CN113062175A - Recycling method of old municipal road surface material - Google Patents
Recycling method of old municipal road surface material Download PDFInfo
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- CN113062175A CN113062175A CN202110284083.1A CN202110284083A CN113062175A CN 113062175 A CN113062175 A CN 113062175A CN 202110284083 A CN202110284083 A CN 202110284083A CN 113062175 A CN113062175 A CN 113062175A
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- asphalt
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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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
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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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/14—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces for heating or drying foundation, paving, or materials thereon, e.g. paint
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
- Road Repair (AREA)
Abstract
The invention relates to a recycling method of old municipal road materials, which comprises the following specific steps: 1) driving the vehicle body to carry the carriage and the old material recycling mechanism to a specified road surface old material recycling position and lowering the old material recycling mechanism to a state of being attached to the road surface; 2) the old asphalt recycling mechanism is used for movably and uniformly heating the asphalt pavement, and when the old asphalt is softened to be in a liquid state, the old asphalt recycling mechanism is used for pumping the liquefied asphalt into the carriage for filtering; 3) mixing the filtered asphalt with new asphalt according to the ratio of 3-5: 7-5, and storing the mixed asphalt for later use in a heat preservation way; and a filter, a stirrer, an insulation can and a plurality of asphalt pumps are arranged in the carriage. The recycling method of the old municipal road surface materials can recycle the asphalt at the local position of the road surface, the recycling process is more convenient, other intact parts of the road surface cannot be affected, and the recycling method is suitable for rapidly recycling the old materials at the local position of the road surface.
Description
Technical Field
The invention belongs to the technical field of highway maintenance, and particularly relates to a recycling method of old materials of a municipal road surface.
Background
During the maintenance of a road, there are many damaged road surfaces, and if the road surface is re-laid, the cost is high. The cost of re-paving the pavement can be reduced by selecting a method for regenerating the pavement. For the road surface recycling technology, a large amount of asphalt pavement materials are generated mainly by the overhaul and reconstruction of asphalt pavements, and then the asphalt pavement materials are recycled.
After digging, recovering, heating, crushing and screening, the special equipment for pavement regeneration is mixed with a regenerant, new asphalt, new aggregate and the like again according to a certain proportion to form a mixture, and the mixture meets a certain pavement performance and is paved on the pavement again. The asphalt pavement recycling technology comprises a hot-mixing regeneration method and a cold-mixing regeneration method according to construction temperature, and can be a centralized plant-mixing regeneration method and a local regeneration method according to different mixing places of waste materials. Therefore, the asphalt pavement recycling technology can be divided into four construction methods of hot plant mixing regeneration, hot in-place regeneration, cold plant mixing regeneration and cold in-place regeneration.
In the cold milling and hot paving construction of the old road surface, the milling waste is transported back to an asphalt mixing plant, and is mixed and stirred with a new asphalt material, a regenerant and a new aggregate in a certain proportion under a hot state to form an asphalt mixture meeting the requirements. In-situ thermal regeneration, also called thermal surface regeneration, is a construction method mainly used for heating the surface layer of an old pavement to a required depth (generally not more than 3cm), loosening the old pavement, adding a reducing or regenerating agent, and paving and molding again. The cold regeneration of plant mixture is a construction method in which emulsified asphalt or low-viscosity hot asphalt, mixed material of waste asphalt and new aggregate at normal temperature are mixed to form regenerated mixture, which is then spread and compacted to form the road surface after being transported to the construction site. The cold in-place regeneration refers to a construction method of cold crushing and loosening an old pavement, adding emulsified asphalt and other additives, mixing, paving and compacting to form the pavement.
The existing methods for recycling old materials are mostly the four methods, wherein the methods of hot in-place recycling and cold in-place recycling are adopted, but the method for recycling old materials of the road surface disclosed in the application number 201810108101.9 needs to design and construct the pavement in advance, and cannot be applied to recycling the old materials of other road surfaces.
Disclosure of Invention
The invention aims to solve the problems and provide a recycling method of old municipal road materials, which is simple in structure and reasonable in design.
The invention realizes the purpose through the following technical scheme:
a recycling method of old municipal road materials comprises the following specific steps:
1) driving the vehicle body to carry the carriage and the old material recycling mechanism to a specified road surface old material recycling position and lowering the old material recycling mechanism to a state of being attached to the road surface;
2) the old asphalt recycling mechanism is used for movably and uniformly heating the asphalt pavement, and when the old asphalt is softened to be in a liquid state, the old asphalt recycling mechanism is used for pumping the liquefied asphalt into the carriage for filtering;
3) mixing the filtered asphalt with new asphalt according to the ratio of 3-5: 7-5, and storing the mixed asphalt for later use in a heat preservation manner.
As a further optimization scheme of the invention, a filter, a stirrer, an insulation can and a plurality of asphalt pumps are arranged in the carriage, the filter is used for filtering the recovered liquid asphalt, the stirrer is used for mixing and stirring new asphalt and old asphalt, the insulation can is used for preserving and storing the mixed asphalt, and the asphalt pumps are used for pumping and conveying the liquid asphalt.
As a further optimization scheme of the invention, the used material recycling mechanism comprises an adjusting bracket connected to a vehicle body, an adjusting chamber arranged in the adjusting bracket, a first motor connected to the adjusting bracket, a first gear and a second gear movably connected to the inner wall of the adjusting chamber, a first screw rod in threaded connection with the middle part of the second gear, an upper limiting disc connected to the upper end of the first screw rod, a lower limiting disc connected to the outer wall of the first screw rod, a cover body connected to the lower end of the first screw rod, a movable heating mechanism connected to the inner wall of the upper end of the cover body and a plurality of asphalt extracting mechanisms arranged on the side wall of the cover body, wherein the first gear and the second gear are meshed with each other.
As a further optimization scheme of the invention, the movable heating mechanism comprises a first moving mechanism connected to the inner wall of the upper end of the cover body, a second moving mechanism connected to the first moving mechanism, an electric push rod connected to the second moving mechanism, and a resistance wire heating plate connected to the lower end of the electric push rod.
As a further optimization scheme of the invention, the first moving mechanism and the second moving mechanism respectively comprise a connecting frame, a driving motor connected to the connecting frame, a screw rod connected to an output shaft of the driving motor, a connecting slide block connected to the screw rod and a plurality of limiting slide rods connected to the connecting frame, the connecting slide block is provided with through holes matched with the limiting slide rods, and the connecting frame in the second moving mechanism is connected to the connecting slide block in the first moving mechanism.
As a further optimized scheme of the invention, the asphalt extraction mechanism comprises a moving groove arranged on the side wall of the cover body, a sliding groove arranged on the inner wall of the moving groove, a second screw rod arranged in the sliding groove, a sliding block in threaded connection with the second screw rod, a connecting rod connected to the sliding block, a screw cylinder connected to one end of the connecting rod, an extraction and delivery pipe arranged in the screw cylinder, and a delivery pipe connected to one end of the extraction and delivery pipe, wherein the upper end of the cover body is connected with a second motor, and an output shaft of the second motor is connected with the second screw rod.
As a further optimization scheme of the invention, the outer wall of the pumping pipe is provided with external threads matched with the screw cylinder, the outer wall of the pumping pipe is connected with an internal rotating disc, the inner wall of the conveying pipe is provided with a rotating groove matched with the internal rotating disc, and the conveying pipe is connected with an asphalt pump.
As a further optimized scheme of the invention, the sliding block is provided with a screw hole matched with the second screw rod, and a torsional spring is connected between the sliding block and the connecting rod.
As a further optimization scheme of the invention, the second gear is movably connected with the adjusting bracket through a rotary connecting piece, the middle part of the rotary connecting piece is provided with a through hole matched with the first screw rod, and the middle part of the second gear is provided with a screw hole matched with the first screw rod.
The invention has the beneficial effects that:
1) the invention has wide application range, can quickly recover any old material of the asphalt pavement, can not influence the pavement of other sections when recovering the old material at the specified position, and has higher safety;
2) the movable circular heating is adopted when the old road asphalt material is heated and melted, so that the road can be uniformly and fully heated, the old road asphalt material can be fully and quickly melted, and the recovery efficiency is higher.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the used material recycling mechanism of the present invention;
FIG. 3 is a schematic view of the internal mechanism of the used material recycling mechanism of the present invention;
fig. 4 is a schematic structural view of the first moving mechanism or the second moving mechanism in the present invention.
In the figure: 1. a vehicle body; 2. a carriage; 3. a used material recycling mechanism; 301. adjusting the bracket; 302. a conditioning chamber; 303. a first motor; 304. a first gear; 305. a second gear; 306. a rotating connector; 307. a first screw; 308. an upper limiting disc; 309. a lower limiting disc; 310. a cover body; 311. a moving groove; 312. a second motor; 313. a screw cylinder; 314. a connecting rod; 315. pumping out the tube; 316. a delivery pipe; 317. a chute; 318. a second screw; 319. a slider; 320. a first moving mechanism; 321. a second moving mechanism; 322. an electric push rod; 323. resistance wire heating plate.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in figure 1, the recycling method of the old municipal road material comprises the following specific steps:
1) driving the vehicle body 1 to carry the carriage 2 and the old material recycling mechanism 3 to a specified road surface old material recycling position and lowering the old material recycling mechanism 3 to a state of being attached to the road surface;
2) the old material recycling mechanism 3 is used for movably and uniformly heating the asphalt pavement, and when the old asphalt material is softened to be in a liquid state, the old material recycling mechanism 3 is used for pumping the liquefied asphalt into the carriage 2 for filtering;
3) mixing the filtered asphalt with new asphalt according to the ratio of 3-5: 7-5, and storing the mixed asphalt for later use in a heat preservation manner.
Wherein, be equipped with filter, mixer, insulation can and a plurality of pitch pump in the carriage 2, the filter is used for filtering the liquid pitch of retrieving, and the mixer is used for the mixing stirring of new and old pitch, and the insulation can is used for mixing the heat preservation storage of pitch, and the pitch pump is used for drawing and carrying liquid pitch.
As shown in fig. 2, the used material recycling mechanism 3 includes an adjusting bracket 301 connected to the vehicle body 1, an adjusting chamber 302 disposed in the adjusting bracket 301, a first motor 303 connected to the adjusting bracket 301, a first gear 304 and a second gear 305 movably connected to an inner wall of the adjusting chamber 302, a first screw 307 screwed to a middle portion of the second gear 305, an upper limiting plate 308 connected to an upper end of the first screw 307, a lower limiting plate 309 connected to an outer wall of the first screw 307, a cover body 310 connected to a lower end of the first screw 307, a movable heating mechanism connected to an inner wall of an upper end of the cover body 310, and a plurality of asphalt extracting mechanisms disposed on a side wall of the cover body 310, wherein the first gear 304 and the second gear 305 are engaged with each other.
The second gear 305 is movably connected with the adjusting bracket 301 through a rotary connecting piece 306, a through hole matched with the first screw 307 is arranged in the middle of the rotary connecting piece 306, and a screw hole matched with the first screw 307 is arranged in the middle of the second gear 305. When the cover 310 in the used material recycling mechanism 3 needs to be attached to the road surface, the first motor 303 is controlled to work and drive the first gear 304 to rotate, the first gear 304 drives the second gear 305 to rotate, the second gear 305 drives the first screw 307 to move upwards or downwards along the axis direction of the rod body when rotating, so that the height of the cover 310 connected to the lower end of the first screw 307 is adjusted, the cover 310 is lowered to the state of being attached to the road surface when the used road surface material needs to be processed and recycled, the cover 310 is lifted in the moving process of the vehicle body 1 to prevent the cover 310 from influencing the movement of the vehicle body 1, the cover 310 can be locally sealed against the construction affected environment, the influence of the internal high temperature on the outside is prevented, and the safety is high.
As shown in fig. 3, the movable heating mechanism includes a first moving mechanism 320 connected to the inner wall of the upper end of the housing 310, a second moving mechanism 321 connected to the first moving mechanism 320, an electric push rod 322 connected to the second moving mechanism 321, and a resistance wire heating plate 323 connected to the lower end of the electric push rod 322.
As shown in fig. 4, each of the first moving mechanism 320 and the second moving mechanism 321 includes a connecting frame, a driving motor connected to the connecting frame, a lead screw connected to an output shaft of the driving motor, a connecting slider connected to the lead screw, and a plurality of limiting slide bars connected to the connecting frame, the connecting slider is provided with through holes matched with the limiting slide bars, and the connecting frame of the second moving mechanism 321 is connected to the connecting slider of the first moving mechanism 320.
When heating the recovery to the old material of road surface, through control electric putter 322 extension and drive resistance wire hot plate 323 and remove to the position that is close to with the road surface, then give resistance wire hot plate 323 circular telegram, when carrying out heat treatment to the road surface, can drive electric putter 322 and resistance wire hot plate 323 through first moving mechanism 320 and second moving mechanism 321 and carry out reciprocal removal at the uniform velocity, can be so that resistance wire hot plate 323 is treating the removal at the uniform velocity that reciprocates in heating the road surface region, go to reach the effect of carrying out the even heating to this region, can prevent to appear heating inhomogeneous condition, the efficiency of old material recovery has been improved.
As shown in fig. 2 and 3, the asphalt pumping mechanism includes a moving groove 311 disposed on the side wall of the housing 310, a sliding groove 317 disposed on the inner wall of the moving groove 311, a second screw 318 disposed in the sliding groove 317, a sliding block 319 screwed on the second screw 318, a connecting rod 314 connected to the sliding block 319, a screw barrel 313 connected to one end of the connecting rod 314, a pumping pipe 315 disposed in the screw barrel 313, and a delivery pipe 316 connected to one end of the pumping pipe 315, the upper end of the housing 310 is connected to a second motor 312, and an output shaft of the second motor 312 is connected to the second screw 318.
Wherein, the outer wall of the pumping pipe 315 is provided with an external thread matched with the screw cylinder 313, the outer wall of the pumping pipe 315 is connected with an inner rotating disc, the inner wall of the delivery pipe 316 is provided with a rotating groove matched with the inner rotating disc, and the delivery pipe 316 is connected with an asphalt pump. The position of the pumping pipe 315 in the screw 313 can be adjusted during the asphalt pumping, and during the adjustment, the pumping pipe 315 can be rotated to move in the screw 313, and the pumping pipe 315 is movably connected with the delivery pipe 316, so that the delivery pipe 316 is not affected during the adjustment of the pumping pipe 315.
Wherein, a screw hole matched with the second screw 318 is provided on the sliding block 319, and a torsion spring is connected between the sliding block 319 and the connecting rod 314. When the asphalt is extracted, the included angle between the screw cylinder 313 and the ground can be adjusted according to the actual angle, and after the extraction is finished, the torsion spring can restore the screw cylinder 313 to the initial state.
When the old road material is heated uniformly by the resistance wire heating plate 323 and becomes a liquid state, the height of the resistance wire heating plate 323 is increased, then the second motor 312 is controlled to work and drive the second screw 318 to rotate, the second screw 318 drives the slide block 319 connected with the second screw to move downwards in the chute 317 and drives the screw cylinder 313 and the pumping pipe 315 connected with the second screw to move downwards, when the pumping pipe 315 moves to a specified position, the pipe head of the pumping pipe 315 is inserted into the liquid asphalt, the asphalt is pumped into the pumping pipe 315 by the asphalt pump and is conveyed into the carriage 2 from the conveying pipe 316 to be stored for later use after a series of treatments.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. A recycling method of old municipal road materials is characterized by comprising the following specific steps:
1) driving the vehicle body (1) to carry the carriage (2) and the old material recycling mechanism (3) to a specified road surface old material recycling position and lowering the old material recycling mechanism (3) to a state of being attached to the road surface;
2) the old material recycling mechanism (3) is used for movably and uniformly heating the asphalt pavement, and when the old asphalt material is softened to be in a liquid state, the old material recycling mechanism (3) is used for pumping the liquefied asphalt into the carriage (2) for filtering;
3) mixing the filtered asphalt with new asphalt according to the ratio of 3-5: 7-5, and storing the mixed asphalt for later use in a heat preservation manner.
2. The recycling method of the old municipal road surface material according to claim 1, characterized in that: the asphalt mixing device is characterized in that a filter, a stirrer, an insulation can and a plurality of asphalt pumps are arranged in the carriage (2), the filter is used for filtering recycled liquid asphalt, the stirrer is used for mixing and stirring new asphalt and old asphalt, the insulation can is used for storing the mixed asphalt in a heat preservation mode, and the asphalt pumps are used for pumping and conveying the liquid asphalt.
3. The recycling method of the old municipal road surface material according to claim 1, characterized in that: the used material recycling mechanism (3) comprises an adjusting support (301) connected to the vehicle body (1), an adjusting chamber (302) arranged in the adjusting support (301), a first motor (303) connected to the adjusting support (301), a first gear (304) and a second gear (305) movably connected to the inner wall of the adjusting chamber (302), a first screw (307) in threaded connection with the middle of the second gear (305), an upper limiting disc (308) connected to the upper end of the first screw (307), a lower limiting disc (309) connected to the outer wall of the first screw (307), a cover body (310) connected to the lower end of the first screw (307), a movable heating mechanism connected to the inner wall of the upper end of the cover body (310), and a plurality of asphalt extracting mechanisms arranged on the side wall of the cover body (310), wherein the first gear (304) and the second gear (305) are meshed with each other.
4. The recycling method of the old municipal road surface material according to claim 3, characterized in that: the movable heating mechanism comprises a first moving mechanism (320) connected to the inner wall of the upper end of the cover body (310), a second moving mechanism (321) connected to the first moving mechanism (320), an electric push rod (322) connected to the second moving mechanism (321) and a resistance wire heating plate (323) connected to the lower end of the electric push rod (322).
5. The recycling method of the old municipal road surface material according to claim 4, characterized in that: the first moving mechanism (320) and the second moving mechanism (321) respectively comprise a connecting frame, a driving motor connected to the connecting frame, a lead screw connected to an output shaft of the driving motor, a connecting sliding block connected to the lead screw and a plurality of limiting sliding rods connected to the connecting frame, the connecting sliding block is provided with a through hole matched with the limiting sliding rods, and the connecting frame in the second moving mechanism (321) is connected to the connecting sliding block in the first moving mechanism (320).
6. The recycling method of the old municipal road surface material according to claim 3, characterized in that: the asphalt extraction mechanism comprises a moving groove (311) arranged on the side wall of the cover body (310), a sliding groove (317) arranged on the inner wall of the moving groove (311), a second screw (318) arranged in the sliding groove (317), a sliding block (319) in threaded connection with the second screw (318), a connecting rod (314) connected to the sliding block (319), a screw cylinder (313) connected to one end of the connecting rod (314), an extraction pipe (315) arranged in the screw cylinder (313) and a conveying pipe (316) connected to one end of the extraction pipe (315), the upper end of the cover body (310) is connected with a second motor (312), and an output shaft of the second motor (312) is connected with the second screw (318).
7. The recycling method of the old municipal road surface material according to claim 6, characterized in that: the outer wall of the pumping pipe (315) is provided with an external thread matched with the screw cylinder (313), the outer wall of the pumping pipe (315) is connected with an inner rotating disc, the inner wall of the conveying pipe (316) is provided with a rotating groove matched with the inner rotating disc, and the conveying pipe (316) is connected with an asphalt pump.
8. The recycling method of the old municipal road surface material according to claim 6, characterized in that: the sliding block (319) is provided with a screw hole matched with the second screw rod (318), and a torsion spring is connected between the sliding block (319) and the connecting rod (314).
9. The recycling method of the old municipal road surface material according to claim 3, characterized in that: the second gear (305) is movably connected with the adjusting bracket (301) through a rotating connecting piece (306), a through hole matched with the first screw rod (307) is formed in the middle of the rotating connecting piece (306), and a screw hole matched with the first screw rod (307) is formed in the middle of the second gear (305).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110284083.1A CN113062175A (en) | 2021-03-17 | 2021-03-17 | Recycling method of old municipal road surface material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110284083.1A CN113062175A (en) | 2021-03-17 | 2021-03-17 | Recycling method of old municipal road surface material |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006104689A (en) * | 2004-10-01 | 2006-04-20 | Nikko Co Ltd | Method for recycling asphalt pavement waste material |
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| CN108385465A (en) * | 2018-02-02 | 2018-08-10 | 南通城欣市政工程有限公司 | Pavement layer structure and road surface old material recycling method |
| CN110284412A (en) * | 2019-06-18 | 2019-09-27 | 夏志芳 | A kind of traffic engineering pavement of road joint-cutting device |
| CN111663421A (en) * | 2020-06-30 | 2020-09-15 | 重庆工程职业技术学院 | Asphalt pavement recycling equipment |
| CN211665526U (en) * | 2020-01-16 | 2020-10-13 | 王利峰 | Road and bridge crack repairing structure |
| CN211936965U (en) * | 2020-04-14 | 2020-11-17 | 南京林业大学 | Liquid sampling device for physics experiments |
| CN112227143A (en) * | 2020-10-09 | 2021-01-15 | 广东冠粤路桥有限公司 | Asphalt mixture pavement thermal regeneration construction method |
| CN112252122A (en) * | 2020-10-23 | 2021-01-22 | 海环科技集团股份有限公司 | Asphalt in-situ warm mixing regeneration device mechanism |
-
2021
- 2021-03-17 CN CN202110284083.1A patent/CN113062175A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006104689A (en) * | 2004-10-01 | 2006-04-20 | Nikko Co Ltd | Method for recycling asphalt pavement waste material |
| KR20160081749A (en) * | 2015-04-03 | 2016-07-08 | 주식회사 스마트에어챔버 | Automatic Maintenance Vehicle System of Road Pothole |
| CN108385465A (en) * | 2018-02-02 | 2018-08-10 | 南通城欣市政工程有限公司 | Pavement layer structure and road surface old material recycling method |
| CN110284412A (en) * | 2019-06-18 | 2019-09-27 | 夏志芳 | A kind of traffic engineering pavement of road joint-cutting device |
| CN211665526U (en) * | 2020-01-16 | 2020-10-13 | 王利峰 | Road and bridge crack repairing structure |
| CN211936965U (en) * | 2020-04-14 | 2020-11-17 | 南京林业大学 | Liquid sampling device for physics experiments |
| CN111663421A (en) * | 2020-06-30 | 2020-09-15 | 重庆工程职业技术学院 | Asphalt pavement recycling equipment |
| CN112227143A (en) * | 2020-10-09 | 2021-01-15 | 广东冠粤路桥有限公司 | Asphalt mixture pavement thermal regeneration construction method |
| CN112252122A (en) * | 2020-10-23 | 2021-01-22 | 海环科技集团股份有限公司 | Asphalt in-situ warm mixing regeneration device mechanism |
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Application publication date: 20210702 |