CN102898086A - Preparation method of high-performance recycled aggregate concrete - Google Patents
Preparation method of high-performance recycled aggregate concrete Download PDFInfo
- Publication number
- CN102898086A CN102898086A CN2012104290733A CN201210429073A CN102898086A CN 102898086 A CN102898086 A CN 102898086A CN 2012104290733 A CN2012104290733 A CN 2012104290733A CN 201210429073 A CN201210429073 A CN 201210429073A CN 102898086 A CN102898086 A CN 102898086A
- Authority
- CN
- China
- Prior art keywords
- concrete
- sand
- particle diameter
- preparation
- high performance
- 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.)
- Granted
Links
Abstract
A preparation method of high-performance recycled aggregate concrete is characterized in that waste concrete is broken to obtain large stones with granularity of 20 to 25mm, small stones with granularity of 5 to 20mm and sand with granularity of smaller than 5mm, and dust produced in the breaking process is pneumatically collected; and then the large stones, the small stones and sand are mixed with polycarboxylic acid water reducing agent, cement and appropriate water to further obtain the high-performance recycled aggregate concrete. Against for the special situation of the waste concrete, the waste concrete is smashed and screened on purpose, so that a new concept for treating the waste concrete is provided, the problems such as worsening of engineering disasters, resource waste and environmental pollution can be avoided, and the performance of the recycled concrete is excellent.
Description
Technical field
The present invention relates to the concrete technology field, be specifically related to a kind of preparation method who utilizes the high performance concrete of regeneration aggregate preparation.
Background technology
At present, along with the quickening of urbanization process, society increases sharply to concrete demand.Obvious deficiency has appearred in the coarse-fine aggregate as the concrete important raw and processed materials.Therefore, technology that discarded concrete is recycled has also been proposed now.Prior art is that discarded concrete is broken, then utilizes roto-sifter to sieve, and obtains regeneration aggregate, adopts the mode dedusting of washing in order to remove fine powder, and it is very large that mud pollutes, and can't re-use in long-time.The coarse-fine aggregate that adopts this method to obtain, the mortar on Machine-made Sand and stone surface can't be removed at all, to such an extent as to the later stage when the preparation concrete, causes concrete performance greatly to reduce.
The sand and the stone that prepare with discarded concrete, on performance with the sand of natural formation and rubble gap to some extent, this just need to study for sand and the rubble of discarded concrete preparation, select suitable additive and addition, performance reaches even surpass the sand of natural formation and the concrete of common rubble preparation to prepare.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method of regeneration aggregate high performance concrete, thereby eliminates defective in the above-mentioned background technology.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of preparation method of regeneration aggregate high performance concrete, refer to discarded concrete is carried out break process, obtain particle diameter and be the large stone of 20～25mm, handstone that particle diameter is 5～20mm and particle diameter less than the sand of 5mm, and the dust that produces in the shattering process is carried out wind-force capture; Then will add polycarboxylate water-reducer, cement and an amount of water in large stone, handstone, the sand, and then make described regeneration aggregate high performance concrete.
As a kind of improvement, described large stone, handstone, sand, polycarboxylate water-reducer and weight of cement umber are sequentially 700～1100,250～350,650～850,7～14 and 200～400.
As a kind of further improvement, but admixture has the dust of 10～20 weight parts, described dust to refer to the dust that described wind-force captures in the described cement.
As a kind of improvement, described discarded concrete carries out break process, comprises the steps:
S1. discarded concrete is utilized jaw crusher to carry out fragmentation;
S2. the broken discarded concrete that obtains among the step S1 is entered impact breaker and carry out fragmentation;
S3. the broken discarded concrete that obtains among the step S2 being sent into the first sieve apparatus sieves, obtaining particle diameter is back to described impact breaker greater than the material of 25mm and continues broken, obtain particle diameter and be the large stone output storage of 20～25mm, obtain particle diameter and enter next step less than the material of 20mm;
S4. the particle diameter that obtains after the screening among the step S3 is sent into impact crusher less than the material of 20mm and carry out fragmentation, through the screening of the second sieve apparatus, obtain the rubble of 5～20mm and particle diameter less than sand 5mm, that particle is mellow and full;
S5. the sand that obtains among the step S4 is carried out the wind-force gumming with chalk dust removal machine, and add wet treatment with the stirring humidifier, obtain the sand output storage of water content about 5%.
As a kind of improvement, described impact breaker, impact crusher, sand chalk dust removal machine processed, the first sieve apparatus and the second sieve apparatus are provided with the suction cleaner that captures in order to dust wind-force.
Among the present invention, described impact crusher can adopt for example impact crusher of VK70 type, smashing principle is the collision that depends between building stones and the building stones, the building stones that enter system are carried out high velocity impact, produce rubble and landwaste, the Machine-made Sand particle shape is more near natural sand, and the rubble of generation is polyhedron, approach circle, elongated particles is in 5%.
The optional usefulness of suction cleaner is the fly-ash separator of pulse bag-type LMC540 type for example, and selection by winnowing control sand, stone flour separate, and powder containing quantity can be controlled in 6% as required.
Among the present invention, the sand performance of preparation is as follows:
The handstone performance of preparation is as follows:
The large stone performance of preparation is as follows:
Utilize concrete provided by the invention, compare with traditional cobble stone, river sand concrete, as follows:
In the upper table, C30-river, C40-river all are concrete that river sand, cobble, the interpolation naphthalene water reducer commonly used of the natural formation of employing is prepared from; C30-machine, C40-machine then are the concrete that adopts method preparation provided by the invention.Result's contrast can be found out by experiment, and regeneration aggregate high performance concrete provided by the invention is not less than even is better than utilizing the concrete of the river sand of natural formation, the preparation of common rubble in performance.
Owing to having adopted technique scheme, the invention has the beneficial effects as follows:
(1) regeneration aggregate high performance concrete provided by the invention, take full advantage of performance and the value of discarded concrete, the discarded concrete of originally processing as solid waste is recycled, for the processing of discarded concrete provides a new thinking, avoided the problem of engineering project disaster aggravation that conventional process do not cause at that time, the wasting of resources, environmental pollution.
(2) contriver finds under study for action, and the initial slump performance of more traditional common rubble, the river sand concrete of regeneration aggregate high performance concrete provided by the invention is better, and divergence is larger, through the time loss less, the concrete performance performance is more superior.
(3) the present invention utilizes jaw crusher, impact breaker, impact crusher and sand chalk dust removal machine processed are reasonably processed discarded concrete, to obtain particle diameter as the large stone of 20～25mm, particle diameter is that the handstone of 5～20mm and particle diameter are less than the sand of 5mm, and the dust that produces in the shattering process is carried out wind-force capture, the large stone that obtains, the outside surface mortar of handstone and sand is removed clean, large stone, handstone and sand particle diameter are even, particle is mellow and full, corner angle seldom, elongated particles is very low, and can realize gradation adjustment, so that both gratings are more reasonable, silt content is few, clod content is few, and when being mixed with concrete, voidage is very little, large stone, handstone and sand and cement slurry have more good cementability, concrete is more closely knit, this just so that concrete ultimate compression strength greatly improve, than the approximately high grade of traditional concrete.
(4) the present invention is directed to the singularity of large stone, handstone and sand that discarded concrete reclaims, through a large amount of experiments repeatedly, selected polycarboxylate water-reducer, polycarboxylate water-reducer can effectively reduce water-cement ratio, thereby has improved concrete intensity.The contriver also once did experiment, experimental result such as following table to naphthalene water reducer, lignosulfonic acid sodium salt water reducer, aliphatic high-efficiency water reducing agent and amino high high efficiency water reducing agent etc. commonly used on the market.
In a word, the present invention utilizes discarded concrete again, for the processing of discarded concrete provides a new thinking, avoided the problem of engineering project disaster aggravation, the wasting of resources, environmental pollution, and the concrete performance of preparation is good.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
A kind of preparation method of regeneration aggregate high performance concrete, discarded concrete is carried out break process, obtain particle diameter and be the large stone of 20～25mm, handstone that particle diameter is 5～20mm and particle diameter less than the sand of 5mm, and the dust that produces in the shattering process is carried out wind-force capture; Then will add polycarboxylate water-reducer, cement and an amount of water in large stone, handstone, the sand, and then make described regeneration aggregate high performance concrete.
Among the present invention, described discarded concrete carries out break process and comprises the steps:
S1. the discarded concrete material is sent into jaw crusher, utilize jaw crusher to carry out fragmentation; It should be noted that, before sending into, at first can sieve to the discarded concrete material, the composition that screens out is most be the earth of discarded concrete, reduces if these earth are sneaked into the Performances of Recycled Aggregate of Existing that subsequent handling easily causes obtaining, and also easily makes the too much dust of Working environment generation;
S2. the broken discarded concrete material that obtains among the step S1 is sent into impact breaker and carry out fragmentation, impact breaker is a kind of crushing mechanism that utilizes striking energy to come broken material, during machine work, under the drive of electric motor, the rotor high-speed rotation, when material enters the bar zone of action, broken with epitrochanterian bar bump, after thrown to again on the counterattack device again broken, then bounce back into the bar zone of action from beating lining plate again again broken, this process repeats, and material is descending to enter one, two, three back cavities repeat fragmentation, until material is crushed to desired particle size, discharged by discharge port.The gap of adjusting between impact rack and the rotor can reach the purpose that changes material discharging-material size and material shapes; Discarded concrete after the impact breaker fragmentation mostly is the following cubic granules of particle diameter 25mm;
S3. the broken discarded concrete that obtains among the step S2 being sent into the first sieve apparatus sieves, obtaining particle diameter is back to described impact breaker greater than the material of 25mm and continues broken, obtaining particle diameter is the large stone output storage of 20～25mm, obtain particle diameter and be the handstone output storage of 5～20mm, obtain particle diameter and enter next step less than the material of 5mm;
S4. the particle diameter that obtains after the screening among the step S3 is sent into impact crusher less than the material of 20mm and carry out fragmentation, through the screening of the second sieve apparatus, obtain the rubble output storage of 5～20mm and particle diameter less than sand 5mm, that particle is mellow and full;
S5. the sand that obtains among the step S4 is carried out the wind-force gumming with chalk dust removal machine, and add wet treatment with the stirring humidifier, obtain the sand output storage of water content 3%～7%.
In addition, be provided with in order to the suction cleaner with dust collection at impact breaker, impact crusher, sand chalk dust removal machine processed, the first sieve apparatus and the second sieve apparatus among the present invention, realized that the wind-force of dust captures.
In order to confirm whether the large stone, handstone and the sand that utilize discarded concrete to reclaim can reach concrete Application standard, and the present invention has carried out following detection to it.
1, the crush index of large stone and handstone
Available crush index carries out quality control in the engineering, and the crush index of rubble meets the regulation of following table:
2, sand, the requirement of stone soundness
Embodiment 1
Utilize discarded concrete to prepare large stone that particle diameter is 20～25mm, handstone that particle diameter is 5～20mm and particle diameter less than the sand of 5mm, and the dust that produces in the shattering process is carried out wind-force capture;
With the large stone of 1100kg, 350kg handstone, 850kg sand, remix adds the 14kg polycarboxylate water-reducer, adds simultaneously 400kg cement, mixes and makes regenerated aggregate concrete.
Embodiment 2
Utilize discarded concrete to prepare large stone that particle diameter is 20～25mm, handstone that particle diameter is 5～20mm and particle diameter less than the sand of 5mm, and the dust that produces in the shattering process is carried out wind-force capture;
With the large stone of 700kg, 250kg handstone, 650kg sand, remix adds the 7kg polycarboxylate water-reducer, adds simultaneously 200kg cement, mixes and makes regenerated aggregate concrete.
Embodiment 3
Utilize discarded concrete to prepare large stone that particle diameter is 20～25mm, handstone that particle diameter is 5～20mm and particle diameter less than the sand of 5mm, and the dust that produces in the shattering process is carried out wind-force capture;
With the large stone of 900kg, 300kg handstone, 750kg sand, remix adds the 11kg polycarboxylate water-reducer, adds simultaneously 300kg cement, mixes and makes regenerated aggregate concrete.
Embodiment 4
Utilize discarded concrete to prepare large stone that particle diameter is 20～25mm, handstone that particle diameter is 5～20mm and particle diameter less than the sand of 5mm, and the dust that produces in the shattering process is carried out wind-force capture;
With the large stone of 850kg, 310kg handstone, 710kg sand, remix adds the 10kg polycarboxylate water-reducer, adds simultaneously 325kg cement (wherein mixing the 10kg dust), mixes and makes regenerated aggregate concrete.
Embodiment 5
Utilize discarded concrete to prepare large stone that particle diameter is 20～25mm, handstone that particle diameter is 5～20mm and particle diameter less than the sand of 5mm, and the dust that produces in the shattering process is carried out wind-force capture;
With the large stone of 850kg, 310kg handstone, 710kg sand, remix adds the 10kg polycarboxylate water-reducer, adds simultaneously 325kg cement (wherein mixing the 50kg dust), mixes and makes regenerated aggregate concrete.
Concrete performance in above-described embodiment is as shown in the table.
The present invention is not limited to above-mentioned embodiment, and all are based on technical conceive of the present invention, and the structural improvement of having done all falls among protection scope of the present invention.
Claims (5)
1. the preparation method of a regeneration aggregate high performance concrete, it is characterized in that: discarded concrete is carried out break process, obtain respectively particle diameter and be the large stone of 20～25mm, handstone that particle diameter is 5～20mm and particle diameter less than the sand of 5mm, and the dust that produces in the shattering process is carried out wind-force capture; Then in large stone, handstone, sand, add polycarboxylate water-reducer, cement and water, and then make described regeneration aggregate high performance concrete.
2. the preparation method of a kind of regeneration aggregate high performance concrete as claimed in claim 1, it is characterized in that: described large stone, handstone, sand, polycarboxylate water-reducer and weight of cement umber are sequentially 700～1100,250～350,650～850,7～14 and 200～400.
3. the preparation method of a kind of regeneration aggregate high performance concrete as claimed in claim 1 or 2 is characterized in that: admixture has the described wind-force of 10～50 weight parts to capture the dust that obtains in the described cement.
4. the preparation method of a kind of regeneration aggregate high performance concrete as claimed in claim 1, it is characterized in that: described discarded concrete carries out break process, comprises the steps:
S1. discarded concrete is utilized jaw crusher to carry out fragmentation;
S2. the broken discarded concrete that obtains among the step S1 is entered impact breaker and carry out fragmentation;
S3. the broken discarded concrete that obtains among the step S2 being sent into the first sieve apparatus sieves, obtaining particle diameter is back to described impact breaker greater than the material of 25mm and continues broken, obtain particle diameter and be the large stone output storage of 20～25mm, obtain particle diameter and enter next step less than the material of 20mm;
S4. the particle diameter that obtains after the screening among the step S3 is sent into impact crusher less than the material of 20mm and carry out fragmentation, through the screening of the second sieve apparatus, obtain the rubble of 5～20mm and particle diameter less than sand 5mm, that particle is mellow and full;
S5. the sand that obtains among the step S4 is carried out the wind-force gumming with chalk dust removal machine, and add wet treatment with the stirring humidifier, obtain the sand output storage of water content about 5%.
5. the preparation method of a kind of regeneration aggregate high performance concrete as claimed in claim 4 is characterized in that: described impact breaker, impact crusher, sand chalk dust removal machine processed, the first sieve apparatus and the second sieve apparatus are provided with the suction cleaner that captures in order to dust wind-force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210429073.3A CN102898086B (en) | 2012-10-31 | 2012-10-31 | Preparation method of high-performance recycled aggregate concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210429073.3A CN102898086B (en) | 2012-10-31 | 2012-10-31 | Preparation method of high-performance recycled aggregate concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102898086A true CN102898086A (en) | 2013-01-30 |
| CN102898086B CN102898086B (en) | 2015-04-29 |
Family
ID=47570613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210429073.3A Active CN102898086B (en) | 2012-10-31 | 2012-10-31 | Preparation method of high-performance recycled aggregate concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102898086B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326690A (en) * | 2014-11-05 | 2015-02-04 | 泰州市腾达建筑工程机械有限公司 | Machine-made sand preparation system |
| CN104446071A (en) * | 2014-11-05 | 2015-03-25 | 泰州市腾达建筑工程机械有限公司 | Dry sand making process |
| CN105728152A (en) * | 2016-03-07 | 2016-07-06 | 上海岚致环保科技有限公司 | High-quality sand crushing production technique |
| CN105776927A (en) * | 2016-04-13 | 2016-07-20 | 广东省建筑科学研究院集团股份有限公司 | Inorganic lightweight aggregate prepared from inorganic heat insulation material waste and preparing method thereof |
| WO2017082747A1 (en) | 2015-11-13 | 2017-05-18 | Instituto Superior Técnico | High-performance concrete made with no natural aggregates and its preparation |
| CN107989374A (en) * | 2017-12-12 | 2018-05-04 | 蒋燕鑫 | A kind of construction techniques to economize on resources |
| CN108947291A (en) * | 2018-09-28 | 2018-12-07 | 沿河土家族自治县乡建商品混凝土有限责任公司 | It is a kind of to prepare recycled fine aggregate method using building waste |
| CN110054470A (en) * | 2018-05-14 | 2019-07-26 | 冯乃谦 | Solidify the manufacturing method of the environmentally protective concrete of heavy metal in lime-ash |
| CN111822088A (en) * | 2020-07-28 | 2020-10-27 | 广东通兴再生资源科技有限公司 | Recycled aggregate crushing, screening and cleaning device |
| CN113185198A (en) * | 2021-05-13 | 2021-07-30 | 苏永青 | Green concrete and preparation process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1559956A (en) * | 2004-02-26 | 2005-01-05 | 同济大学 | Regenerative bone material by concrete and preparing method thereof |
| CN101323517A (en) * | 2008-07-22 | 2008-12-17 | 浙江大学宁波理工学院 | Environment-protective type plant cover concrete |
| CN102173684A (en) * | 2011-01-28 | 2011-09-07 | 青岛理工大学 | Concrete prepared from tunnel waste slag and mineral admixture with large mixing amount and preparation method thereof |
-
2012
- 2012-10-31 CN CN201210429073.3A patent/CN102898086B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1559956A (en) * | 2004-02-26 | 2005-01-05 | 同济大学 | Regenerative bone material by concrete and preparing method thereof |
| CN101323517A (en) * | 2008-07-22 | 2008-12-17 | 浙江大学宁波理工学院 | Environment-protective type plant cover concrete |
| CN102173684A (en) * | 2011-01-28 | 2011-09-07 | 青岛理工大学 | Concrete prepared from tunnel waste slag and mineral admixture with large mixing amount and preparation method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326690A (en) * | 2014-11-05 | 2015-02-04 | 泰州市腾达建筑工程机械有限公司 | Machine-made sand preparation system |
| CN104446071A (en) * | 2014-11-05 | 2015-03-25 | 泰州市腾达建筑工程机械有限公司 | Dry sand making process |
| WO2017082747A1 (en) | 2015-11-13 | 2017-05-18 | Instituto Superior Técnico | High-performance concrete made with no natural aggregates and its preparation |
| CN105728152A (en) * | 2016-03-07 | 2016-07-06 | 上海岚致环保科技有限公司 | High-quality sand crushing production technique |
| CN105776927A (en) * | 2016-04-13 | 2016-07-20 | 广东省建筑科学研究院集团股份有限公司 | Inorganic lightweight aggregate prepared from inorganic heat insulation material waste and preparing method thereof |
| CN111851803A (en) * | 2017-12-12 | 2020-10-30 | 蒋燕鑫 | Resource-saving construction method for building construction |
| CN107989374A (en) * | 2017-12-12 | 2018-05-04 | 蒋燕鑫 | A kind of construction techniques to economize on resources |
| CN111851803B (en) * | 2017-12-12 | 2022-03-04 | 广州广建建设工程有限公司 | Resource-saving construction method for building construction |
| CN110054470A (en) * | 2018-05-14 | 2019-07-26 | 冯乃谦 | Solidify the manufacturing method of the environmentally protective concrete of heavy metal in lime-ash |
| CN110054470B (en) * | 2018-05-14 | 2021-08-06 | 冯乃谦 | Method for preparing environment-friendly concrete for curing heavy metals in ash |
| CN108947291A (en) * | 2018-09-28 | 2018-12-07 | 沿河土家族自治县乡建商品混凝土有限责任公司 | It is a kind of to prepare recycled fine aggregate method using building waste |
| CN111822088A (en) * | 2020-07-28 | 2020-10-27 | 广东通兴再生资源科技有限公司 | Recycled aggregate crushing, screening and cleaning device |
| CN113185198A (en) * | 2021-05-13 | 2021-07-30 | 苏永青 | Green concrete and preparation process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102898086B (en) | 2015-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102898086B (en) | Preparation method of high-performance recycled aggregate concrete | |
| EP2152644B1 (en) | Process for manufacturing an item for the building industry | |
| JP2010254575A (en) | Method for treatment of fly ash | |
| CN102218435A (en) | Method for recycling waste clay | |
| CN109351446A (en) | A kind of Machine-made Sand production technology | |
| CN101948280A (en) | Method for preparing building mortar from waste concrete | |
| CN109399983A (en) | A kind of spoil slag Machine-made Sand and preparation method thereof | |
| CN108947291A (en) | It is a kind of to prepare recycled fine aggregate method using building waste | |
| CN105498903B (en) | A kind of discarded concrete prepares the system and device and method of reclaimed sand | |
| CN106904847A (en) | A kind of method that utilization discarded concrete Behavior of Hardened Cement Paste mutually prepares low fever's complex cement | |
| CN109553334A (en) | A kind of recycled aggregate premixing mortar and preparation method thereof | |
| CN104030630A (en) | Method for manufacturing novel light trench covers with waste concrete | |
| CN103351107A (en) | Method for low temperature separation of waste concrete | |
| JP6084431B2 (en) | Water curable cured body | |
| CN111943545B (en) | Artificial sand and preparation method thereof | |
| CN101734892A (en) | Method for recycling waste concrete | |
| JPH10114556A (en) | Production of reclaimed cement, and reclaimed cement | |
| CN108609881B (en) | Method for improving shaping efficiency of machine-made sand based on shaping additive | |
| CN103936316A (en) | Waste-concrete regeneration system | |
| CN1105344A (en) | Method for making non-clinker cement by wet-milling flyash and product thereof | |
| CN110776288A (en) | High-performance machine-made sand concrete and preparation method of machine-made sand thereof | |
| JP2003192403A (en) | Portland cement for concrete | |
| CN112679126A (en) | Method for preparing recycled concrete by using waste concrete | |
| JP4627935B2 (en) | Conditioning material | |
| CN117602859B (en) | Sludge building material treatment system and treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Preparation method of high-performance recycled aggregate concrete Effective date of registration: 20191114 Granted publication date: 20150429 Pledgee: Industrial Commercial Bank of China Ltd Weicheng Weifang branch Pledgor: Shandong Dayuan Industrial Co.,Ltd. Registration number: Y2019990000535 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |