CN113998923B - Asphalt concrete prefabricated part based on solid waste material and preparation method thereof - Google Patents
Asphalt concrete prefabricated part based on solid waste material and preparation method thereof Download PDFInfo
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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
- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/001—Waste organic materials
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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
- C04B28/04—Portland cements
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0003—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of electric or wave energy or particle radiation
- C04B40/001—Electromagnetic waves
- C04B40/0014—Microwaves
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
- C04B41/5079—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
- C04B41/68—Silicic acid; Silicates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
Abstract
The invention belongs to the field of recycling of renewable resources (road engineering), and particularly relates to an asphalt concrete prefabricated part based on a solid waste material and a preparation method thereof. According to the invention, the waste pavement reclaimed materials and the waste plastic powder are mixed according to a certain proportion, and then the asphalt concrete prefabricated component is prepared by microwave heating, so that the hundred-percent utilization of the pavement milling materials is realized, the waste fine materials with high asphalt content are fully utilized, the consumption of new asphalt is saved, and the production cost is greatly reduced; adopt microwave heating's mode, compare traditional heating methods, the mixture rate of heating is fast, has reduced the secondary ageing of new and old pitch, and adopts microwave heating methods can improve the softening and the melting effect after waste plastic powder is heated, and the heating homogeneity is good, avoids waste material because of being heated inequality influence solidification effect. The emulsified asphalt slurry seal mixture is used for carrying out surface treatment on the prefabricated part, so that the water resistance and the erosion resistance of the prefabricated part can be improved, and the mechanical property of the prefabricated part is improved.
Description
Technical Field
The invention belongs to the field of recycling of renewable resources (road engineering), and particularly relates to an asphalt concrete prefabricated part based on a solid waste material and a preparation method thereof.
Background
The traffic transportation industry is the leading officer of national economy development, and the highway is an important component of the traffic industry, and the development is rapid in recent years. By 4 months in 2021, china has built the largest worldwide expressway network, the total mileage of the expressway reaches 16 kilometers, and the expressway network is stable in the first place in the world. The asphalt pavement has the advantages of smooth surface, good comfort, strong durability, convenient maintenance and the like, and is most widely applied to the construction of expressways in China. Because the highway built in the early stage is used for a long time, a large amount of ruts, cracks and other diseases are generated on part of asphalt pavements, the driving safety is seriously damaged, and the abandoned pavements need to be maintained. According to statistics, the amount of waste asphalt pavement materials generated in road maintenance engineering in China each year is more than 1.5 hundred million tons, which not only causes resource waste, but also causes environmental pollution.
However, the use of large amounts of RAP material in reclaimed asphalt mixes is a major challenge at present. At present, the recycling rate of RAP materials in China is low and is only less than 30%, and fine aggregates with high asphalt content are basically not used. Therefore, the deep research on the recycling technology of the waste milling materials and the improvement of the utilization rate of the waste milling materials become new challenges to be faced by the transportation industry in China.
The plastic products have very important and irreplaceable functions in daily life and industrial production, and thus have wide application in production and life. However, white contamination is becoming more serious as plastics are increasingly used.The main measures for treating the white pollution are burying and stacking, centralized burning and recycling. The waste plastics are buried and stacked, and firstly, more and more scarce land resources are occupied; secondly, the harmful substances are buried underground for a long time, which causes secondary pollution to the environment. The other measure is incineration, and the method has the advantages that firstly, the requirement on the incinerator is high, and secondly, a large amount of CO is generated in the incineration process 2 The global warming effect is increased, and harmful gases and substances such as polycyclic aromatic hydrocarbon compounds, CO, HCN and the like are generated to pollute the atmosphere. Although the toxic and harmful gases can be treated by special techniques, the process is complicated, the cost is too high, and economic benefits are irrevocable. The method comprehensively considers the economic benefit and reduces the influence on the environment, recycles the waste plastics and utilizes the recycled plastics according to the characteristics of the waste plastics, and is the most reasonable and effective method at present.
Disclosure of Invention
In order to solve the problems of low utilization rate of the pavement milling material and basic coarse aggregate in the prior art, the invention provides an asphalt concrete prefabricated component based on solid waste material and a preparation method thereof, the invention realizes hundred percent utilization of RAP material, fully utilizes the recycled fine material with relatively high asphalt content, saves the addition of new asphalt in the preparation process and greatly reduces the cost; the waste plastic powder is added and a microwave heating mode is adopted, so that the curing effect of the thermoplastic material can be fully utilized, the strength of the prefabricated part is improved, and a large amount of waste plastic can be utilized to reduce white pollution.
In order to achieve the purpose, the invention adopts the following technical scheme:
the asphalt concrete prefabricated part based on the solid waste material is characterized by comprising a prefabricated part, wherein an emulsified asphalt slurry seal layer is arranged on the surface of the prefabricated part; the prefabricated part comprises the following components: milling materials, emulsified asphalt and waste plastic powder; the emulsified asphalt slurry seal comprises the following components: milling material, cement, emulsified asphalt and water.
Preferably, the prefabricated part comprises the following components in parts by weight: 100 portions of milling material, 1.5 to 4.5 portions of emulsified asphalt and 3.5 to 8.5 portions of waste plastic powder.
Preferably, the emulsified asphalt slurry seal coat comprises the following components in parts by weight: 98.5 parts of milling material, 1.5 parts of cement, 2.5-4.5 parts of emulsified asphalt and 0.5-3.5 parts of water. The slurry seal of the emulsified asphalt adopts stone chips or sand with certain gradation, fillers (cement, lime, fly ash, stone powder and the like), polymer modified emulsified asphalt, an external additive and water which are mixed according to a certain proportion to form a slurry emulsified asphalt mixture which is uniformly sprayed on the surface of a prefabricated part.
Preferably, the milling material is a road surface regeneration material mixed milling material, and comprises any one or more of AC, SMA, OGFC, ATB, AM, ATPB and LSPM. The pavement milling and planing materials with different particle sizes are fine aggregates with sieve openings of less than 4.75mm, and are graded into grades of 0-3mm and 3-5mm.
Preferably, the pavement milling material is not limited to below 4.75mm, but also can be used for coarse aggregate with the particle size of less than 31.5mm, and the maximum nominal particle size of the aggregate is less than 1/3 of the thickness of the prefabricated part.
Preferably, the milling material for the prefabricated part comprises: 40-55 parts of milling material with the diameter of 0-3 mm and 45-60 parts of milling material with the diameter of 3-5 mm.
Preferably, the milling material for the protective layer comprises: 55-65 parts of milling material with the diameter of 0-3 mm and 55-65 parts of milling material with the diameter of 3-5 mm.
Preferably, the emulsified asphalt is an oil-in-water emulsion prepared by heating the road petroleum asphalt to a molten state and dispersing the asphalt in an aqueous solution containing the SBS latex and the auxiliary agent in the form of fine particles under the action of mechanical stirring. The asphalt is not limited to emulsified asphalt, heavy-duty petroleum asphalt, SBS modified asphalt, rubber modified asphalt and the like.
Preferably, the waste plastic powder is powder obtained by grinding one or a mixture of polyethylene and polypropylene plastics, and the specification is 30-50 meshes.
Preferably, the cement is ordinary portland cement.
An asphalt concrete prefabricated part based on solid waste materials and a preparation method thereof comprise the following operation steps:
1) Milling the waste pavement, and sieving the waste pavement by a 4.75mm sieve to obtain a milling material with the particle size of less than 4.75 mm; crushing and grinding the waste plastics to obtain waste plastic powder;
2) Screening fine materials with the size of below 4.75mm by a screen with the size of 2.36mm, dividing the fine materials into two grades of 0-3mm and 3-5mm, and carrying out grading design;
3) Mixing the milling materials of 0 to 3mm and 3 to 5mm in the step 2) according to a ratio, keeping the temperature in an oven of 40 to 50 ℃ for 1h, pouring the mixture into a mixing pot after the temperature is kept, adding a certain proportion of emulsified asphalt, mixing for a period, then adding a certain amount of waste plastic powder, and continuing mixing for a period to obtain an asphalt mixture;
4) Microwave heating is carried out on the mixed mixture obtained in the step 3), the temperature is raised to 160 ℃, heat preservation is carried out for 30s, then a prefabricated part (not limited to paving bricks, kerbs and asphalt shingles) is prepared in a static pressure forming mode, a test mold of the prefabricated part is a steel mold, and the pressure intensity during static pressure forming is 50MPa;
5) And (3) performing surface treatment on the prefabricated part prepared in the step 4), and uniformly spreading the prepared emulsified asphalt slurry seal mixture on the surface of the prefabricated part.
The invention discloses an asphalt concrete prefabricated part based on solid waste materials, which can be prepared by mixing secondary waste pavement milling materials and fine powder processed by waste plastics according to a certain proportion and heating the mixture by microwave. The method can realize hundred percent utilization of the milling material of the pavement, fully utilizes the waste fine material with high asphalt content, saves the consumption of new asphalt and greatly reduces the production cost. Compared with the traditional heating mode, the microwave heating mode has the advantages that the heating speed of the mixture is high, the secondary aging of new and old asphalt is reduced, the waste plastic powder can be harmlessly utilized by the microwave heating mode, the waste plastic powder achieves softening or melting effect after being heated, and the curing effect of the thermoplastic material is fully exerted. And finally, performing surface treatment on the prefabricated part by adopting the emulsified asphalt slurry seal mixture, so that the water resistance and the erosion resistance of the prefabricated part are improved, and the mechanical property of the prefabricated part is improved.
Advantageous effects
The invention discloses an asphalt concrete prefabricated part based on solid waste materials and a preparation method thereof, and compared with the prior art, the technical scheme of the invention at least has the following beneficial effects:
1. the invention can completely utilize the road milling and planing material, in particular secondary waste fine material with high asphalt content, improves the utilization rate of the road milling and planing material, reduces the occupied area of cultivated land, lightens environmental pollution and avoids resource waste.
2. The invention can recycle the waste plastics, reduces the white pollution, and finely grinds the waste plastics into powder by mechanical processing, adds the powder into milling materials, heats the powder to a molten state by microwave, plays a role in solidifying in asphalt mixture and increases the bending and pulling strength of the asphalt mixture.
3. Compared with the traditional heating mode, the microwave heating mode is adopted, the system is uniformly heated, and the asphalt in the waste milling and planing material can be rapidly awakened. The microwave heating can accelerate the demulsification speed of the emulsified asphalt on the inner layer and the outer layer of the mixture, reduce the secondary aging of the new asphalt and the old asphalt, improve the softening or melting effect of the waste plastic powder after being heated by adopting a microwave heating mode, and improve the curing effect of the waste plastic powder.
4. According to the invention, the emulsified asphalt slurry seal mixture is adopted to perform surface treatment on the prefabricated part, so that on one hand, a waterproof film can be added on the surface of the prefabricated part, and the water resistance and the erosion resistance of the prefabricated part are improved; on the other hand, the protective layer is additionally arranged on the surface of the prefabricated part to block the surface gap of the prefabricated part, so that the block body of the prefabricated part is more compact, the particle falling phenomenon is reduced, and the mechanical property of the prefabricated part is improved.
5. Compared with the traditional cement concrete and simply-formed asphalt concrete prefabricated parts, the prefabricated part prepared by adding the polymer emulsified asphalt and the waste plastic powder and adopting a microwave heating mode has higher strength increase compared with the common cement concrete prefabricated part, can reach a preset strength value after being cooled, and saves the curing time of the cement concrete; compared with a simply molded asphalt concrete prefabricated part, the microwave heating can fully exert the thermoplastic characteristics of the waste plastic powder, play a role in curing and enhancing the mixture and improve the strength of the prefabricated part.
Drawings
FIG. 1: front view of RAP preform (kerbstone);
FIG. 2: left view of RAP preform (curb);
FIG. 3: top view of RAP preform (kerb).
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in the present specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the invention.
The following examples are given by way of illustration of embodiments of the invention and are not to be construed as limiting the invention, and it will be understood by those skilled in the art that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.
Example 1
An asphalt concrete prefabricated part based on solid waste materials comprises the following components:
the milling material for the waste road surface comprises 40 parts of the milling material for the waste road surface with the thickness of 0-3 mm and 60 parts of the milling material for the waste road surface with the thickness of 3-5 mm, emulsified asphalt (the mixing amount accounts for 4 parts of the milling material), and waste plastic powder (the mixing amount accounts for 5 parts of the milling material).
The preparation process comprises the following steps:
(1) Mixing the waste road milling materials in proportion, keeping the temperature in an oven at 40-50 ℃ for 1h, pouring the mixture into a mixing pot after the temperature is kept, adding emulsified asphalt, mixing for a period, then adding waste plastic powder, and continuously mixing for a period to obtain an asphalt mixture;
(2) Taking out the asphalt mixture, putting the asphalt mixture into a microwave heating device, heating to 160 ℃, and preserving heat for 30s;
(3) Then loading the asphalt concrete precast concrete into different types of precast member test molds, and fixing the load to 400kN to obtain the asphalt concrete precast member;
(4) And performing surface treatment on the prefabricated part by using the emulsified asphalt slurry seal mixture.
The emulsified asphalt slurry seal mixture comprises the following components: the mixing amount of milling material of 0-3 mm is 50 parts, and the mixing amount of milling material of 3-5 mm is 50 parts; the mixing amount of the emulsified asphalt is 8 parts; the mixing amount of the cement is 1.5 parts; the water content is 8 parts.
Example 2
An asphalt concrete prefabricated part based on solid waste materials comprises the following components:
the waste and old road surface milling and planing material comprises 45 parts of waste and old road surface milling and planing material with the thickness of 0-3 mm and 55 parts of waste and old road surface milling and planing material with the thickness of 3-5 mm, emulsified asphalt (the mixing amount accounts for 3.5 parts of the milling and planing material) and waste and old plastic powder (the mixing amount accounts for 6.5 parts of the milling and planing material).
The preparation process comprises the following steps: mixing the waste and old pavement milling materials in proportion, preserving heat for 1h in a drying oven at the temperature of 40-50 ℃, pouring the mixture into a mixing pot after the heat preservation is finished, adding emulsified asphalt, mixing for a period, then adding waste plastic powder, and continuously mixing for a period to obtain an asphalt mixture; and taking out the asphalt mixture, putting the asphalt mixture into a microwave heating device, heating to 160 ℃, preserving heat for 30s, then putting the asphalt mixture into different types of prefabricated part test molds, fixing the load to 400kN to obtain the asphalt concrete prefabricated part, and performing surface treatment on the prefabricated part by using the emulsified asphalt slurry seal mixture.
The emulsified asphalt slurry seal mixture comprises the following components: the mixing amount of milling materials of 0-3 mm is 55 parts, and the mixing amount of milling materials of 3-5 mm is 45 parts; the mixing amount of the emulsified asphalt is 7.5 parts; the mixing amount of the cement is 2 parts; the water content is 9 parts.
Example 3
An asphalt concrete prefabricated part based on solid waste materials comprises the following components:
the waste and old road surface milling and planing material comprises 50 parts of waste and old road surface milling and planing material with the thickness of 0-3 mm and 50 parts of waste and old road surface milling and planing material with the thickness of 3-5 mm, emulsified asphalt (the mixing amount accounts for 3 parts of the milling and planing material), and waste and old plastic powder (the mixing amount accounts for 8 parts of the milling and planing material).
The preparation process comprises the following steps: mixing the waste and old pavement milling materials in proportion, keeping the temperature for 1h in an oven at 40-50 ℃, pouring the mixture into a mixing pot after the temperature is kept, adding emulsified asphalt, mixing for a period, then adding waste plastic powder, and continuously mixing for a period to obtain an asphalt mixture; taking out the asphalt mixture, putting the asphalt mixture into a microwave heating device, heating to 160 ℃, preserving heat for 30s, then putting the asphalt mixture into different types of prefabricated part test molds, fixing the load to 400kN to obtain the asphalt concrete prefabricated part, and performing surface treatment on the prefabricated part by adopting the emulsified asphalt slurry seal mixture.
The emulsified asphalt slurry seal mixture comprises the following components: 60 parts of milling material with the mixing amount of 0-3 mm and 40 parts of milling material with the mixing amount of 3-5 mm; the mixing amount of the emulsified asphalt is 7 parts; the mixing amount of the cement is 2.5 parts; the water content is 9.5 parts.
Example 4
The same as example 2, except that the microwave heating temperature is 150 ℃.
Example 5
The same as example 2, except that the microwave heating temperature is 170 ℃.
Example 6
The same as example 2, except that the microwave heating time was 10 seconds.
Example 7
The same as example 2, except that the microwave heating and holding time was 60 seconds.
The invention relates to an asphalt concrete prefabricated part based on solid waste materials and a preparation method thereof, which adopts fine materials with high asphalt content as aggregate, emulsified asphalt as cementing material and waste plastic powder as curing material, obtains the concrete prefabricated part in a microwave heating and static pressure forming mode, and finally carries out surface treatment on the prefabricated part by emulsified asphalt slurry seal mixture. The prefabricated part can meet the requirements on mechanical performance in engineering application, and simultaneously, secondary waste milling materials and waste plastics are fully utilized, so that the purposes of resource recycling and ecological environment protection are achieved.
In order to prove the advantages of the solid waste material-based asphalt concrete prefabricated parts according to the present invention, the performances of the solid waste material-based asphalt concrete prefabricated parts prepared in examples 1 to 7 were tested.
Comparative examples 1 to 2: two groups of existing common cement concrete prefabricated parts (kerbs) are selected.
The road performance test results of the solid waste material-based asphalt concrete prefabricated parts prepared in examples 1 to 7 of the present invention and the cement concrete prefabricated parts in comparative examples 1 to 2 are shown in table 1 below.
TABLE 1 road Performance test results for prefabricated parts
The analysis of the test results shows that the mechanical property of the prefabricated member prepared by the RAP material and the waste plastic powder by adopting the method is equivalent to that of the ordinary cement concrete prefabricated member, but the salt spray erosion resistance and the freeze-thaw resistance are far better than those of the conventional ordinary cement concrete prefabricated member; the invention can fully utilize waste milling and planing materials, especially waste fine materials, and simultaneously fully utilize waste plastics, relieve the harm of white pollution to the environment, and simultaneously improve the economic and environmental benefits. The method is convenient to operate and suitable for large-area application and popularization.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (6)
1. The asphalt concrete prefabricated part based on the solid waste material is characterized by comprising a prefabricated part, wherein an emulsified asphalt slurry seal layer is arranged on the surface of the prefabricated part; the prefabricated part comprises the following components in parts by weight: 100 parts of milling material, 1.5-4.5 parts of emulsified asphalt and 3.5-8.5 parts of waste plastic powder; the emulsified asphalt slurry seal coat comprises the following components in parts by weight: milling material 98.5 parts, cement 1.5 parts, emulsified asphalt 2.5-4.5 parts, and water 0.5-3.5 parts;
the preparation method of the asphalt concrete prefabricated part based on the solid waste material comprises the following steps:
(1) Preparing an asphalt mixture: mixing the milling materials in proportion, keeping the temperature in an oven at 40-50 ℃ for a period of time, pouring the mixture into a mixing pot after the temperature is kept, adding emulsified asphalt, uniformly mixing, then adding waste plastic powder, and continuously uniformly mixing to obtain an asphalt mixture;
(2) Microwave heating: taking out the asphalt mixture, putting the asphalt mixture into a microwave heating device, heating to 160 ℃, and preserving heat for 30s;
(3) And (3) static pressure forming: then, filling the asphalt mixture subjected to microwave heating into a prefabricated part test mold, setting the load to be 400kN, and preparing an asphalt concrete prefabricated part by adopting a static pressure forming mode;
(4) Surface treatment: the method comprises the following steps of (1) carrying out surface treatment on a prefabricated part by adopting an emulsified asphalt slurry seal mixture, wherein the surface treatment method comprises the following steps: the emulsified asphalt slurry seal mixture is uniformly mixed according to the proportion and then is uniformly sprayed on the surface of the prefabricated part.
2. The asphalt concrete prefabricated part based on solid waste materials as claimed in claim 1, wherein the milling material is a road surface regeneration material mixture milling material comprising any one or more of AC, SMA, OGFC, ATB, AM, ATPB and LSPM.
3. The solid waste material-based asphalt concrete prefabricated part according to claim 2, wherein the milling material for the prefabricated part comprises: 40-55 parts of milling material with the diameter of 0-3 mm and 45-60 parts of milling material with the diameter of 3-5 mm.
4. The asphalt concrete prefabricated part based on solid waste materials as claimed in claim 2, wherein the milling material for the emulsified asphalt slurry seal comprises: 55-65 parts of milling material with the diameter of 0-3 mm and 55-65 parts of milling material with the diameter of 3-5 mm.
5. The asphalt concrete precast element based on solid waste material according to claim 1, wherein the emulsified asphalt is an oil-in-water emulsion formed by heating road petroleum asphalt to a molten state and dispersing it in an aqueous solution containing SBS latex and its auxiliary agents as fine particles under mechanical agitation.
6. The asphalt concrete prefabricated part based on the solid waste materials as claimed in claim 1, wherein the waste plastic powder is powder ground by one or a mixture of polyethylene and polypropylene plastics, and the specification is 30-50 meshes.
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| CN210287998U (en) * | 2019-03-19 | 2020-04-10 | 西北民族大学 | Road surface repaired regeneration asphalt structure |
| CN111100662A (en) * | 2018-10-29 | 2020-05-05 | 中国石油化工股份有限公司 | Continuous operation method for microwave pyrolysis of waste plastics |
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| JP3695711B2 (en) * | 2002-06-17 | 2005-09-14 | 株式会社舗材サービス | Recycling method for asphalt waste |
| CN102587250A (en) * | 2012-02-28 | 2012-07-18 | 王俊明 | Cold recycled and milled waste asphalt mixture micro-surfacing functional layer |
| CN104529259B (en) * | 2014-12-19 | 2018-01-09 | 重庆鹏方交通科技股份有限公司 | A kind of environment-friendly type asphalt brick compound and its method for preparing asphalt brick |
| CN109722045A (en) * | 2018-12-31 | 2019-05-07 | 山西省交通科学研究院 | A kind of prefabricated assembly structural and its preparation process based on waste asphalt milling material |
| CN109574551A (en) * | 2019-01-28 | 2019-04-05 | 上海时申工贸有限公司 | A kind of environment-friendly type regeneration bituminous concrete and its preparation process |
| CN110372262B (en) * | 2019-08-08 | 2022-05-27 | 辽宁新发展公路科技养护有限公司 | Method for preparing prefabricated kerbstone by utilizing pavement milling and planing material regeneration of asphalt pavement |
| CN112252143A (en) * | 2020-10-30 | 2021-01-22 | 雷宗辉 | Method for performing MS-3 type micro-surfacing construction by using asphalt pavement milling material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111100662A (en) * | 2018-10-29 | 2020-05-05 | 中国石油化工股份有限公司 | Continuous operation method for microwave pyrolysis of waste plastics |
| CN210287998U (en) * | 2019-03-19 | 2020-04-10 | 西北民族大学 | Road surface repaired regeneration asphalt structure |
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