CN109499662A - A kind of concrete recovery device - Google Patents
A kind of concrete recovery device Download PDFInfo
- Publication number
- CN109499662A CN109499662A CN201811351866.1A CN201811351866A CN109499662A CN 109499662 A CN109499662 A CN 109499662A CN 201811351866 A CN201811351866 A CN 201811351866A CN 109499662 A CN109499662 A CN 109499662A
- Authority
- CN
- China
- Prior art keywords
- concrete
- pedestal
- recovery device
- sedimentation basin
- rolled plate
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/14—Stamping mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/02—Codes relating to disintegrating devices adapted for specific materials for reinforced concrete
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of concrete recovery device, including for placing waste pedestal, be set on the base bracket, the rolled plate above pedestal and the driving mechanism on bracket and rolled plate being driven to move in the vertical direction is set；The pedestal is connected with sedimentation basin；The sedimentation basin is communicated with screw lift.The beneficial effects of the present invention are: the present invention can be handled the solid wastes such as concrete, building board, it crushes the structures such as concrete, plate and is separated with metal material, so as to carry out classification recycling to metal, concrete, timber, plastic or other material respectively, and it can also realize the recycling to concrete, this programme has the advantages that easy to use, use cost is low, can efficiently separate a variety of different waste materials.
Description
Technical field
The present invention relates to building waste process fields, are a kind of concrete recovery devices specifically.
Background technique
Construction waste can by sources be divided into soil excavation, road excavation, the dismounting of old building, construction and building materials
Produce this five classifications of rubbish.From the point of view of the becoming of construction waste, specifically include that concrete, mortar, tile, metal, timber,
Brick, plastics and some sundries and organic matter.
For the existing construction area in China up to 60,000,000,000 square metres, annual construction waste discharge amount is about 15.5~2,400,000,000
Ton, construction waste have become the second largest solid refuse in city.In architectural process, concrete is most important construction material, and is given birth to
Producing 1m3 concrete about needs the sandstone of 1700~2000kg.As it can be seen that needing a large amount of sandstone to provide in the production process of concrete
Source.And China, sand and stone resources will face exhausted crisis, and the luck tendency energy consumption and expense exploited are quite high, and are exploiting
While will cause the destruction of green vegetation, cause soil erosion, seriously destroy ecological environment.Furthermore in its production process,
Will output CO2, SO2, NOx, this not only exacerbates greenhouse effects, also results in the generation of acid rain, harms the crops and vegetation.
Then land used is nervous for the development of urbanization, the sharp increase of population, thus towering new building will eliminate it is short just
House and concrete structure.Therefore all there can be a large amount of building that will be removed or be transformed and renovate every year.
The waste material that building generates at present essentially directly transports suburban area to and rural area carries out air storage, fills or burn
It burns, thus consumes a large amount of waste material and clear expense and land acquisition expense, and occupy a large amount of arable land.It generates during transport
Fugitive dust and the harmful substance for burning generation can generate pollution to surrounding enviroment, and but will be to the soil in landfill area or incineration area
Generate destructive serious pollution.And then generate a succession of environmental problem will be more sharp.
Protection and effective use angle from resource say that the research that construction waste recycles has important social benefit,
More there is important influence to the existence of the mankind.The development and reuse of construction waste is worked together for still greater successes in, waste material can be re-used for
In construction, the expense of its transport and processing can be not only saved, the occupancy to farmland, and the destruction to environment are more reduced, from
And save resource.
In Japan, national territorial area natively very little, and also resource is relatively deficient, and therefore, they attach great importance to building waste
Utilization.Early in 1977, Japanese government just formulated " regenerated aggregate and regenerated aggregate concrete use regulation ", and establishes
To handle the processing factory based on concrete waste material, recycled cement and recycled aggregate are produced.1991, Japanese government formulated again
" resource re-using promotion law " " construction wastes such as dregs, concrete, pitch, timber, metal in regulation building construction process
It must be sent to and be handled " in recycling facility ".
7 building skyscrapers of the second construction engineering corporation of Shanghai City in intown " Huating " and " Huo Lan " two engineerings
In work progress, construction waste that the structure construction stage is generated by sorting, reject and useful waste residue fragment crushed after,
In the ratio mix of 1:1 it is fine aggregate with normal sand, is used for plastering mortar and masonry mortar, intensity can reach 5MPa or more.
And the project recycles 480 tons of construction waste in total.It closes peaceful highway to be open to traffic in 1991, overall length 133.43km, water
The problem of cement concrete road surface, increasingly increase due to the volume of traffic and its service life, concrete road surface occurs in various degree
The problem of, and in maintenance process, replace natural aggregate to be configured to again using discarded Shanghai and Nanjing figure recycled aggregate on the spot and nearby
Growing concrete, wherein the utilization rate of discarded concrete is as high as 80%, saves the freight of aggregate up to 117~1,300,000 yuan, saves
Save 67~750,000 yuan of concrete land occupation expense.
Although the country has part advanced enterprises and group to set about beginning one's study for the utilization of construction waste, also obtain
Certain achievement.But still there is improved space in China in this link of the recovery processing of building waste.
So far there is also some nonstandard construction, cause to occur in architectural process it is some use inferior materials and turn out substandard goods, cause
Some engineering accidents out, not only affect the security of the lives and property of people, and the generation of construction waste is also increase accordingly.
The recycling of construction waste is the process flow of a more system, professional extremely strong.However have these conditions
Majority be individual advanced enterprises, some medium-sized and small enterprises also will continue to continue to use old due to itself not having a technology
Construction process so that the generation of construction waste is not eased, construction waste utilization rate is still low.
Construction waste itself does not have any value, it must could to assign it again new by recycling and reprocessing
Value.Then construction waste recycles the capital investment for needing early period, for the large enterprises of the macro thickness of fund, or burden
Must rise, but relative to some medium-sized and small enterprises, their funds it is not abundant, limited to their investments to the project.Again
Person, its cost of reconstituted product manufactured by construction waste are generally greater than the manufacture product of new raw material, this can usually make recycling again
Profitless using enterprise, this is undoubtedly the strike again that construction waste utilizes, and construction waste has been strangled to recycle again
Possibility.
Although China also gradually issues relevant laws and regulations, the regulation that the specification of national standard grade recycles construction waste at present
Not comprehensive enough, also the only part special economic zone guidance specification that has more detailed construction waste to recycle, fails to well
Popularize other areas.If instructed without explicitly standardizing, for implementing to recycle this project just more difficult, even if
It implements, it is likely that some problems can be caused: as the incomplete processing of factory, so that the exhaust-gas treatment in process
It is improper and processing after final product quality be worth than expected it is low, for this risk, it will more enterprises is allowed to hang back.
Summary of the invention
The purpose of the present invention is to provide a kind of concrete recovery devices, for being returned after crushing building waste
It receives and utilizes, improve material utilization, reduce environmental pollution.
The present invention is achieved through the following technical solutions: a kind of concrete recovery device, including for placing waste
Pedestal, the bracket being set on the base, the rolled plate above pedestal and setting are on bracket and drive rolled plate vertically
The mobile driving mechanism in direction；The pedestal is connected with sedimentation basin；The sedimentation basin is communicated with screw lift.We
Case can be handled the solid wastes such as concrete, building board, mobile to realize using driving mechanism driving rolled plate
It pressurizes and is crushed solid waste, thus crush the structures such as concrete, plate and separated with metal material, it can after separation
It drives broken solid fraction to be moved in sedimentation basin using water flow, floats the particles such as timber, plastics on the water surface, make to mix
Solidifying broken sand material of soil etc., which is deposited in sedimentation basin, forms mud, and biggish bar construction can not be crushed also can not be by water flow
It takes away and stays in above pedestal, can be realized the separation of metal, concrete, timber, plastics with this.Utilize screw lift energy
It is enough that mud is taken out from sedimentation basin and is oriented to blender and is recycled.
Isolation board is provided on the pedestal；The opening being connected to sedimentation basin is offered on the isolation board；It is described
Isolation board on be provided with water inlet pipe, the water inlet pipe is located at the side opposite with being open.It can be prevented using isolation board solid
Body waste material splashes during pressurization because of stress, to avoid the occurrence of safety accident, and can play the work of drainage
With control water flow is mobile towards sedimentation basin and avoids liquid leakage.Water flow is guided on pedestal using water inlet pipe, so that this
Scheme is more convenient to use, is conducive to reduce labor intensity, and be easy to implement automatic control.
The filter layer being provided in the sedimentation basin below screw lift.It is convenient for making mud using filter layer
With liquid layered, thus in the mud for avoiding screw lift from taking away include excessive moisture.
The sedimentation basin is communicated with outlet pipe；The outlet pipe is located at below filter layer.Being convenient for this will be extra
Moisture exports sedimentation basin.
The outlet pipe is communicated with circulating pump, and the circulating pump is connected to water inlet pipe.Using circulating pump, water can be made
The concrete of circulation scouring crushing is flowed, water resource is recycled to realize.
The lower surface of the rolled plate be provided with several protrusion roll block.The pressure born with this convenient for enhancing waste material
Broken efficiency is improved by force, and can be the metal structures reserved spaces such as reinforcing bar using the spacing rolled between block, is avoided
Rolled plate directly contacts with metal structure and reduces broken useful space range.
The block that rolls is truncated cone-shaped or hemispherical.With this be conducive to protection roll block using safe, extension rolls
The service life of block, and can play the role of improving crushing efficiency.
Electromagnet is provided in the rolled plate；The rolled plate is made of permeability magnetic material.Utilize electromagnet energy
The magnetic metal configuration in particle is enough adsorbed, to make magnetic metal be separated and improve the efficiency of separation.
Isolated column is provided between the sedimentation basin and pedestal.With this convenient for intercepting larger-size particle, avoid not
Broken particle is taken away by water flow completely, to advantageously ensure that broken efficiency.
Compared with prior art, the present invention have the following advantages that and the utility model has the advantages that
The present invention can be handled the solid wastes such as concrete, building board, make the structures such as concrete, plate crush and with
Metal material separation, so as to carry out classification recycling to metal, concrete, timber, plastic or other material respectively, and can also
Realize the recycling to concrete, this programme has the advantages that easy to use, use cost is low, can efficiently separate various
Different waste materials.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of this programme；
Fig. 2 is the structural schematic diagram of embodiment 6；
Fig. 3 is the structural schematic diagram of embodiment 8；
Fig. 4 is the structural schematic diagram of embodiment 5；
Wherein 1- pedestal, 2- bracket, 3- rolled plate, 4- hydraulic cylinder, 5- isolation board, 6- filter layer, 7- sedimentation basin, 8- water inlet pipe,
9- rolls block, 10- electromagnet, 11- screw lift, 12- outlet pipe, 13- circulating pump.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment 1:
As Figure 1-Figure 4, in the present embodiment, a kind of concrete recovery device, including for placing waste pedestal 1,
Bracket 2 on pedestal 1, the rolled plate 3 above pedestal 1 are set and is arranged on bracket 2 and drives rolled plate 3 vertically
The mobile driving mechanism in direction；The pedestal 1 is connected with sedimentation basin 7；The sedimentation basin 7 is communicated with screw lift
11。
The building solids waste materials such as discarded concrete structure, discarded plate are placed on pedestal 1, driving mechanism is used
It drives rolled plate 3 mobile to pedestal 1, to press using rolled plate 3 to building solid waste material, keeps building solid waste material broken,
The structures such as plank, plastic plate are separated by pressure breaking and with metal structures such as its internal screws, and concrete structure is broken by pressure
It is broken and separated with metal structures such as its internal reinforcing bars.After broken, using the impact of water flow, by the structures band such as plastics, timber
It walks and the tiny gravel etc. that concrete structure obtains after broken is taken away and entered in sedimentation basin 7, the structures such as plastics, timber
It keeps afloat since density ratio water is small, the structures such as gravel are deposited on 7 bottom of sedimentation basin because density ratio water is big, are realized with this
Different materials is separated.Since plastics are different from the density of timber, and the density of plastics is generally greater than the density of timber,
The density for increasing water flow and adding solvent into water flow is close to the density with plastics, so that in sedimentation basin 7
Plastics can float on a liquid layer, can be by plastics and wood seperation with this.
The mud mixed after concrete disintegrating with water can be shifted using screw lift 11, by spiral
Hoisting mechanism 11 is connected to blender, and mud can be transferred in blender, mixes the materials such as mud and new cement
It closes to realize recycling.In the present embodiment, the screw lift 11 be those skilled in the art common knowledge with
And customary means, those skilled in the art can be realized said effect according to the content that this programme is recorded, do not mention herein to spiral
The specific structure and working principle for rising mechanism 11 are repeated.
In the present embodiment, rolled plate 3 is driven using hydraulic cylinder 4, is provided on the pedestal 1 and rolled plate 3 is propped up
The support construction of support and guiding is to improve the usage safety performance of rolled plate 3, and in the present embodiment, the support construction is ability
The customary means of field technique personnel, those skilled in the art can be realized said effect according to the content that this programme is recorded, herein
The specific structure of support construction and working principle are not repeated.
Pass through the solvent of addition meta-alkalescence in the water flow, additionally it is possible to remove the subsidiary greasy dirt of material itself.Such as add
Add sodium bicarbonate.
Embodiment 2:
On the basis of the above embodiments, in the present embodiment, isolation board 5 is provided on the pedestal 1；The isolation board 5
On offer the opening being connected to sedimentation basin 7；Be provided with water inlet pipe 8 on the isolation board 5, the water inlet pipe 8 be located at
Be open opposite side.It can prevent solid waste from splashing during pressurization because of stress using isolation board 5, to keep away
Exempt from safety accident occur, and drainage can be played the role of, control water flow is mobile towards sedimentation basin and avoids liquid leakage.Benefit
Water flow is guided on pedestal 1 with water inlet pipe 8, so that this programme is more convenient to use, is conducive to reduce labor intensity, and
It is easy to implement automatic control.The flow of water is controlled on the water inlet pipe 8 by setting pressure regulator valve, consequently facilitating control water flow
The solid fraction for the maximum particle diameter that can be taken away stays in more large-sized particle on pedestal 1 and in subsequent shattering process
It crushes, consequently facilitating obtaining the particle with unified partial size and being convenient for subsequent recycling.In the present embodiment, other are not described
Part it is identical as the content of above-described embodiment, therefore do not repeat.
Embodiment 3:
On the basis of the above embodiments, it in the present embodiment, is provided under screw lift 11 in the sedimentation basin 7
The filter layer 6 of side.Concrete particle can be intercepted using filter layer 6, only water flow is allowed to pass through, thus make mud and liquid layered,
Comprising excessive moisture in mud to avoid screw lift 11 from taking away.In the present embodiment, other parts not described
It is identical as the content of above-described embodiment, therefore do not repeat.
Embodiment 4:
On the basis of the above embodiments, in the present embodiment, the sedimentation basin 7 is communicated with outlet pipe 12；The outlet pipe
12 are located at 6 lower section of filter layer.It is convenient for extra moisture exporting sedimentation basin 7 with this.In the present embodiment, other parts not described
It is identical as the content of above-described embodiment, therefore do not repeat.
Embodiment 5:
As shown in figure 4, on the basis of the above embodiments, in the present embodiment, the outlet pipe 12 is communicated with circulating pump 13, institute
The circulating pump 13 stated is connected to water inlet pipe 8.Using circulating pump 13, water circulation can be made to wash away the concrete of crushing, thus real
Now water resource is recycled.
Embodiment 6:
As shown in Fig. 2, on the basis of the above embodiments, in the present embodiment, the lower surface of the rolled plate 3 is provided with several
A protrusion rolls block 9.With this during rolled plate 3 is mobile, make to roll block 9 and first contacted with waste material, to increase waste material
The pressure that bears in unit area and improve broken efficiency, and can be the gold such as reinforcing bar using the spacing rolled between block 9
Belong to structure reserved space, rolled plate 3 is avoided directly to contact with metal structure and reduce broken useful space range.This implementation
In example, other parts not described are identical as the content of above-described embodiment, therefore do not repeat.
Embodiment 7:
On the basis of the above embodiments, in the present embodiment, the block 9 that rolls is truncated cone-shaped or hemispherical.Truncated cone-shaped or half
Spherical outer surface is inclined-plane, when rolling the metal structures such as block 9 and reinforcing bar and contacting, using roll block 9 extruding can general, steel
The metal structures such as muscle squeeze to the both sides for rolling block 9 and the metal structures such as reinforcing bar are avoided directly to bear pressure, and to rolled plate 3
Decline, which is formed, to be hindered.It can play the role of improving crushing efficiency with this.And the corner angle rolled on block 9 can be reduced, prevented
The edges and corners for rolling block 9 contact with other objects and are crushed, thus be conducive to protection roll block 9 using safe, extension rolls
The service life of block 9.In the present embodiment, other parts not described are identical as the content of above-described embodiment, therefore do not repeat.
Embodiment 8:
As shown in figure 3, on the basis of the above embodiments, in the present embodiment, being provided with electromagnet 10 in the rolled plate 3；
The rolled plate 3 is made of permeability magnetic material.The magnetic metal configuration in particle can be adsorbed using electromagnet 10, to make
Magnetic metal is separated and is improved the efficiency of separation.In the present embodiment, the electromagnet is those skilled in the art's
Customary means, the content combination common knowledge that those skilled in the art record according to this programme can be realized said effect, herein
Electromagnet specific structure and working principle are not repeated.In the present embodiment, other parts not described and above-described embodiment
Content it is identical, therefore do not repeat.
Embodiment 9:
On the basis of the above embodiments, in the present embodiment, isolated column is provided between the sedimentation basin 7 and pedestal 1.It is described
Isolated column on be provided with several gaps.With this convenient for intercepting the particle that size is greater than gap width, avoid not being crushed completely
Particle taken away by water flow, to advantageously ensure that broken efficiency.In the present embodiment, other parts not described and above-mentioned reality
The content for applying example is identical, therefore does not repeat.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit any simple modification to the above embodiments of the invention, equivalent variations, protection of the invention is each fallen within
Within the scope of.
Claims (9)
1. a kind of concrete recovery device, it is characterised in that: including for placing waste pedestal (1), be arranged in pedestal
(1) bracket (2) on, the rolled plate (3) above pedestal (1) and setting are on bracket (2) and driving rolled plate (3) is along perpendicular
The driving mechanism mobile to direction；The pedestal (1) is connected with sedimentation basin (7)；The sedimentation basin (7) is communicated with spiral and mentions
It rises mechanism (11).
2. a kind of concrete recovery device according to claim 1, it is characterised in that: set on the pedestal (1)
It is equipped with isolation board (5)；The opening being connected to sedimentation basin (7) is offered on the isolation board (5)；On the isolation board (5)
It is provided with water inlet pipe (8), the water inlet pipe (8) is located at the side opposite with being open.
3. a kind of concrete recovery device according to claim 2, it is characterised in that: in the sedimentation basin (7)
It is provided with the filter layer (6) being located at below screw lift (11).
4. a kind of concrete recovery device according to claim 3, it is characterised in that: the sedimentation basin (7) is even
It is connected with outlet pipe (12)；The outlet pipe (12) is located at below filter layer (6).
5. a kind of concrete recovery device according to claim 4, it is characterised in that: the outlet pipe (12) is even
It is connected with circulating pump (13), the circulating pump (13) is connected to water inlet pipe (8).
6. a kind of according to claim 1, concrete recovery device described in any one of 2,3,4,5, it is characterised in that: institute
The lower surface for the rolled plate (3) stated be provided with several protrusion roll block (9).
7. a kind of concrete recovery device according to claim 6, it is characterised in that: the block (9) that rolls is
Truncated cone-shaped or hemispherical.
8. a kind of concrete recovery device according to claim 7, it is characterised in that: in the rolled plate (3)
It is provided with electromagnet (10)；The rolled plate (3) is made of permeability magnetic material.
9. according to claim 1, a kind of concrete recovery device described in any one of 2,3,4,5,7,8, feature exist
In: isolated column is provided between the sedimentation basin (7) and pedestal (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811351866.1A CN109499662A (en) | 2018-11-14 | 2018-11-14 | A kind of concrete recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811351866.1A CN109499662A (en) | 2018-11-14 | 2018-11-14 | A kind of concrete recovery device |
Publications (1)
| Publication Number | Publication Date |
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| CN109499662A true CN109499662A (en) | 2019-03-22 |
Family
ID=65748410
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811351866.1A Pending CN109499662A (en) | 2018-11-14 | 2018-11-14 | A kind of concrete recovery device |
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| CN (1) | CN109499662A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303596A (en) * | 2019-07-09 | 2019-10-08 | 李厚兵 | One kind being based on fluid dynamic new concrete recyclable device |
| CN111495472A (en) * | 2020-05-06 | 2020-08-07 | 肖景雄 | Broken block concrete crusher |
| CN111760615A (en) * | 2020-07-14 | 2020-10-13 | 山东科技大学 | Particle size adjustable concrete aggregate is broken and automatic device of empting |
| CN113351337A (en) * | 2021-06-16 | 2021-09-07 | 河南格内格工程管理有限公司 | Municipal works building rubbish reducing mechanism on spot |
| CN116011997A (en) * | 2023-01-03 | 2023-04-25 | 中交二航局建筑科技有限公司 | High-quality recycling method for old concrete structure |
-
2018
- 2018-11-14 CN CN201811351866.1A patent/CN109499662A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303596A (en) * | 2019-07-09 | 2019-10-08 | 李厚兵 | One kind being based on fluid dynamic new concrete recyclable device |
| CN110303596B (en) * | 2019-07-09 | 2020-12-11 | 四川宏业商品混凝土有限公司 | Novel concrete recovery device based on fluid dynamics |
| CN111495472A (en) * | 2020-05-06 | 2020-08-07 | 肖景雄 | Broken block concrete crusher |
| CN111495472B (en) * | 2020-05-06 | 2021-08-31 | 山东铭德港城机械有限公司 | Broken block concrete crusher |
| CN111760615A (en) * | 2020-07-14 | 2020-10-13 | 山东科技大学 | Particle size adjustable concrete aggregate is broken and automatic device of empting |
| CN113351337A (en) * | 2021-06-16 | 2021-09-07 | 河南格内格工程管理有限公司 | Municipal works building rubbish reducing mechanism on spot |
| CN116011997A (en) * | 2023-01-03 | 2023-04-25 | 中交二航局建筑科技有限公司 | High-quality recycling method for old concrete structure |
| CN116011997B (en) * | 2023-01-03 | 2024-01-26 | 中交二航局建筑科技有限公司 | High-quality recycling method for old concrete structure |
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