CN219670984U - Open seal layer structure based on regenerated mineral aggregate - Google Patents
Open seal layer structure based on regenerated mineral aggregate Download PDFInfo
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- CN219670984U CN219670984U CN202320261898.2U CN202320261898U CN219670984U CN 219670984 U CN219670984 U CN 219670984U CN 202320261898 U CN202320261898 U CN 202320261898U CN 219670984 U CN219670984 U CN 219670984U
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- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 138
- 239000011707 mineral Substances 0.000 title claims abstract description 138
- 239000010426 asphalt Substances 0.000 claims abstract description 87
- 239000004575 stone Substances 0.000 claims abstract description 28
- 239000002245 particle Substances 0.000 claims description 121
- 239000004568 cement Substances 0.000 claims description 24
- 239000000203 mixture Substances 0.000 abstract description 24
- 238000007789 sealing Methods 0.000 abstract description 17
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 230000008929 regeneration Effects 0.000 abstract description 7
- 238000011069 regeneration method Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 6
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 178
- 201000010099 disease Diseases 0.000 description 7
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000012492 regenerant Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model relates to the technical field of asphalt mixture recycling, and provides an open seal layer structure based on recycled mineral aggregate. According to the open-seal layer structure based on the regenerated mineral aggregate, the broken stone seal layer is arranged, so that the waterproof performance and the crack resistance of the pavement are improved; by arranging the micro-surfacing layer, the macadam sealing layer is stabilized, the wear resistance and the skid resistance of the pavement are improved, the pollution is reduced, and the waterproof performance of the pavement is improved; through setting up rubble seal and little apparent department layer, improved former road surface life and service quality, and rubble seal and little apparent department layer are the regeneration mineral aggregate layer, solve among the prior art lack the high quality of old asphalt mixture and be applied to highway construction and maintenance in-process problem.
Description
Technical Field
The utility model relates to the technical field of asphalt mixture recycling, in particular to an open seal layer structure based on regenerated mineral aggregate.
Background
At present, the asphalt pavement which needs to be maintained in China every year reaches about 15 percent, and the old asphalt mixture generated by maintenance of the asphalt pavement and other sources reaches 2 hundred million tons. The stacking of the old asphalt mixture not only occupies precious land resources, but also causes water and soil pollution due to partial toxic and harmful substances in the asphalt mixture. However, there is currently no way to use old asphalt mixtures of high quality during highway construction and maintenance.
Disclosure of Invention
The utility model provides an open seal layer structure based on regenerated mineral aggregate, which is used for solving the problem that the prior art lacks of applying old asphalt mixture to the highway construction and maintenance process in high quality.
The utility model provides an open seal layer structure based on regenerated mineral aggregate, which comprises the following components:
a macadam seal layer paved on an original road surface;
the micro-surfacing layer is laid on the crushed stone seal layer, and the micro-surfacing layer and the crushed stone seal layer are both regenerated mineral material layers.
According to the open-seal layer structure based on the reclaimed mineral aggregate, the reclaimed mineral aggregate layer comprises the reclaimed mineral aggregate particles which are tiled and the asphalt cement layer which is adhered with the reclaimed mineral aggregate particles, and the reclaimed mineral aggregate particles are embedded in the asphalt cement layer.
According to the open-seal layer structure based on the regenerated mineral aggregate, the crushed stone seal layer comprises an upper seal layer and a lower seal layer, the upper seal layer is laid above the lower seal layer, and the particle size of the regenerated mineral aggregate particles of the upper seal layer is smaller than that of the regenerated mineral aggregate particles of the lower seal layer.
According to the open seal layer structure based on the regenerated mineral aggregate, the regenerated mineral aggregate particles of the upper seal layer are embedded in gaps among the regenerated mineral aggregate particles of the lower seal layer.
According to the open seal layer structure based on the regenerated mineral aggregate, the asphalt cement layer is a rubber asphalt layer or a modified emulsified asphalt layer.
According to the open seal layer structure based on the regenerated mineral aggregate, the particle size of the regenerated mineral aggregate particles of the upper seal layer is 4.75-9.5mm.
According to the open seal layer structure based on the regenerated mineral aggregate, the particle size of the regenerated mineral aggregate particles of the lower seal layer is 9.5-16mm.
According to the open seal layer structure based on the regenerated mineral aggregate, the particle size of the regenerated mineral aggregate particles of the lower seal layer is 9.5-13.2mm or 13.2-16mm.
According to the open seal layer structure based on the regenerated mineral aggregate, the particle size of the regenerated mineral aggregate particles of the micro surfacing layer is 0-9.5mm.
According to the open seal layer structure based on the regenerated mineral aggregate, the thickness of the crushed stone seal layer is 15-25mm.
According to the open-seal layer structure based on the regenerated mineral aggregate, provided by the utility model, the broken stone seal layer is arranged, so that the waterproof performance and the crack resistance of the pavement are improved, the aging of asphalt is delayed, and the original pavement is protected; through setting up little surface department layer, stabilize the rubble seal, increase road surface wearability and skid resistance, reduce pollution, further improve road surface waterproof performance simultaneously, provide further protection for former road surface. Through setting up rubble seal and micro-surfacing department layer, provide a closely knit seal for former road surface, play anti-crack, waterproof and skid-resistant effect, can effectively improve former road surface quality of service, delay former road surface disease's emergence, the life of extension former road surface to rubble seal and micro-surfacing department layer are the regeneration mineral aggregate layer, through changing old and useless asphalt mixture into regeneration mineral aggregate, again with regeneration mineral aggregate be used for rubble seal and micro-surfacing department layer to shop. The method not only avoids pollution caused by the waste asphalt mixture, but also provides an effective way for utilizing the waste asphalt mixture with high quality in the highway construction and maintenance process.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an open seal layer structure based on reclaimed mineral aggregate provided in an embodiment of the present utility model;
reference numerals:
1: a broken stone seal layer; 11: an upper seal layer; 12: a lower sealing layer; 2: a micro-surfacing layer;
200: original road surface.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The open seal layer structure based on reclaimed mineral aggregate of the present utility model is described below in conjunction with fig. 1.
Specifically, as shown in fig. 1, the utility model provides an open seal layer structure based on recycled mineral aggregate, which comprises a broken stone seal layer 1 and a micro-surfacing layer 2, wherein the broken stone seal layer 1 is paved on an original road surface 200, the micro-surfacing layer 2 is paved on the broken stone seal layer 1, and the micro-surfacing layer 2 and the broken stone seal layer 1 are both recycled mineral aggregate layers.
In this embodiment, the open seal layer structure based on the recycled mineral aggregate is suitable for being paved on the original pavement 200, the original pavement 200 can be an old asphalt pavement, and the existing pavement is easy to cause diseases due to factors such as vehicle load effect, rain and snow erosion and aging effect, so that the service life of the pavement is reduced. The macadam seal layer 1 is paved on the original pavement 200 and is used for improving the waterproof performance and the crack resistance of the pavement, delaying the aging of asphalt and providing protection for the original pavement 200. The micro-surfacing layer 2 is paved on the chip seal layer 1 and is used for stabilizing the chip seal layer 1 at the lower layer and increasing the wear resistance and the skid resistance of the pavement, meanwhile, the micro-surfacing layer 2 can further improve the waterproof performance of the pavement, further protect the original pavement 200 and prolong the service life of the original pavement 200; and the crushed stone seal layer 1 and the micro surface layer 2 are both regenerated mineral aggregate layers, so that the waste asphalt mixture is reused.
According to the open-seal layer structure based on the regenerated mineral aggregate, the broken stone seal layer 1 is arranged, so that the waterproof performance and the crack resistance of the pavement are improved, the aging of asphalt is delayed, and the original pavement 200 is protected; through setting up little surface department layer 2, stabilize lower floor's rubble seal 1, increase road surface wearability and skid resistance, further improve road surface waterproof performance simultaneously, provide further protection for former road surface 200, improve former road surface 200's life. Through setting up rubble seal 1 and micro-surfacing layer 2, provide a closely knit seal for former road surface 200, play crack resistance, waterproof and skid resistance's effect, can effectively improve former road surface 200 quality of service, delay former road surface 200 disease's emergence, the life of former road surface 200 is prolonged to rubble seal 1 and micro-surfacing layer 2 are the regeneration mineral aggregate layer, through changing old asphalt mixture into regeneration mineral aggregate, again with regeneration mineral aggregate be used for rubble seal 1 and micro-surfacing layer 2 to build. The method not only avoids pollution caused by the waste asphalt mixture, but also provides an effective way for utilizing the waste asphalt mixture with high quality in the highway construction and maintenance process.
Specifically, the old asphalt mixture has obvious agglomeration phenomenon, the milled asphalt mixture mineral aggregate particles are typical false particles, the asphalt content and grading variability of the old asphalt mixture are very large, the quality of the regenerated mixture is directly influenced, the mineral aggregate particles and the asphalt are separated through fine separation of the old asphalt mixture, and the mineral aggregate particles are screened into multi-grade regenerated mineral aggregate particles with the particle size range of 0-2.36mm, 2.36-4.75mm, 4.75-9.5mm, 9.5-16mm and the like. For example, the old asphalt mixture is finely separated by a centrifugal separation apparatus and a vibratory screening apparatus, thereby utilizing the old asphalt mixture with high quality. It should be noted that, since mineral aggregate particles with a larger particle size are easily separated from asphalt, mineral aggregate particles with a smaller particle size are difficult to separate from asphalt, most of old asphalt remains in regenerated mineral aggregate particles with particle sizes ranging from 0 to 2.36mm and 2.36 to 4.75mm, while only a small amount of old asphalt remains in mineral aggregate particles with particle sizes greater than 4.75mm after the fine separation process.
Specifically, the regenerated mineral aggregate layer comprises tiled regenerated mineral aggregate particles and an asphalt cement layer bonded with the regenerated mineral aggregate particles, and the regenerated mineral aggregate particles are embedded in the asphalt cement layer.
In the embodiment, the regenerated mineral aggregate layer comprises regenerated mineral aggregate particles and an asphalt cement layer, so that the mineral aggregate particles in the old asphalt mixture can be fully recycled, and the utilization rate is improved; the recycled mineral aggregate particles are adhered by the asphalt cement layer, so that the recycled mineral aggregate particles are stabilized, the waterproof performance and the structural strength are improved, and the recycled mineral aggregate particles do not need to be subjected to a pre-wrapping process due to old asphalt adhered to the surfaces of the recycled mineral aggregate particles, so that the cost is saved.
Specifically, as shown in fig. 1, the crushed stone seal layer 1 comprises an upper seal layer 11 and a lower seal layer 12, wherein the upper seal layer 11 is laid above the lower seal layer 12, and the particle size of regenerated mineral aggregate particles of the upper seal layer 11 is smaller than that of regenerated mineral aggregate particles of the lower seal layer 12.
In this embodiment, by setting the crushed stone seal layer 1 to include the upper seal layer 11 and the lower seal layer 12, and the particle size of the regenerated mineral aggregate particles of the upper seal layer 11 is smaller than that of the regenerated mineral aggregate particles of the lower seal layer 12, the regenerated mineral aggregate particles with different particle sizes can be fully utilized, and the secondary utilization rate of the regenerated mineral aggregate particles is improved.
In one embodiment, the regenerated mineral aggregate particles of the upper sealing layer 11 are embedded in the gaps between the regenerated mineral aggregate particles of the lower sealing layer 12 to form an embedded structure, so that the regenerated mineral aggregate particles are more compact and distributed more tightly, the structural strength of the crushed stone sealing layer 1 is higher, better crack resistance and durability are achieved, and the gaps between the regenerated mineral aggregate particles of the lower sealing layer 12 are filled, thereby being beneficial to preventing rain and snow erosion and enhancing the protection of the original pavement 200.
In a specific embodiment, the asphalt cement layer of the chip seal layer 1 is laid in two steps. When constructing the open seal layer structure based on the recycled mineral aggregate, firstly, treating diseases such as pits, cracks and the like of the original pavement 200, then, carrying out first paving of the asphalt cement layer of the crushed stone seal layer 1 on the original pavement 200, then, paving recycled mineral aggregate particles of the lower seal layer 12 on the asphalt cement layer of the crushed stone seal layer 1, embedding the recycled mineral aggregate particles of the lower seal layer 12 into the asphalt cement layer of the crushed stone seal layer 1, then, carrying out second paving of the asphalt cement layer of the crushed stone seal layer 1 on the lower seal layer 12, finally, paving recycled mineral aggregate particles of the upper seal layer 11 on the asphalt cement layer of the crushed stone seal layer 1, and embedding the recycled mineral aggregate particles of the upper seal layer 11 into the gaps among the recycled mineral aggregate particles of the lower seal layer 12, thereby completing paving of the crushed stone seal layer 1.
Optionally, the asphalt cement layer is a rubber asphalt layer or a modified emulsified asphalt layer.
It should be noted that the asphalt in the asphalt cement layer is allowed to originate from old asphalt, but because the amount of old asphalt is limited and most of the old asphalt exists in the reclaimed mineral aggregate particles having a smaller particle size, the asphalt in the asphalt cement layer is allowed to originate from new asphalt, not limited to old asphalt.
In one embodiment, the size of the reclaimed mineral particles of the upper seal layer 11 is 4.75-9.5mm.
Further, since the particle size of the reclaimed mineral particles of the lower seal layer 12 is larger than that of the reclaimed mineral particles of the upper seal layer 11, the particle size of the reclaimed mineral particles of the lower seal layer 12 may be 9.5 to 16mm.
In one embodiment, the particle size of the reclaimed mineral particles of the under-seal layer 12 is 9.5-13.2mm or 13.2-16mm. When the original road surface 200 has less disease repair and the traffic load grade is medium or light traffic load grade, the particle size of the regenerated mineral aggregate particles of the lower seal layer 12 can be 9.5-13.2mm; when the original road surface 200 has more disease repair and the traffic load grade is heavy traffic or above, the particle size of the regenerated mineral aggregate particles of the lower sealing layer 12 can be 13.2-16mm so as to improve the bearing capacity of the road surface.
In one embodiment, the particle size of the regenerated mineral aggregate particles adopted by the micro-surfacing layer 2 is 0-9.5mm, and the regenerated mineral aggregate particles specifically comprise multi-grade mineral aggregates with particle sizes ranging from 0-2.36mm, 2.36-4.75mm, 4.75-7.2mm, 7.2-9.5mm and the like. Wherein the mineral aggregate with the particle size of 4.75-7.2mm and the mineral aggregate with the particle size of 7.2-9.5mm are further sieved. Because the particle size of the mineral aggregate particles needed by the micro-surfacing layer 2 is smaller, and the lower sealing layer 12 consumes a large amount of regenerated mineral aggregate particles with larger particle size, the regenerated mineral aggregate particles with smaller particle size are fully utilized by setting the particle size of the regenerated mineral aggregate adopted by the micro-surfacing layer 2 to be 0-9.5mm, and the more old asphalt contained in the regenerated mineral aggregate particles with smaller particle size, the asphalt requirement of the micro-surfacing layer 2 is met by adopting the regenerated mineral aggregate particles with smaller particle size, the requirement for new asphalt is reduced, and the cost is saved.
It should be noted that a regenerant may be added to the old asphalt of layer 2 at the micro-surfacing to help restore asphalt properties.
Wherein, the micro-surfacing is a preventive maintenance method developed on the basis of a slurry seal. The working principle is that stone dust or sand with a certain grading, filler (cement, lime, fly ash, stone powder, etc.), polymer modified emulsified asphalt, external admixture and water are mixed according to a certain proportion to prepare a flowing mixture, and then uniformly spread on the sealing layer of the road surface. The micro surface (microsurface) can be divided into a type II and a type III according to the mineral aggregate collection, and the micro surface is respectively represented by MS-2 and MS-3, and the nominal maximum particle size of the MS-3 micro surface is 9.5mm.
In one embodiment, the micro-surfacing layer 2 is an MS-3 type micro-surfacing layer.
In one embodiment, the thickness of the chip seal layer 1 is 15-25mm.
The construction of an open seal layer structure based on recycled mineral aggregate is described in detail below in the following specific examples.
Example 1:
the micro-surfacing layer 2 is an MS-3 type micro-surfacing layer, the upper sealing layer 11 is a regenerated mineral material layer with the particle size of 4.75-9.5mm of regenerated mineral material particles, the lower sealing layer 12 is a regenerated mineral material layer with the particle size of 9.5-13.2mm of regenerated mineral material particles, and the asphalt cement layer is a rubber asphalt layer.
Example 2:
the micro-surfacing layer 2 is an MS-3 type micro-surfacing layer, the upper sealing layer 11 is a regenerated mineral aggregate layer with the particle size of 4.75-9.5mm of regenerated mineral aggregate particles, the lower sealing layer 12 is a regenerated mineral aggregate layer with the particle size of 9.5-13.2mm of regenerated mineral aggregate particles, and the asphalt cement layer is a modified emulsified asphalt layer.
Both examples 1 and 2 can be used in the case where the original road surface 200 has less damage repair and the traffic load level is a medium or light traffic load level. The rubber asphalt has strong adhesive force, but has certain pollution to the environment and is easily affected by temperature when in use; the modified emulsified asphalt needs maintenance time, but is less affected by temperature, and has less pollution to the environment, and the rubber asphalt layer and the modified emulsified asphalt layer have advantages and disadvantages and can be selected according to actual conditions.
Example 3:
the micro-surfacing layer 2 is an MS-3 type micro-surfacing layer, the upper sealing layer 11 is a regenerated mineral aggregate layer with the particle size of 4.75-9.5mm of regenerated mineral aggregate particles, the lower sealing layer 12 is a regenerated mineral aggregate layer with the particle size of 13.2-16mm of regenerated mineral aggregate particles, and the asphalt cement layer is a rubber asphalt layer.
Example 4:
the micro-surfacing layer 2 is an MS-3 type micro-surfacing layer, the upper sealing layer 11 is a regenerated mineral aggregate layer with the particle size of 4.75-9.5mm of regenerated mineral aggregate particles, the lower sealing layer 12 is a regenerated mineral aggregate layer with the particle size of 13.2-16mm of regenerated mineral aggregate particles, and the asphalt cement layer is a modified emulsified asphalt layer.
Both the embodiment 3 and the embodiment 4 can be used for repairing more diseases of the original road surface 200, and the rubber asphalt layer and the modified emulsified asphalt layer can be selected according to actual conditions when the traffic load grade is heavy traffic or above.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (9)
1. An open seal layer structure based on recycled mineral aggregate, comprising:
a macadam seal layer paved on an original road surface;
the micro-surfacing layer is paved on the crushed stone seal layer, and the micro-surfacing layer and the crushed stone seal layer are both regenerated mineral layers;
the regenerated mineral aggregate layer comprises tiled regenerated mineral aggregate particles and an asphalt cement layer bonded with the regenerated mineral aggregate particles, and the regenerated mineral aggregate particles are embedded in the asphalt cement layer.
2. The recycled mineral aggregate-based open seal structure of claim 1, wherein the crushed stone seal comprises an upper seal layer and a lower seal layer, the upper seal layer being laid over the lower seal layer, the recycled mineral aggregate particles of the upper seal layer having a smaller particle size than the recycled mineral aggregate particles of the lower seal layer.
3. The open seal structure based on reclaimed mineral of claim 2 wherein the reclaimed mineral particles of the upper seal are embedded within the interstices of the reclaimed mineral particles of the lower seal with respect to each other.
4. The open seal layer structure based on reclaimed mineral aggregate of claim 1, wherein the asphalt cement layer is a rubber asphalt layer or a modified emulsified asphalt layer.
5. The open seal structure based on reclaimed mineral of claim 2 wherein the reclaimed mineral particles of the top seal have a particle size of 4.75-9.5mm.
6. The open seal structure based on reclaimed mineral of claim 2 wherein the reclaimed mineral particles of the under seal have a particle size of 9.5-16mm.
7. The open seal structure based on reclaimed mineral of claim 6 wherein the reclaimed mineral particles of the under seal have a particle size of 9.5-13.2mm or 13.2-16mm.
8. The open seal layer structure based on reclaimed mineral of claim 1 wherein the reclaimed mineral particles of the micro-surfacing layer have a particle size of 0-9.5mm.
9. The open seal structure based on reclaimed mineral aggregate of claim 1, wherein the crushed stone seal has a thickness of 15-25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320261898.2U CN219670984U (en) | 2023-02-07 | 2023-02-07 | Open seal layer structure based on regenerated mineral aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320261898.2U CN219670984U (en) | 2023-02-07 | 2023-02-07 | Open seal layer structure based on regenerated mineral aggregate |
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| Publication Number | Publication Date |
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| CN219670984U true CN219670984U (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320261898.2U Active CN219670984U (en) | 2023-02-07 | 2023-02-07 | Open seal layer structure based on regenerated mineral aggregate |
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| Country | Link |
|---|---|
| CN (1) | CN219670984U (en) |
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2023
- 2023-02-07 CN CN202320261898.2U patent/CN219670984U/en active Active
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