CN110436827B - Method for preparing prefabricated pedestrian pavement brick by utilizing pavement milling and planing material regeneration of asphalt pavement - Google Patents
Method for preparing prefabricated pedestrian pavement brick by utilizing pavement milling and planing material regeneration of asphalt pavement Download PDFInfo
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- CN110436827B CN110436827B CN201910728637.5A CN201910728637A CN110436827B CN 110436827 B CN110436827 B CN 110436827B CN 201910728637 A CN201910728637 A CN 201910728637A CN 110436827 B CN110436827 B CN 110436827B
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C15/00—Pavings specially adapted for footpaths, sidewalks or cycle tracks
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C5/00—Pavings made of prefabricated single units
- E01C5/04—Pavings made of prefabricated single units made of bricks
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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
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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 technical field of road engineering materials, and particularly relates to a method for preparing a prefabricated pedestrian path brick by utilizing a pavement milling material regeneration of an asphalt pavement. The technical scheme is as follows: the paint is prepared from the following components in parts by weight: 16 to 20 portions of RAP material (0 to 5mm), 13 to 15 portions of RAP material (5 to 10mm), 8 to 10 portions of RAP material (10 to 20mm), 0.1 to 0.25 portion of regenerant, 1 to 3 portions of fiber reinforcing agent, 1.8 to 2.4 portions of stabilizer, 0.6 to 1 portion of new asphalt, 3 to 5 portions of rubber powder, 4 to 6 portions of corrosion resistant agent, 1.2 to 1.8 portions of waterproof and oil-resistant agent, 1.1 to 1.4 portions of rosin and 2 to 5 portions of inorganic nano ceramic heat-insulating coating. The prefabricated sidewalk brick prepared by the special processes of crushing, screening, recombination and regeneration, prefabrication, health maintenance and the like of the waste milling and planing materials is extremely compact, high in strength, durable, long in service life, and strong in oxidation resistance, low-temperature cracking resistance and corrosion (salt corrosion) resistance.
Description
Technical Field
The invention belongs to the technical field of road engineering materials, and particularly relates to a method for preparing a prefabricated pedestrian path brick by utilizing a pavement milling material regeneration of an asphalt pavement.
Background
In the long-term use process of the asphalt pavement, the use performance of the asphalt pavement is attenuated under the comprehensive actions of heavy traffic, climate environment and the like, so that the indexes of the functional use performance and the structural use performance of the asphalt pavement of partial road sections cannot meet the use requirements, and the asphalt pavement needs to be reconstructed and maintained again. Because of the limitation of the road surface elevation, the road surface major and medium maintenance projects mostly adopt a mode of milling the original road surface and then paving the original road surface again, so that a large amount of waste asphalt milling materials are generated.
If the waste milling material is directly discarded, not only environmental pollution is caused, but also resource waste is caused. On the contrary, after the waste materials are crushed, the additive such as new aggregate, regenerant, asphalt reducer and the like is added to produce regenerated aggregate which meets the standard requirements and meets certain performance indexes, and the regenerated aggregate is reused, so that the problems of stacking and transportation of the waste materials are solved, the environment is protected, the resources are saved, and the construction cost is reduced.
The pedestrian pavement bricks in the highways and urban roads are mainly classified into concrete and natural stone materials according to the materials, are subject to the effects of scouring and erosion of rainwater and road snow-melting agents, have poor salt corrosion resistance, severe weathering and low-temperature fracture phenomena, and have the problems of high manufacturing cost, resource consumption and the like.
Therefore, the regeneration based on the waste asphalt pavement materials and the forming and development of the prefabricated pavement bricks made of the regenerated mixture are developed, the regeneration technology is effectively combined with the construction of auxiliary facilities of pavement engineering, the application problems of poor corrosion resistance and durability, easiness in cracking at low temperature and the like of the conventional pavement bricks are solved, and meanwhile, the development of the research idea and direction of the regeneration and utilization technology of the waste materials are developed.
Disclosure of Invention
The invention provides a method for preparing a prefabricated pavement brick by utilizing the regeneration of a milling material of an asphalt pavement surface layer, the prefabricated pavement brick prepared by special processes of crushing, screening, recombination regeneration, prefabrication, health maintenance and the like of a waste milling material is extremely compact, has long service life, strong oxidation resistance, low-temperature cracking resistance and corrosion (salt corrosion) resistance, has equivalent size and is easy to install, construct and maintain at a later stage. The method not only realizes the recycling of the old materials, changes waste into valuable, saves energy and protects environment, but also obviously reduces the engineering cost of the pavement bricks, solves the application problems of large difficulty in maintenance and replacement, poor corrosion resistance and durability, high cost and the like of the conventional pavement bricks (grouted block stone pavement bricks and grouted sheet stone pavement bricks), and has considerable economic and social benefits.
The technical scheme of the invention is as follows:
the method for preparing the prefabricated pedestrian path brick by utilizing the pavement milling and planing material regeneration of the asphalt pavement is prepared from the following components in parts by weight: 16 to 20 portions of RAP material (0 to 5mm), 13 to 15 portions of RAP material (5 to 10mm), 8 to 10 portions of RAP material (10 to 20mm), 0.1 to 0.25 portion of regenerant, 1 to 3 portions of fiber reinforcing agent, 1.8 to 2.4 portions of stabilizer, 0.6 to 1 portion of new asphalt, 3 to 5 portions of rubber powder, 4 to 6 portions of corrosion resistant agent, 1.2 to 1.8 portions of waterproof and oil-resistant agent, 1.1 to 1.4 portions of rosin and 2 to 5 portions of inorganic nano ceramic heat-insulating coating.
The method for preparing the prefabricated pedestrian path brick by utilizing the pavement milling material regeneration of the asphalt pavement comprises the following steps of preferably, the RAP material is an old pavement material obtained from the asphalt pavement by adopting a milling mode, and is crushed and screened to form three specifications of aggregates, wherein the specifications are as follows: 0-5mm, 5-10mm, 10-20 mm.
The method for preparing the prefabricated pedestrian path brick by utilizing the pavement milling material regeneration of the asphalt pavement has the preferable scheme that the regenerant is a product RA-5 of Hubeiding Shunshun petrochemical company Limited.
The method for preparing the prefabricated sidewalk brick by utilizing the milling material of the asphalt pavement surface layer for regeneration preferably has the scheme that the fiber reinforcing agent is a polyacrylonitrile fiber reinforcing agent.
The method for preparing the prefabricated sidewalk brick by utilizing the pavement milling material regeneration of the asphalt pavement preferably adopts the scheme that the stabilizer is lignin fiber.
The method for preparing the prefabricated sidewalk brick by utilizing the pavement milling and planing material regeneration of the asphalt pavement has the preferable scheme that the new asphalt is road petroleum asphalt with the number of 90, the softening point of not less than 45 ℃ and the penetration at 25 ℃ of 80-100 (0.1 mm).
The method for preparing the prefabricated sidewalk brick by utilizing the pavement milling material regeneration of the asphalt pavement preferably adopts the scheme that the corrosion resistant agent is glass scale anti-corrosion daub.
The method for preparing the prefabricated pedestrian path brick by utilizing the pavement milling material regeneration of the asphalt pavement preferably adopts the scheme that the waterproof and oil-resistant agent is organic silicon resin waterproof and oil-resistant agent.
The method for preparing the prefabricated sidewalk brick by utilizing the pavement milling material regeneration of the asphalt pavement preferably adopts the scheme that the inorganic nano ceramic heat-insulating coating is JRC-B02 which is a product of Zhi Ti science and technology company, and consists of an inorganic adhesive, nano zirconia VK-R30 and hollow microspheres.
The method for preparing the prefabricated pedestrian path brick by utilizing the pavement milling material regeneration of the asphalt pavement comprises the following steps:
step one, crushing and screening waste materials of a surface layer of a milled asphalt pavement to obtain RAP materials of three specifications meeting quality requirements, wherein the specifications are as follows: 0-5mm, 5-10mm, 10-20 mm;
step two, heating the mixing equipment I to 140-150 ℃, and adding 13-15 parts of RAP material (5-10mm), 8-10 parts of RAP material (10-20mm), 0.05-0.1 part of regenerant, 0.5-1.5 parts of fiber reinforcing agent, 0.9-1.8 parts of stabilizer and 0.6-1 part of new asphalt into the mixing equipment I according to the proportion and fully stirring for 8-10min to obtain a mixture I for later use;
step three, heating the mixing equipment II to 160-170 ℃, adding 16-20 parts of RAP material (0-5mm) in the step one, 0.05-0.2 part of regenerant, 0.5-2.5 parts of fiber reinforcing agent, 0.6-1.3 parts of stabilizer and 3-5 parts of rubber powder into the mixing equipment II together according to a proportion, fully stirring for 5-8min, and preserving heat for 10min to ensure that the RAP material and the matrix asphalt fully melt and swell to react to obtain a mixture II for later use;
placing the first mixture and the second mixture into a vibrating machine, and adding 4-6 parts of corrosion resistant agent and 1.1-1.4 parts of rosin; starting a vibrating and stirring device, heating to 160-170 ℃, and vibrating and stirring for 4-6 min; adding 1.2-1.8 parts of waterproof and oil-resistant agent when the temperature is reduced to 110 ℃, and vibrating and stirring for 3-4min to obtain a mixture III for later use;
placing the mixture III in a prefabricated sidewalk brick machine, performing static pressure for 10-15s, and preserving for 10-20 min;
and step six, spraying 2-5 parts of inorganic nano ceramic heat-insulating coating on the cured product obtained in the step five to obtain the prefabricated sidewalk brick.
Wherein:
the regenerant is preferably a special regenerant RA-5 for the product road of Hubeidingshun petrochemical company Limited, and has the main functions of: the activity of the asphalt in the waste asphalt pavement milling material is excited, the agglomerated asphalt is re-melted and dispersed, the colloid structure of the asphalt is adjusted, the brittle and hard old asphalt mixture is softened, the rheological property of the asphalt is improved, and the waste mixture recovers or approaches the original performance.
The fiber reinforcing agent is polyacrylonitrile fiber reinforcing agent, preferably Shenzhen Shenchuan Delannit company
The AS polyacrylonitrile fiber reinforcing agent mainly has the following functions: the crack resistance and the integral strength of the prefabricated sidewalk brick are improved; improving the impermeability of the concrete: the compactness of the prefabricated pedestrian path brick is improved and the formation of through capillary pores is reduced or blocked by three-dimensional disorderly distribution of a plurality of polyacrylonitrile fibers in the prefabricated pedestrian path brick, so that the impermeability of the prefabricated pedestrian path brick is improved; and thirdly, the toughness of the prefabricated sidewalk brick is improved, the polyacrylonitrile fiber has certain elongation and higher tensile strength, and when the prefabricated sidewalk brick is pressed or damaged by stretching, the fiber is stretched and deformed at first to absorb external stress, so that the toughness of the prefabricated sidewalk brick is improved. And fourthly, the impact resistance of the prefabricated sidewalk brick is improved, the added polyacrylonitrile fiber reinforcing agent can absorb external stress energy to a greater extent, and the absorption capacity of the prefabricated sidewalk brick on impact energy is improved.
The stabilizer is lignin fiber, preferably the lignin fiber for the reclaimed Terley, and has the main functions of: the chemical stability and the thickening anti-cracking performance of the prefabricated sidewalk brick are improved, and meanwhile, the addition of the lignin fiber can reduce the number of the gaps inside the prefabricated sidewalk brick, namely, the water content inside the prefabricated sidewalk brick is reduced, so that the anti-freezing performance of the prefabricated sidewalk brick is improved.
The new asphalt is road petroleum asphalt with the number of 90, the softening point of more than or equal to 45 ℃, the penetration at 25 ℃ of 80-100 (0.1mm), and the main functions are as follows: the cementing material in the regenerated mixture is supplemented, and the cementing capacity of the mixture is improved.
The rubber powder is waste tire rubber powder, preferably 100-mesh 120-mesh fine rubber powder of Shandong Zhouhihe Huayuan rubber company, and mainly has the following functions: the bonding performance of the cementing material in the regenerated mixture is greatly improved, so that the prefabricated sidewalk brick is compact and durable, and the high-temperature stability, low-temperature flexibility, ageing resistance, water damage resistance and the like of the prefabricated sidewalk brick are comprehensively improved.
The corrosion-resistant agent is preferably glass flake anticorrosive mortar produced by Hebei Jia Xin Bao chemical company, and has the main functions of: the comprehensive performances of salt corrosion resistance, weathering resistance, ultraviolet resistance and the like of the prefabricated sidewalk brick are improved.
The waterproof and oil-resistant agent is an organic silicon resin waterproof and oil-resistant agent of Hubei environmental chemical Limited company, is composed of a silicon resin solution, a penetrating agent and a tackifier, and mainly has the following functions: the waterproof and oil (gasoline and diesel) corrosion resistance of the prefabricated sidewalk brick is improved.
The rosin is preferably rosin powder crystal for industrial products of chemical companies of Jinnsida, and has the main functions of: the high-temperature stability of the precast sidewalk brick mixture is improved, and the stiffness modulus of asphalt in the recycled mixture is improved, so that the strength of the precast sidewalk brick is improved.
The inorganic nano ceramic heat-insulating coating is preferably JRC-B02 product of Zhi Ti science and technology company, and mainly has the following functions: the spraying of the inorganic nano ceramic heat-insulating coating on the surface layer of the prefabricated sidewalk brick is to improve the overall stability (high-temperature stability) of the prefabricated sidewalk brick in the high-temperature period in summer and the energy storage function (low-temperature cracking resistance) in the low-temperature period in winter.
The invention has the beneficial effects that:
1) the pavement brick has the advantages that the pavement brick is prefabricated by a special preparation process, has excellent mechanical and pavement properties, and completely meets the high standards and high requirements on waste material recycling technology under increasingly heavy traffic loads and severe weather environment conditions.
2) The technology adopted by the invention can recycle the old pavement materials by 100 percent, changes waste into valuable, solves the problem of environmental pollution caused by a large amount of waste materials generated by the maintenance and reconstruction of the pavement, saves a large amount of sandstone materials and asphalt resources, reduces the construction cost, and enables the limited construction and maintenance funds to exert the maximum efficiency.
3) Compared with the conventional concrete pavement bricks and natural stone pavement bricks, the asphalt pavement waste material regenerated prefabricated sidewalk brick has the advantages of low manufacturing cost (the periodic maintenance cost can be saved by more than 38%), high strength, durability, salt corrosion resistance, weathering resistance, excellent low-temperature cracking resistance, equivalent size and easiness in installation, construction and later-stage maintenance.
4) The invention solves the problems of high cost, poor salt corrosion resistance, serious weathering and oxidation, difficult maintenance and replacement, resource consumption and the like of the conventional concrete and natural stone pedestrian path bricks of highways and urban roads, and greatly improves the road performance and the construction workability of the pedestrian path bricks. Meanwhile, the method opens up a river and widens the research thought and direction of the old material recycling technology.
Detailed Description
Example 1
The method for preparing the prefabricated pedestrian path brick by utilizing the pavement milling and planing material regeneration of the asphalt pavement is prepared from the following components in parts by weight: RAP material (0-5 mm): 16.5 parts of RAP material (5-10 mm): 13.2 parts of RAP material (10-20 mm): 8.3 parts of a regenerant: 0.18 part of fiber reinforcing agent: 2.4 parts of stabilizer: 1.9 parts of new asphalt: 0.68 part, rubber powder: 3.2 parts of corrosion-resistant agent: 4.7 parts of water-proof and oil-resistant agent: 1.3 parts of rosin: 1.1 parts of inorganic nano ceramic heat-insulating coating: 2.5 parts. The regenerant is RA-5 which is a special regenerant for the product road of Hubeidingshun petrochemical company Limited. The fiber reinforcing agent is Shenzhen Hichuan Delandmate company
AS polyacrylonitrile fiber reinforcing agent. The stabilizer is lignin fiber for crofton. The new asphalt is road petroleum asphalt with a mark number of 90, and the producing area is LiaoliaoThe softening point of the river is more than or equal to 45 ℃, and the penetration degree at 25 ℃ is 80-100 (0.1 mm). The rubber powder is 140-mesh 160-mesh fine rubber powder of Shandong Zhouzuhuanyuan rubber company. The corrosion resistant agent is glass flake anticorrosive mortar of Hebei Jia Xin Bao chemical company. The waterproof and oil-resistant agent is an organic silicon resin waterproof and oil-resistant agent in the environment chemical industry. The rosin is selected from rosin powder crystal for industrial products of chemical company Jinan Xundali. The inorganic nano ceramic heat-insulating coating is a product JRC-B02 of Zhi Ti science and technology company, and consists of an inorganic adhesive, nano zirconia VK-R30 and hollow microspheres.
The method specifically comprises the following steps:
step one, crushing and screening waste materials of a surface layer of a milled asphalt pavement to obtain RAP materials of three specifications meeting quality requirements, wherein the specifications are as follows: 0-5mm, 5-10mm, 10-20 mm;
step two, heating the mixing equipment I to 140-150 ℃, and adding 13.2 parts of RAP material (5-10mm), 8.3 parts of RAP material (10-20mm), 0.08 part of regenerant, 1 part of fiber reinforcing agent, 1.1 parts of stabilizer and 2 parts of new asphalt in the mixing equipment I according to the proportion and fully stirring for 8-10min to obtain a mixture I for later use;
step three, heating the mixing device II to 160-170 ℃, adding 16.5 parts of RAP material (0-5mm) in the step one, 0.1 part of regenerant, 1.4 parts of fiber reinforcing agent, 0.8 part of stabilizer and 3.2 parts of rubber powder into the mixing device II together according to a proportion, fully stirring for 5-8min, and preserving heat for 10min to ensure that the RAP material and the matrix asphalt fully melt and swell and react to obtain a mixture II for later use;
placing the mixture I and the mixture II in a vibrating machine, and adding 4.7 parts of corrosion resistant agent and 1.1 parts of rosin; starting a vibrating and stirring device, heating to 160-170 ℃, and vibrating and stirring for 4-6 min; adding 1.3 parts of waterproof and oil-resistant agent when the temperature is reduced to 110 ℃, and vibrating and stirring for 3-4min to obtain a mixture III for later use;
placing the mixture III in a prefabricated sidewalk brick machine, performing static pressure for 10-15s, and preserving for 10-20 min;
and step six, spraying 2.5 parts of inorganic nano ceramic heat-insulating coating on the cured product obtained in the step five to obtain the prefabricated sidewalk brick.
Example 2
The difference from the embodiment 1 is that the components by weight are as follows: RAP material (0-5 mm): 18 parts of RAP material (5-10 mm): 14 parts of RAP material (10-20 mm): 8.8 parts of a regenerant: 0.22 part of fiber reinforcing agent: 2.6 parts of stabilizer: 2.1 parts of new asphalt: 0.82 part, rubber powder: 3.8 parts of corrosion resistant agent: 5.3 parts of waterproof and oil-resistant agent: 1.5 parts of rosin: 1.28 parts of inorganic nano ceramic heat-insulating coating: 3.5 parts. The distribution ratio is as follows: in the second step, 0.08 part of regenerant, 1.2 parts of fiber reinforcing agent and 1.3 parts of stabilizer; in the third step, the regenerant (0.14 part), the fiber reinforcing agent (1.4 parts) and the stabilizer (0.8 part) are added.
Example 3
The difference from the embodiment 1 is that the components by weight are as follows: RAP material (0-5 mm): 19.2 parts of RAP material (5-10 mm): 14.7 parts of RAP material (10-20 mm): 9 parts of a regenerant: 0.25 part of fiber reinforcing agent: 3 parts of a stabilizer: 2.4 parts of new asphalt: 0.95 part, rubber powder: 4.6 parts of corrosion-resistant agent: 6 parts of water-proof and oil-resistant agent: 1.8 parts of rosin: 1.36 parts of inorganic nano ceramic heat-insulating coating: 4.2 parts. The distribution ratio is as follows: in the second step, 0.08 part of regenerant, 1.4 parts of fiber reinforcing agent and 1.5 parts of stabilizer; in the third step, the regenerant (0.17 part), the fiber reinforcing agent (1.6 parts) and the stabilizer (0.9 part) are added.
Examples 1-3 the pavement performance test results of the pavement bricks prepared by regenerating the asphalt pavement surface milling material are shown in table 1:
TABLE 1
Comparative example
Selecting cement concrete pedestrian path bricks commonly used in road engineering. The results of the performance measurements are shown in table 2:
TABLE 2
As can be seen from tables 1 to 2, the performance of the asphalt pavement surface milling material recycled precast pavement bricks prepared according to embodiments 1 to 3 of the present invention can meet the technical requirements of the technical specification for asphalt pavement construction for highways (JTG F40) issued by the ministry of transportation of the people's republic of china, each performance index is better than that of the conventional concrete pavement bricks, and the compressive strength is equivalent to that of the concrete pavement bricks. Meanwhile, the pavement surface layer milling material regeneration prefabricated pavement brick is extremely compact, high in strength and durability, strong in oxidation resistance, low-temperature cracking resistance and corrosion (salt corrosion) resistance, the high-temperature and low-temperature performance and durability of the pavement brick are greatly improved, and the production and use cost is obviously reduced.
The present invention is not limited to the above-described examples, and the embodiments of the present invention are described in the above-described examples and the description, but various modifications and changes may be made without departing from the spirit and scope of the present invention, and these modifications and changes fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The method for preparing the prefabricated pavement brick by utilizing the pavement milling and planing material regeneration of the asphalt pavement is characterized by comprising the following components in parts by weight: 16.5 parts of 0-5mm RAP material, 13.2 parts of 5-10mm RAP material, 8.3 parts of 10-20mm RAP material, 0.18 part of regenerant, 2.4 parts of fiber reinforcing agent, 1.9 parts of stabilizer, 0.68 part of new asphalt, 3.2 parts of rubber powder, 4.7 parts of corrosion resistant agent, 1.3 parts of waterproof and oil-resistant agent, 1.1 parts of rosin and 2.5 parts of inorganic nano ceramic heat insulation coating, wherein the stabilizer is lignin fiber, the new asphalt is road petroleum asphalt with the number of 90, the softening point is not less than 45 ℃, the penetration at 25 ℃ is 80-100 (0.1mm) of scale, and the corrosion resistant agent is glass corrosion resistant daub, and specifically comprises the following steps:
step one, crushing and screening waste materials of a surface layer of a milled asphalt pavement to obtain RAP materials of three specifications meeting quality requirements, wherein the specifications are as follows: 0-5mmRAP material, 5-10mmRAP material, 10-20mmRAP material;
step two, heating the mixing equipment I to 140-150 ℃, and adding 13.2 parts of the RAP material with the diameter of 5-10mm, 8.3 parts of the RAP material with the diameter of 10-20mm, 0.08 part of a regenerant, 1 part of a fiber reinforcing agent, 1.1 parts of a stabilizer and 2 parts of new asphalt in the mixing equipment I according to the proportion and fully stirring for 8-10min to obtain a mixture I for later use;
step three, heating the mixing device II to 160-170 ℃, adding 16.5 parts of the 0-5mm RAP material obtained in the step one, 0.1 part of a regenerant, 1.4 parts of a fiber reinforcing agent, 0.8 part of a stabilizer and 3.2 parts of rubber powder into the mixing device II together according to a proportion, fully stirring for 5-8min, and preserving heat for 10min to ensure that the RAP material and the matrix asphalt fully melt and swell to react to obtain a mixture II for later use;
placing the mixture I and the mixture II in a vibrating machine, and adding 4.7 parts of corrosion resistant agent and 1.1 parts of rosin; starting a vibrating and stirring device, heating to 160-170 ℃, and vibrating and stirring for 4-6 min; adding 1.3 parts of waterproof and oil-resistant agent when the temperature is reduced to 110 ℃, and vibrating and stirring for 3-4min to obtain a mixture III for later use;
placing the mixture III in a prefabricated sidewalk brick machine, performing static pressure for 10-15s, and preserving for 10-20 min;
and step six, spraying 2.5 parts of inorganic nano ceramic heat-insulating coating on the cured product obtained in the step five to obtain the prefabricated sidewalk brick.
2. The method for preparing the prefabricated pavement brick by utilizing the pavement milling and planing material regeneration of the asphalt pavement is characterized by comprising the following components in parts by weight: 18 parts of 0-5mm RAP material, 14 parts of 5-10mm RAP material, 8.8 parts of 10-20mm RAP material, 0.22 part of regenerant, 2.6 parts of fiber reinforcing agent, 2.1 parts of stabilizer, 0.82 part of new asphalt, 3.8 parts of rubber powder, 5.3 parts of corrosion resistant agent, 1.5 parts of waterproof and oil-resistant agent, 1.28 parts of rosin and 3.5 parts of inorganic nano ceramic heat insulation coating, wherein the stabilizer is lignin fiber, the new asphalt is road petroleum asphalt and is numbered as No. 90, the softening point is not less than 45 ℃, the penetration at 25 ℃ is 80-100 (0.1mm), and the corrosion resistant agent is glass flake anticorrosive daub, and the method specifically comprises the following steps:
step one, crushing and screening waste materials of a surface layer of a milled asphalt pavement to obtain RAP materials of three specifications meeting quality requirements, wherein the specifications are as follows: 0-5mmRAP material, 5-10mmRAP material, 10-20mmRAP material;
step two, heating the mixing equipment I to 140-150 ℃, and adding 14 parts of the RAP material with the diameter of 5-10mm, 8.8 parts of the RAP material with the diameter of 10-20mm, 0.08 part of a regenerant, 1.2 parts of a fiber reinforcing agent, 1.3 parts of a stabilizer and 0.82 part of new asphalt into the mixing equipment I according to the proportion, and fully stirring for 8-10min to obtain a mixture I for later use;
step three, heating the mixing device II to 160-170 ℃, adding 18 parts of the RAP material with the thickness of 0-5mm, 0.14 part of a regenerant, 1.4 parts of a fiber reinforcing agent, 0.8 part of a stabilizer and 3.8 parts of rubber powder into the mixing device II according to a proportion, fully stirring for 5-8min, and preserving heat for 10min to ensure that the RAP material and the matrix asphalt fully melt and swell and react to obtain a mixture II for later use;
placing the first mixture and the second mixture in a vibrating machine, and adding 5.3 parts of corrosion resistant agent and 1.28 parts of rosin; starting a vibrating and stirring device, heating to 160-170 ℃, and vibrating and stirring for 4-6 min; when the temperature is reduced to 110 ℃, 1.5 parts of waterproof and oil-resistant agent is added, and the mixture is stirred for 3-4min by vibration to obtain a mixture III for later use;
placing the mixture III in a prefabricated sidewalk brick machine, performing static pressure for 10-15s, and preserving for 10-20 min;
and step six, spraying 3.5 parts of inorganic nano ceramic heat-insulating coating on the cured product obtained in the step five to obtain the prefabricated sidewalk brick.
3. The method for preparing the prefabricated pavement brick by utilizing the pavement milling and planing material regeneration of the asphalt pavement is characterized by comprising the following components in parts by weight: 19.2 parts of 0-5mm RAP material, 14.7 parts of 5-10mm RAP material, 9 parts of 10-20mm RAP material, 0.25 part of regenerant, 3.0 parts of fiber reinforcing agent, 2.4 parts of stabilizer, 0.95 part of new asphalt, 4.6 parts of rubber powder, 6 parts of corrosion resistant agent, 1.8 parts of waterproof and oil-resistant agent, 1.36 parts of rosin and 4.2 parts of inorganic nano ceramic heat insulation coating, wherein the stabilizer is lignin fiber, the new asphalt is road petroleum asphalt and is numbered as No. 90, the softening point is not less than 45 ℃, the penetration at 25 ℃ is 80-100 (0.1mm), and the corrosion resistant agent is glass flake anticorrosive daub, and the method specifically comprises the following steps:
step one, crushing and screening waste materials of a surface layer of a milled asphalt pavement to obtain RAP materials of three specifications meeting quality requirements, wherein the specifications are as follows: 0-5mmRAP material, 5-10mmRAP material, 10-20mmRAP material;
step two, heating the mixing equipment I to 140-150 ℃, and adding 14.7 parts of the RAP material with the diameter of 5-10mm, 9 parts of the RAP material with the diameter of 10-20mm, 0.08 part of a regenerant, 1.4 parts of a fiber reinforcing agent, 1.5 parts of a stabilizer and 0.95 part of new asphalt in the mixing equipment I according to the proportion to fully stir for 8-10min to obtain a mixture I for later use;
step three, heating the mixing device II to 160-170 ℃, adding 19.2 parts of the 0-5mm RAP material obtained in the step one, 0.17 part of a regenerant, 1.6 parts of a fiber reinforcing agent, 0.9 part of a stabilizer and 4.6 parts of rubber powder into the mixing device II together according to a proportion, fully stirring for 5-8min, and preserving heat for 10min to ensure that the RAP material and the matrix asphalt are fully subjected to a fusion-expansion reaction to obtain a mixture II for later use;
placing the mixture I and the mixture II in a vibrating machine, and adding 6 parts of corrosion resistant agent and 1.36 parts of rosin; starting a vibrating and stirring device, heating to 160-170 ℃, and vibrating and stirring for 4-6 min; when the temperature is reduced to 110 ℃, 1.8 parts of waterproof and oil-resistant agent is added, and the mixture is stirred for 3-4min by vibration to obtain a mixture III for later use;
placing the mixture III in a prefabricated sidewalk brick machine, performing static pressure for 10-15s, and preserving for 10-20 min;
and step six, spraying 4.2 parts of inorganic nano ceramic heat-insulating coating on the cured product obtained in the step five to obtain the prefabricated sidewalk brick.
4. The method for recycling the milled material of the asphalt pavement surface layer to prepare the prefabricated pedestrian pavement brick according to any one of claims 1, 2 or 3, wherein the recycling agent is RA-5, a product of Hubeiding petrochemical company Limited.
5. The method for recycling the milled material of the bituminous pavement surface layer for producing the prefabricated pavement brick according to any one of claims 1, 2 or 3, wherein the fiber reinforcement is polyacrylonitrile fiber reinforcement.
6. The method for preparing the prefabricated sidewalk brick by recycling the milling material for the asphalt pavement according to any one of claims 1, 2 or 3, wherein the water and oil resistant agent is a silicone resin water and oil resistant agent.
7. The method for recycling the milled material of the bituminous pavement surface layer to prepare the prefabricated sidewalk brick according to any one of claims 1, 2 or 3, wherein the inorganic nano-ceramic thermal insulation coating is JRC-B02, a product of Zhi Ti science and technology, and comprises an inorganic adhesive, nano-zirconia VK-R30 and hollow microspheres.
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