CN113548819B - Modified asphalt mastic based on oil sludge pyrolysis residues and preparation method thereof - Google Patents
Modified asphalt mastic based on oil sludge pyrolysis residues and preparation method thereof Download PDFInfo
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- CN113548819B CN113548819B CN202110402515.4A CN202110402515A CN113548819B CN 113548819 B CN113548819 B CN 113548819B CN 202110402515 A CN202110402515 A CN 202110402515A CN 113548819 B CN113548819 B CN 113548819B
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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
- 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
- C04B20/023—Chemical treatment
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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
- 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
- C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
- C04B18/049—Wastes from oil or other wells, e.g. drilling mud
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to modified asphalt cement based on oil sludge pyrolysis residues and a preparation method thereof, wherein the method comprises the following steps: mixing the oil sludge pyrolysis residue with a preset substance in a dry state to prepare a filler; adding water into the filler to prepare viscous fluid; standing the viscous fluid for a preset time to prepare a mixture; drying the mixture to prepare a mixed filler; and preparing the mixed filler into modified asphalt cement. The modified asphalt mucilage prepared by the invention is residue after mineral powder composite modification, and the high-temperature performance of the modified asphalt mucilage is obviously superior to that of the mineral powder asphalt mucilage. The low-temperature performance of the modified oil sludge pyrolysis residue is obviously superior to that of the mineral powder asphalt mucilage. The oil sludge pyrolysis residue replaces part of mineral powder, and various performances of the modified oil sludge pyrolysis residue are obviously superior to those of mineral powder asphalt mucilage after slaked lime modification, so that the problems of insufficient high-temperature performance and water stability of the modified oil sludge pyrolysis residue are solved, and the modified oil sludge asphalt mucilage has good road performance.
Description
Technical Field
The invention belongs to the technical field of road engineering pavement cementing materials, and relates to modified asphalt cement based on oil sludge pyrolysis residues and a preparation method thereof.
Background
With the increasing demand of China for petroleum resources, the exploitation scale is promoted to be enlarged continuously, and more than 400 oil and gas fields are developed only at present. However, along with the inevitable production of oil sludge in the oil exploitation, exploration and transportation processes, according to incomplete statistics, the annual output of oil sludge in China is about 9.0 × 10 5 Ton. And the oil sludge has complex components, contains not only oil content and a large amount of recyclable resources such as heavy metals, but also toxic substances such as benzene series, phenols, anthracene, pyrene and the like, and causes serious pollution problems to the surrounding environment. Therefore, the disposal and resource utilization of oil sludge become problems which need to be solved in the petrochemical industry at present.
Because of the complex components of the oil sludge, the direct application of the oil sludge has adverse effects on the environment, operators and the like, and the oil in the oil sludge cannot be recycled. Based on this, pyrolysis is mostly used to perform reduction, harmless and recycling treatment on the oil sludge at present. On one hand, the pyrolysis method has the advantages of thorough treatment, little pollution, capability of recovering oil in the oil sludge, solidified heavy metals and the like. On the other hand, the pyrolysis residue of the oil sludge after the pyrolysis treatment of the oil sludge mainly contains ash and carbon, and the ash contains a large amount of substances such as oxides, sulfates, carbonates, and the like. The components of the road material are similar to those of building materials, and the road material can effectively improve the utilization rate of the oil sludge when being used as a road material.
At present, the modified asphalt is added with modifiers such as rubber, resin, high molecular polymer and other fillers, or measures such as mild oxidation processing of the asphalt are taken, so that the performance of the asphalt is improved, and the prepared asphalt cement material is prepared. However, modifiers such as rubber generate pungent odor in the heating and mixing process, and most of the used modifiers come from industrial chemical products, so that the construction cost is increased.
Therefore, it is an urgent problem to provide a method for effectively treating the pyrolysis residue of the oil sludge and making the pyrolysis residue of the oil sludge fully utilized.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides modified asphalt cement based on oil sludge pyrolysis residues and a preparation method thereof. The technical problem to be solved by the invention is realized by the following technical scheme:
the embodiment of the invention provides modified asphalt cement based on pyrolysis residues of oil sludge and a preparation method thereof, wherein the preparation method comprises the following steps:
mixing oil sludge pyrolysis residues with a preset substance in a dry state to prepare a filler, wherein the preset substance comprises hydrated lime;
adding water into the filler to prepare viscous fluid;
standing the viscous fluid for a preset time to prepare a mixture;
drying the mixture to prepare a mixed filler;
and preparing the mixed filler into modified asphalt cement.
In one embodiment of the present invention, the predetermined substances further include a silane coupling agent and a mineral powder.
In one embodiment of the present invention, the oil sludge pyrolysis residue is sufficiently mixed with a predetermined substance in a dry state to prepare a filler, comprising:
firstly, adding the silane coupling agent into water, stirring, and then mixing the silane coupling agent added with water, the oil sludge pyrolysis residue, the slaked lime and the mineral powder in a dry state to prepare a filler.
In one embodiment of the present invention, the viscous fluid is left to stand for a predetermined time to prepare a mixture, including:
and standing the viscous fluid for a preset time to react the oil sludge pyrolysis residue with the slaked lime to prepare a mixture.
In one embodiment of the invention, the preset time is more than 0.5h.
In one embodiment of the invention, the mixture is subjected to a drying process to prepare a hybrid filler comprising:
the mixture was put into an oven for drying treatment to prepare a mixed filler.
In one embodiment of the present invention, the mixed filler is prepared into a modified asphalt cement comprising:
firstly, grinding the mixed filler, adding the ground mixed filler into the rubber cement, and then preparing the rubber cement added with the mixed filler into the modified asphalt rubber cement by using a high-speed shear rheometer under the condition of a preset temperature.
In one embodiment of the invention, the powder-to-rubber ratio of the modified asphalt cement is 0.8-1.0.
In one embodiment of the present invention, the preset temperature ranges from 140 ℃ to 160 ℃.
According to another embodiment of the invention, the modified asphalt mastic based on the pyrolysis residue of the oil sludge is prepared by the preparation method in any one of the above embodiments.
Compared with the prior art, the invention has the beneficial effects that:
the modified asphalt mucilage prepared by the invention is residue after mineral powder composite modification, and the high-temperature performance of the modified asphalt mucilage is obviously superior to that of mineral powder asphalt mucilage. The low-temperature performance of the modified oil sludge pyrolysis residue is obviously superior to that of the mineral powder asphalt mucilage. The oil sludge pyrolysis residue replaces part of mineral powder, and various performances of the modified oil sludge pyrolysis residue are obviously superior to those of mineral powder asphalt mucilage after slaked lime modification, so that the problems of insufficient high-temperature performance and water stability of the modified oil sludge pyrolysis residue are solved, and the modified oil sludge asphalt mucilage has good road performance.
Other aspects and features of the present invention will become apparent from the following detailed description, which proceeds with reference to the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims. It should be further understood that the drawings are not necessarily drawn to scale and that, unless otherwise indicated, they are merely intended to conceptually illustrate the structures and procedures described herein.
Drawings
Fig. 1 is a schematic flow diagram of a preparation method of a modified asphalt mastic based on oil sludge pyrolysis residues, provided by an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for preparing a modified asphalt cement based on pyrolysis residues of oil sludge according to an embodiment of the present invention. The invention provides a preparation method of modified asphalt mucilage based on oil sludge pyrolysis residues, which comprises the following steps:
step 1, mixing oil sludge pyrolysis residues with a preset substance in a dry state to prepare a filler, wherein the preset substance comprises slaked lime;
step 2, adding water into the filler to prepare viscous fluid;
step 3, standing the viscous fluid for a preset time to prepare a mixture;
step 4, drying the mixture to prepare a mixed filler;
and 5, preparing the mixed filler into modified asphalt cement.
In this embodiment, the oil sludge pyrolysis residue and the slaked lime may be directly mixed in a dry state to prepare the filler, and other substances may also be added, that is, the preset substance further includes a silane coupling agent and mineral powder, and when the preset substance further includes the silane coupling agent and the mineral powder in addition to the slaked lime, the specific steps of step 1 include:
firstly, adding a silane coupling agent into water, stirring, and then mixing the silane coupling agent added with the water, the oil sludge pyrolysis residue, the slaked lime and the mineral powder in a dry state to prepare the filler.
In one embodiment, the standing of the viscous fluid for a predetermined time to prepare a mixture comprises:
the viscous fluid is left to stand for a predetermined time to react the oil sludge pyrolysis residue with slaked lime to prepare a mixture.
Further, the preset time is more than 0.5h.
In one embodiment, the mixture is subjected to a drying process to produce a hybrid filler comprising:
the mixture was put into an oven to be dried to prepare a mixed filler.
In one embodiment, the mixed filler is prepared into a modified asphalt cement comprising:
firstly grinding the mixed filler, adding the ground mixed filler into the rubber cement, and then preparing the rubber cement added with the mixed filler into the modified asphalt rubber cement by using a high-speed shear rheometer under the condition of a preset temperature.
Furthermore, the powder-to-rubber ratio of the modified asphalt cement is 0.8-1.0, wherein the powder-to-rubber ratio is the ratio of the mixed filler to the cement.
Further, the preset temperature range is 140 ℃ to 160 ℃.
Based on the above problems, the modified asphalt cement prepared by the preparation method of the embodiment specifically solves the technical problems that: 1. how to improve the adhesion of asphalt based on the physicochemical properties of the pyrolysis residue of the oil sludge so as to obviously improve the pavement performance of asphalt cement 2. How to recycle the waste and combine the waste with the resource conservation: the oil sludge pyrolysis residue not only pollutes the environment, but also is a great problem in disposal, and the embodiment uses the oil sludge pyrolysis residue to replace mineral powder in the asphalt mixture, so that the problems are partially solved, and the use of the mineral powder is reduced, thereby not only utilizing wastes, but also saving resources.
The components of this example function:
pyrolysis residue of oil sludge: 1. the microstructure of the oil sludge pyrolysis residue enables the oil sludge pyrolysis residue to have excellent liquid phase diffusivity, and form a good infiltration effect with asphalt, thereby creating good conditions for the oil sludge pyrolysis residue to selectively adsorb the asphalt, and being beneficial to the absorption of the oil sludge pyrolysis residue on organic macromolecules. The carbon in the pyrolysis residue of the oil sludge has developed pore characteristics, the contact area with the asphalt can be increased, the heavy metal in the residue can react with the functional group in the asphalt to form a stable complex, and the adhesion of the asphalt mucilage is improved. 2. The oil sludge pyrolysis residue contains organic matters and inorganic compounds with different types, part of organic components are similar to part of components in asphalt, and the components of the inorganic compounds are similar to those of mineral powder, so that a foundation is provided for the combination of the oil sludge pyrolysis residue and the asphalt. 3. The oil sludge pyrolysis residue belongs to an alkaline material and can react with carboxylic acid (-COOH) in asphalt to generate macromolecular carboxylate which is insoluble in water and soluble in hydrocarbon and oil. Thus reducing the water sensitivity of the asphalt cement. 4. Besides the physical adsorption effect of Van der Waals force between the oil sludge pyrolysis residues and the asphalt, the strong chemical adsorption effect exists between the oil sludge pyrolysis residues and the asphalt. Zn contained in oil sludge pyrolysis residue 2+ 、Cr 6+ 、Cu 2+ The heavy metal ions can perform a complex reaction with functional groups with strong polarity in the asphalt to generate a stable coordination complex, so that the heavy metal in the pyrolysis residue can be well solidified, the oil sludge pyrolysis residue can form a strong chemical adsorption effect with the asphalt, and the low-temperature performance of the asphalt mucilage is improved.
Silane coupling agent: the siloxy groups in the silane coupling agent are reactive with inorganic substances, and the organic functional groups are reactive or compatible with organic substances. Thus, when a silane coupling agent intervenes between the inorganic and organic interfaces, a bonding layer of organic matrix-silane coupling agent-inorganic matrix may be formed. The adhesive force of harmful impurities in asphalt and oil sludge pyrolysis residues is enhanced.
Slaking lime: 1. calcium ions in the slaked lime can perform ion exchange reaction with clay particles in the pyrolysis residue, and the clay particles in the pyrolysis residue can be separated out in the form of hydrous calcium silicate and calcium aluminate taking the calcium ions as cores to form stable calcium salt particles. The distance between clay particles is reduced, the van der Waals force between the particles is increased, calcium ions can react with carboxyl with strong polarity in asphalt to form calcium salt which is insoluble in water and soluble in an organic solvent, and the influence of harmful substances in oil sludge pyrolysis residues on the adhesion performance of asphalt mucilage and the like is avoided. 2. After the slaked lime is dissolved in water, the slaked lime is alkaline, and more hydroxide ions play a certain activation role in pyrolysis residues, so that the porosity of the oil sludge pyrolysis residues can be increased, and macromolecules in the asphalt enter pores along capillary tubes on the surface of the oil sludge pyrolysis residues to form a good anchoring effect. The contact area with asphalt is increased, so that the surrounding folds of the asphalt mortar filler of the oil sludge pyrolysis residue after slaked lime modification are obvious, and the high and low temperature performance of the asphalt mortar is improved.
Mineral powder: 1. the mineral powder and the asphalt form asphalt mucilage together, so that the strength and the stability of the asphalt concrete are improved, and 2, the mineral powder can play a role in hindering oxygen molecule diffusion in an asphalt medium and weakening the degree of asphalt oxidation; meanwhile, part of the maltenes are adsorbed into micropores of the mineral powder, so that the mass fraction of the maltenes in the asphalt is reduced, and the aging degree is reduced.
Water: the components can fully react in the aqueous solution under the mixing state.
The high-temperature performance of the modified asphalt mucilage prepared by the invention is obviously better than that of the residue after the mineral powder composite modification, and the modified asphalt mucilage has more obvious modification effect compared with the mineral powder-free composite modification. The low-temperature performance of the modified oil sludge pyrolysis residue is obviously superior to that of the mineral powder asphalt mucilage. After replacing part of mineral powder with the oil sludge pyrolysis residue, the oil sludge pyrolysis residue is modified by a silane coupling agent and slaked lime, and the performances of the modified oil sludge pyrolysis residue are obviously superior to those of mineral powder asphalt mucilage, so that the problems of insufficient high-temperature performance and water stability in the case of single modification by using the oil sludge pyrolysis residue are solved, and the modified oil sludge pyrolysis residue has good road performance.
Example two
The embodiment provides a specific preparation method of modified asphalt cement based on pyrolysis residue of oil sludge on the basis of the above embodiments, and it is assumed that the optimal mixture ratio is oil sludge pyrolysis residue: slaked lime =9:1, when the mass of a filler needing to be prepared into asphalt mortar is 600 g, the mass of the oil sludge pyrolysis residue is 540 g, and the mass of slaked lime is 60 g, the preparation method comprises the following steps:
step 1, 540 g of oil sludge pyrolysis residue and 60 g of slaked lime are fully mixed in a dry state to prepare the filler.
And 2, adding water into the filler prepared in the step 1 to prepare viscous fluid.
And 3, standing the viscous fluid for 2 hours to enable the oil sludge pyrolysis residue to fully react with slaked lime to prepare a mixture.
And 4, putting the mixture into an oven to be fully dried to prepare the mixed filler.
And 5, grinding the dried mixed fillers in the mixing ratio, and respectively preparing asphalt mucilages with different powder-to-glue ratios by using a high-speed shear rheometer at the temperature of 150 ℃.
EXAMPLE III
In this embodiment, a specific method for preparing a modified asphalt mastic based on pyrolysis residue of oil sludge is provided on the basis of the above embodiments, where: silane coupling agent, slaked lime, mineral powder =120, and the following components in percentage by weight are assumed to be the following optimal mixture ratio: the preparation method comprises the following steps of (1) preparing an asphalt mucilage by using a silane coupling agent, namely hydrated lime, mineral powder =120, wherein when the mass of a filler for preparing the asphalt mucilage is 1000 g, the mass of the oil sludge pyrolysis residue is 542.99 g, the mass of the silane coupling agent is 4.52 g, the mass of the hydrated lime is 90.50 g, and the mass of the mineral powder is 361.99 g:
step 1, adding 4.52 g of silane coupling agent into water, fully stirring, then adding the silane coupling agent in the water, 542.99 g of oil sludge pyrolysis residue, 90.50 g of slaked lime and 361.99 g of mineral powder, and fully mixing in a dry state to prepare the filler.
And 2, adding water into the filler prepared in the step 1 to prepare viscous fluid.
And 3, standing the viscous fluid for 2 hours to ensure that the oil sludge pyrolysis residue and the slaked lime fully react to prepare a mixture.
And 4, putting the mixture into an oven to be fully dried to prepare the mixed filler.
And 5, grinding the dried mixed fillers in each mixing ratio, and respectively preparing asphalt mucilage with different powder-to-glue ratios by using a high-speed shear rheometer at the temperature of 150 ℃.
The invention provides a modified asphalt mastic based on oil sludge pyrolysis residues, which is prepared by the preparation method of any one of the embodiments.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic data point described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the invention, which shall be deemed to belong to the scope of the invention.
Claims (9)
1. A preparation method of modified asphalt cement based on pyrolysis residues of oil sludge is characterized by comprising the following steps:
mixing oil sludge pyrolysis residues with a preset substance in a dry state to prepare a filler, wherein the preset substance comprises hydrated lime;
adding water into the filler to prepare viscous fluid;
standing the viscous fluid for a preset time to prepare a mixture;
drying the mixture to prepare a mixed filler;
preparing the mixed filler into modified asphalt cement;
the preset substance also comprises a silane coupling agent and mineral powder.
2. The method for preparing the modified asphalt cement based on the pyrolysis residue of the oil sludge as claimed in claim 1, wherein the oil sludge pyrolysis residue is fully mixed with a preset substance in a dry state to prepare a filler, comprising:
firstly, adding the silane coupling agent into water, stirring, and then mixing the silane coupling agent added with water, the oil sludge pyrolysis residue, the slaked lime and the mineral powder in a dry state to prepare a filler.
3. The method for preparing the modified asphalt mastic based on the pyrolysis residue of the oil sludge according to claim 1, wherein the standing of the viscous fluid for a predetermined time to prepare a mixture comprises:
and standing the viscous fluid for a preset time to react the oil sludge pyrolysis residue with the slaked lime to prepare a mixture.
4. The method for preparing modified asphalt mastic based on pyrolysis residues of oil sludge according to claim 3, wherein the predetermined time is greater than 0.5h.
5. The method for preparing the modified asphalt mastic based on the pyrolysis residue of the oil sludge according to claim 1, wherein the mixture is subjected to a drying process to prepare a mixed filler, comprising:
the mixture was put into an oven for drying treatment to prepare a mixed filler.
6. The method for preparing modified asphalt mastic based on pyrolysis residue of oil sludge according to claim 1, wherein the mixed filler is prepared into modified asphalt mastic comprising:
firstly, grinding the mixed filler, adding the ground mixed filler into the rubber cement, and then preparing the rubber cement added with the mixed filler into the modified asphalt rubber cement by using a high-speed shear rheometer under the condition of a preset temperature.
7. The method for preparing modified asphalt mastic based on pyrolysis residues of oily sludge according to claim 6, wherein the powder-to-cement ratio of the modified asphalt mastic is 0.8 to 1.0.
8. The method for preparing modified asphalt mastic based on pyrolysis residues of oil sludge according to claim 6, wherein the preset temperature is in the range of 140 ℃ to 160 ℃.
9. Modified asphalt mastic based on pyrolysis residues of oily sludge, characterized in that it is prepared by the preparation method according to any one of claims 1 to 8.
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