CN219434474U - Preparation device for large-particle-size cement stabilized macadam test piece - Google Patents
Preparation device for large-particle-size cement stabilized macadam test piece Download PDFInfo
- Publication number
- CN219434474U CN219434474U CN202320787427.5U CN202320787427U CN219434474U CN 219434474 U CN219434474 U CN 219434474U CN 202320787427 U CN202320787427 U CN 202320787427U CN 219434474 U CN219434474 U CN 219434474U
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- sleeve
- ring
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- test piece
- particle
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- 238000012360 testing method Methods 0.000 title claims abstract description 79
- 239000004568 cement Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000007790 scraping Methods 0.000 claims description 50
- 239000002245 particle Substances 0.000 claims description 16
- 238000000227 grinding Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 40
- 238000000034 method Methods 0.000 abstract description 13
- 239000010410 layer Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 238000005056 compaction Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application belongs to the technical field of cement concrete tests, a large-particle-size cement stabilized macadam test piece preparation device is disclosed, including the examination mould and set up the sleeve in the examination mould, be provided with on the sleeve and scrape and smash the subassembly, scrape and smash the subassembly including setting up in the sleeve scrape smash the ring, scrape the L shape connecting rod fixed at ring top with interior, set up in the examination mould and sleeve between scrape smash the ring and scrape the montant fixed at ring top with the outer, the montant upper end is fixed with the horizontal part of L shape connecting rod, the length of montant is greater than telescopic height. This application is when filling the mixture in the test die, and it is inside to place the sleeve in the test die, and sleeve outside fills the thin mixture of part, and the sleeve is inside to be filled remaining mixture, avoids a plurality of big clearances to appear on the fashioned test piece surface of current method, avoids loosening, coming off.
Description
Technical Field
The utility model relates to the technical field of cement concrete tests, in particular to a preparation device for a large-particle-size cement stabilized macadam test piece.
Background
After the cement stabilized macadam base layer finishes paving and rolling, shrinkage cracks can possibly occur due to dry shrinkage and temperature shrinkage during maintenance, the cracks are very easy to widen and lengthen through repeated actions of loads such as vehicles, temperature and the like, and further spread to the surface layer to become reflection cracks, so that the strength and rigidity of the base layer are reduced, the service life of the pavement is reduced, and the whole pavement structure can be damaged under the worse condition. Compared with the conventional cement stabilized macadam with the particle size, the cement stabilized macadam with the super-large particle size has the advantages that the coarse aggregates are better mutually embedded and extruded, and the cracking resistance of the cement stabilized macadam with the super-large particle size is more outstanding.
For the ultra-large-particle-size cement stabilized macadam, in order to verify the performance superiority, an indoor test is needed to be carried out, and a large-particle-size cement stabilized macadam test piece is prepared, wherein the size of the test piece is phi 200mm multiplied by 160mm. The preparation process of the existing ultra-large particle size cement stabilized macadam test piece comprises the following steps: according to the calculated grading, collecting aggregates of different grades according to the corresponding weight and cement of calculated dosage, putting the aggregates into a tray, adding water of calculated dosage, and fully stirring. The cushion blocks are used for filling up the test molds, the negative films are placed in the test molds, then the test molds are filled, coarse and fine aggregate is uniformly filled in the process of filling, and meanwhile, a spatula or a vibrating rod is used for tamping along the walls of each test mold, so that the test pieces can not be molded, and meanwhile, segregation is prevented. After filling, using a vibration compaction instrument to control the mass of the boarding and alighting, the compaction height, the compaction frequency and the compaction time, and finally forming a test piece.
Because the ultra-large-particle-size cement stabilized macadam technology system is still immature, most of test procedures imitate cement stabilized macadam with conventional particle size. In actual operation, the aggregate with the maximum particle size reaches 53mm, so that the compactness cannot be well controlled during vibration, large gaps are easy to appear, and after the aggregate with the maximum particle size is blocked by the aggregate with the large particle size, the fine aggregate cannot fill the gaps. Especially at test piece side, the contact of large-grain size aggregate and test die inner wall can't be avoided, after the contact, the downside space can't be filled to the fine aggregate, and the test piece side after the shaping has a plurality of large spaces, and large-grain size collection exposes moreover, and loose droing is very easy in the drawing of patterns maintenance. The total weight of the large-particle-size test mould and aggregate can reach 20 kg, so that the test mould is difficult to carry, collision is difficult to avoid, and the loose falling situation can be further aggravated, and even the test mould is scattered. There is also a great adverse effect on the performance test performed later. Therefore, the test piece preparing device can be improved for the above-mentioned cases to improve the test accuracy and efficiency.
Disclosure of Invention
In order to solve the problems, the utility model provides a preparation device for a large-particle-size cement stabilized macadam test piece.
The technical aim of the utility model is realized by the following technical scheme: the utility model provides a rubble test piece preparation facilities is stabilized to big particle diameter cement, includes the examination mould and sets up the sleeve in the examination mould, be provided with on the sleeve and scrape and smash the subassembly, scrape and smash the subassembly including setting up in the sleeve and scrape smash the ring, scrape the fixed L shape connecting rod in ring top with interior, set up in the examination mould and sleeve between scrape smash the ring and scrape the fixed montant in ring top with the outer, the montant upper end is fixed with the horizontal part of L shape connecting rod, the length of montant is greater than telescopic height.
Through adopting above-mentioned technical scheme, when filling the mixture towards the examination mould, place the sleeve in the examination mould inside, sleeve and examination mould edge distance keep basic unanimity, the horizontal part through L shape connecting rod is lifted and is scraped the ring of pounding in, under the effect of montant, the outer ring of pounding of scraping is also lifted, make the ring of pounding and scrape the ring outward, in the sleeve outside, the examination mould inboard loads the mixture in the inside of sleeve, the bottom loads the partial mixture in the sleeve, guarantee that the downside surface is basically smooth, the space does not appear, the large-particle diameter collection exposes does not appear, evenly load the large-particle diameter mixture in the sleeve inside afterwards, inside and outside packing height need keep unanimous basically. In the process of filling the mixture, the inner scraping tamping ring and the outer scraping tamping ring are used for tamping, the mixture filling at the edge and dead angle is ensured, and meanwhile, the mixture is fully compacted by matching with the vibrating rod. After the mixture is filled each time and tamped by the tamping device, the inner tamping ring and the outer tamping ring are lifted to contact the cylinder ring, so that the mixture is prevented from being clamped by the tamping ring during filling.
Further, a cylinder ring is integrally formed on the outer wall of the sleeve close to the upper end of the sleeve.
Through adopting above-mentioned technical scheme, the section of thick bamboo circle has played good limiting displacement to scraping outward and has been scraped the probability that the ring was followed sleeve top roll-off to scraping outward to the tamping ring outward, the staff is through L shape connecting rod, utilizes in scraping tamping ring, scrapes the mixture that tamping ring tamps the packing outward.
Further, the sleeve coincides with the axis of the test die, the distance between the end part of the horizontal part of the L-shaped connecting rod and the axis of the sleeve is greater than the distance between the outer wall of the test die and the axis of the sleeve, and one end, far away from the axis of the sleeve, of the L-shaped connecting rod is fixed with a gripper.
By adopting the technical scheme, a worker can hold and push the inner scraping tamping ring and the outer scraping tamping ring up and down through the handles, so that the tamping operation of the mixed material is realized.
Further, the thickness of the outer scraping and tamping ring is equal to that of the inner scraping and tamping ring, and the bottom surface of the outer scraping and tamping ring is flush with the bottom surface of the inner scraping and tamping ring.
By adopting the technical scheme, the filling heights inside and outside the sleeve are required to be basically kept consistent.
Further, a sand grinding layer is arranged on the side wall of the gripper.
Through adopting above-mentioned technical scheme, the setting of dull polish layer has strengthened experience sense and frictional force in-process of staff's grasp tongs.
Further, be provided with on the sleeve and be used for with the fixed subassembly of examination mould, fixed subassembly includes L shape locating lever and runs through set up on the barrel circle and with barrel circle clearance fit's bolt, examination mould top offered with L shape locating lever vertical portion grafting complex spliced eye, bolt tip and L shape locating lever's horizontal part threaded connection.
Through adopting above-mentioned technical scheme, the bolt passes a section of thick bamboo circle and with the horizontal part threaded connection of L shape locating lever, the vertical portion and the spliced eye grafting of L shape locating lever for the relative position between sleeve and the examination mould can be fixed, with this fine mixture thickness that makes between sleeve and the examination mould keeps unanimous, is favorable to improving the accuracy in the follow-up test process of test piece.
Further, two annular rubber sheets are sleeved on the bolt, and the annular rubber sheets are respectively positioned on two sides of the cylinder ring.
Through adopting above-mentioned technical scheme, annular sheet rubber adopts rubber material to make, has good elasticity performance, and two annular sheet rubber cooperation have played good guard action to the section of thick bamboo circle, have reduced the scratch effect that fixed subassembly produced the section of thick bamboo circle.
In summary, the utility model has the following beneficial effects:
1. according to the preparation device for the cement stabilized macadam test piece with the super-large particle size, when the mixture is filled into the test mold, the sleeve is placed in the test mold, part of the fine mixture is filled outside the sleeve, and the rest mixture is filled in the sleeve, so that a plurality of large gaps are avoided on the surface of the test piece molded by the existing method, and loosening and falling are avoided;
2. in the application, the cylinder ring plays a good limiting role on the external scraping and tamping ring, so that the probability that the external scraping and tamping ring slides out from the top of the sleeve is reduced, and a worker can tamp the filled mixture by using the internal scraping and tamping ring and the external scraping and tamping ring through the L-shaped connecting rod;
3. in the method, the bolt penetrates through the barrel ring and is in threaded connection with the horizontal part of the L-shaped positioning rod, and the vertical part of the L-shaped positioning rod is spliced with the splicing hole, so that the relative position between the sleeve and the test die is fixed, the thickness of the fine mixture between the sleeve and the test die is kept consistent, and the accuracy of a test piece in the subsequent test process is improved;
4. according to the preparation device for the cement stabilized macadam test piece with the ultra-large particle size, after filling is finished, the sleeve is drawn out, the scraping device can scrape the mixture remained on the inner wall and the outer wall of the sleeve, so that excessive loss is avoided, the filled mixture is prevented from being drawn out when the sleeve is drawn out, the sleeve can be cleaned in an auxiliary mode after the test is finished, and the scraping function is highlighted. Meanwhile, the integrated structure avoids the problems that the separate placement difficulty of the tamping device is high and the tamping device is easy to damage.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the structure of FIG. 1 after the test mold is removed;
FIG. 3 is a schematic view of a scraping assembly according to an embodiment of the present utility model;
FIG. 4 is a cross-sectional view of an embodiment of the present utility model for highlighting a tamper assembly;
fig. 5 is an enlarged schematic view at a in fig. 4.
In the figure: 1. testing a mold; 11. a plug hole; 2. a sleeve; 3. scraping and tamping components; 31. an inner scraping ring; 32. an L-shaped connecting rod; 33. an outer scraping ring; 34. a vertical rod; 4. a fixing assembly; 41. an L-shaped positioning rod; 42. a bolt; 5. a barrel ring; 6. a grip; 7. grinding the sand layer; 8. annular rubber sheet.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; it is apparent that the described embodiments are only a part of the embodiments of the present application, not all of the embodiments, and all other embodiments obtained by a person having ordinary skill in the art without making creative efforts based on the embodiments in the present application are within the scope of protection of the present application.
As shown in fig. 1-5, the embodiment of the application discloses a preparation device for a large-grain-size cement stabilized macadam test piece, which comprises a test die 1, a sleeve 2, a scraping and tamping assembly 3 and a fixing assembly 4. The cross section of the test die 1 and the cross section of the sleeve 2 are circular, the sleeve 2 is arranged in the test die 1, and two ends of the sleeve 2 are open.
The scraping and tamping assembly 3 is arranged on the sleeve 2, and the scraping and tamping assembly 3 comprises an inner scraping and tamping ring 31, an L-shaped connecting rod 32, an outer scraping and tamping ring 33 and a vertical rod 34. The inner scraping and tamping ring 31 is of a circular plate-shaped structure, the axis of the inner scraping and tamping ring is coincident with the axis of the sleeve 2, and the inner scraping and tamping ring 31 is arranged in the sleeve 2. The L-shaped connecting rod 32 is of an L-shaped rod-shaped structure, and the lower end of the vertical part of the L-shaped connecting rod is fixed with the top of the inner scraping ring 31. The outer scraping and tamping ring 33 is also of a circular annular plate-shaped structure, the axis of the circular annular plate-shaped structure coincides with that of the sleeve 2, the outer scraping and tamping ring 33 is arranged between the test die 1 and the sleeve 2, the vertical rod 34 is of a vertically arranged circular rod-shaped structure, the upper end of the vertical rod 34 is fixed with the horizontal part of the L-shaped connecting rod 32, and the length of the vertical rod 34 is larger than the height of the sleeve 2. In this embodiment, the thickness of the outer tamper ring 33 is equal to the thickness of the inner tamper ring 31, and the bottom surface of the outer tamper ring 33 is flush with the bottom surface of the inner tamper ring 31. The sleeve 2 coincides with the axis of the test mould 1, the distance between the horizontal part end of the L-shaped connecting rod 32 and the axis of the sleeve 2 is greater than the distance between the outer wall of the test mould 1 and the axis of the sleeve 2, and one end of the L-shaped connecting rod 32 far away from the axis of the sleeve 2 is fixed with a gripper 6.
When the mixture is filled into the test mould 1, the sleeve 2 is placed in the test mould 1, the edge distance between the sleeve 2 and the edge of the test mould 1 is kept basically consistent, the inner scraping and tamping ring 31 is lifted by the grip 6, the outer scraping and tamping ring 33 is lifted under the action of the vertical rod 34, the inner scraping and tamping ring 31 and the outer scraping and tamping ring 33 are enabled to be filled with the mixture outside the sleeve 2 and inside the test mould 1, the lowermost part of the mixture is filled in the sleeve 2, the surface of the lower side is basically smooth, gaps are avoided, large-particle-size material collection is avoided, the mixture with large particle size is uniformly filled in the sleeve 2, and the inner filling height and the outer filling height are basically consistent. In the process of filling the mixture, the inner scraping and tamping ring 31 and the outer scraping and tamping ring 33 are used for tamping, the mixture filling at the edge and dead angle is ensured, and meanwhile, the mixture is fully compacted by matching with the vibrating rod. After each filling of the mixture is tamped by the tamping device, the inner tamping ring 31 and the outer tamping ring 33 are lifted to contact the barrel ring 5, so that the mixture is prevented from being clamped by the tamping rings during filling.
In order to reduce the probability that the outer scraping ring 33 is separated from the upper end of the sleeve 2, a barrel ring 5 is integrally formed on the outer wall of the sleeve 2 near the upper end of the sleeve. For the experience sense of reinforcing staff's gripping tongs 6 in-process, be provided with frosted layer 7 on the tongs 6 lateral wall, the setting of frosted layer 7 has strengthened experience sense and frictional force of staff's gripping tongs 6 in-process. The fixing component 4 is arranged on the sleeve 2 and used for fixing the sleeve 2 and the test die 1, and the fixing component 4 comprises an L-shaped positioning rod 41 and a bolt 42. The L-shaped positioning rod 41 is of an L-shaped round rod-shaped structure, and the top of the test die 1 is provided with a plugging hole 11 which is plugged and matched with the vertical part of the L-shaped positioning rod 41. The bolt 42 is penetrated and arranged on the cylinder ring 5 and is in clearance fit with the cylinder ring 5, and the end of the bolt 42 is in threaded connection with the horizontal part of the L-shaped positioning rod 41. The bolt 42 passes through the barrel ring 5 and is in threaded connection with the horizontal part of the L-shaped positioning rod 41, and the vertical part of the L-shaped positioning rod 41 is spliced with the splicing hole 11, so that the relative position between the sleeve 2 and the test die 1 is fixed, the thickness of the fine mixture between the sleeve 2 and the test die 1 is kept consistent, and the accuracy of a test piece in the subsequent test process is improved.
In order to enhance the protection effect on the barrel ring 5, two annular rubber sheets 8 are sleeved on the bolts 42, and the annular rubber sheets 8 are respectively positioned at two sides of the barrel ring 5. The annular rubber sheets 8 are made of rubber materials, have good elastic performance, and the two annular rubber sheets 8 cooperate to play a good role in protecting the cylindrical ring 5, so that the scratch effect of the fixing assembly 4 on the cylindrical ring 5 is reduced.
The application principle of the preparation device for the large-particle-size cement stabilized macadam test piece in the embodiment is as follows: when the mixture is filled into the test mould 1, the sleeve 2 is placed in the test mould 1, the edge distance between the sleeve 2 and the edge of the test mould 1 is kept basically consistent, the inner scraping and tamping ring 31 is lifted by the grip 6, the outer scraping and tamping ring 33 is lifted under the action of the vertical rod 34, the inner scraping and tamping ring 31 and the outer scraping and tamping ring 33 are enabled to be filled with the mixture outside the sleeve 2 and inside the test mould 1, the lowermost part of the mixture is filled in the sleeve 2, the surface of the lower side is basically smooth, gaps are avoided, large-particle-size material collection is avoided, the mixture with large particle size is uniformly filled in the sleeve 2, and the inner filling height and the outer filling height are basically consistent. In the process of filling the mixture, the inner scraping and tamping ring 31 and the outer scraping and tamping ring 33 are used for tamping, the mixture filling at the edge and dead angle is ensured, and meanwhile, the mixture is fully compacted by matching with the vibrating rod. After each filling of the mixture is tamped by the tamping device, the inner tamping ring 31 and the outer tamping ring 33 are lifted to contact the barrel ring 5, so that the mixture is prevented from being clamped by the tamping rings during filling.
The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (7)
1. A preparation device for a large-particle-size cement stabilized macadam test piece is characterized in that: including examination mould (1) and set up sleeve (2) in examination mould (1), be provided with on sleeve (2) and scrape and smash subassembly (3), scrape and smash subassembly (3) including setting up in sleeve (2) in scrape smash ring (31), scrape fixed L shape connecting rod (32) in smash ring (31) top, set up in the outside between examination mould (1) and sleeve (2) scrape smash ring (33) top fixed montant (34) outward, montant (34) upper end is fixed with the horizontal part of L shape connecting rod (32), the length of montant (34) is greater than the height of sleeve (2).
2. The preparation device of the large-particle-size cement stabilized macadam test piece according to claim 1, which is characterized in that: a cylinder ring (5) is integrally formed on the outer wall of the sleeve (2) close to the upper end of the sleeve.
3. The large-particle-size cement stabilized macadam test piece preparation device according to claim 2, characterized in that: the utility model discloses a test device, including sleeve (2) and sleeve (2), the axis coincidence of sleeve (2) and test die (1), the distance between horizontal portion tip and sleeve (2) axis of L shape connecting rod (32) is greater than the distance between outer wall of test die (1) and sleeve (2) axis, just the one end that sleeve (2) axis was kept away from to L shape connecting rod (32) is fixed with tongs (6).
4. A large particle size cement stabilized macadam test piece preparation device as claimed in claim 3, wherein: the thickness of the outer scraping and tamping ring (33) is equal to that of the inner scraping and tamping ring (31), and the bottom surface of the outer scraping and tamping ring (33) is flush with the bottom surface of the inner scraping and tamping ring (31).
5. The preparation device for the large-particle-size cement stabilized macadam test piece according to claim 4, which is characterized in that: and a sand grinding layer (7) is arranged on the side wall of the gripper (6).
6. The preparation device for the large-particle-size cement stabilized macadam test piece according to claim 4, which is characterized in that: be provided with on sleeve (2) be used for with test die (1) fixed subassembly (4), fixed subassembly (4) include L shape locating lever (41) and run through set up on barrel circle (5) and with barrel circle (5) clearance fit's bolt (42), test die (1) top offer with L shape locating lever (41) vertical portion grafting complex spliced eye (11), bolt (42) tip and L shape locating lever (41) horizontal part threaded connection.
7. The preparation device of the large-particle-size cement stabilized macadam test piece according to claim 6, which is characterized in that: two annular rubber sheets (8) are sleeved on the bolts (42), and the annular rubber sheets (8) are respectively positioned at two sides of the cylinder ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320787427.5U CN219434474U (en) | 2023-04-10 | 2023-04-10 | Preparation device for large-particle-size cement stabilized macadam test piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320787427.5U CN219434474U (en) | 2023-04-10 | 2023-04-10 | Preparation device for large-particle-size cement stabilized macadam test piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219434474U true CN219434474U (en) | 2023-07-28 |
Family
ID=87340506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320787427.5U Active CN219434474U (en) | 2023-04-10 | 2023-04-10 | Preparation device for large-particle-size cement stabilized macadam test piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219434474U (en) |
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2023
- 2023-04-10 CN CN202320787427.5U patent/CN219434474U/en active Active
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Address after: 835099 Room 201, Floor 2, Transportation Bureau of Ili Kazakh Autonomous Prefecture, No. 1 Yihe Street, Xinjiang Patentee after: Ili Transportation Investment Group Co.,Ltd. Patentee after: Xinjiang transportation planning, survey, design and Research Institute Co.,Ltd. Patentee after: CHANG'AN University Address before: 835099 Room 201, Floor 2, Transportation Bureau of Ili Kazakh Autonomous Prefecture, No. 1 Yihe Street, Xinjiang Patentee before: Ili Transportation Investment Group Co.,Ltd. Patentee before: Xinjiang transportation planning Survey, Design and Research Institute Co.,Ltd. Patentee before: CHANG'AN University |