CN113354370B - Preparation method of concrete based on anti-corrosion reinforced fibers - Google Patents
Preparation method of concrete based on anti-corrosion reinforced fibers Download PDFInfo
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- CN113354370B CN113354370B CN202110863146.9A CN202110863146A CN113354370B CN 113354370 B CN113354370 B CN 113354370B CN 202110863146 A CN202110863146 A CN 202110863146A CN 113354370 B CN113354370 B CN 113354370B
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- 239000004567 concrete Substances 0.000 title claims abstract description 133
- 239000000835 fiber Substances 0.000 title claims abstract description 32
- 238000005260 corrosion Methods 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000919 ceramic Substances 0.000 claims abstract description 84
- 239000000843 powder Substances 0.000 claims abstract description 73
- 239000007822 coupling agent Substances 0.000 claims abstract description 36
- 239000004568 cement Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 19
- XPBBUZJBQWWFFJ-UHFFFAOYSA-N fluorosilane Chemical compound [SiH3]F XPBBUZJBQWWFFJ-UHFFFAOYSA-N 0.000 claims abstract 7
- 239000002245 particle Substances 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 30
- 239000002699 waste material Substances 0.000 claims description 30
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 28
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 24
- 239000012783 reinforcing fiber Substances 0.000 claims description 19
- 239000003607 modifier Substances 0.000 claims description 16
- 239000010881 fly ash Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 239000004575 stone Substances 0.000 claims description 14
- 239000006185 dispersion Substances 0.000 claims description 13
- 239000012153 distilled water Substances 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 12
- 238000013329 compounding Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- ZHPNWZCWUUJAJC-UHFFFAOYSA-N fluorosilicon Chemical compound [Si]F ZHPNWZCWUUJAJC-UHFFFAOYSA-N 0.000 description 28
- 230000000694 effects Effects 0.000 description 17
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- 238000012360 testing method Methods 0.000 description 9
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- 230000007797 corrosion Effects 0.000 description 8
- 238000009472 formulation Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
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- 238000004519 manufacturing process Methods 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
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- 238000007792 addition Methods 0.000 description 4
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- 230000003487 anti-permeability effect Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
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- 239000003973 paint Substances 0.000 description 4
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- 230000002776 aggregation Effects 0.000 description 3
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- 238000003379 elimination reaction Methods 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
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- 239000004593 Epoxy Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- BSYQEPMUPCBSBK-UHFFFAOYSA-N [F].[SiH4] Chemical compound [F].[SiH4] BSYQEPMUPCBSBK-UHFFFAOYSA-N 0.000 description 2
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical group [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 2
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- 239000003638 chemical reducing agent Substances 0.000 description 2
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- 229910052731 fluorine Inorganic materials 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
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- 239000005871 repellent Substances 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 239000012467 final product Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
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- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
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Images
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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of concrete preparation, in particular to a preparation method of concrete based on anti-corrosion reinforced fibers 3 C 2 The powder and KH550 are used for modifying basalt fibers to obtain anticorrosion reinforced fibers, and then the anticorrosion reinforced fibers are compounded with ceramic powder, cement, sand, gravel and water which are modified by a fluorosilane coupling agent, and the mixture is uniformly stirred to obtain the concrete. The preparation method of the concrete is simple and easy to operate, and does not contain the addition of iron powder and other substances.
Description
Technical Field
The invention relates to the technical field of concrete preparation, in particular to a preparation method of concrete based on anticorrosion reinforcing fibers.
Background
Concrete is a generic term for engineering composites where aggregates are cemented into a whole by cementitious materials. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete is mixed with water (containing additive and admixture) according to a certain proportion and stirred to obtain the cement concrete, also called common concrete, which is widely applied to civil engineering. The concrete has the characteristics of rich raw materials, low price and simple production process, so that the consumption of the concrete is increased more and more. Meanwhile, the concrete also has the characteristics of high compressive strength, good durability, wide strength grade range and the like. These characteristics make it very widely used, not only in various civil engineering, that is shipbuilding, machinery industry, ocean development, geothermal engineering, etc., but also concrete is an important material.
The concrete has various types, for example, the Chinese patent with the publication number of CN101186471B discloses a concrete, and each cubic meter of the concrete comprises: 390-450 kg of cement, 695-730 kg of sand, 1035-1050 kg of stone, 190-200 kg of water, 60-70 kg of fly ash, 50-60 kg of UEA concrete expanding agent, 6.5-7.35 kg of SP403 pumping agent and 0.6-0.7 kg of Gray fiber; the concrete has good workability, plasticity and pumpability effect, and can effectively prevent the problem that the concrete in an overlong concrete structure is easy to crack.
The Chinese patent with the publication number of CN107489166B discloses a construction process of an anti-seepage corrosion-resistant precast concrete culvert, which solves the problem of seepage caused by deformation of a cold-proof joint and increases the anti-seepage effect of the joint by coating epoxy asphalt paint on the outer surface of the culvert and adding non-curing sizing material at the joint between adjacent culverts, and has the advantages of simple process, simple structure, strong anti-seepage capability, high corrosion resistance and the like. However, the epoxy asphalt paint is coated on the outer surface of the square culvert, the original anti-corrosion effect cannot be achieved due to the construction process, the paint falls off after long-term service and the like, the growth of microorganisms at the falling position of the paint can cause cracks and holes of the concrete square culvert, the defects are expanded, the invasion of the microorganisms is facilitated, and the strength of a concrete structure is threatened.
The above background disclosure is only provided to assist understanding of the inventive concept and technical solutions of the present invention, which do not necessarily belong to the prior art of the present patent application, and should not be used to evaluate the novelty and inventive step of the present application in the case that there is no clear evidence that the above content has been disclosed at the filing date of the present patent application.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve at least one technical problem in the background art, and provides a preparation method of concrete based on anti-corrosion reinforced fibers, which is simple and easy to operate, does not contain the addition of substances such as iron powder and the like, and has the advantages of high strength, strong mildew and algae prevention capability, high anti-permeability registration, low density and the like.
(II) technical scheme
In order to solve the above technical problems or achieve the above technical objects, the present invention provides the following aspects.
In a first aspect, a method for preparing corrosion-resistant reinforcing fibers comprises:
1)Ti 3 AlC 2 fully grinding the powder, adding the powder into 35-40 vol% hydrofluoric acid solution in batches under stirring, performing ultrasonic treatment for at least 6 hours, and reacting at 35-40 ℃ for at least 48 hours; centrifuging for many times, washing with distilled water until pH is not lower than 6, adding distilled water, ultrasonic dispersing, vacuum filtering, and drying to obtain Ti 3 C 2 Powder;
2) ti of step 1) 3 C 2 Adding the powder and KH550 into 50-75% vol ethanol solution to obtain modifier, Ti 3 C 2 The content is not higher than 1 percent, and the content of KH550 is not higher than 4 percent; the basalt fibers are placed in a modifier according to the material-liquid ratio of 1: 20-50, stirred and modified at the temperature of 35-40 ℃ for at least 30min, and taken out and dried to obtain the anti-corrosion reinforced fibers.
According to a specific embodiment, the method for preparing the corrosion-resistant reinforcing fiber comprises at least one of the following features:
-wherein the stirring rate of step 1) is 1200-3000 r/min;
-wherein the amount of hydrofluoric acid solution of step 1) is Ti 3 AlC 2 35-50 times of the weight of the powder;
-wherein the frequency of the ultrasound in the step 1) is 60-100 KHz, and the ultrasound density is 0.6-0.8W/cm 2 ；
-wherein said step 1) drying means drying to constant weight at a temperature not higher than 50 ℃;
-wherein said step 2) Ti 3 C 2 The weight ratio of the powder to the KH550 is 1: 1.5-3.0;
-wherein the stirring rate of the stirring modification in the step 2) is 300-900 r/min;
-wherein said step 2) drying means drying to constant weight at a temperature not higher than 50 ℃.
In the present invention, first, Ti is used 3 AlC 2 Powder preparation of Ti 3 C 2 The powder and KH550 are added into the basalt fiber according to a specific ratio to modify the basalt fiber, so as to prepare the anti-corrosion reinforced fiber, the preparation method is simple, the modified anti-corrosion reinforced fiber is combined to be added into concrete, the concrete can be endowed with excellent impermeability and antibacterial and mildewproof effects, the mildewproof and algae-proof capability of the concrete can be obviously improved, the corrosion of various microorganisms to a concrete structure can be effectively inhibited in practical application, the concrete structure can keep excellent structural strength, and the possible mechanisms comprise: during the modification at low temperature, part of Ti 3 C 2 Is oxidized to TiO 2 Has certain antibacterial and mildewproof effects, and the addition of KH550 can accelerate the addition of Ti 3 C 2 Is oxidized to TiO 2 In addition, compared with the smooth appearance of basalt fiber, the surface of the basalt fiber is coated with KH550 and Ti 3 C 2 The combined modified anticorrosion reinforcing fiber forms a large amount of Si-O groups and Ti on the surface 3 C 2 The particles can obviously improve the roughness of the surface of the basalt fiber, are favorable for the bonding strength with other components after being applied to concrete, further improve the compactness of the concrete, prevent cracks, and improve the mildew and algae resistance and the impermeability of a concrete structure.
In a second aspect, the anticorrosion reinforcing fiber prepared by the method of the first aspect is applied to concrete.
In a third aspect, a method for preparing a concrete based on anti-corrosion reinforced fibers comprises the following steps:
1) preparing a corrosion-resistant reinforcing fiber according to the method of the first aspect;
2) modifying the waste ceramic powder with a fluorosilane coupling agent to obtain modified ceramic powder;
3) adding fly ash into cement, mixing uniformly, adding anti-corrosion reinforced fiber and modified ceramic powder, compounding cement, sand, broken stone and water according to a conventional ratio, and stirring uniformly to obtain the cement.
According to a specific embodiment, the concrete based on the anticorrosion reinforcing fiber comprises the following components in parts by weight:
according to a specific embodiment, the modified ceramic powder is obtained by modifying waste ceramic powder with a fluorosilane coupling agent shown in formula (1).
According to a specific embodiment, the modified ceramic powder is prepared by modifying the waste ceramic powder with a fluorosilane coupling agent, and comprises the following specific steps:
1) cleaning, crushing, ball-milling and drying the waste ceramics to obtain ceramic particles with the particle size not higher than 3 mm;
2) adjusting the pH value of 75-90 vol% ethanol solution to 4-5 to obtain dispersion liquid, adding a fluorosilane coupling agent into the dispersion liquid according to 0.001-0.05 per thousand of the weight of the ceramic particles, and uniformly dispersing to obtain fluorosilane coupling agent solution;
3) and (3) uniformly spraying the fluorosilane coupling agent solution obtained in the step 2) on the surface of the ceramic particles under stirring at room temperature, drying at 45-55 ℃ to constant weight, and grinding until the granularity is not higher than 0.5 mm.
According to a more specific embodiment, the step of modifying the waste ceramic powder with a fluorosilane coupling agent to produce a modified ceramic powder includes at least one of the following features:
-wherein the step 1) scrap ceramic comprises:
such as various ceramic crafts, waste life ceramics of daily application ceramics and the like,
such as waste building ceramics of floor tiles, wall tiles, structural bricks and the like,
other ceramics such as ceramic semi-finished products, electrical insulating ceramics, chemical ceramics, and the like;
-wherein the pH of the dispersion of step 2) can be adjusted with acetic acid;
-wherein, the step 2) is uniformly dispersed, which means at 20-50 KHz, 0.3-0.6W/cm 2 Ultrasonic dispersion for at least 1h under the condition;
-wherein the stirring frequency of the step 3) is 60-300 r/min.
In the technical scheme of the invention, the waste ceramic is modified by applying the fluorosilane coupling agent shown in the formula (1) to prepare modified waste ceramic powder, the modified waste ceramic powder is added into concrete, after the concrete is formed, a silicon-oxygen group is hydrolyzed to generate a silicon-oxygen group, further form hydrogen bond with the surface of the inorganic substrate or condense with active groups such as hydroxyl to form-SiO-M covalent bond (M is inorganic surface), the adhesive effect of the ceramic powder and other components such as cement, fibers and the like can be remarkably improved, the mechanical strength of concrete is remarkably improved, the hydrophobicity of the concrete is further improved by the elimination effect of the modification of the fluorosilane coupling agent on the surface hydroxyl of the inorganic material, the local agglomeration phenomenon of the concrete is reduced, the density uniformity of the formed solid concrete is higher, the surface energy of the concrete can be remarkably reduced by the introduction of the fluorosilane coupling agent, and the self-cleaning performance and the mildew and algae prevention performance are improved.
According to a more specific embodiment, the cement may be chosen from ordinary portland cement.
According to a more specific embodiment, the fly ash has a particle size of 80-200 mesh.
According to a more specific embodiment, the concrete based on the anticorrosion reinforcing fiber can be added with 5-10 parts by weight of a water reducing agent such as a polycarboxylic acid water reducing agent and 5-10 parts by weight of a water repellent agent such as an organosilicon solid water repellent agent per 100 parts by weight of cement.
The core of the technical scheme of the invention is Ti 3 C 2 The powder and KH550 participate in modification of basalt fiber according to a specific proportion to obtain the anticorrosion reinforcing fiber, and the anticorrosion reinforcing fiber is added into concrete, so that the concrete has excellent impermeability and antibacterial and mildewproof effects, the mildewproof and algae-proof capability of the concrete can be obviously improved, the corrosion of various microorganisms to a concrete structure can be effectively inhibited in practical application, and the modification is favorable for anticorrosion reinforcementThe bonding strength of the fiber and other components further improves the compactness of concrete, prevents cracks, improves the mildew and algae resistance and the impermeability of a concrete structure, and keeps excellent structural strength; secondly, the bonding effect of the ceramic powder and other components such as cement, fibers and the like can be remarkably improved after the waste ceramic is modified by the fluorosilane coupling agent, the mechanical strength of concrete is remarkably improved, the hydrophobicity of the concrete is further improved by the elimination effect of the modification of the fluorosilane coupling agent on the surface hydroxyl of the inorganic material, the local agglomeration phenomenon of the concrete is reduced, the density uniformity of the formed solid concrete is higher, the surface energy of the concrete can be remarkably reduced by the introduction of the fluorosilane coupling agent, and the self-cleaning performance and the mildew and algae prevention capabilities are improved; thirdly, the preparation method of the concrete is simple and easy to operate, no production line is needed to be additionally arranged in factory production, no substances such as iron powder are added, and the concrete has the advantages of high strength, strong mildew and algae prevention capability, high anti-permeability registration, low density and the like.
The preferred conditions described above may be combined with each other to arrive at a specific embodiment, based on general knowledge in the art.
The raw materials or reagents involved in the invention are all common commercial products, and the operations involved are all routine operations in the field unless otherwise specified.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
1) the present invention first provides a composition comprising Ti 3 C 2 The powder and KH550 participate in modification of basalt fiber according to a specific proportion to obtain anticorrosion reinforcing fiber, and the anticorrosion reinforcing fiber is added into concrete, so that excellent impermeability and antibacterial and mildewproof effects can be given to the concrete, the mildewproof and algae-proof capabilities of the concrete can be remarkably improved, the corrosion of various microorganisms to a concrete structure can be effectively inhibited in practical application, the modification is favorable for the bonding strength of the anticorrosion reinforcing fiber and other components, the compactness of the concrete is further improved, the generation of cracks is prevented, the mildewproof and algae-proof capabilities and the impermeability of the concrete structure are improved, and the excellent structural strength is kept;
2) the fluorosilane coupling agent can obviously improve the bonding effect of ceramic powder and other components such as cement, fibers and the like after modifying the waste ceramic, obviously improve the mechanical strength of concrete, further improve the hydrophobicity of the concrete by the elimination effect of the modification of the fluorosilane coupling agent on the surface hydroxyl of an inorganic material, reduce the local agglomeration phenomenon of the concrete, ensure that the density uniformity of the formed solid concrete is higher, and obviously reduce the surface energy of the concrete by introducing the fluorosilane coupling agent, and improve the self-cleaning performance and the mildew and algae prevention capacity;
3) the preparation method of the concrete is simple and easy to operate, no production line is required to be additionally arranged in factory production, no substances such as iron powder are added, and the concrete has the advantages of high strength, strong mildew and algae prevention capability, high anti-permeability registration, low density and the like.
The invention adopts the technical scheme for achieving the purpose, makes up the defects of the prior art, and has reasonable design and convenient operation.
Drawings
The foregoing and/or other objects, features, advantages and embodiments of the invention will be more readily understood from the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural view of a fluorosilane coupling agent according to the present invention;
FIG. 2 is a schematic diagram showing the strength test results of the concrete according to the present invention;
FIG. 3 is a schematic diagram of the result of the uniformity quantitative determination of the concrete according to the present invention.
Detailed Description
Those skilled in the art can appropriately substitute and/or modify the process parameters in view of the disclosure herein, but it is specifically noted that all similar substitutes and/or modifications apparent to those skilled in the art are deemed to be included in the present invention. While the products and methods of making described herein have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the products and methods of making described herein may be made and utilized without departing from the spirit and scope of the invention.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The present invention uses the methods and materials described herein; other suitable methods and materials known in the art may be used. The materials, methods, and examples described herein are illustrative only and are not intended to be limiting. All publications, patent applications, patents, provisional applications, database entries, and other references mentioned herein, and the like, are incorporated by reference herein in their entirety. In case of conflict, the present specification, including definitions, will control.
All percentages, parts, ratios, etc., are by weight unless otherwise indicated; additional instructions include, but are not limited to, "wt%" means weight percent, "mol%" means mole percent, "vol%" means volume percent.
The materials, methods, and examples described herein are illustrative only and not intended to be limiting unless otherwise specified. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, suitable methods and materials are described herein.
The basalt fiber and the fly ash used in the technical scheme of the invention can be selected from the prior art or the market, for example, but not limited to, the basalt short fiber can be selected from the market, and has the following properties: the density is 2.6-2.8 g/cm 3 5-50 cm in length, 7-25 μm in diameter, 1050MPa in breaking strength, 35GPa in elastic modulus, 3.5% in elongation at break and 7.5% in alkali resistance.
The present invention is described in detail below.
Example 1: a concrete:
this example provides a concrete comprising sand, crushed stone and cement in conventional proportions with other components as shown in table 1.
TABLE 1 concrete Components
| Components | Parts by weight |
| Anti-corrosion reinforced fiber | 20 |
| Modified ceramic powder | 50 |
| 42.5 Portland cement | 475 |
| Fly ash | 75 |
| Sand | 500 |
| Crushing stone | 1000 |
| Water (W) | 180 |
The concrete of the embodiment is prepared by a method comprising the following steps:
1)Ti 3 AlC 2 fully grinding the powder, slowly adding the powder into 40% hydrofluoric acid solution for 4 times under the stirring of 1500r/min, wherein the weight of the hydrofluoric acid solution is Ti 3 AlC 2 40 times of the powder weight at 65KHz and 0.7W/cm 2 Performing ultrasonic treatment for 12h under the condition, and reacting for 48h at the temperature of 38 ℃; centrifuging for several times, washing with distilled water until pH is not lower than 6, adding 20 times of distilled water, 65KHz, 0.7W/cm 2 Performing ultrasonic dispersion for 2h under the condition, performing suction filtration, and drying at 50 ℃ to constant weight to obtain Ti 3 C 2 Powder; according to Ti 3 C 2 The content of Ti is 0.5 percent and the content of KH550 is 1.2 percent respectively 3 C 2 Adding the powder and KH550 into 60 vol% ethanol solution to obtain modifier; placing basalt fibers into a modifier according to a material-liquid ratio of 1:20, stirring and modifying at 40 ℃ for 45min at a speed of 600r/min, taking out, and drying at 45 ℃ to constant weight to obtain the anticorrosion reinforced fibers;
2) the waste ceramic floor tiles are cleaned, crushed, ball-milled and dried to obtain ceramic particles with the particle size not higher than 3 mm; adjusting pH of 80 vol% ethanol solution to 4.5 with acetic acid to obtain dispersion, adding fluorosilane coupling agent shown in formula (1) into the dispersion according to 0.01 ‰ of ceramic particle weight, 35KHz, 0.5W/cm 2 Carrying out ultrasonic dispersion for 1h under the condition to obtain a fluorosilane coupling agent solution; uniformly spraying a fluorosilane coupling agent solution on the surface of the ceramic particles at room temperature under the stirring of 120r/min, drying at 45 ℃ to constant weight, and grinding until the particle size is not higher than 0.5mm to obtain modified ceramic powder;
3) adding fly ash into cement according to the formula amount, uniformly mixing, adding the anti-corrosion reinforcing fiber and the modified ceramic powder, compounding cement, sand, gravel and water, and uniformly stirring to obtain the anti-corrosion cement.
Example 2: another concrete:
this example provides another concrete, which has substantially the same formulation and preparation method as example 1, except that the concrete of this example is prepared by a method comprising:
1) adding KH550 into 60 vol% ethanol solution according to the content of KH550 of 1.2% to obtain a modifier; placing basalt fibers in a modifier according to a material-liquid ratio of 1:20, stirring and modifying at 40 ℃ at a speed of 600r/min for 45min, taking out, and drying at 45 ℃ to constant weight to obtain anticorrosive reinforced chemical fibers;
2) same as step 2) of example 1;
3) same as step 3 of example 1).
Example 4: the other concrete comprises:
this example provides another concrete, which has substantially the same formulation and preparation method as example 1, except that the concrete of this example is prepared by a method comprising:
1)Ti 3 AlC 2 fully grinding the powder, slowly adding the powder into 40% hydrofluoric acid solution for 4 times under the stirring of 1500r/min, wherein the weight of the hydrofluoric acid solution is Ti 3 AlC 2 40 times of the powder weight at 65KHz and 0.7W/cm 2 Performing ultrasonic treatment for 12h under the condition, and reacting for 48h at the temperature of 38 ℃; centrifuging for several times, washing with distilled water until pH is not lower than 6, adding 20 times of distilled water, 65KHz, 0.7W/cm 2 Performing ultrasonic dispersion for 2h under the condition, performing suction filtration, and drying at 50 ℃ to constant weight to obtain Ti 3 C 2 Powder; according to Ti 3 C 2 The content of Ti is 0.5 percent and the content of KH550 is 0.5 percent respectively 3 C 2 Adding the powder and KH550 into a 60 vol% ethanol solution to obtain a modifier; placing basalt fibers into a modifier according to a material-liquid ratio of 1:20, stirring and modifying at 40 ℃ for 45min at a speed of 600r/min, taking out, and drying at 45 ℃ to constant weight to obtain the anticorrosion reinforced fibers;
2) same as step 2) of example 1;
3) same as step 3 of example 1).
Example 5: another concrete:
this example provides another concrete, which has substantially the same formulation and preparation method as example 1, except that the concrete of this example is prepared by a method comprising:
1)Ti 3 AlC 2 fully grinding the powder, slowly adding the powder into 40% hydrofluoric acid solution for 4 times under the stirring of 1500r/min, wherein the weight of the hydrofluoric acid solution is Ti 3 AlC 2 40 times of the powder weight at 65KHz and 0.7W/cm 2 Performing ultrasonic treatment for 12h under the condition, and reacting for 48h at the temperature of 38 ℃; centrifuging for several times, washing with distilled water until pH is not lower than 6, adding 20 times of distilled water, 65KHz, 0.7W/cm 2 Performing ultrasonic dispersion for 2h under the condition, performing suction filtration, and drying at 50 ℃ to constant weight to obtain Ti 3 C 2 Powder; according to Ti 3 C 2 The Ti content is 0.5 percent and the KH550 content is 3 percent respectively 3 C 2 Adding the powder and KH550 into a 60 vol% ethanol solution to obtain a modifier; placing basalt fiber in a modifier according to a material-liquid ratio of 1:20, stirring at 40 deg.C for modification at 600r/min for 45min, and taking outDrying the fiber at the temperature of 45 ℃ to constant weight to obtain the anticorrosion reinforced fiber;
2) same as step 2) of example 1;
3) same as step 3 of example 1).
Example 6: another concrete:
this example provides another concrete, which has substantially the same formulation and preparation method as example 1, except that the concrete of this example is prepared by a method comprising:
1) according to Ti 3 AlC 2 The powder content is 0.5%, the KH550 content is 3% respectively 3 AlC 2 Adding the powder and KH550 into a 60 vol% ethanol solution to obtain a modifier; placing basalt fibers into a modifier according to a material-liquid ratio of 1:20, stirring and modifying at 40 ℃ for 45min at a speed of 600r/min, taking out, and drying at 45 ℃ to constant weight to obtain the anticorrosion reinforced fibers;
2) same as step 2) of example 1;
3) same as step 3 of example 1).
Example 7: a concrete:
this example provides a concrete comprising sand, crushed stone and cement in conventional proportions with other components as shown in table 2.
TABLE 2 concrete Components
The concrete of the embodiment is prepared by a method comprising the following steps:
1) same as step 2) of example 1;
2) adding fly ash into cement according to the formula amount, uniformly mixing, adding basalt fiber and modified ceramic powder, compounding cement, sand, gravel and water, and uniformly stirring to obtain the cement.
Example 8: another concrete:
this example provides another concrete, which has substantially the same formulation and preparation method as example 1, except that the concrete of this example is prepared by a method comprising:
1) same as step 1) of example 1;
2) the waste ceramic floor tiles are cleaned, crushed, ball-milled and dried to obtain ceramic particles with the particle size not higher than 3 mm; adjusting pH of 80 vol% ethanol solution to 4.5 with acetic acid to obtain dispersion, adding A151 silane coupling agent into the dispersion according to 0.01 ‰ of ceramic particle weight, 35KHz, 0.5W/cm 2 Carrying out ultrasonic dispersion for 1h under the condition to obtain a fluorosilane coupling agent solution; uniformly spraying a fluorosilane coupling agent solution on the surface of the ceramic particles at room temperature under the stirring of 120r/min, drying at 45 ℃ to constant weight, and grinding until the particle size is not higher than 0.5mm to obtain modified ceramic powder; (ii) a
3) Same as step 3 of example 1).
Example 9: another concrete:
this example provides another concrete, which has substantially the same formulation and preparation method as example 1, except that the concrete of this example is prepared by a method comprising:
1) same as step 1) of example 1;
2) the waste ceramic floor tiles are cleaned, crushed, ball-milled and dried to obtain ceramic particles with the particle size not higher than 3 mm; adjusting pH of 80 vol% ethanol solution to 4.5 with acetic acid to obtain dispersion, adding tridecafluorooctyltriethylsilane to the dispersion at 0.01 ‰ of ceramic particle weight, 35KHz, 0.5W/cm 2 Carrying out ultrasonic dispersion for 1h under the condition to obtain a fluorosilane coupling agent solution; uniformly spraying a fluorosilane coupling agent solution on the surface of the ceramic particles at room temperature under the stirring of 120r/min, drying at 45 ℃ to constant weight, and grinding until the particle size is not higher than 0.5mm to obtain modified ceramic powder;
3) same as step 3 of example 1).
Example 10: another concrete:
this example provides a concrete comprising sand, crushed stone and cement in conventional proportions with other components as shown in table 3.
TABLE 3 concrete Components
| Components | Parts by weight |
| Anti-corrosion reinforced fiber | 20 |
| Ceramic powder | 50 |
| 42.5 Portland cement | 475 |
| Fly ash | 75 |
| Sand | 500 |
| Crushing stone | 1000 |
| Water (W) | 180 |
The concrete of the embodiment is prepared by a method comprising the following steps:
1) same as step 1) of example 1;
3) adding fly ash into cement according to the formula amount, uniformly mixing, adding the anti-corrosion reinforced fiber and the ceramic powder, compounding cement, sand, gravel and water, and uniformly stirring to obtain the anti-corrosion cement.
Example 11: a concrete:
this example provides a concrete comprising sand, crushed stone and cement in conventional proportions with other components as shown in table 4.
TABLE 4 concrete Components
| Components | Parts by weight |
| Modified ceramic powder | 50 |
| 42.5 Portland cement | 475 |
| Fly ash | 75 |
| Sand | 500 |
| Crushing stone | 1000 |
| Water (W) | 180 |
The concrete of the embodiment is prepared by a method comprising the following steps:
1) the waste ceramic floor tiles are cleaned, crushed, ball-milled and dried to obtain ceramic particles with the particle size not higher than 3 mm; adjusting the pH of an 80 vol% ethanol solution to 4.5 with acetic acid to obtain a dispersionAdding fluorine-containing silane coupling agent into the dispersion liquid according to 0.01 per mill of the weight of the ceramic particles, wherein the fluorine-containing silane coupling agent is added into the dispersion liquid at 35KHz and 0.5W/cm 2 Carrying out ultrasonic dispersion for 1h under the condition to obtain a fluorosilane coupling agent solution; uniformly spraying a fluorosilane coupling agent solution on the surface of the ceramic particles at room temperature under the stirring of 120r/min, drying at 45 ℃ to constant weight, and grinding until the particle size is not higher than 0.5mm to obtain modified ceramic powder;
2) adding fly ash into cement according to the formula amount, uniformly mixing, adding modified ceramic powder, compounding cement, sand, broken stone and water, and uniformly stirring to obtain the cement.
Example 12: a concrete:
this example provides a concrete comprising sand, crushed stone and cement in conventional proportions with other components as shown in table 5.
TABLE 5 concrete Components
| Components | Parts by weight |
| Anti-corrosion reinforced fiber | 20 |
| 42.5 Portland cement | 475 |
| Fly ash | 75 |
| Sand | 500 |
| Crushing stone | 1000 |
| Water (I) | 180 |
The concrete of the embodiment is prepared by a method comprising the following steps:
1)Ti 3 AlC 2 fully grinding the powder, slowly adding the powder into 40% hydrofluoric acid solution for 4 times under the stirring of 1500r/min, wherein the weight of the hydrofluoric acid solution is Ti 3 AlC 2 40 times of the powder weight at 65KHz and 0.7W/cm 2 Performing ultrasonic treatment for 12h under the condition, and reacting for 48h at the temperature of 38 ℃; centrifuging for several times, washing with distilled water until pH is not lower than 6, adding 20 times of distilled water, 65KHz, 0.7W/cm 2 Performing ultrasonic dispersion for 2h under the condition, performing suction filtration, and drying at 50 ℃ to constant weight to obtain Ti 3 C 2 A powder; according to Ti 3 C 2 The content of Ti is 0.5 percent and the content of KH550 is 1.2 percent respectively 3 C 2 Adding the powder and KH550 into a 60 vol% ethanol solution to obtain a modifier; placing basalt fibers into a modifier according to a material-liquid ratio of 1:20, stirring and modifying at 40 ℃ for 45min at a speed of 600r/min, taking out, and drying at 45 ℃ to constant weight to obtain the anticorrosion reinforced fibers;
2) according to the formula amount, adding fly ash into cement, mixing uniformly, adding anti-corrosion reinforcing fiber, compounding cement, sand, gravel and water, and stirring uniformly to obtain the anti-corrosion cement.
Experimental example 1: and (3) testing the strength:
the concrete obtained in examples 1-2 and 4-12 of the application is tested for compressive strength according to GB/T50081 Standard test method for mechanical Properties of ordinary concrete, and the statistical results are shown in FIG. 2. As can be seen from FIG. 2, the concrete based on the reinforcing fibers has excellent compressive strength, the 7d compressive strength of the concrete obtained in the preferred embodiment example 1 exceeds 36KPa, and the 28d compressive strength exceeds 42 KPa; in addition, as can be seen from FIG. 2, Ti in a proper ratio according to the technical solution of the present application 3 O 2 The powder and KH550 silane coupling agent are used for modifying basalt fibers and carrying out fluorine-silicon treatment on the basalt fibers by the formula (1) of the applicationThe alkane coupling agent has important positive significance for the mechanical strength of the final product concrete by modifying the waste ceramic.
Experimental example 2: and (3) testing the impermeability and the mildew and algae resistance:
in this example, the impermeability is characterized by the impermeability grade, and the mildew and algae resistance is measured by the following method in the prior art: the bacillus solution with activity of 70000U/mL, the mould solution with activity of 60000U/mL and the diatom solution with activity of 50000U/mL are mixed according to the volume ratio of 1:1:1, and then inoculated on the surface of the concrete obtained in examples 1-2 and 4-12, and the concrete is observed to be not mildewed and algae-growing for a long time, so that the quantitative standard of mildew-proof and algae-proof capability is used. The test results are shown in table 6.
TABLE 6 impermeability and resistance to mildew and algae
| Examples | Grade of impermeability | Mildew and |
| 1 | P10 | > |
| 2 | P6 | > |
| 4 | P8 | > |
| 5 | P9 | > |
| 6 | P7 | > |
| 7 | P6 | > |
| 8 | P7 | > |
| 9 | P7 | > |
| 10 | P6 | > |
| 11 | P6 | > |
| 12 | P6 | >100h |
In combination with the above table, it can be seen from examples 1 to 2, 4 to 7, and 11 that Ti is present in a specific ratio 3 O 2 The powder and the KH550 silane coupling agent modify basalt fibers and the basalt fibers are added into concrete, so that the basalt fibers have a vital effect on improving the impermeability grade and the mildew and algae resistance of the concrete, and in addition, the A151 silane coupling agent is combined with the A151 silane coupling agent in the embodiment 8The coupling agent modifies the waste ceramic particles, the waste ceramic particles are modified by tridecafluorooctyltriethylsilane in example 9, the waste ceramic particles are not modified at all in example 10, and the modified ceramic powder is not added in example 12, so that the fluorosilane coupling agent shown in the formula (1) of the application has a significant influence on the improvement of the anti-permeability grade and the mildew and algae resistance of the modified waste ceramic particles when the modified waste ceramic particles are added into concrete.
Experimental example 3: and (3) uniformity inspection:
the concrete obtained in examples 1 to 2 and 4 to 12 was tested for homogeneity as follows:
and (3) qualitative uniformity test: splitting the completely hardened concrete block, and visually observing whether the components of the section are uniformly distributed;
and (3) carrying out uniformity quantitative inspection: taking a completely hardened concrete block (with the height of 1m), detecting the density rho of an upper layer (0-10 cm) and the average density rho of a lower layer (90-100 cm), and calculating a uniformity quantitative value by the formula (2):
storage stability: and (3) storing the concrete block for 30 days at normal temperature and normal pressure, and observing whether the surface of the concrete block has cracks.
The results of the qualitative homogeneity test and the storage stability are shown in Table 7, and the results of the quantitative homogeneity test are shown in FIG. 3.
TABLE 7 concrete homogeneity
| Examples | Qualitative test for | Storage stability | |
| 1 | Uniformity | Without |
|
| 2 | Uniformity | Without |
|
| 4 | Uniformity | Without |
|
| 5 | Uniformity | Without |
|
| 6 | Uniformity | Without |
|
| 7 | Uniformity | Without |
|
| 8 | Slightly uneven | Without |
|
| 9 | Slightly uneven | Without |
|
| 10 | Slightly uneven | Without |
|
| 11 | Slightly uneven | Without |
|
| 12 | Unevenness of | Without cracks |
As can be seen from Table 7 and FIG. 3, the concrete of example 1, which is a preferred embodiment of the present invention, has excellent uniformity and storage stability, and the cured cross section has uniform distribution of the components, no cracks on the appearance after 30 days of storage, and a small quantitative value of uniformity, indicating that the concrete has uniform solid density after molding. In addition from embodiment 8 ~ 12, can also see that the fluorine silane coupling agent has apparent influence to the homogeneity of concrete to the abandonment ceramic particles is modified, compares in utilizing with A151 silane coupling agent or tridecafluorooctyltriethylsilane, uses this application fluorine silane coupling agent is favorable to promoting the density homogeneity of solid concrete after the shaping more to the abandonment ceramic particles is modified.
Conventional techniques in the above embodiments are known to those skilled in the art, and therefore, will not be described in detail herein.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
While the above detailed description has shown, described, and pointed out novel features as applied to various embodiments, it will be understood that various omissions, substitutions, and changes in the form and details of the device or method illustrated may be made without departing from the spirit of the disclosure. In addition, the various features and methods described above may be used independently of one another, or may be combined in various ways. All possible combinations and sub-combinations are intended to fall within the scope of the present disclosure. Many of the embodiments described above include similar components, and thus, these similar components are interchangeable in different embodiments. While the invention has been disclosed in the context of certain embodiments and examples, it will be understood by those skilled in the art that the invention extends beyond the specifically disclosed embodiments to other alternative embodiments and/or uses and obvious modifications and equivalents thereof. Accordingly, the invention is not intended to be limited by the specific disclosure of preferred embodiments herein.
The invention is not the best known technology.
Claims (2)
1. The preparation method of the concrete based on the anti-corrosion reinforced fiber is characterized by comprising the following steps:
1) preparing anticorrosion reinforcing fiber;
2) modifying the waste ceramic powder with a fluorosilane coupling agent to obtain modified ceramic powder;
3) adding fly ash into cement, mixing uniformly, adding anticorrosive reinforcing fiber and modified ceramic powder, compounding sand, broken stone and water according to a conventional ratio, and stirring uniformly to obtain the cement;
the fluorosilane coupling agent has a structure shown in a formula (1),
the preparation method of the anti-corrosion reinforced fiber comprises the following steps:
1)Ti 3 AlC 2 fully grinding the powder, adding the powder into 35-40% vol hydrofluoric acid solution in batches under stirring, performing ultrasonic treatment for at least 6 hours, and reacting at 35-40 ℃ for at least 48 hours; centrifuging for many times, washing with distilled water until pH is not lower than 6, adding distilled water, ultrasonic dispersing, vacuum filtering, and drying to obtain Ti 3 C 2 A powder;
2) ti of step 1) 3 C 2 Adding the powder and KH550 into 50-75% vol ethanol solution to obtain modifier, Ti 3 C 2 The content is not higher than 1 percent, and the content of KH550 is not higher than 4 percent; placing the basalt fibers in a modifier according to a material-liquid ratio of 1: 20-50, stirring and modifying at the temperature of 35-40 ℃ for at least 30min, taking out, and drying to obtain the anticorrosion reinforced fibers;
the amount of the hydrofluoric acid solution in the step 1) of preparing the anti-corrosion reinforced fiber is Ti 3 AlC 2 35-50 times of the weight of the powder;
preparation of anti-corrosive reinforcing fiber Ti in step 2) 3 C 2 The weight ratio of the powder to the KH550 is 1: 1.5-3.0;
the method for preparing the modified ceramic powder by modifying the waste ceramic powder with the fluorosilane coupling agent comprises the following specific steps:
1) cleaning, crushing, ball-milling and drying the waste ceramics to obtain ceramic particles with the particle size not higher than 3 mm;
2) adjusting the pH value of 75-90 vol% ethanol solution to 4-5 to obtain dispersion liquid, adding a fluorosilane coupling agent into the dispersion liquid according to 0.001-0.05 per thousand of the weight of the ceramic particles, and uniformly dispersing to obtain fluorosilane coupling agent solution;
3) and (3) uniformly spraying the fluorosilane coupling agent solution obtained in the step 2) on the surface of the ceramic particles under stirring at room temperature, drying at 45-55 ℃ to constant weight, and grinding until the granularity is not higher than 0.5 mm.
2. The method of claim 1, wherein: the waste ceramics include: the ceramic comprises waste domestic ceramics and waste building ceramics, wherein the waste domestic ceramics comprise various ceramic crafts and daily application ceramics, and the waste building ceramics comprise floor tiles and wall tiles.
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| CN109503071A (en) * | 2018-11-30 | 2019-03-22 | 武汉城开新兴建材有限责任公司 | Clear-water concrete |
| CN110734659A (en) * | 2019-11-19 | 2020-01-31 | 安徽工业大学 | ternary composite filler of glass fiber powder/polypyrrole/Ti 3C2TxMXene, preparation method and application |
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Denomination of invention: A preparation method of concrete based on anti-corrosion reinforced fibers Effective date of registration: 20231012 Granted publication date: 20220927 Pledgee: Zhejiang Longyou rural commercial bank Limited by Share Ltd. Pledgor: GUANGMING RAILROAD HOLDING CO.,LTD. Registration number: Y2023330002297 |