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CN119158864A - A method for improving the long-term solidification effect of fly ash cement solidified body - Google Patents

A method for improving the long-term solidification effect of fly ash cement solidified body Download PDF

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Publication number
CN119158864A
CN119158864A CN202411248034.2A CN202411248034A CN119158864A CN 119158864 A CN119158864 A CN 119158864A CN 202411248034 A CN202411248034 A CN 202411248034A CN 119158864 A CN119158864 A CN 119158864A
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fly ash
solidified body
cement
asphalt
cement solidified
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CN119158864B (en
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钟伟瑶
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Guangdong Yingke Waterproof Reinforcement Technology Co ltd
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Guangdong Yingke Waterproof Reinforcement Technology Co ltd
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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
    • C04B28/02—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
    • C04B28/06—Aluminous cements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/20—Agglomeration, binding or encapsulation of solid waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • C04B18/088—Flue dust, i.e. fly ash in high volume fly ash compositions
    • 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
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • 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
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • 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
    • C04B41/70—Coating or impregnation for obtaining at least two superposed coatings having different compositions
    • C04B41/71—Coating or impregnation for obtaining at least two superposed coatings having different compositions at least one coating being an organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B2101/00—Type of solid waste
    • B09B2101/30—Incineration ashes
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
    • C04B2111/00784—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes for disposal only
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, which belongs to the technical field of fly ash solidification and comprises the following steps of S1, collecting household garbage incineration fly ash, carrying out hydrothermal treatment on the household garbage incineration fly ash to form uniform slurry, S2, adjusting the viscosity of the slurry, gradually adding synthetic fibers or metal fibers into the slurry with the adjusted viscosity to obtain slurry containing the synthetic fibers or the metal fibers, S3, pouring and condensing to obtain the cement solidified body, crushing the cement solidified body by using a jaw crusher, and respectively heating polymer modified asphalt and matrix asphalt to 160-185 ℃ to obtain the asphalt-coated cement solidified body. The invention can improve the carbonatability resistance of the solidified fly ash cement, prevent the aging of the solidified fly ash cement, improve the long-term stability of the solidified fly ash cement and improve the long-term solidifying effect of the solidified fly ash cement.

Description

Method for improving long-term curing fly ash effect of fly ash cement solidified body
Technical Field
The invention relates to the technical field of fly ash solidification, in particular to a method for improving the long-term fly ash solidification effect of a fly ash cement solidified body.
Background
The household garbage incineration fly ash (hereinafter referred to as 'fly ash') contains Cd, cr, cu, pb, hg, ni heavy metal substances and dioxin pollutants, has huge production quantity, can pollute underground water body when being disposed, and is one of the key points and difficulties of dangerous waste management in China. The fly ash also contains salt and chloride, and the chloride in the fly ash mainly comprises two forms of water-soluble chloride and non-water-soluble chloride. The water-soluble chlorides mainly comprise sodium chloride (NaCl), potassium chloride (KCl), calcium chloride (CaCl 2), calcium chloride hydroxide (CaClOH) and the like, and are mainly derived from biomass components in incineration waste, kitchen waste and intermediate products of flue gas dehydrochlorination. The water-insoluble chlorides mainly include Friedel's salts (3cao·al 2O3·CaCl2·10H2 O), alOCl, etc., which are mainly formed under the high temperature condition of garbage incineration. The current mainstream treatment mode is 'blocking', namely, the fly ash is buried after being chelated and solidified, namely, the fly ash is added with cement or chelating agent, and the characteristic of the fly ash is more stable through a physical or chemical mode and then is sent to the landfill. As the cure stabilization process proceeds, heavy metals may transition from a metastable state to a stable state, which is typically associated with the chemical action of a curing agent (e.g., cement or chelating agent). Although the stable heavy metals are not easily leached out, the initial solidified body has a good heavy metal fixing effect, but since the fixing effect of the fly ash is not sufficient, the fly ash solidified body is easily affected by the environment in the landfill, and the long-term effect of the fly ash fixing is still to be improved. Specifically, the chelating agent fly ash solidification is characterized in that, although the inorganic agent-stabilized fly ash increases Rong Xiao, heavy metals in the solidified body are easily dissolved out under the acidic condition, which causes harm to the environment and can not meet the long-term stable safety requirement of dangerous waste. The organic agent-immobilized fly ash is more stable and has a smaller amount of added inorganic agent and a better solidification effect, but the organic agent is more expensive than the inorganic agent. Because the chemical composition of the fly ash is complex, the existence form of heavy metal in the fly ash is unstable, the selectivity of inorganic medicament and organic medicament to heavy metal is different, and the fly ash is difficult to stably fix all heavy metal and has insufficient fixing effect, the application of the fly ash in treating the fly ash of the incineration of the household garbage is restricted to a certain extent.
However, the fixation of heavy metals in cement-cured systems is more stable than in chelate-stabilized systems. Studies have shown that the fixing effect of cement curing systems on heavy metals may be attenuated by aging of the curing stabilization system. In the early stages of aging, leaching of heavy metals may be relatively low, but as time goes by, if the solidified body has cracks, a channel may be provided for heavy metal migration, in a slightly acidic environment, the concentration of hydrogen ions in the solution increases, which may reduce the precipitation solubility of heavy metals in the cement solidified body, so that the heavy metals are easier to exist in ionic form, and the heavy metals are easier to leach out of the cement solidified body, in addition to that, since the waste incineration fly ash contains higher chloride ions, the chloride ions may form stable complexes with various heavy metal ions in the fly ash, and the solubility of these complexes is generally higher than that of corresponding metal hydroxides or metal oxides, so that the concentration of heavy metal ions in the leaching solution increases, the problem of heavy metal ion leaching after the cement solidified body ages increases, and the accumulation effect may cause the concentration of heavy metals to increase on the surface or near-surface area of the cement solidified body, and finally exceed the limit. If there is a problem with the impermeable layer of the landfill site or the management is not good, the heavy metals in the fly ash still can enter the environment by seepage and other modes.
The fly ash asphalt curing is to take asphalt material as curing agent, mix with fly ash evenly at a certain temperature to generate saponification reaction, and make harmful substances contained in asphalt to form curing body, thus obtaining stability. Because asphalt is a hydrophobic substance, the complete asphalt solidified body has excellent waterproof performance. Asphalt also has good cohesiveness and chemical stability, and has high corrosion resistance to most acids and bases.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, which can improve the carbonation resistance of the fly ash cement solidified body, prevent the aging of the fly ash cement solidified body, generate cracks on the surface of the solidified body, reduce the risk of leaching heavy metals in the fly ash cement solidified body caused by the increase of salt and chloride ions in the fly ash, improve the long-term stability of the fly ash cement solidified body and improve the long-term curing fly ash effect of the fly ash cement solidified body.
The invention adopts the following technical scheme:
A method for improving the long-term curing fly ash effect of a fly ash cement solidified body, comprising the following steps:
S1, collecting household garbage incineration fly ash, placing the household garbage incineration fly ash in a hydrothermal reaction kettle, performing hydrothermal treatment, collecting chlorine generated by decomposing fly ash chloride in a hydrothermal treatment process through a closed pipeline system connected with the hydrothermal reaction kettle after the hydrothermal treatment is completed, placing a hydrothermal treatment product in the hydrothermal reaction kettle into a stirring device after the chlorine is collected, placing cement into the stirring device for stirring, and uniformly stirring the added water to form uniform slurry;
S2, selecting synthetic fibers or metal fibers with proper length, adjusting the viscosity of the slurry to enable the synthetic fibers or metal fibers to be uniformly dispersed in the slurry, gradually adding the synthetic fibers or metal fibers into the slurry with the adjusted viscosity, stirring at a low speed to start mixing, so as to avoid damage to the synthetic fibers or metal fibers, and gradually increasing the stirring speed to enable the synthetic fibers or metal fibers to be uniformly dispersed in the slurry to obtain the slurry containing the synthetic fibers or metal fibers;
And S3, pouring and coagulating the slurry containing the synthetic fiber or the metal fiber to obtain a cement solidified body, crushing the cement solidified body by using a jaw crusher, adding the crushed cement solidified body into an asphalt concrete stirring device, heating the polymer modified asphalt and the matrix asphalt to 160-185 ℃ respectively, keeping the temperature range, adding the heated polymer modified asphalt into the asphalt concrete stirring device, uniformly stirring to enable the surface of the crushed cement solidified body to be provided with a layer of the polymer modified asphalt, cooling and coagulating, forming a polymer modified asphalt layer on the surface of the crushed cement solidified body, heating the cooled and coagulated polymer modified asphalt layer by using a heating device of the asphalt concrete stirring device, softening the cooled and coagulated polymer modified asphalt layer so that the crushed cement solidified body can be separated, continuously adding the heated matrix asphalt into the asphalt concrete stirring device, uniformly stirring the separated crushed cement solidified body and the heated matrix asphalt, and uniformly heating the cooled matrix asphalt to form a solidified asphalt layer on the surface of the crushed cement solidified body, and coating the solidified asphalt layer.
Further, in step S2, the synthetic fiber or the metal fiber is stirred using a forced stirrer.
Further, in step S1, in the stirring device, the weight ratio of the fly ash, the cement and the water is 1:0.2:3.
In step S2, the synthetic fiber is one of a polyester fiber, a polyamide fiber, a polyacrylonitrile fiber, a polyvinyl formal fiber, a polyvinyl chloride fiber, and a polyurethane elastic fiber, and the metal fiber is one of a stainless steel fiber, a copper fiber, a nickel fiber, and an aluminum fiber.
Further, in step S1, the cement is sulphoaluminate cement.
Further, in step S3, the jaw crusher is one of a simple pendulum jaw crusher, a compound pendulum jaw crusher, or a hydraulic jaw crusher.
Further, the jaw crusher is one of a simple pendulum jaw crusher, a compound pendulum jaw crusher or a hydraulic jaw crusher.
Further, in step S3, the polymer modified asphalt is obtained by modifying the matrix asphalt with one of SBS (styrene-butadiene-styrene block copolymer), SBR (styrene butadiene rubber), EVA (ethylene-vinyl acetate copolymer), PE (polyethylene), polyurethane (PU).
Further, in step S1, the cement is put into the stirring device to be stirred, and at the same time, the added water is stirred uniformly, and in this step, the sodium tetraphenylborate is also added to be stirred uniformly.
Further, after the asphalt-coated cement solidified body is obtained in the step S3, the mixture of the insoluble phosphorus salt and the biochar is embedded in the surface layer of the soil of the household garbage landfill after the insoluble phosphorus salt and the biochar are mixed, the phosphate-dissolving bacteria microbial preparation is applied to the soil of the household garbage landfill, and then the asphalt-coated cement solidified body is buried in the household garbage landfill.
Further, the poorly soluble phosphorus salt is at least one of Ca(H2PO4)2、Ca(H2PO4)2·CaHPO4、Ca10(PO4)6(OH)2.
Compared with the prior art, the invention has the beneficial effects that:
The invention provides a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, which is characterized in that after the fly ash is subjected to hydrothermal treatment, silicon dioxide (SiO 2) and sodium oxide (Na 2 O) in the fly ash react with water to generate sodium silicate (Na 2SiO3), sodium silicate is subjected to hydrolysis reaction to generate silicic acid and sodium hydroxide, the solubility of sodium silicate in water and acid is reduced, chlorine ion content in the subsequent fly ash cement solidified body is reduced after chlorine generated by decomposing fly ash chloride in the hydrothermal treatment process is collected, the influence of leaching of heavy metal brought by chlorine ions from the cement solidified body is reduced, meanwhile, sodium silicate is a strong alkali weak acid salt which can react with heavy metal ions (such as Pb 2+、Cd2+、Cr3+ and the like) in the fly ash to generate heavy metal silicate, the heavy metal silicate generally has lower solubility, so that the heavy metal silicate is not easy to dissolve in aqueous solution, the sodium silicate is generated, the solubility of sodium silicate in water and acid is reduced, the hygroscopicity of sodium salt in the cement solidified body is reduced, the crack and the damage of the cement solidified body are caused, the sodium salt is prevented from being generated, the sodium borate is added into a phenyl borate stirring device, and the sodium borate is partially stirred in the stirring process And sodium ion (Na +), tetraphenylborate ion and potassium ion undergo ion exchange reaction to form tetraphenylboron potassium (KB (C 6H5)4) and sodium ion, the tetraphenylboron potassium is a poorly water-soluble compound, so that the tetraphenylboron potassium can be stabilized in a precipitated form in a fly ash cement solidified body, the hygroscopicity of potassium ion in the cement solidified body is reduced, the generation of cracks and breakage of the fly ash cement solidified body is avoided, and the durability of the fly ash cement solidified body can be improved; the matrix asphalt has good hydrophobicity, so that the asphalt solidified body can resist moisture penetration, reduce the erosion effect of the moisture on the fly ash cement solidified body, indirectly reduce the permeability of CO 2 because water is a carrier of CO 2, improve the carbonation resistance of the fly ash cement solidified body, resist external factors influencing cement aging, prevent the aging of the fly ash cement solidified body, and the cohesiveness of the asphalt can help to fix chloride ions, reduce the migration and leaching of the chloride ions in the fly ash from the cement solidified body, thereby solving the problem of leaching of heavy metal ions after the aging of the cement solidified body.
After the asphalt-coated cement solidified body is obtained, after the indissolvable phosphorus salt and the biochar are mixed, the mixture of the indissolvable phosphorus salt and the biochar is embedded in the surface layer of the soil of the household garbage landfill, the phosphate-dissolving bacteria microbial preparation is applied to the soil of the household garbage landfill, then the asphalt-coated cement solidified body is embedded in the household garbage landfill, the phosphate-dissolving bacteria have the highest activity under the condition of slightly acidic to neutral pH, because the phosphate-dissolving bacteria can secrete organic acid more effectively to dissolve the indissolvable phosphorus salt, the soluble phosphate can effectively stabilize various heavy metals in the fly ash, including lead (Pb) and cadmium (Cd), the dissolved phosphate ions are combined with the heavy metal ions to form insoluble heavy metal phosphate precipitates, the generated precipitates are accumulated in the fly ash cement solidified body due to aging, the generated precipitates can be restored in the soil, the bioavailability and mobility of the heavy metal are reduced, and the risk of entering the environment through leakage of the heavy metal in the fly ash is reduced.
Under landfill geochemical conditions, various degrees of aging of the fly ash solidification stabilized product can occur, resulting in long-lasting fixation of heavy metals.
Hydroxyapatite nanoparticles (Ca 10(PO4)6(OH)2), phosphate ore, and superphosphate (Ca (H 2PO4)2)) sequester lead, and are capable of forming stable polychlorinated lead ore (Pb 5 (PO 4) 3 (Cl/F/OH)), precipitating copper ions and zinc ions in the fly ash, and precipitating lead ions in the fly ash, forming a lead ion stable compound.
Detailed Description
The present invention will be further described with reference to specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
Synthetic or metal fibers were purchased from the scientific company, belkyo carbofuran.
Sulphoaluminate cements were purchased from wuhanji chemical industry limited.
Sodium tetraphenylborate is supplied by Shanghai Ala Biochemical technology Co.
Ca(H2PO4)2、Ca(H2PO4)2·CaHPO4、Ca10(PO4)6(OH)2、 Phosphate ore is obtained from Sixin Yunnan mining Co, inc., and is mainly composed of fluorapatite [ Ca 5(PO4) 3F ].
Purchased from national pharmaceutical group chemical company, inc.
The polymer modified asphalt is obtained by adding a certain weight proportion of synthetic high molecular polymer (such as SBS, SBR, EVA and the like) into common matrix asphalt to carry out physical or chemical modification.
Matrix asphalt was purchased from Hubei Enxing Biotechnology Co.
The sample of the fly ash from the incineration of the household garbage is taken from a household garbage incineration plant in Hunan province, and the water content is 8.253%. And (3) drying the collected fly ash for 24 hours at 105 ℃, primarily crushing, grinding, sieving, and taking the sieved fly ash as a research object.
Jaw crusher 150 x 250 was purchased from Hebi city Feng Yuan laboratory instruments, inc.
Forced mixers are available from Zhengzhou Changli mechanical manufacturing Co.
Asphalt concrete mixing plant LB-2000 was purchased from Stauntonized road construction machines Co.
Example 1
The embodiment provides a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, which comprises the following steps:
S1, collecting household garbage incineration fly ash, placing the household garbage incineration fly ash in a hydrothermal reaction kettle for carrying out hydrothermal treatment, collecting chlorine generated by decomposing fly ash chloride in a hydrothermal treatment process through a closed pipeline system connected with the hydrothermal reaction kettle after the hydrothermal treatment is completed, putting a hydrothermal treatment product in the hydrothermal reaction kettle into a stirring device after the chlorine collection is completed, putting sulfoaluminate cement into the stirring device for stirring, adding a proper amount of sodium tetraphenylborate, and simultaneously adding a proper amount of water for stirring uniformly to form uniform slurry;
S2, selecting polyester fibers with proper length, adjusting the viscosity of the slurry to enable the polyester fibers to be uniformly dispersed in the slurry, wherein proper water-to-gel ratio is favorable for improving the dispersibility of the polyester fibers in the slurry, avoiding sinking of the polyester fibers caused by over-dilution of the slurry, starting from a slurry with medium viscosity, then gradually adjusting according to the dispersion condition and construction requirement of the fibers, selecting fibers with proper length, wherein the fibers with too long length are possibly difficult to disperse, and the fibers with too short length possibly cannot provide sufficient reinforcing effect;
S3, pouring and coagulating the slurry containing the polyester fibers to obtain a cement solidified body, crushing the cement solidified body by using a jaw crusher, putting the crushed cement solidified body into asphalt concrete stirring equipment, heating the styrene-butadiene-styrene block copolymer modified asphalt and the matrix asphalt to 160 ℃ respectively, keeping the temperature range, changing the styrene-butadiene-styrene block copolymer modified asphalt and the matrix asphalt from a semi-solid state to a flowing state, adding the heated styrene-butadiene-styrene block copolymer modified asphalt into asphalt concrete stirring equipment, uniformly stirring, enabling the surface of the crushed cement solidified body to be provided with a layer of styrene-butadiene-styrene block copolymer modified asphalt, cooling and solidifying, forming a styrene-butadiene-styrene block copolymer modified asphalt layer on the surface of the crushed cement solidified body, heating the cooled and solidified styrene-butadiene-styrene block copolymer modified asphalt layer by using a heating device of asphalt concrete stirring equipment, enabling the cooled and solidified styrene-butadiene-styrene block copolymer modified asphalt to be separated from each other, enabling the cooled and solidified styrene block copolymer to be separated from the ground to form a layer of styrene-butadiene-styrene block copolymer modified asphalt, continuously stirring the cooled and then adding the cooled and solidified asphalt to the matrix asphalt concrete stirring equipment to form the asphalt concrete after the cement solidified layer, obtaining the asphalt-coated cement solidified body.
The asphalt concrete stirring equipment is specially used for drying, heating, sieving and metering sand stone material, adding proper quantity of filling material (stone powder) and uniformly stirring the above-mentioned material and hot asphalt liquor according to a certain mixing ratio so as to obtain the invented asphalt mixture
The fiber reinforced cement solidified body can improve the tensile strength, the bending strength and the impact toughness of the cement solidified body, reduce the formation and the expansion of cracks, show better durability under severe environments such as freeze thawing cycle, chemical erosion and the like, and can slow down the shrinkage of the cement solidified body, as the fiber can bridge micro cracks, reduce the possibility of the micro cracks developing into macro cracks, improve the crack resistance of concrete and reduce the micro cracks caused by shrinkage. The asphalt layer and the cement solidified layer are well bonded, and the bonding force is enhanced.
Sodium tetraphenylborate has relatively good solubility in water, is slightly hygroscopic, and can be dissolved in water, acetone, acetonitrile and dimethylformamide, but is insoluble in benzene and carbon tetrachloride. Sodium tetraphenylborate is easy to decompose in aqueous solution, and is generally stable in storage at pH of 8-9 or 5-6. This makes the sodium tetraphenylborate easier to handle and use in the laboratory, especially where water solubility is required.
Potassium tetraphenylborate is generally considered to be poorly soluble in water, but it can be dissolved in an organic solvent such as acetone, methanol or dimethyl sulfoxide. This solubility characteristic of potassium tetraphenylborate makes it particularly useful in organic synthesis, especially when the reaction is desired in a non-aqueous solvent.
Although unmodified base asphalt has some binding capacity, polymer modified asphalt is used as an interface treatment agent in order to ensure good adhesion between the asphalt layer and the fly ash cement cured layer.
The sulphoaluminate cement in the embodiment is a cement variety with better chlorine ion permeation resistance.
Example 2
The embodiment provides a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, which comprises the following steps:
S1, collecting household garbage incineration fly ash, placing the household garbage incineration fly ash in a hydrothermal reaction kettle for carrying out hydrothermal treatment, collecting chlorine generated by decomposing fly ash chloride in a hydrothermal treatment process through a closed pipeline system connected with the hydrothermal reaction kettle after the hydrothermal treatment is completed, putting a hydrothermal treatment product in the hydrothermal reaction kettle into a stirring device after the chlorine collection is completed, putting sulfoaluminate cement into the stirring device for stirring, adding a proper amount of sodium tetraphenylborate, and simultaneously adding a proper amount of water for stirring uniformly to form uniform slurry;
S2, selecting polyamide fibers with proper length, adjusting the viscosity of the slurry to ensure that the polyamide fibers are uniformly dispersed in the slurry, wherein proper water-to-gel ratio is favorable for improving the dispersibility of the polyamide fibers in the slurry, avoiding sinking of the polyamide fibers caused by over-dilution of the slurry, starting from a slurry with medium viscosity, then gradually adjusting according to the dispersion condition and construction requirement of the fibers, selecting the fibers with proper length, wherein the fibers with too long length are possibly difficult to disperse, and the fibers with too short length are possibly incapable of providing a sufficient reinforcing effect;
And S3, pouring and coagulating the slurry containing polyamide fibers to obtain a cement solidified body, crushing the cement solidified body by using a jaw crusher, adding the crushed cement solidified body into asphalt concrete stirring equipment, heating the ethylene-vinyl acetate copolymer modified asphalt and the matrix asphalt to 165 ℃ respectively by using a heating device of the asphalt concrete stirring equipment, keeping the temperature range, changing the ethylene-vinyl acetate copolymer modified asphalt and the matrix asphalt from a semi-solid state to a flowing state, adding the heated ethylene-vinyl acetate copolymer modified asphalt into the asphalt concrete stirring equipment, uniformly stirring, enabling the surface of the crushed cement solidified body to be provided with a layer of ethylene-vinyl acetate copolymer modified asphalt, cooling and solidifying, forming an ethylene-vinyl acetate copolymer modified asphalt layer on the surface of the crushed cement solidified body, heating the cooled and solidified ethylene-vinyl acetate copolymer modified asphalt layer by using a heating device of the asphalt concrete stirring equipment, enabling the cooled and solidified ethylene-vinyl acetate copolymer modified asphalt layer to be softened, enabling the crushed cement solidified body to be separated, continuously adding the heated matrix asphalt into the separated and heated matrix asphalt concrete to form a uniform asphalt layer, and uniformly coating the cement solidified asphalt body on the cooled and solidifying the ground asphalt concrete after the cement solidified body is subjected to stirring to form the asphalt concrete after the asphalt concrete is uniformly solidified.
The asphalt concrete stirring equipment is specially used for drying, heating, sieving and metering sand stone material, adding proper quantity of filling material (stone powder) and uniformly stirring the above-mentioned material and hot asphalt liquor according to a certain mixing ratio so as to obtain the invented asphalt mixture
The fiber reinforced cement solidified body can improve the tensile strength, the bending strength and the impact toughness of the cement solidified body, reduce the formation and the expansion of cracks, show better durability under severe environments such as freeze thawing cycle, chemical erosion and the like, and can slow down the shrinkage of the cement solidified body, as the fiber can bridge micro cracks, reduce the possibility of the micro cracks developing into macro cracks, improve the crack resistance of concrete and reduce the micro cracks caused by shrinkage. The asphalt layer and the cement solidified layer are well bonded, and the bonding force is enhanced.
Example 3
The embodiment provides a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, which comprises the following steps:
S1, collecting household garbage incineration fly ash, placing the household garbage incineration fly ash in a hydrothermal reaction kettle for carrying out hydrothermal treatment, collecting chlorine generated by decomposing fly ash chloride in a hydrothermal treatment process through a closed pipeline system connected with the hydrothermal reaction kettle after the hydrothermal treatment is completed, putting a hydrothermal treatment product in the hydrothermal reaction kettle into a stirring device after the chlorine collection is completed, putting sulfoaluminate cement into the stirring device for stirring, adding a proper amount of sodium tetraphenylborate, and simultaneously adding a proper amount of water for stirring uniformly to form uniform slurry;
S2, selecting polyacrylonitrile fibers with proper length, adjusting the viscosity of the slurry to ensure that the polyacrylonitrile fibers are uniformly dispersed in the slurry, wherein proper water-gel ratio is favorable for improving the dispersibility of the polyacrylonitrile fibers in the slurry, avoiding sinking of the polyacrylonitrile fibers caused by over-dilution of the slurry, starting from a slurry with medium viscosity, then gradually adjusting according to the dispersion condition and construction requirement of the fibers, selecting fibers with proper length, wherein the fibers with too long length are possibly difficult to disperse, and the fibers with too short length are possibly incapable of providing sufficient reinforcing effect;
S3, pouring and coagulating slurry containing polyacrylonitrile fibers to obtain a cement solidified body, crushing the cement solidified body by using a jaw crusher, adding the crushed cement solidified body into asphalt concrete stirring equipment, heating styrene-butadiene rubber modified asphalt and matrix asphalt to 180 ℃ respectively, keeping the temperature range, changing the styrene-butadiene rubber modified asphalt and the matrix asphalt from semi-solid states to flowing states, adding the heated styrene-butadiene rubber modified asphalt into the asphalt concrete stirring equipment, uniformly stirring, enabling the surface of the crushed cement solidified body to be provided with a layer of styrene-butadiene rubber modified asphalt, cooling and coagulating, enabling the surface of the crushed cement solidified body to form a styrene-butadiene rubber modified asphalt layer, heating the cooled and coagulated styrene-butadiene rubber modified asphalt layer by using a heating device of the asphalt concrete stirring equipment, softening the cooled and coagulated styrene-butadiene rubber modified asphalt layer, enabling the crushed cement solidified body to be separated, continuously adding the heated matrix asphalt into the asphalt concrete stirring equipment, uniformly stirring the separated crushed cement solidified body and the heated matrix asphalt, cooling and coagulating, and uniformly stirring the separated crushed cement solidified body and the heated matrix asphalt, and uniformly cooling and solidifying the heated styrene-butadiene rubber modified asphalt to form a matrix asphalt layer on the surface of the crushed cement solidified body, and the asphalt layer, thereby obtaining the coated asphalt.
The asphalt concrete stirring equipment is specially used for drying, heating, sieving and metering sand stone material, adding proper quantity of filling material (stone powder) and uniformly stirring the above-mentioned material and hot asphalt liquor according to a certain mixing ratio so as to obtain the invented asphalt mixture
The fiber reinforced cement solidified body can improve the tensile strength, the bending strength and the impact toughness of the cement solidified body, reduce the formation and the expansion of cracks, show better durability under severe environments such as freeze thawing cycle, chemical erosion and the like, and can slow down the shrinkage of the cement solidified body, as the fiber can bridge micro cracks, reduce the possibility of the micro cracks developing into macro cracks, improve the crack resistance of concrete and reduce the micro cracks caused by shrinkage. The asphalt layer and the cement solidified layer are well bonded, and the bonding force is enhanced.
Example 4
The embodiment provides a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, which comprises the following steps:
S1, collecting household garbage incineration fly ash, placing the household garbage incineration fly ash in a hydrothermal reaction kettle for carrying out hydrothermal treatment, collecting chlorine generated by decomposing fly ash chloride in a hydrothermal treatment process through a closed pipeline system connected with the hydrothermal reaction kettle after the hydrothermal treatment is completed, putting a hydrothermal treatment product in the hydrothermal reaction kettle into a stirring device after the chlorine collection is completed, putting sulfoaluminate cement into the stirring device for stirring, adding a proper amount of sodium tetraphenylborate, and simultaneously adding a proper amount of water for stirring uniformly to form uniform slurry;
S2, selecting stainless steel fibers with proper length, adjusting the viscosity of the slurry to enable the stainless steel fibers to be uniformly dispersed in the slurry, wherein proper water-to-gel ratio is favorable for improving the dispersibility of the stainless steel fibers in the slurry, avoiding sinking of the stainless steel fibers caused by over-dilution of the slurry, starting from a slurry with medium viscosity, then gradually adjusting according to the dispersion condition and construction requirement of the fibers, selecting fibers with proper length, wherein the fibers with too long length are possibly difficult to disperse, and the fibers with too short length possibly cannot provide sufficient reinforcing effect;
And S3, pouring and coagulating the slurry containing the stainless steel fibers to obtain a cement solidified body, crushing the cement solidified body by using a jaw crusher, adding the crushed cement solidified body into asphalt concrete stirring equipment, heating the cooled and coagulated polyethylene modified asphalt layer by using a heating device of asphalt concrete stirring equipment to soften the cooled and coagulated polyethylene modified asphalt layer, keeping the temperature range to enable the polyethylene modified asphalt and the matrix asphalt to change from a semi-solid state to a flowing state, adding the heated polyethylene modified asphalt into asphalt concrete stirring equipment, uniformly stirring, enabling the surface of the crushed cement solidified body to be provided with a layer of polyethylene modified asphalt, cooling and coagulating, enabling the surface of the crushed cement solidified body to form a polyethylene modified asphalt layer, and after the polyethylene modified asphalt layer is formed, heating the cooled and coagulated polyethylene modified asphalt layer by using a heating device of asphalt concrete stirring equipment to soften the cooled and coagulated polyethylene modified asphalt layer, so that the crushed cement solidified body can be separated, continuously adding the heated matrix asphalt into the asphalt concrete stirring equipment, uniformly stirring the separated crushed cement solidified body and the heated matrix asphalt, cooling and coagulating to form a coated asphalt layer on the polyethylene modified asphalt layer.
The asphalt concrete stirring equipment is specially used for drying, heating, sieving and metering sand stone material, adding proper quantity of filling material (stone powder) and uniformly stirring the above-mentioned material and hot asphalt liquor according to a certain mixing ratio so as to obtain the invented asphalt mixture
The fiber reinforced cement solidified body can improve the tensile strength, the bending strength and the impact toughness of the cement solidified body, reduce the formation and the expansion of cracks, show better durability under severe environments such as freeze thawing cycle, chemical erosion and the like, and can slow down the shrinkage of the cement solidified body, as the fiber can bridge micro cracks, reduce the possibility of the micro cracks developing into macro cracks, improve the crack resistance of concrete and reduce the micro cracks caused by shrinkage. The asphalt layer and the cement solidified layer are well bonded, and the bonding force is enhanced.
Example 5
The embodiment provides a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, which comprises the following steps:
S1, collecting household garbage incineration fly ash, placing the household garbage incineration fly ash in a hydrothermal reaction kettle for carrying out hydrothermal treatment, collecting chlorine generated by decomposing fly ash chloride in a hydrothermal treatment process through a closed pipeline system connected with the hydrothermal reaction kettle after the hydrothermal treatment is completed, putting a hydrothermal treatment product in the hydrothermal reaction kettle into a stirring device after the chlorine collection is completed, putting sulfoaluminate cement into the stirring device for stirring, adding a proper amount of sodium tetraphenylborate, and simultaneously adding a proper amount of water for stirring uniformly to form uniform slurry;
s2, selecting copper fibers with proper length, adjusting the viscosity of the slurry to ensure that the copper fibers are uniformly dispersed in the slurry, wherein proper water-to-gel ratio is favorable for improving the dispersibility of the synthetic fibers or the copper fibers in the slurry, avoiding the copper fibers sinking caused by over-dilution of the slurry, starting from a slurry with medium viscosity, then gradually adjusting according to the dispersion condition and construction requirement of the fibers, selecting fibers with proper length, wherein the fibers with too long length are possibly difficult to disperse, and the fibers with too short length are possibly incapable of providing sufficient reinforcing effect;
S3, pouring and coagulating the slurry containing copper fibers to obtain a cement solidified body, crushing the cement solidified body by using a jaw crusher, putting the crushed cement solidified body into asphalt concrete stirring equipment, heating the styrene-butadiene-styrene block copolymer modified asphalt and the matrix asphalt to 160 ℃ respectively, keeping the temperature range, changing the styrene-butadiene-styrene block copolymer modified asphalt and the matrix asphalt from a semi-solid state to a flowing state, adding the heated styrene-butadiene-styrene block copolymer modified asphalt into asphalt concrete stirring equipment, uniformly stirring, enabling the surface of the crushed cement solidified body to be provided with a layer of styrene-butadiene-styrene block copolymer modified asphalt, cooling and solidifying, forming a styrene-butadiene-styrene block copolymer modified asphalt layer on the surface of the crushed cement solidified body, heating the cooled and solidified styrene-butadiene-styrene block copolymer modified asphalt layer by using a heating device of asphalt concrete stirring equipment, enabling the cooled and solidified styrene-butadiene-styrene block copolymer modified asphalt layer to be heated, enabling the cooled and solidified styrene block copolymer modified asphalt to be separated from each other, enabling the cooled and solidified asphalt to be separated from each other after the cement solidified by heating to form a layer of styrene-butadiene-styrene block copolymer modified asphalt, continuously stirring the asphalt concrete after the crushed cement solidified layer is formed into asphalt concrete, and the asphalt concrete is stirred, obtaining an asphalt-coated cement solidified body;
S4, after the indissolvable phosphor salt Ca (H 2PO4)2 and the biochar are mixed, the indissolvable phosphor salt Ca (H 2PO4)2 and the biochar are mixed) is embedded in the surface layer of the soil of the domestic garbage landfill, when the method is implemented, strips or grooves are formed in the soil, the indissolvable phosphor salt Ca (H 2PO4)2 and the biochar are applied and then cover the soil, the phosphate-dissolving bacteria microbial preparation is applied into the soil of the domestic garbage landfill, when the method is implemented, the microbial preparation is dissolved in water through an irrigation system, then evenly sprayed or trickled into the soil, and then the asphalt-coated cement solidified body is buried in the domestic garbage landfill.
The poorly soluble phosphorus salt may also be Ca (H 2PO4)2·CaHPO4、Ca10(PO4)6(OH)2.
Comparative example 1
The comparative example provides a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, comprising the following steps:
S1, collecting household garbage incineration fly ash, placing the household garbage incineration fly ash in a hydrothermal reaction kettle for carrying out hydrothermal treatment, collecting chlorine generated by decomposing fly ash chloride in a hydrothermal treatment process through a closed pipeline system connected with the hydrothermal reaction kettle after the hydrothermal treatment is completed, putting a hydrothermal treatment product in the hydrothermal reaction kettle into a stirring device after the chlorine collection is completed, putting sulfoaluminate cement into the stirring device for stirring, adding a proper amount of sodium tetraphenylborate, and simultaneously adding a proper amount of water for stirring uniformly to form uniform slurry;
S2, selecting polyester fibers with proper length, adjusting the viscosity of the slurry to enable the polyester fibers to be uniformly dispersed in the slurry, wherein proper water-to-gel ratio is favorable for improving the dispersibility of the polyester fibers in the slurry, avoiding sinking of the polyester fibers caused by over-dilution of the slurry, starting from a slurry with medium viscosity, then gradually adjusting according to the dispersion condition and construction requirement of the fibers, selecting fibers with proper length, wherein the fibers with too long length are possibly difficult to disperse, and the fibers with too short length possibly cannot provide sufficient reinforcing effect;
and S3, pouring and coagulating the slurry containing the polyester fibers to obtain a cement solidified body.
Comparative example 2
The comparative example provides a method for improving the long-term curing fly ash effect of a fly ash cement solidified body, comprising the following steps:
S1, collecting household garbage incineration fly ash, putting the household garbage incineration fly ash into a stirring device, putting sulfoaluminate cement into the stirring device for stirring, and simultaneously adding a proper amount of water for stirring uniformly to form uniform slurry;
S2, selecting polyester fibers with proper length, adjusting the viscosity of the slurry to enable the polyester fibers to be uniformly dispersed in the slurry, wherein proper water-to-gel ratio is favorable for improving the dispersibility of the polyester fibers in the slurry, avoiding sinking of the polyester fibers caused by over-dilution of the slurry, starting from a slurry with medium viscosity, then gradually adjusting according to the dispersion condition and construction requirement of the fibers, selecting fibers with proper length, wherein the fibers with too long length are possibly difficult to disperse, and the fibers with too short length possibly cannot provide sufficient reinforcing effect;
and S3, pouring and coagulating the slurry containing the polyester fibers to obtain a cement solidified body.
Experimental example
Artificial accelerated aging experiment of carbon dioxide incubator
The asphalt-coated cement solidified bodies provided in examples 1 to 4 and the asphalt-coated cement solidified bodies provided in comparative examples 1 to 2 were respectively placed in a carbon dioxide incubator, a 3L water tray was placed in the carbon dioxide incubator, 3L sterile pure water was filled therein, the temperature of 37 degrees was set, water was naturally evaporated to make the humidity in the incubator 95%, an air valve was adjusted to make the carbon dioxide concentration in the carbon dioxide incubator 50%, the experiment was conducted for one month, after one month, the observation form was taken out, immersed in deionized water for 3 hours, and the concentration of heavy metals in water was detected using an atomic absorption spectrometer, and the results are shown in Table 1.
The results of measuring the concentrations of heavy metal ions in the water of examples 1 to 4 and comparative examples 1 to 2 are shown in Table 1.
TABLE 1
The results in Table 1 show that the heavy metal ions in the water of examples 1-4 were not detected, and the heavy metal ion concentration in the water of comparative example 2 was significantly higher than that of comparative example 1, and the heavy metal ion concentrations in the water of comparative example 1 and comparative example 2 were significantly higher than that of examples 1-4.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.

Claims (10)

1.一种提高飞灰水泥固化体长期固化飞灰效果的方法，其特征在于，包括以下步骤：1. A method for improving the long-term solidification effect of fly ash by fly ash cement solidification body, characterized in that it comprises the following steps: S1、收集生活垃圾焚烧飞灰，将所述生活垃圾焚烧飞灰置于水热反应釜中先进行水热处理，水热处理完成后，通过与所述水热反应釜相连的封闭管道系统飞灰氯化物在水热处理过程中分解产生的氯气进行收集，氯气收集完成后，将所述水热反应釜中的水热处理产物投入到搅拌装置中，将水泥投入到所述搅拌装置中进行搅拌，同时加入的水搅拌均匀，形成均匀的浆料；S1. Collect fly ash from incineration of domestic waste, place the fly ash in a hydrothermal reactor for hydrothermal treatment, and after the hydrothermal treatment, collect chlorine generated by decomposition of fly ash chloride during the hydrothermal treatment through a closed pipeline system connected to the hydrothermal reactor. After the chlorine is collected, put the hydrothermal treatment product in the hydrothermal reactor into a stirring device, put cement into the stirring device for stirring, and stir the added water evenly to form a uniform slurry; S2、选择适当长度的合成纤维或金属纤维，调整所述浆料的粘度，使合成纤维或金属纤维在所述浆料中均匀分散，往调整粘度的浆料中逐渐加入所述合成纤维或金属纤维，先使用低速搅拌开始混合，以避免对合成纤维或金属纤维造成损伤，并逐步提高搅拌速度，使所述合成纤维或金属纤维在所述浆料中分散均匀，得到包含合成纤维或金属纤维的浆料；S2, selecting synthetic fibers or metal fibers of appropriate length, adjusting the viscosity of the slurry so that the synthetic fibers or metal fibers are evenly dispersed in the slurry, gradually adding the synthetic fibers or metal fibers to the slurry with adjusted viscosity, first stirring at a low speed to start mixing to avoid damaging the synthetic fibers or metal fibers, and gradually increasing the stirring speed so that the synthetic fibers or metal fibers are evenly dispersed in the slurry, thereby obtaining a slurry containing synthetic fibers or metal fibers; S3、将所述包含合成纤维或金属纤维的浆料进行浇筑凝结后，得到水泥固化体，使用颚式破碎机粉碎所述水泥固化体，粉碎后的水泥固化体投入到沥青混凝土搅拌设备中；将聚合物改性沥青和基质沥青分别加热到160℃-185℃，保持在该温度范围，加热过的聚合物改性沥青加入到所述沥青混凝土搅拌设备中，搅拌均匀，使所述粉碎后的水泥固化体的表面带有一层所述聚合物改性沥青，冷却凝固，所述粉碎后的水泥固化体的表面形成聚合物改性沥青层，形成所述聚合物改性沥青层后，使用所述沥青混凝土搅拌设备的加热装置对冷却凝固的聚合物改性沥青层进行加热，使所述冷却凝固的聚合物改性沥青层软化，以致使所述粉碎后的水泥固化体能够分开，继续将所述加热过的基质沥青加入到所述沥青混凝土搅拌设备中，将分开的粉碎后的水泥固化体和所述加热过的基质沥青搅拌均匀，冷却凝固后在所述聚合物改性沥青层上形成基质沥青层，得到沥青包覆的水泥固化体。S3. After pouring and solidifying the slurry containing synthetic fibers or metal fibers, a cement solidified body is obtained, and the cement solidified body is crushed by a jaw crusher, and the crushed cement solidified body is put into an asphalt concrete mixing device; the polymer modified asphalt and the base asphalt are heated to 160°C-185°C respectively, and maintained in this temperature range, and the heated polymer modified asphalt is added to the asphalt concrete mixing device and stirred evenly so that the surface of the crushed cement solidified body is provided with a layer of the polymer modified asphalt, and cooled and solidified to form a polymer modified asphalt layer on the surface of the crushed cement solidified body. After the polymer modified asphalt layer is formed, the cooled and solidified polymer modified asphalt layer is heated by a heating device of the asphalt concrete mixing device to soften the cooled and solidified polymer modified asphalt layer so that the crushed cement solidified body can be separated, and the heated base asphalt is continuously added to the asphalt concrete mixing device, and the separated crushed cement solidified body and the heated base asphalt are stirred evenly, and after cooling and solidification, a base asphalt layer is formed on the polymer modified asphalt layer to obtain an asphalt-coated cement solidified body. 2.如权利要求1所述的一种提高飞灰水泥固化体长期固化飞灰效果的方法，其特征在于，步骤S2中，采用强制式搅拌机搅拌所述合成纤维或金属纤维。2. A method for improving the long-term solidification effect of fly ash cement solidified body according to claim 1, characterized in that in step S2, a forced mixer is used to stir the synthetic fiber or metal fiber. 3.如权利要求1所述的一种提高飞灰水泥固化体长期固化飞灰效果的方法，其特征在于，步骤S1中，在所述搅拌装置中，所述飞灰、所述水泥及水投加的重量比为1：0.2：3。3. A method for improving the long-term solidification effect of fly ash by fly ash cement solidification body according to claim 1, characterized in that, in step S1, in the stirring device, the weight ratio of the fly ash, the cement and the water is 1:0.2:3. 4.如权利要求2所述的一种提高飞灰水泥固化体长期固化飞灰效果的方法，其特征在于，步骤S2中，所述合成纤维为聚酯纤维、聚酰胺纤维、聚丙烯腈纤维、聚乙烯醇缩甲醛纤维、聚氯乙烯纤维、聚氨酯弹性纤维中的一种；所述金属纤维为不锈钢纤维、铜纤维、镍纤维、铝纤维中的一种。4. A method for improving the long-term solidification effect of fly ash cement solidified body as described in claim 2, characterized in that in step S2, the synthetic fiber is one of polyester fiber, polyamide fiber, polyacrylonitrile fiber, polyvinyl formal fiber, polyvinyl chloride fiber, and polyurethane elastic fiber; the metal fiber is one of stainless steel fiber, copper fiber, nickel fiber, and aluminum fiber. 5.如权利要求1所述的一种提高飞灰水泥固化体长期固化飞灰效果的方法，其特征在于，步骤S1中，所述水泥为硫铝酸盐水泥。5. The method for improving the long-term solidification effect of fly ash by fly ash cement solidification body according to claim 1, characterized in that in step S1, the cement is sulphoaluminate cement. 6.如权利要求1所述的一种提高飞灰水泥固化体长期固化飞灰效果的方法的，其特征在于，步骤S3中，所述颚式破碎机为简摆颚式破碎机、复摆颚式破碎机或液压颚式破碎机中的一种。6. The method for improving the long-term solidification effect of fly ash cement solidified body according to claim 1, characterized in that in step S3, the jaw crusher is one of a simple swing jaw crusher, a compound swing jaw crusher or a hydraulic jaw crusher. 7.如权利要求1所述的一种提高飞灰水泥固化体长期固化飞灰效果的方法，其特征在于，步骤S3中，所述聚合物改性沥青由所述基质沥青通过以下聚合物中的一种改性而得到的：苯乙烯-丁二烯-苯乙烯嵌段共聚物、丁苯橡胶、乙烯-醋酸乙烯共聚物、聚乙烯、聚氨酯。7. A method for improving the long-term solidification effect of fly ash cement solidified body as described in claim 1, characterized in that in step S3, the polymer modified asphalt is obtained by modifying the base asphalt through one of the following polymers: styrene-butadiene-styrene block copolymer, styrene-butadiene rubber, ethylene-vinyl acetate copolymer, polyethylene, and polyurethane. 8.如权利要求1所述的一种提高飞灰水泥固化体长期固化飞灰效果的方法，其特征在于，步骤S1中，将所述水泥投入到所述搅拌装置中进行搅拌，同时加入的水搅拌均匀，在该步骤中还加入的四苯硼钠，搅拌均匀。8. A method for improving the long-term solidification effect of fly ash cement solidified body according to claim 1, characterized in that, in step S1, the cement is put into the stirring device for stirring, and the added water is stirred evenly, and sodium tetraphenylborate is also added in this step and stirred evenly. 9.如权利要求1所述的一种提高飞灰水泥固化体长期固化飞灰效果的方法，其特征在于，步骤S3得到所述沥青包覆的水泥固化体后，将难溶性磷盐和生物碳混合后，在所述生活垃圾填埋场的土壤的表层埋植所述难溶性磷盐和所述生物炭的混合物，将解磷菌微生物制剂施入所述生活垃圾填埋场的土壤中，然后再将所述沥青包覆的水泥固化体填埋在所述生活垃圾填埋场中。9. A method for improving the long-term solidification effect of fly ash by fly ash cement solidified body as described in claim 1, characterized in that after obtaining the asphalt-coated cement solidified body in step S3, the insoluble phosphate salt and biochar are mixed, and the mixture of the insoluble phosphate salt and the biochar is buried in the surface layer of the soil in the domestic waste landfill, a phosphate-solubilizing bacteria microbial preparation is applied to the soil of the domestic waste landfill, and then the asphalt-coated cement solidified body is buried in the domestic waste landfill. 10.如权利要求9所述的一种提高飞灰水泥固化体长期固化飞灰效果的方法，其特征在于，所述难溶性磷盐为Ca(H2PO4)2、Ca(H2PO4)2·CaHPO4、Ca10(PO4)6(OH)2中的一种。10. A method for improving the long-term solidification effect of fly ash cement solidified body according to claim 9, characterized in that the sparingly soluble phosphate salt is one of Ca( H2PO4 ) 2 , Ca ( H2PO4 ) 2 · CaHPO4 , and Ca10 ( PO4 ) 6 (OH) 2 .
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JPH09239340A (en) * 1996-03-06 1997-09-16 Kanegafuchi Chem Ind Co Ltd Waste treating material and waste treating method
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CN105964652A (en) * 2016-05-10 2016-09-28 苏州大学 Curing and stabilizing treatment method for garbage incineration fly ash
CN110924302A (en) * 2019-05-09 2020-03-27 江苏交通工程咨询监理有限公司 SMA modified asphalt concrete bridge deck pavement based on improved coarse aggregate stone interface
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CN117658531A (en) * 2024-01-29 2024-03-08 常熟理工学院 A method for co-processing waste incineration fly ash and waste asphalt and preparing hydrophobic solid bricks

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