CN113818316B - Road-mixing inorganic binder material distribution method and device - Google Patents
Road-mixing inorganic binder material distribution method and device Download PDFInfo
- Publication number
- CN113818316B CN113818316B CN202111205543.3A CN202111205543A CN113818316B CN 113818316 B CN113818316 B CN 113818316B CN 202111205543 A CN202111205543 A CN 202111205543A CN 113818316 B CN113818316 B CN 113818316B
- Authority
- CN
- China
- Prior art keywords
- section
- bottom plate
- inorganic binder
- road
- inorganic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- E01C19/46—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 and placing the materials, e.g. slurry seals
- E01C19/47—Hydraulic cement concrete mixers combined with distributing means specially adapted for road building
-
- 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
- E01C19/46—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 and placing the materials, e.g. slurry seals
- E01C19/47—Hydraulic cement concrete mixers combined with distributing means specially adapted for road building
- E01C19/475—Distributing means therefor, e.g. boom-and-bucket arrangements
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
A road-mixing inorganic binder material distribution method comprises the following steps: firstly, collecting and paving materials on a construction surface of a roadbed and leveling the materials, then respectively connecting discharge openings of a binding agent paving vehicle with feed openings of a plurality of distributing devices, simultaneously placing discharge openings of the distributing devices in the collecting materials, and paving inorganic binding agents in the collecting materials by using the distributing devices. Before construction, the outlet of the distributing device is arranged in the paved aggregate in advance, and the powdery inorganic binder is directly discharged into the aggregate through the closed channel, so that the dust raising phenomenon in the paving process and the stirring process is eliminated, and the pollution to the construction environment is avoided; after the powder and the aggregate are stirred, the visible inorganic binder conglomerate area smaller than 0.5 square meter does not exist on the surface of the cushion layer or the base layer, the uniform degree of the mass distribution of the inorganic binder is greatly improved, and the 7d unconfined compressive strength of the cushion layer or the base layer is improved by 3 percent.
Description
Technical Field
The invention belongs to the technical field of highway construction, and particularly relates to a method and a device for distributing road-mixing inorganic binder in highway construction.
Background
In the construction of road cushion or base course, inorganic binder (composed of cement, lime and other powdery inorganic binder and granular expansive soil or other types of aggregates) is often used, and the inorganic binder improves the performance of the aggregates to achieve the purposes of stabilizing the volume of the aggregates and generating strength. During road mixing construction, powdery inorganic binders such as cement, lime and the like are uniformly spread on the surface of the granular aggregate according to the proportion requirement, a certain amount of water is added through stirring equipment to uniformly mix and stir the granular aggregate, and then compaction and maintenance are carried out through rolling equipment. The addition amount of the powdery inorganic bonding agent is 3-5% in the construction, the virtual paving thickness (not rolling and flattening) of the inorganic bonding agent is 26cm, and the thickness after spreading and stirring the powdery inorganic bonding agent is preferably not more than 20 cm.
In the construction, firstly, the granular aggregate is flatly paved on the construction surface of a roadbed by a bulldozer, then, powdery inorganic bonding agents (such as cement, lime and the like) are uniformly paved on the aggregate (such as granular expansive soil) by a bonding agent paving vehicle, the cement paving vehicle is provided with a square carriage, the appearance of the cement paving vehicle is similar to that of a common truck, the carriage has a self-unloading function, the powdery inorganic bonding agents (such as cement, lime and the like) are stored in the square carriage, the bottom of the tail of the vehicle is provided with a discharge opening, a screw feeder which extends along the length direction of the discharge opening and has synchronous rotating speed and vehicle speed is arranged in the discharge opening, the powdery inorganic bonding agents (such as cement, lime and the like) are paved on the surface of the granular aggregate (expansive soil) by the screw feeder, then, the stirring vehicle is used for up and down stirring, so that the granular aggregate (expansive soil) and the powdery inorganic bonding agents (such as cement, lime and the like) are uniformly mixed, and then, a road roller is adopted for rolling, and after the rolling inspection is qualified, carrying out second paving and stirring construction, wherein the construction process is the same as that of the first paving and stirring construction.
The spreading method of the inorganic binder has the following defects:
1. in the spreading process, as the powdery inorganic bonding agent (cement, lime and the like) is directly spread on the surface of the granular aggregate, larger dust can be generated; during stirring, the stirring blades directly stir the surface powder, and the powder is easy to generate a large amount of dust, so that the two construction processes cause pollution to the construction environment and are not beneficial to civilized construction;
2. because the powdery binder (cement, lime and the like) is directly spread on the aggregate surface (namely, the uppermost layer), the powdery binder and the powdery binder are difficult to stir uniformly during stirring, the phenomenon of powder agglomeration is easy to occur, and the visible agglomeration area of the inorganic binder less than 0.5 square meter accounts for 0.3-0.5 percent on the surface of a cushion layer or a base layer with every square kilometer, so that the quality of the inorganic binder is uneven, the strength of the cushion layer or the base layer is reduced, and the service life of a road is shortened.
Disclosure of Invention
In order to solve the above-mentioned disadvantages, the present invention provides a method and a device for distributing an inorganic binder for road mixing, which change the spreading mode of the existing inorganic binder, and spread the inorganic binder among the aggregates to form a structure (similar to a "sandwich" bread or sandwich biscuit structure) in which granular aggregates wrap the powdery binder, so as to effectively solve the problem of dust emission of the powdery binder during spreading and stirring, and since the inorganic binder is uniformly spread among the aggregates, the powder and the aggregates are easily mixed and stirred uniformly.
The purpose of the invention is realized by adopting the following technical scheme. According to the road-mixing inorganic binder material distribution method and device provided by the invention, the material distribution method comprises the following steps: firstly, collecting and paving materials on a construction surface of a roadbed and leveling the materials, then respectively connecting discharge openings of a binding agent paving vehicle with feed openings of a plurality of distributing devices, simultaneously placing discharge openings of the distributing devices in the interior of the collected materials, and paving inorganic binding agents in the interior of the collected materials by using the distributing devices;
the material distribution device comprises a bottom plate and a cover plate which are oppositely arranged, a channel for inorganic bonding agent to pass through is formed between the cover plate and the bottom plate, two sides of the bottom plate are respectively provided with a guard plate for preventing the inorganic bonding agent from falling off, the bottom plate comprises a tapered section, a transition section and an expansion section which are sequentially connected from top to bottom, the tapered section, the transition section and the expansion section are all obliquely arranged and are positioned in the same plane, a feed inlet is formed between the top of the tapered section and the top of the cover plate, the width of the section of the tapered section is gradually narrowed from top to bottom so as to be convenient for receiving the inorganic bonding agent, the width of the section of the expansion section is gradually widened from top to bottom so as to improve the moving speed of the inorganic bonding agent, and the bottom end of the expansion section is bent towards one side where the cover plate is positioned so as to form a horizontal extension section; the bottom plate is also provided with a plurality of flow guide pieces for guiding the inorganic bonding agent in the sliding process of the inorganic bonding agent, and the flow guide pieces in every two adjacent rows are distributed in a crossed and staggered manner; thereby the length of apron bottom surpasss the baffle that prevents that the discharge gate from being blockked up by the aggregate that turns up at inorganic binder in-process of paving after the length of extension section is turned down to form.
Preferably, the guard plate is formed by bending the edge of the bottom plate upwards, and the guard plate and the bottom plate are of an integral structure.
Preferably, one side of the bottom plate, which is far away from the cover plate, is also provided with a plowshare for dispersing the aggregate, and the plowshare is a triangular pyramid.
Preferably, the flow guide part is in an inverted V shape.
Preferably, the bottom plate and the cover plate are of a split structure, and the cover plate covers the bottom plate.
According to the material distributing method, before construction, the outlet of the material distributing device is placed in the paved aggregate in advance, the powdery inorganic binding agent is directly discharged into the aggregate through the closed channel, the dust emission phenomenon in the paving and scattering process and the subsequent stirring process is eliminated, the pollution to the construction environment is further avoided, and civilized construction is facilitated.
After the material distribution method provided by the invention is constructed, the paved powdery inorganic binder is positioned in the granular aggregate, and after the granular aggregate and the inorganic binder are stirred by a stirring vehicle, the visible inorganic binder conglomerate area smaller than 0.5 square meter does not exist on the surface of the cushion layer or the base layer, so that the uniform degree of the mass distribution of the inorganic binder is greatly improved, the 7d unconfined compressive strength of the cushion layer or the base layer is further improved by 3 percent (on the premise of no change of the material mixing ratio), and the service life of the highway is prolonged.
The foregoing is a summary of the present invention, and for the purpose of making the technical means of the present invention more comprehensible, embodiments thereof are described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a road-mixing inorganic binder distributing device (without a cover plate) according to the present invention.
Fig. 2 is a cross-sectional view taken at a-a in fig. 1.
Fig. 3 is a rear view of a road-mixing inorganic binder distribution device according to the present invention.
Fig. 4 is a schematic view of a state of use of the road mixing inorganic binder distribution device of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description will be given to the embodiments, structures, features and effects of a road-mixing inorganic binder distribution device according to the present invention with reference to the accompanying drawings and preferred examples.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 4, the road mixing inorganic bonding agent distributing device of the embodiment includes a bottom plate 1 and a cover plate 5 disposed on the bottom plate 1, a channel for passing a powdery inorganic bonding agent (hereinafter referred to as "powder") to be spread is formed between the cover plate 5 and the bottom plate 1, the cover plate 5 can prevent the powder from being lifted in the spreading process, the cover plate 5 and the bottom plate 1 are integrated, in other embodiments of the invention, the cover plate 5 and the bottom plate 1 may also be a split structure, and the cover plate 5 may be mounted on the bottom plate 1 by a buckle, a bolt, or other means.
Referring to fig. 1, the bottom plate 1 includes a tapered section 100, a transition section 101, and an expansion section 102 connected in sequence, the tapered section 100, the transition section 101, and the expansion section 102 are all arranged in an inclined manner and located in the same plane, a feed inlet 105 is formed between the top of the tapered section 100 and the top of the cover plate 5, and when powder flows in from the feed inlet 105, the powder moves downward in the channel between the bottom plate 1 and the cover plate 5 under the action of gravity.
The top end of the tapered section 100 is in a flaring shape, namely the width of the section of the tapered section 100 is gradually narrowed from top to bottom, and the flaring at the top of the tapered section 100 can facilitate receiving powder and prevent the powder from spilling;
the bottom of expansion section 102 enlarges to both sides gradually (that is expansion section 102's cross-sectional width top-down grow gradually), and expansion section 102 can be for the space that the powder increase that slides down from changeover portion 101 removed, improves the speed that the powder removed, prevents that the powder from blockking up in changeover portion 101 department, thereby expansion section 102's bottom forms extension section 103 to the lateral buckling at apron 5 place, and extension section 103 is the level form, and when using, extension section and ground parallel and level, when the powder that treats to pave by feed inlet 105 landing and remove to extension section 103, when distributing device moved forward under the drive of external drive arrangement simultaneously, the powder that treats to pave can evenly pave inside the aggregate that has paved on the construction face of road bed.
Referring to fig. 2, the two sides of the bottom plate 1 are both provided with the protection plates 2 for preventing powder from scattering, in this embodiment, the protection plates 2 are formed by bending the edge of the bottom plate 1 upwards, so that the protection plates 2 and the bottom plate 1 are an integral structure, of course, in other embodiments of the present invention, the bottom plate 2 is also a plate or other shape, and of course, in other embodiments of the present invention, the protection plates and the bottom plate 1 may be a separate structure.
The bottom plate 1 is also provided with a plurality of flow guide pieces 104 for guiding the powder in the powder sliding process, and the flow guide pieces 104 can uniformly disperse the powder and accelerate the powder sliding speed. The flow guide part 104 is in an inverted V shape, and powder firstly contacts with two outer surfaces of the flow guide part when sliding in the channel to disperse; the air guiding elements 104 in each two adjacent rows are distributed in a staggered manner, that is, the air guiding elements 104 are distributed above and below the gap between two adjacent air guiding elements 104 in each row, for example, a first air guiding element 1041 is arranged above the gap between the second air guiding element 1042 and the third air guiding element 1043, and a fourth air guiding element 1044 is arranged below the first air guiding element 1041.
Referring to fig. 3, a plurality of plowshare 106 are further disposed on a side of the bottom plate 1 away from the cover plate 5, each plowshare 106 is a triangular pyramid, a bottom surface of each plowshare 106 is mounted on a side of the expanding section 102 away from the flow guide member 104, one side surface of each plowshare 106 is flush with the ground, when the distributing device moves, the plowshares 106 can disperse the aggregates paved on the ground, so that resistance of the distributing device during movement is reduced, the distributing device moves forward conveniently, and in addition, the plowshares 106 can also turn up the aggregates paved on the construction surface of the roadbed, so that the powder to be paved can be mixed with the aggregates paved on the construction surface of the roadbed.
The top of apron 5 and the top parallel and level of bottom plate 1, the length of apron 5 bottom is greater than the length of extension section 103, thereby the bottom of apron 5 is buckled downwards and is formed baffle 501, has formed the discharge gate 6 that supplies the powder stream to flow out between the rear end of baffle 501 and extension section 103, and the powder is at the in-process that paves, and this baffle 501 can prevent to gather materials that have paved from stopping up discharge gate 6 after the turnover on the construction face of road bed and lead to the powder that waits to pave can not the landing.
Referring to fig. 4, taking the example of adding cement into the expansive soil layer 7, a plurality of distributing devices in this embodiment are arranged in parallel behind the cement spreading vehicle, so that the feed port 105 of the distributing device is communicated with the discharge port of the cement spreading vehicle, although in other embodiments of the present invention, the feed port and the discharge port may be connected in a flange manner, then the bottom of the distributing device is embedded into the expansive soil layer 7, even if the extension section 103 is embedded into the expansive soil layer 7, then the cement slides from the feed port 105 to the extension section 103 under the action of gravity, the cement spreading vehicle drives the distributing device to move, in the moving process, the expansion section 102 turns up the expansive soil located in the advancing direction of the distributing device and guides the expansive soil to two sides of the base plate 1, and the turned-up expansive soil falls on the cover plate 5. Because the length of apron 5 surpasss extension segment 103 and under the effect that blocks of baffle 501, the inflation soil that has turned up can not fall to discharge gate department and cause the discharge gate to block up, so when the distributing device continues to move forward, the inflation soil that falls on apron 5 when the distributing device moves forward, fall from apron 5 and mix with the cement that flows from discharge gate 6, treat this layer and pave the back that finishes, the degree of depth of adjustable distributing device embedding inflation soil, then pave again, the inflation soil that is up to whole road surface all with the cement stirring.
In the process that the expansive soil is turned up, if the turned-up expansive soil is accumulated on the front side of the movement of the bottom plate 1, a large resistance is generated to the movement of the distributing device in the embodiment, and the turned-up expansive soil is accumulated towards the two sides of the distributing device, so that a large gully is formed behind the distributing device after the distributing device moves over, in the embodiment, the width of the expanding section 102 is gradually narrowed from bottom to top, the side wall of the expanding section 102 plays a role in guiding the turned-up expansive soil, the turned-up expansive soil is guided to the intersection of the expanding section 102 and the transition section 101, and then the turned-up expansive soil falls onto the cover plate 5 along with the movement of the distributing device, the design not only can reduce the resistance of the distributing device during movement, but also can perfectly wrap the cover plate 5 without generating gully by adjusting the gradual increase rate of the width of the expanding section 102 from top to bottom, so that the turned-up expansive soil can fall onto the cover plate 5, thereby ensuring the smoothness of the expansive soil road surface doped with the cement and facilitating the rolling in the later period.
The distributing device disclosed by the invention is simple in structure and convenient to operate, and can avoid cement flying in the spreading process, so that the dust pollution is reduced; in addition, when the device is paved, the bottom of the device is embedded into an expansive soil layer, cement is uniformly paved inside the expansive soil, subsequent stirring is convenient, and the quality of the improved inorganic binder is improved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any simple modification, equivalent change and modification made by those skilled in the art according to the technical spirit of the present invention are still within the technical scope of the present invention without departing from the technical scope of the present invention.
Claims (5)
1. A road-mixing inorganic binding agent distributing method is characterized by comprising the following steps: firstly, collecting and paving materials on a construction surface of a roadbed and leveling the materials, then respectively connecting discharge openings of a binding agent paving vehicle with feed openings of a plurality of distributing devices, simultaneously placing discharge openings of the distributing devices in the interior of the collected materials, and paving inorganic binding agents in the interior of the collected materials by using the distributing devices;
the material distribution device comprises a bottom plate and a cover plate which are oppositely arranged, a channel for inorganic bonding agent to pass through is formed between the cover plate and the bottom plate, two sides of the bottom plate are respectively provided with a guard plate for preventing the inorganic bonding agent from falling off, the bottom plate comprises a tapered section, a transition section and an expansion section which are sequentially connected from top to bottom, the tapered section, the transition section and the expansion section are all obliquely arranged and are positioned in the same plane, a feed inlet is formed between the top of the tapered section and the top of the cover plate, the width of the section of the tapered section is gradually narrowed from top to bottom so as to be convenient for receiving the inorganic bonding agent, the width of the section of the expansion section is gradually widened from top to bottom so as to improve the moving speed of the inorganic bonding agent, and the bottom end of the expansion section is bent towards one side where the cover plate is positioned so as to form a horizontal extension section; the bottom plate is also provided with a plurality of diversion pieces for dredging the inorganic bonding agent in the sliding process of the inorganic bonding agent, and the diversion pieces in every two adjacent rows are distributed in a crossed and staggered manner; thereby the length of apron bottom surpasss the baffle that the length back of extension section was bent down and is prevented the discharge gate by the aggregate jam that turns up at inorganic binder spreading process.
2. The road-mixing inorganic binder material distribution method according to claim 1, characterized in that: the guard plate is formed by bending the edge of the bottom plate upwards, and the guard plate and the bottom plate are of an integral structure.
3. The road-mixing inorganic binder material distribution method according to claim 1, characterized in that: one side of the bottom plate far away from the cover plate is also provided with a plurality of plowshares which disperse the aggregate on the ground, and each plowshare is a triangular pyramid.
4. The road-mixing inorganic binder material distribution method according to claim 1, characterized in that: the diversion part is in an inverted V shape.
5. The road-mixing inorganic binder material distribution method according to claim 1, characterized in that: the bottom plate and the cover plate are of a split structure, and the cover plate covers the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111205543.3A CN113818316B (en) | 2021-10-15 | 2021-10-15 | Road-mixing inorganic binder material distribution method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111205543.3A CN113818316B (en) | 2021-10-15 | 2021-10-15 | Road-mixing inorganic binder material distribution method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113818316A CN113818316A (en) | 2021-12-21 |
| CN113818316B true CN113818316B (en) | 2022-09-09 |
Family
ID=78916848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111205543.3A Active CN113818316B (en) | 2021-10-15 | 2021-10-15 | Road-mixing inorganic binder material distribution method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113818316B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101287801A (en) * | 2005-09-12 | 2008-10-15 | Alm控股公司 | Bituminous paving composition and process for bituminous paving |
| CN101736672B (en) * | 2009-12-24 | 2012-01-11 | 重庆市智翔铺道技术工程有限公司 | Embedded pouring asphalt concrete |
| CN103243629B (en) * | 2012-02-03 | 2015-08-05 | 葛洲坝集团第一工程有限公司 | A kind of filling mouth for being in the milk |
| US9765487B2 (en) * | 2015-09-08 | 2017-09-19 | Baldwin Paving Co., Inc. | Systems for applying roadway surface treatments, and methods of using same |
| CN109914200A (en) * | 2019-03-21 | 2019-06-21 | 邹晓飞 | A kind of placing device for lime for road construction |
-
2021
- 2021-10-15 CN CN202111205543.3A patent/CN113818316B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113818316A (en) | 2021-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20070122235A1 (en) | Method for continuous on-site recycling of an asphalt mixture layer of a pavement and a motor-driven vehicle system therefor | |
| CN211772642U (en) | Asphalt paving device for highway construction | |
| CN108867274B (en) | Paver for paving concrete pavement | |
| CN113818316B (en) | Road-mixing inorganic binder material distribution method and device | |
| CN112144350A (en) | Unilateral curb concrete placement paves equipment for town road construction | |
| CN211947802U (en) | Highway maintenance rubble homogenization dispensing device | |
| CN214613439U (en) | Powdery material paving device | |
| JP3961452B2 (en) | Concrete spraying method | |
| CN211897734U (en) | Stone material scattering device of synchronous sealing layer vehicle | |
| CN103588381B (en) | A kind of method of visco-plasticity mud continuous uniform metering feed and device | |
| CN211472012U (en) | Signal lamp crossing filling type composite pavement | |
| CN114197279B (en) | Asphalt concrete pavement paving construction method | |
| CN209837250U (en) | Movable distributing device for concrete pouring of road side ditches | |
| CN115094698A (en) | Solidified building residue soil road structure in soft soil area and construction method | |
| CN208869915U (en) | A kind of simple trailing type pellet paver | |
| CN111910492A (en) | Pulling type cloth ash mixing integrated machine | |
| CN218621661U (en) | Large-particle-size water-permeability asphalt mixture spreading and distributing device | |
| CN214117555U (en) | Recycled concrete mortar paving device | |
| CN219793554U (en) | Road surface basic unit paver | |
| CN209779406U (en) | Sand stone material and regeneration fine aggregate premixed device | |
| CN109577149B (en) | Curb paver | |
| CN113152219B (en) | Construction method and flattening equipment for mixed filling roadbed | |
| EP0497755B1 (en) | Process for constructing a thin covering on groundsurfaces, especially on traffic areas | |
| CN219824829U (en) | Curb backrest pouring auxiliary device | |
| CN109811761B (en) | Mechanical device for desert control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |