CN112723802A - High-strength dam material and preparation method thereof - Google Patents
High-strength dam material and preparation method thereof Download PDFInfo
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- CN112723802A CN112723802A CN202110117914.6A CN202110117914A CN112723802A CN 112723802 A CN112723802 A CN 112723802A CN 202110117914 A CN202110117914 A CN 202110117914A CN 112723802 A CN112723802 A CN 112723802A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5024—Silicates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2015—Sulfate resistance
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a high-strength dam material, which comprises a base material and a coating material on the surface of the base material, wherein the base material is prepared from fly ash, construction waste recycled aggregate, an alkali metal excitant, silica fume, slag and water, and the coating material is prepared from fly ash, chitosan oligosaccharide, lysozyme, sodium hydroxide, quicklime and polydimethylsiloxane. The application provides a high-strength dam material, which comprises a base material and a coating material, wherein the base material of the dam material is prepared from fly ash and construction waste recycled aggregate, and the base material is matched with an alkali metal activator, so that the strength, the impact resistance, the crack resistance and the corrosion resistance of the material are improved; meanwhile, materials such as fly ash and chitosan oligosaccharide are used as the surface coating of the dam, marine organisms can be prevented from being attached to the surface of the wave-proof dam, the surface corrosion is delayed, and the pH value of the dam can be kept close to the pH value of seawater.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a high-strength dam material and a preparation method thereof.
Background
The coastal dam is not only a first barrier for preventing storm surge, protecting coastal building facilities and guaranteeing a safety system in coastal areas, but also plays an important role in maintaining the stability of water areas in the coast and protecting a coastline from erosion. In recent years, climate change brings a serious challenge to coastal dam construction, coastal dams in China generally have the condition of low construction standard, engineering accident potential is more, and in the constructed protective coastal dam engineering, the single thickness of the dam body of the protective coastal dam in most areas is short and small, and the height of the dam body and the slope protection structure do not reach the standard; moreover, the construction is formed by increasing the height and the thickness of the concrete in the early construction period or in the past year, so that the engineering quality is difficult to meet the standard requirements, and particularly the wind wave resistance and the scouring resistance are poor. When meeting with large storm tide, the dam is easy to break, causing serious disaster and economic loss.
Most of coastal dams are built by block stones and cast by reinforced concrete, and although the dam bodies are firm, the energy dissipation effect on sea tides, sea waves and swell is not obvious, strong impact waves cannot be buffered, and the dam bodies are easily damaged. The coast dams are corroded by seawater for a long time and often damaged prematurely to meet the requirement of the designed service life, particularly, the coast dams are most seriously corroded and damaged in a splash zone, the corrosion speed of the coast dams is 3-10 times of that of a seawater full-immersion zone, and phenomena such as corrosion perforation, local pitting and the like are accompanied, so that a large amount of financial resources are needed for maintenance and reinforcement, and huge economic loss is brought.
At present, the concrete technology is gradually mature, but the transportation cost is continuously increased, so that the price of concrete is increased year by year, the durability problem of a concrete pouring dam structure is gradually exposed, and the concrete serving as a coastal dam material has the defects of short service life, corrosion resistance and concrete strength. At present, measures of 'prevention is mainly' are generally adopted in engineering, and mainly comprise: the concrete surface is coated with a protective layer, a chemical additive or a mineral admixture, and the like, but the above technology is mainly used for surface coating and does not achieve the aims of cracking resistance and corrosion resistance by improving the internal stress mechanism of the concrete. Meanwhile, marine biofouling increases the dead weight of structures in the sea, blocks water flow paths, accelerates surface corrosion, and causes great maintenance cost. At present, the coating of marine antifouling paint containing antifouling agent becomes the most effective, economic and feasible method for solving the fouling of marine organisms, but at present, the influence of the paint containing cuprous oxide on the marine ecological environment is increasingly important, and countries continuously adopt laws to eliminate antifouling systems with high toxicity.
The urban construction of China produces a large amount of construction waste and industrial solid waste, the construction waste mainly comprises bricks, waste concrete, stones and other sundries, wherein the proportion of the concrete is large, the fly ash in a coal-electricity centralized production area is excessive, a large amount of land resources are occupied, and if the waste can be utilized to manufacture the high-strength wave-proof dam, the cost can be greatly reduced, and the environmental pollution can be reduced. The chitosan oligosaccharide is a degradation product of chitin or chitosan prepared by a chemical or enzymatic hydrolysis method, and is low-polymerization-degree glucosamine connected by beta-1-4 glycosidic bonds; the composite material not only has certain special physicochemical properties such as excellent water solubility, biodegradability and biocompatibility, but also has various biological effects including anti-inflammation, antibiosis, antioxidation and the like. The chitosan oligosaccharide is used as a main antibacterial raw material to prepare the anti-corrosion and anti-fouling paint, which is beneficial to protecting the marine ecological environment. Therefore, the method for preparing the high-strength dam material by using the solid wastes not only can realize the reutilization of the solid wastes, but also can ensure the performance of the dam has important significance.
Disclosure of Invention
The technical problem that this application was solved provides a high-strength dyke material for breakwater.
In view of the above, the present application provides a high-strength dam material, which comprises a base material and a coating material on the surface of the base material, wherein the base material is prepared from fly ash, construction waste recycled aggregate, an alkali metal activator, silica fume, slag and water, and the coating material is composed of fly ash, chitosan oligosaccharide, lysozyme, sodium hydroxide, quicklime and polydimethylsiloxane.
Preferably, in the base material, 60-180 parts by weight of fly ash, 150-550 parts by weight of construction waste recycled aggregate, 25-80 parts by weight of slag, 20-50 parts by weight of silica fume, 30-60 parts by weight of alkali metal activator and 25-100 parts by weight of water.
Preferably, in the coating material, 65-120 parts by weight of fly ash, 30-55 parts by weight of chitosan oligosaccharide, 10-30 parts by weight of lysozyme, 25-45 parts by weight of sodium hydroxide, 3-10 parts by weight of quick lime and 5-20 parts by weight of polydimethylsiloxane.
Preferably, in the base material, the construction waste recycled aggregate is selected from recycled coarse aggregate and recycled fine aggregate, the particle size of the recycled coarse aggregate is 5-25 mm, and the particle size of the recycled fine aggregate is not more than 4.5 mm.
Preferably, in the matrix material, the slag is selected from one or two of lithium slag and phosphorous slag, and the content of one type of fly ash in the fly ash is not lower than 85%.
Preferably, in the coating material, the fly ash is selected from C-class fly ash, the particle size of the ultrafine powder in the fly ash is less than 10 microns, and the specific surface area is 600-700 m2/kg。
The application also provides a preparation method of the high-strength dam material, which comprises the following steps:
mixing fly ash, construction waste recycled aggregate, slag and silica fume, adding an alkali metal activator and water, mixing, molding, curing and naturally curing to obtain a base material;
mixing fly ash, chitosan oligosaccharide, lysozyme, sodium hydroxide, quicklime and polydimethylsiloxane to obtain a coating material;
and coating the coating material on the surface of the base material to obtain the high-strength dam material.
Preferably, the thickness of the coating material is 5mm to 15 mm.
The application provides a high-strength dam material, which comprises a base material and a coating material, wherein fly ash and construction waste recycled aggregate are used as the base material of the dam material, the structure of the dam material is improved through an alkali metal excitant, a novel inorganic silicon-aluminum gel material which is polymerized by a silicon-oxygen tetrahedron and an aluminum-oxygen tetrahedron and structurally has a spatial three-dimensional network-shaped bonding structure is formed, and the strength, the impact resistance, the crack resistance and the corrosion resistance of the material are improved; meanwhile, materials such as fly ash and chitosan oligosaccharide are used as the surface coating of the dam, marine organisms can be prevented from being attached to the surface of the wave-proof dam, the surface corrosion is delayed, and the pH value of the dam can be kept close to the pH value of seawater.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
The application provides a high-strength ecological material prepared from industrial solid waste materials such as fly ash and the like, which is used for a high-strength dam material of a breakwater, and the material has the characteristics of high strength, impact resistance, crack resistance and corrosion resistance. The embodiment of the invention discloses a high-strength dam material, which comprises a base material and a coating material on the surface of the base material, wherein the base material is prepared from fly ash, construction waste recycled aggregate, an alkali metal activator, silica fume, slag and water, and the coating material is prepared from fly ash, chitosan oligosaccharide, lysozyme, sodium hydroxide, quicklime and polydimethylsiloxane.
In the high-strength dam material provided by the application, the base material is prepared from fly ash, construction waste recycled aggregate, alkali metal excitant, silica fume, slag and water; more specifically, 60-180 parts by weight of fly ash, in a specific embodiment, the content of the fly ash is 100-150 parts by weight; the content of the fly ash in the fly ash is not lower than 85 percent.
150-550 parts by weight of the construction waste recycled aggregate, and in a specific embodiment, the content of the construction waste recycled aggregate is 250-400 parts by weight; the construction waste recycled aggregate is a material formed by mixing crushed construction waste according to a specific proportion and gradation by means of crushing, screening, grading pretreatment and the like, and is specifically selected from recycled coarse aggregate and recycled fine aggregate, the particle size of the recycled coarse aggregate is 5-25 mm, and the particle size of the recycled fine aggregate is not more than 4.5 mm. The construction waste recycled aggregate is equivalent to sandstone in a cement material.
25-80 parts by weight of the slag, and in a specific embodiment, the content of the slag is 30-60 parts by weight. The slag is specifically selected from one or two of lithium slag and phosphorous slag. The slag advantageously increases reactivity and forms more tetrahedral polymeric material.
20-50 parts by weight of silica fume, in a specific embodiment, the content of the silica fume is 25-45 parts by weight. The silica fume can greatly improve the strength of the material.
30-60 parts by weight of the alkali metal activator, and in a specific embodiment, the content of the alkali metal activator is 40-50 parts by weight. In particular embodiments, the alkali metal activator is selected from Na2O·SiO2NaOH and K2CO3One or more of (a). The fly ash contains a large amount of silicon-aluminum components, and after the fly ash reacts with an alkali metal activator, the fly ash can excite the material to form an inorganic silicon-aluminum gel material which is polymerized by silicon-oxygen tetrahedrons and aluminum-oxygen tetrahedrons and structurally has a spatial three-dimensional network-shaped bonding structure, and the hardness of the inorganic silicon-aluminum gel material is higher than that of portland cement.
The water accounts for 25-100 parts by weight, and in specific embodiments, the water accounts for 30-90 parts by weight.
The coating material consists of fly ash, chitosan oligosaccharide, lysozyme, sodium hydroxide, quicklime and polydimethylsiloxane. More specifically, the fly ash accounts for 65-120 parts by weight, and in a specific embodiment, the content of the fly ash is 80-100 parts by weight. In a specific embodiment, the fly ash is selected from C-class fly ash, the particle size of ultrafine powder in the fly ash is less than 10 microns, and the specific surface area is 600-700 m2/kg。
30-55 parts by weight of chitosan oligosaccharide, and in a specific embodiment, the content of the chitosan oligosaccharide is 35-50 parts by weight.
10-30 parts of lysozyme, and in a specific embodiment, the content of lysozyme is 15-25 parts by weight.
25-45 parts of sodium hydroxide, and in a specific embodiment, the content of the sodium hydroxide is 30-40 parts by weight.
3-10 parts of quicklime, and in a specific embodiment, the content of the quicklime is 5-9 parts by weight.
5-20 parts by weight of polydimethylsiloxane, in a specific embodiment, the content of the polydimethylsiloxane is 10-18 parts by weight.
In the present application, the thickness of the coating material is 5 to 15mm, more specifically, the thickness of the coating material is 8 to 12 mm.
The fly ash, chitosan and the like in the coating material can prevent marine organisms from being attached to the surface of the dam, delay the corrosion of the surface of the dam and keep the pH value of the dam close to the pH value of seawater.
The application also provides a preparation method of the high-strength dam material, which comprises the following steps:
mixing fly ash, construction waste recycled aggregate, slag and silica fume, adding an alkali metal activator and water, mixing, molding, curing and naturally curing to obtain a base material;
mixing fly ash, chitosan oligosaccharide, lysozyme, sodium hydroxide, quicklime and polydimethylsiloxane to obtain a coating material;
and coating the coating material on the surface of the base material to obtain the high-strength dam material.
The high-strength dam material is prepared by respectively preparing a base material and a coating material according to the method, coating the coating material on the surface of the base material, and placing to obtain the dam material.
For further understanding of the present invention, the high strength dam material provided by the present invention is described in detail below with reference to the following examples, and the scope of the present invention is not limited by the following examples.
Example 1
Fully mixing 100 parts by weight of first-grade fly ash, 25mm160 parts by weight of construction waste recycled aggregate coarse aggregate, 4.5mm140 parts by weight of fine aggregate, 30 parts by weight of slag and 25 parts by weight of silica fume, and then mixing Na2O·SiO220 parts by weight of NaOH10 parts by weight of water and 50 parts by weight of water; fully mixing the two mixed materials; after mixing, molding and curing are carried out, and natural curing is carried out;
selecting the material with the grain diameter of 9.3 microns and the specific surface area of 652m290 parts by weight of c-type fly ash per kg, 40 parts by weight of chitosan oligosaccharide, 20 parts by weight of lysozyme, 30 parts by weight of sodium hydroxide, 5 parts by weight of quicklime and 10 parts by weight of polydimethylsiloxane; coating the coating material prepared by mixing with the mixture for 5mm to obtain the dam material after maintenance, and naturally placing to obtain the high-strength dam material。
Example 2
Firstly, 60 parts by weight of first-grade fly ash, 20mm90 parts by weight of coarse aggregate of construction waste recycled aggregate, 2.5mm70 parts by weight of fine aggregate, 25 parts by weight of slag and 20 parts by weight of silica fume are fully mixed, and then K is added2CO350 parts by weight of water and 30 parts by weight of water; fully mixing the two mixed materials; after mixing, molding and curing are carried out, and natural curing is carried out;
selecting the particle size of 8.9 microns and the specific surface area of 687m265 kg of c-type fly ash, 35 parts of chitosan oligosaccharide, 15 parts of lysozyme, 30 parts of sodium hydroxide, 3 parts of quicklime and 10 parts of polydimethylsiloxane; and (3) coating the coating material prepared by mixing for 8mm to the cured dam material, and naturally placing to obtain the high-strength dam material.
Example 3
Firstly, fully mixing 180 parts by weight of first-grade fly ash, 15mm250 parts by weight of coarse aggregate of recycled aggregate of construction waste, 4mm250 parts by weight of fine aggregate, 75 parts by weight of slag and 40 parts by weight of silica fume, and then mixing Na2O·SiO260 parts by weight of water and 90 parts by weight of water; fully mixing the two mixed materials; after mixing, molding and curing are carried out, and natural curing is carried out;
selecting the particle size of 9.2 microns and the specific surface area of 642m2120 parts of c-type fly ash per kg, 50 parts of chitosan oligosaccharide, 30 parts of lysozyme, 40 parts of sodium hydroxide, 5 parts of quick lime and 20 parts of polydimethylsiloxane; and (3) coating the coating material prepared by mixing by 10mm to the cured dam material, and naturally placing to obtain the high-strength dam material.
Table 1 table of performance data of high strength dam material prepared in example
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A high-strength dam material comprises a base material and a coating material on the surface of the base material, and is characterized in that the base material is prepared from fly ash, construction waste recycled aggregate, an alkali metal excitant, silica fume, slag and water, and the coating material is composed of fly ash, chitosan oligosaccharide, lysozyme, sodium hydroxide, quicklime and polydimethylsiloxane.
2. The high strength dam material according to claim 1, wherein the base material comprises 60 to 180 parts by weight of fly ash, 150 to 550 parts by weight of construction waste recycled aggregate, 25 to 80 parts by weight of slag, 20 to 50 parts by weight of silica fume, 30 to 60 parts by weight of alkali metal activator, and 25 to 100 parts by weight of water.
3. A high-strength dam material as claimed in claim 1, wherein the coating material comprises fly ash 65-120 weight parts, chitosan oligosaccharide 30-55 weight parts, lysozyme 10-30 weight parts, sodium hydroxide 25-45 weight parts, quick lime 3-10 weight parts, and polydimethylsiloxane 5-20 weight parts.
4. The high strength dam material according to claim 1, wherein in the base material, the construction waste recycled aggregate is selected from recycled coarse aggregate and recycled fine aggregate, the recycled coarse aggregate has a particle size of 5 to 25mm, and the recycled fine aggregate has a particle size of not more than 4.5 mm.
5. The high strength dam material according to claim 1, wherein in said matrix material, said slag is selected from one or both of lithium slag and phosphorous slag, and the content of one kind of fly ash in said fly ash is not less than 85%.
6. The high-strength dam material according to claim 1, wherein in said coating material, said fly ash is selected from class C fly ash, the particle size of said fly ash ultrafine powder is less than 10 μm, and the specific surface area is 600-700 m2/kg。
7. The method for preparing a high-strength dam material according to claims 1-6, comprising the steps of:
mixing fly ash, construction waste recycled aggregate, slag and silica fume, adding an alkali metal activator and water, mixing, molding, curing and naturally curing to obtain a base material;
mixing fly ash, chitosan oligosaccharide, lysozyme, sodium hydroxide, quicklime and polydimethylsiloxane to obtain a coating material;
and coating the coating material on the surface of the base material to obtain the high-strength dam material.
8. The method of claim 7, wherein the coating material has a thickness of 5mm to 15 mm.
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| CN111732357A (en) * | 2020-08-11 | 2020-10-02 | 华电电力科学研究院有限公司 | System and method for preparing lightweight aggregate by using fly ash and municipal sludge |
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- 2021-01-28 CN CN202110117914.6A patent/CN112723802B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2055821C1 (en) * | 1995-04-05 | 1996-03-10 | Мариничева Татьяна Юрьевна | Composition for decorating protecting cover |
| CN104649626A (en) * | 2013-11-22 | 2015-05-27 | 吕孟龙 | Highly dense alkali-activated coating material |
| CN105948596A (en) * | 2016-06-08 | 2016-09-21 | 广东惠众新材料科技股份有限公司 | Ecological precast concrete mixture |
| CN109206062A (en) * | 2017-06-29 | 2019-01-15 | 河北卓达建材研究院有限公司 | A kind of extrusion molding alkali-activated carbonatite flyash-alkaline residue decorative plate of outer wall and preparation method thereof |
| CN111732357A (en) * | 2020-08-11 | 2020-10-02 | 华电电力科学研究院有限公司 | System and method for preparing lightweight aggregate by using fly ash and municipal sludge |
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