.9%, the average particle size is not more than 5nm, and the surface area is not less than 150000m 2 /kg。
8. A concrete as claimed in claim 1The anti-corrosion coating steel fiber for soil is characterized in that the purity of the nano silicon carbide is more than or equal to 99.9 percent, the average grain diameter is less than or equal to 10nm, and the surface area is more than or equal to 100000m 2 /kg。
9. The anti-corrosion coated steel fiber for concrete according to claim 1, wherein the modified nano silica has an average particle diameter of 2 to 5nm and a specific surface area of 800 to 1200m 2 /g。
10. The process for preparing the steel fiber with the anti-corrosion coating for the concrete according to any one of claims 1 to 9, characterized by comprising the following steps:
s1, weighing the components according to the raw material ratio, preparing an anti-corrosion impregnation liquid, adding the modified silicone emulsion, the zinc phosphate powder, the magnesium oxide powder, the nano titanium dioxide, the nano silicon carbide and the modified nano silicon oxide, and uniformly stirring;
s2, adding steel fibers into the anti-corrosion impregnation liquid obtained in the step S1, and stirring to fully contact and mix the steel fibers and the anti-corrosion impregnation liquid;
and S3, air-drying the steel fiber obtained in the step S2 at normal temperature in an environment with the relative humidity not higher than 50% and the temperature of 10-40 ℃, and forming the anti-corrosion coating steel fiber for concrete after the air-drying is finished.
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| CN1544552A (en) * | 2003-11-28 | 2004-11-10 | 厦门大学 | Tunnel fireproof paint based on nano-surface-treatment technology and method for making same |
| BRPI0403088A (en) * | 2004-06-29 | 2006-02-07 | Petru S D Amorim Santa Cruz Ol | Fiber with hand-structured dielectric film |
| CN111286728A (en) * | 2020-03-30 | 2020-06-16 | 沈阳理工大学 | Phosphating solution, phosphate coating, preparation method and application thereof |
| CN115286274A (en) * | 2022-08-24 | 2022-11-04 | 河北工业大学 | Preparation method of alkali-resistant coating of regenerated glass fiber reinforced plastic |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544552A (en) * | 2003-11-28 | 2004-11-10 | 厦门大学 | Tunnel fireproof paint based on nano-surface-treatment technology and method for making same |
| BRPI0403088A (en) * | 2004-06-29 | 2006-02-07 | Petru S D Amorim Santa Cruz Ol | Fiber with hand-structured dielectric film |
| CN111286728A (en) * | 2020-03-30 | 2020-06-16 | 沈阳理工大学 | Phosphating solution, phosphate coating, preparation method and application thereof |
| CN115286274A (en) * | 2022-08-24 | 2022-11-04 | 河北工业大学 | Preparation method of alkali-resistant coating of regenerated glass fiber reinforced plastic |
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Application publication date: 20220913 |