CN114471323A - Device for preparing recycled aggregate by crushing coarse aggregate and modifying construction waste - Google Patents
Device for preparing recycled aggregate by crushing coarse aggregate and modifying construction waste Download PDFInfo
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- CN114471323A CN114471323A CN202210092821.7A CN202210092821A CN114471323A CN 114471323 A CN114471323 A CN 114471323A CN 202210092821 A CN202210092821 A CN 202210092821A CN 114471323 A CN114471323 A CN 114471323A
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- Prior art keywords
- stirring
- aggregate
- modifying
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
- C04B18/167—Recycled materials, i.e. waste materials reused in the production of the same materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a device for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste, which comprises a rack, a modifying device arranged on the rack and a drying device arranged on the lower side of the modifying device, wherein the modifying device comprises a drying device body and a drying device body; the modifying device comprises an aggregate stirring cabin arranged on the rack and a modified material preparation cabin arranged on the rack; a first stirring device is arranged in the aggregate stirring cabin and connected with a first driving device; a second stirring device is arranged in the modified material preparation cabin and connected with a second driving device; a booster pump is arranged on the lower side of the modified material preparation cabin, the inlet of the booster pump is communicated with the modified material preparation cabin, the outlet of the booster pump is provided with a spray head, the spray head is arranged in the aggregate stirring cabin, and the drying device comprises a cavity, a conveying device arranged in the cavity and a microwave drying device arranged on the cavity; the invention has the characteristics of reasonable design, effective reduction of the porosity of the coarse aggregate and improvement of the compactness of the coarse aggregate.
Description
Technical Field
The invention relates to a device for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste, belonging to the technical field of preparation equipment of road construction materials.
Background
Along with the acceleration of the urbanization process of China, the yield of construction waste generated by the removal, transformation and the like of old buildings is rapidly increased, and according to estimation, the total amount of the construction waste in China is about hundreds of millions of tons every year, and the amount of the untreated construction waste accumulated in China reaches hundreds of millions of tons every year. The construction waste has huge yield, not only occupies a large amount of land, but also pollutes the environment and influences the environmental sanitation. Reasonable disposal and utilization of the construction waste not only helps to avoid occupying valuable urban surrounding land and avoid secondary environmental pollution, but also can reduce the problems of exhaustion of non-renewable natural resources, water and soil loss, river channel damage and the like caused by exploitation of the gravel aggregate by replacing natural gravel aggregate, and has important development significance.
The recycled concrete aggregate is obtained by crushing, screening, cleaning and grading the waste raw concrete and mixing the waste raw concrete according to a certain proportion, compared with natural aggregate, the recycled aggregate is wrapped by adhesive mortar from original concrete slurry, the components of the adhesive mortar are complex, the adhesive mortar contains natural sand in cement stone, cement stone fragments, stone chips and mud generated in the crushing process of natural coarse aggregate and various impurities, the porosity and high water absorption of the adhesive mortar reduce the mechanical property and durability of the recycled aggregate concrete, mainly because the recycled aggregate has micro cracks in the crushing process, the particles contain mortar and cement paste, compared with natural aggregate, the recycled aggregate has the defects of high porosity, high water absorption, low strength grade and the like, and the recycled aggregate has a rough and multi-edge surface and increases the friction force with a mixture, so that the concrete made of the recycled aggregate has poor workability.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste, which has reasonable design, effectively reduces the porosity of the coarse aggregate and improves the compactness of the coarse aggregate.
In order to solve the technical problems, the invention adopts the technical scheme that:
a device for preparing recycled aggregate by crushing coarse aggregate and modifying construction waste comprises a rack, a modifying device arranged on the rack and a drying device arranged on the lower side of the modifying device;
the modifying device comprises an aggregate stirring cabin arranged on the rack and a modified material preparing cabin arranged on the rack;
a first stirring device is arranged in the aggregate stirring cabin and connected with a first driving device;
a second stirring device is arranged in the modified material preparation cabin and connected with a second driving device;
modified material prepares cabin downside and sets up the booster pump, the import of booster pump prepares the cabin intercommunication with modified material, the export of booster pump sets up the atomising head, the atomising head sets up in the aggregate stirring cabin.
Further, the drying device comprises a cavity, a conveying device arranged in the cavity and a microwave drying device arranged on the cavity;
the microwave drying device comprises a microwave drying cavity arranged in the middle section of the cavity and an equipment cavity arranged on the upper side of the microwave drying cavity, and a microwave generator is arranged in the equipment cavity.
Furthermore, a dehumidifying pipeline is arranged on the equipment cavity, and a dehumidifier is arranged in the dehumidifying pipeline.
Furthermore, the conveying device comprises a driving shaft arranged on one side of the cavity, a driven shaft arranged on the other side of the cavity and a conveying belt arranged between the driving shaft and the driven shaft, and the driving shaft is in transmission connection with a third driving device arranged on the cavity.
Furthermore, the first stirring device comprises a first stirring shaft connected with the first driving device, a first stirring blade mounting seat fixedly arranged on the first stirring shaft, and a first stirring blade arranged on the first stirring blade mounting seat.
Furthermore, a detachable scraper plate is arranged on the first stirring blade.
Furthermore, a lining plate is arranged on the inner wall of the aggregate stirring cabin.
Furthermore, the first driving device comprises a first driving motor, a speed reducer in transmission connection with the first driving motor, and a gear set connected with an output shaft of the speed reducer, and the gear set is in transmission connection with the first stirring shaft.
Furthermore, the first stirring device is more than one set.
Further, the second stirring device comprises a second stirring shaft and stirring blades arranged on the second stirring shaft.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
according to the invention, the coarse aggregate is fully infiltrated by the uniformly distributed modified solution in a mode of stirring and spraying the coarse aggregate, the modified slurry solution fully infiltrates into gaps of the coarse aggregate, sodium silicate in the modified solution reacts with cement hydration products on the surface of the coarse aggregate to generate calcium carbonate colloid, the generated calcium carbonate colloid effectively fills micro cracks of the coarse aggregate, the porosity of the regenerated coarse aggregate is effectively reduced, the compactness of the regenerated coarse aggregate is improved, the retarder in the modified solution ensures the full infiltration of the modified solution, the full infiltration of the modified solution can be ensured by adopting a mode of spraying and stirring, and the method is different from a conventional mode of improving the long-time soaking of the regenerated aggregate in a modifying mode, so that the operation time is reduced on the premise of ensuring the modifying effect, the resource consumption is reduced, and the processing cost is reduced.
The modified material preparation cabin prepares the modified material, and the modified material is prepared by weighing the silica fume, the polyether glycol, the sodium silicate, the retarder and the water according to the parts by weight to prepare a modified solution, fully stirring and mixing the raw materials in a modified material preparation cabin, spraying the coarse aggregate in an aggregate stirring cabin through a booster pump and a spray head after preparing a modified solution, in the spraying process, the first stirring device in the aggregate stirring cabin continuously stirs the coarse aggregate, so that the coarse aggregate is fully infiltrated by the uniformly distributed modified solution, the modified slurry solution fully infiltrates into gaps of the coarse aggregate, then conveying the coarse aggregate into a microwave drying cavity through a conveying belt, removing the generated water vapor by using a dehumidifying pipeline, quickly drying to obtain regenerated coarse aggregate, the drying device has the advantages of reasonable design, high drying rate, good energy-saving effect, high production efficiency and convenience for automatic control.
The first stirring blade is fixedly arranged on the first stirring shaft through the first stirring blade mounting seat, the first stirring blade is provided with the detachable scraper, the first stirring blade mounting seat can be subjected to angle design and adjustment according to actual needs, and when a part is damaged, only the damaged part needs to be replaced, so that the maintenance cost of equipment is greatly reduced, and the maintenance efficiency is improved.
The lining plates are arranged on the inner wall of the aggregate stirring cabin, more than one lining plate is arranged, and the lining plates are independently fixed on the cabin wall of the aggregate stirring cabin, so that when the aggregate stirring cabin is damaged, broken or bonded and cannot be cleaned after being used for a long time, only the damaged lining plates need to be independently replaced, the whole cabin wall does not need to be replaced, the maintenance cost is reduced, and the lining plates also form a very effective protection effect on the cabin wall.
The first stirring device is more than one set, preferably two sets, and the one-time processing amount of the two sets of stirring devices is doubled, so that the working efficiency is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the modification apparatus according to the present invention;
FIG. 3 is a schematic structural view of a first stirring device according to the present invention;
FIG. 4 is a schematic view of the discharge door of the present invention;
the device comprises a machine frame 1, an aggregate stirring cabin 2, a modified material preparing cabin 3, a modified material preparing cabin 4, a microwave drying cavity 5, an equipment cavity 6, a microwave generator 7, a dehumidifying pipeline 8, a dehumidifier 9, a driving shaft 10, a driven shaft 11, a conveying belt 12, a first stirring shaft 13, a first stirring blade mounting seat 14, a first stirring blade 15, a detachable scraper 16, a lining plate 17, a first driving motor 18, a speed reducer 19, a gear set 20, a third driving device 21, a fourth driving motor 22, a first chain wheel 23, a second chain wheel 24, a traction ring 25, a discharging door 26, a side plate 27, a sealing plate 28 and a discharging handle.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1-4, the embodiment provides a device for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste, which comprises a frame 1, a modifying device arranged on the frame 1, and a drying device arranged on the lower side of the modifying device; the modifying device comprises an aggregate stirring cabin 2 arranged on the rack 1 and a modified material preparing cabin 3 arranged on the rack 1; set up welt 16 on the inner wall of aggregate stirring cabin 2, welt 16 is more than one to it is fixed alone on the bulkhead of aggregate stirring cabin 2, when the circumstances such as damage, breakage or bonding can't be cleared up take place after long-time the use, only need to damage the welt 16 alone change can, need not to change whole bulkhead, reduced the maintenance cost, and the welt has also formed very effectual guard action to the bulkhead.
A first stirring device is arranged in the aggregate stirring cabin 2, more than one set of first stirring device is arranged, preferably two sets of first stirring devices are arranged, and the one-time processing amount of the two sets of stirring devices is doubled, so that the working efficiency is greatly improved, and the first stirring device is connected with a first driving device; the first driving device comprises a first driving motor 17, a speed reducer 18 in transmission connection with the first driving motor 17 and a gear set 19 connected with an output shaft of the speed reducer 18, the gear set 19 is in transmission connection with a first stirring shaft 12, the first stirring device comprises a first stirring shaft 12 connected with the first driving device, a first stirring blade mounting seat 13 fixedly arranged on the first stirring shaft 12 and a first stirring blade 14 arranged on the first stirring blade mounting seat 13, a detachable scraper 15 is arranged on the first stirring blade 14, the first stirring blade 14 is fixedly arranged on the first stirring shaft 12 through the first stirring blade mounting seat 13, the detachable scraper 15 is arranged on the first stirring blade 14, the first stirring blade mounting seat 13 can be designed and adjusted in angle according to actual needs, when a component is damaged, only the damaged parts need to be replaced, so that the maintenance cost of the equipment is greatly reduced, and the maintenance efficiency is improved.
Set up fourth driving motor 21 in the frame 1, still set up first sprocket 22 in the frame 1, the output shaft and the first sprocket 22 transmission cooperation setting of fourth driving motor 21, 1 top both sides of frame still set up second sprocket 23, first sprocket 22 and second sprocket 23 are connected through the transmission shaft transmission, the both sides that the cabin 3 was prepared to modified material set up the pulley, 1 both sides of frame set up with pulley complex spout, 3 both sides in the cabin were prepared to modified material set up the pull ring 24, the pull ring 24 is connected with the chain on the second sprocket 23, set up the constant head tank in the spout, prepare the cabin 3 and can go up and down according to actual need through the modified material of above-mentioned setting, and batching, maintenance process are more convenient, have reduced the inconvenience that high altitude construction brought to automatic level has been promoted.
A second stirring device is arranged in the modified material preparation cabin 3 and is connected with a second driving device; the second stirring device comprises a second stirring shaft and stirring blades arranged on the second stirring shaft, a booster pump is arranged on the lower side of the modified material preparation cabin 3, the inlet of the booster pump is communicated with the modified material preparation cabin 3, the outlet of the booster pump is provided with an atomizing head, the atomizing head is arranged in the aggregate stirring cabin 2, the modified material is prepared in the modified material preparation cabin 3, the modified material is weighed by the aid of silica fume, polyether polyol, sodium silicate, a retarder and water according to parts by weight to prepare a modified solution, the modified solution is fully stirred and mixed in the modified material preparation cabin 3, coarse aggregates in the aggregate stirring cabin 2 are sprayed by the aid of the booster pump and the atomizing head after the modified solution is prepared, the first stirring device in the aggregate stirring cabin 2 continuously stirs the coarse aggregates in the spraying process, the coarse aggregates are fully infiltrated by the uniformly distributed modified solution, and the modified slurry solution fully infiltrates into gaps of the coarse aggregates, the method is characterized in that the coarse aggregate is fully infiltrated by the uniformly distributed modified solution in a stirring and spraying mode, the modified slurry solution fully infiltrates into gaps of the coarse aggregate, sodium silicate in the modified solution and cement hydration products on the surface of the coarse aggregate react to generate calcium carbonate colloid, the generated calcium carbonate colloid effectively fills microcracks of the coarse aggregate, the porosity of the regenerated coarse aggregate is effectively reduced, the compactness of the regenerated coarse aggregate is improved, retarder in the modified solution ensures the full infiltration of the modified solution, the full infiltration of the modified solution can be ensured by adopting a spraying and stirring mode, the method is different from a conventional method for improving the long-time soaking of the regenerated aggregate in a modified mode, the operation time is reduced on the premise of ensuring the modification effect, the resource consumption is reduced, and the processing cost is reduced.
2 downside in aggregate stirring cabin sets up discharge door 25, discharge door 25 both sides are through the axle sleeve setting in aggregate stirring cabin 2, discharge door 25 include with the curb plate 26 of axle sleeve cooperation setting and with the shrouding 27 that 2 downside opening cooperations in aggregate stirring cabin set up, the radian size of shrouding 27 and the radian phase-match of aggregate stirring cabin 2, set up the handle 28 of unloading on the curb plate 26, after the stirring is accomplished, unload handle 28 through rotating and open discharge door 25, shrouding 27 rotates certain angle around the center of aggregate stirring cabin 2 and accomplishes opening of discharge door 25 promptly, and the coarse aggregate of even spraying and abundant infiltration falls into conveyer belt 11 on, carries out follow-up stoving operation, adopts the discharge door of this kind of design, opens in a flexible way, also can be at any time when aggregate stirring cabin 2 is full of material convenient opening and close as required.
Conveying the coarse aggregate into a microwave drying cavity 4 through a conveying belt 11, wherein the drying device comprises a cavity, a conveying device arranged in the cavity and a microwave drying device arranged on the cavity; conveyor is in including setting up at the driving shaft 9 of cavity one side, setting up driven shaft 10 and the setting of cavity opposite side conveyer belt 11 between driving shaft 9 and the driven shaft 10, driving shaft 9 is connected with the transmission of the third drive arrangement 20 that sets up on the cavity, microwave drying device is in including setting up microwave drying chamber 4 and the setting in the cavity middle section the equipment chamber 5 of 4 upsides in microwave drying chamber, set up microwave generator 6 in the equipment chamber 5, set up dehumidification pipeline 7 on the equipment chamber 5, set up dehumidifier 8 in the dehumidification pipeline 7, utilize dehumidification pipeline 7 to clear away the steam that produces, carry out the fast drying back, obtain regeneration coarse aggregate, its reasonable in design, drying rate is big, energy-conserving effectual, production efficiency is high and be convenient for automated control.
The specific using working process is as follows:
the collected construction waste is subjected to processes such as mechanical crushing, sorting separation, primary screening and the like to remove impurities such as metals, light substances and the like, then screening is carried out, coarse aggregates obtained by sorting are loaded into an aggregate stirring cabin 2, silica fume, polyether polyol, sodium silicate, retarder and water are weighed according to parts by weight to prepare a modified solution, the modified solution is fully stirred and mixed in a modified material preparation cabin 3, the coarse aggregates in the aggregate stirring cabin 2 are sprayed through a booster pump and a spray head after being prepared into the modified solution, a first stirring device in the aggregate stirring cabin is used for continuously stirring the coarse aggregates in the spraying process to ensure that the coarse aggregates are fully infiltrated by the uniformly distributed modified solution, the modified slurry solution fully permeates into gaps of the coarse aggregates, then the coarse aggregates are conveyed into a microwave drying cavity 4 through a conveyer belt 11, generated water vapor is removed by a moisture extraction pipeline 7 and is rapidly dried, the recycled coarse aggregate is obtained, and has the advantages of reasonable design, high drying rate, good energy-saving effect, high production efficiency and convenience for automatic control.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The device for preparing the recycled aggregate by modifying the crushed coarse aggregate of the construction waste is characterized by comprising a rack (1), a modifying device arranged on the rack (1) and a drying device arranged on the lower side of the modifying device;
the modifying device comprises an aggregate stirring cabin (2) arranged on the rack (1) and a modified material preparing cabin (3) arranged on the rack (1);
a first stirring device is arranged in the aggregate stirring cabin (2), and the first stirring device is connected with a first driving device;
a second stirring device is arranged in the modified material preparation cabin (3), and the second stirring device is connected with a second driving device;
modified material prepares cabin (3) downside and sets up the booster pump, the import of booster pump prepares cabin (3) intercommunication with modified material, the export of booster pump sets up the atomising head, the atomising head sets up in aggregate stirring cabin (2).
2. The device for preparing the recycled aggregate by modifying the crushed coarse aggregate of the construction waste according to claim 1, wherein the drying device comprises a cavity, a conveying device arranged inside the cavity and a microwave drying device arranged on the cavity;
the microwave drying device comprises a microwave drying cavity (4) arranged in the middle section of a cavity and an equipment cavity (5) arranged on the upper side of the microwave drying cavity (4), wherein a microwave generator (6) is arranged in the equipment cavity (5).
3. The apparatus for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste according to claim 2, wherein a dehumidifying pipeline (7) is arranged on the equipment chamber (5), and a dehumidifier (8) is arranged in the dehumidifying pipeline (7).
4. The device for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste according to claim 1, wherein the conveying device comprises a driving shaft (9) arranged on one side of the cavity, a driven shaft (10) arranged on the other side of the cavity and a conveying belt (11) arranged between the driving shaft (9) and the driven shaft (10), and the driving shaft (9) is in transmission connection with a third driving device (20) arranged on the cavity.
5. The device for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste according to claim 1, wherein the first stirring device comprises a first stirring shaft (12) connected with a first driving device, a first stirring blade mounting seat (13) fixedly arranged on the first stirring shaft (12), and a first stirring blade (14) arranged on the first stirring blade mounting seat (13).
6. The apparatus for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste according to claim 1, wherein the first stirring blade (14) is provided with a detachable scraper (15).
7. The device for preparing the recycled aggregate by modifying the crushed coarse aggregate of the construction waste as claimed in claim 1, wherein a lining plate (16) is arranged on the inner wall of the aggregate stirring cabin (2).
8. The device for preparing the recycled aggregate by modifying the crushed coarse aggregate of the construction waste as claimed in claim 1, wherein the first driving device comprises a first driving motor (17), a speed reducer (18) in transmission connection with the first driving motor (17), and a gear set (19) connected with an output shaft of the speed reducer (18), and the gear set (19) is in transmission connection with the first stirring shaft (12).
9. The apparatus for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste according to claim 8, wherein the first stirring device is more than one set.
10. The apparatus for preparing recycled aggregate by modifying crushed coarse aggregate of construction waste according to claim 1, wherein the second stirring device comprises a second stirring shaft and stirring blades arranged on the second stirring shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210092821.7A CN114471323A (en) | 2022-01-26 | 2022-01-26 | Device for preparing recycled aggregate by crushing coarse aggregate and modifying construction waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210092821.7A CN114471323A (en) | 2022-01-26 | 2022-01-26 | Device for preparing recycled aggregate by crushing coarse aggregate and modifying construction waste |
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| CN114471323A true CN114471323A (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210092821.7A Pending CN114471323A (en) | 2022-01-26 | 2022-01-26 | Device for preparing recycled aggregate by crushing coarse aggregate and modifying construction waste |
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| CN (1) | CN114471323A (en) |
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