CN107740354A - A kind of bridge on highway crack restorative procedure based on carbon fiber board - Google Patents
A kind of bridge on highway crack restorative procedure based on carbon fiber board Download PDFInfo
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- CN107740354A CN107740354A CN201711008172.3A CN201711008172A CN107740354A CN 107740354 A CN107740354 A CN 107740354A CN 201711008172 A CN201711008172 A CN 201711008172A CN 107740354 A CN107740354 A CN 107740354A
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- carbon fiber
- fiber board
- crack
- bolt
- anchorage
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Abstract
The invention discloses a kind of bridge on highway crack restorative procedure based on carbon fiber board, including Crack Detection, and fracture carries out special analysis；Prepare construction material, construction equipment, erection construction rack platform；And perforate is cleaned；Bolt is implanted into, and cleans bolt, and will be bolted in perforate by anchoring adhesive；Surface of concrete structure processing, anchorage installation, installs fixing end limitting casing, anchor block is installed in limitting casing, installs stretching end limitting casing, installs wedge so that wedge bottom is under concrete；Carbon fiber board is fixed at crack by anchorage；The present invention takes pre-stressed carbon fiber plate to apply external prestressing strengthening reinforcement to box beam bottom, the strength and stiffness of structure can be improved, reduce the deflection deformation of structure, suppress the development in crack, the durability of bridge and the ultimate bearing capacity of structure, the safety stock of increase bridge operation can be improved with reference to crack closure Disposal Measures.
Description
Technical field
The present invention relates to bridge field, more particularly to a kind of bridge on highway crack restorative procedure based on carbon fiber board.
Background technology
In the construction of other bridge external prestressing reinforcement and strengthenings, usually using deformed bar, steel strand wires, high tensile steel wire
Deng material, external loads are offset to internal force caused by beam body by applying prestressing force, are improved its ultimate bearing capacity, are suppressed crack
Development.Deformed bar, steel strand wires, high tensile steel wire add bridge deadweight from great, unfavorable to works ultimate bearing capacity.
The content of the invention
The purpose of the present invention is that to solve the above problems and provides a kind of freeway bridge based on carbon fiber board
Beam crack restorative procedure.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of bridge on highway crack restorative procedure based on carbon fiber board, comprises the following steps：
S1, Crack Detection, and fracture carries out special analysis, analysing content include Defect types, defect location, apparent lacked
Sunken and internal flaw；
S2, preparation of construction, prepare construction material, construction equipment, erection construction rack platform；
S3, positioning drilling, and perforate is cleaned；
S4, bolt implantation, clean bolt, and will be bolted in perforate by anchoring adhesive；
S5, surface of concrete structure processing, it is determined that fixed anchorage, wedge and stretching end anchorage position, and cut wedge shape
Block and the concrete of anchor block position, solidification polish flat；
S6, anchorage installation, fixing end limitting casing is installed, anchor block is installed in limitting casing, makes itself and limitting casing center line
Unanimously；Stretching end limitting casing is installed, wedge is installed so that wedge bottom 14mm under concrete, and limiting wedge
Position inframe can move freely；
Carbon fiber board, is fixed at crack by S7, carbon fiber board installation, tensioning by anchorage；
Specifically, above-mentioned S3 comprises the following steps：
A1, beam body reinforcement location, and marking are verified, avoid bore position from conflicting with reinforcement location；
A2, preparation is identical with anchorage base plate size and is labeled with the glued board in numbering and direction, and on the glued board
Mark bore position；
A3, glued board is fitted in beam body, and in labeling position vertical open pores；
A4, nozzle is goed deep into aperture bottom, and be blown into clean oil-free air, pull out nozzle, repeatedly；
A5, scrub-brush inserted in perforate, it is multiple to come and go rotation；
A6, A4~A5 steps are repeated, until perforate inwall is clean.
Specifically, above-mentioned S4 comprises the following steps：
B1, using acetone perforate inwall and bolt are wiped, remove foreign matter and greasy dirt on bolt；
B2, by anchoring adhesive inject perforate in, groundwater increment be hole depth 2/3；
B3, bolt is rotatably inserted into the colloid of perforate, and is generally aligned in the same plane the top of multiple screw rods, and corrected
The perpendicularity of bolt；
B4, colloid solidification is waited, avoid having planted bolt in uncured preceding shake-up or vibration.
Specifically, above-mentioned S7 comprises the following steps：
C1, at each slide lines position of anchorage, limitting casing smear grease；
C2, using acetone the contact surface of carbon fiber board and concrete component is scrubbed；
C3, bonded adhesives is smeared on carbon fiber board；
C4, carbon fiber board first is installed in stretching end, then carbon fiber board and deflecting plate are installed in fixing end, and ensure carbon fiber
Plate center sag is not more than 20cm；
C5, in stretching end high-strength bolt, pad, nut and jack are installed, and make jack center of effort and two height
Center line of making a concerted effort after strong screw rod stress is consistent, and with carbon fiber board center superposition；
C6, the initial stress for applying 10% to carbon fiber board, make carbon fiber board exceptionally straight, then stress are zeroed, record tensioning
The position of end installation wedge, and check each component locations；
C7, prestressing force is applied to carbon fiber board with 25%, 50% and 75% stress again, spiral shell is tightened after terminating per one-level tensioning
Cap, often hold lotus 5 minutes between one-level, record the position of stretching end wedge；
C8, the deviation that final carbon fiber board elongation value of stretching and theoretic elongation are calculated when applying prestress to 100%,
And hold lotus 5 minutes；
C9, tensioning with anchorage fix tensioning high-strength bolt after terminating, according to 75%, 50%, 25%, 10% removal thousand step by step
Jin top；
C10, the connection for checking carbon fiber board and concrete component, it is ensured that be in close contact.
The beneficial effects of the present invention are：
A kind of bridge on highway crack restorative procedure based on carbon fiber board of the present invention takes pre-stressed carbon fiber plate pair
Box beam bottom applies external prestressing strengthening reinforcement, it is possible to increase the strength and stiffness of structure, reduces the deflection deformation of structure, presses down
The development in crack processed, the durability of bridge and the ultimate bearing capacity of structure can be improved with reference to crack closure Disposal Measures, increased
The safety stock of bridge operation.
Embodiment
With reference to specific embodiment, the invention will be further described：
Exemplified by finding that D ring roads box beam occurs compared with multiple cracking when in Cheng Anyu highways Lip river band intercommunication ring road bridge machinery
It is specifically described.
After after testing, D ring roads the first the first refer to following table across crack.
Inclined crack：Diagonal crack caused by box beam flange plate, generally Web-shea crevasse, bearing is mainly appeared on to L/4 (L
Grown for fine strain of millet) in the range of, substantially it is in 20 °~60 ° angles with top plate, 1/3~1/2 is extended downward into by top plate and web intersection
At deck-molding, direction is substantially vertical with principal tensile stress, directly influences the safety and durability of structure.
Transverse crack：Transverse crack appears in web middle and upper part, and width is respectively less than 0.15mm.Producing reason has following several
Point：1st, relevant too early with form removal, Concrete intensity insufficient causes crack；2nd, concrete locally vibrates leakiness, concrete shrinkage
Crack is produced, is mostly occurred in the bad position of Surface Quality of Concrete；3rd, placement layer by layer interval time is long, and sandwich concrete connects
Connect of poor quality, cause transverse crack.
Vertical Cracks：Vertical Cracks are divided into following several according to its development position difference：1st, develop since web bottom,
Upwardly extend；2nd, develop since web top, extend downwardly；3rd, crack extends from passage to upper and lower both sides；4th, belly splits
Seam with soleplate crack UNICOM, by bridge construction situation, the trend in crack and quantity, crack deploy time, crack point
Cloth position etc. is analyzed, temperature change, structure dead load and concrete component itself geometry etc. in support stability, summer in winter alternating
Make the increase of inside concrete tension under composite factor effect, when tension increases to tensile region surface concrete ultimate tensile strength
Afterwards, just there is crack, this crack belongs to non-structural crack.
Chicken-wire cracking：Chicken-wire cracking is desciccation crack.This kind of crack appears in a period of time after box beam conserves more or poured
Latter week left and right.Concrete surface is influenceed by external condition after the completion of pouring, and moisture loss is very fast, and deformation is larger, and internal water
Point loss it is slower, temperature change is smaller, surface area it is larger it is dry-shrinkage deformed will by inside concrete constrain and produce larger
Tension causes the formation in crack, therefore the more low then cement slurry drying shrinkage of relative humidity is bigger in concrete, and desciccation crack is more held
It is also easy to produce.Desciccation crack is mostly surface parallel shape or netted, belongs to non-constructilvity crack.But desciccation crack, which produces, can influence coagulation
The anti-permeability performance of soil, causes steel bar corrosion, influences the durability of bridge.
The performance parameters of pre-stressed carbon fiber plate see the table below：
Select satisfactory carbon fiber board.
1st, the fiber precursor of carbon fiber board is necessary for continuous fiber, and the Main Mechanical of carbon fiber former material should meet rule
It is fixed.
2nd, carbon fiber board uses CFP-I-20 type carbon fiber boards, thickness 2.0mm, width 100mm, and supporting adhesive is adopted
With CFSR-A/B carbon fiber rubbers.
3rd, carbon fiber board, carbon fiber rubber need to meet《Reinforcement of Engineering Structure material safety identification technology specification》(GB
50728-2011) and《Concrete structure reinforcement design specification》I grade carbon fibers plate and A level glue in (GB 50367-2013)
Performance indications requirement；Sample mode is sampling Detection, and sampling batch is at least 3 different batches；
4th, carbon fiber board and carbon fiber rubber need to provide the safety that national authority mechanism provides, kind of inspection is sampling Detection
Property probation report, meets the design life requirement of 50 years；Wherein carbon fiber board need to pass through tensile strength, elongation, interlayer
Shear strength, positive drawing adhesion strength are examined；Carbon fiber rubber need to by environment-protecting and non-poisonous, 90 days wet and heat ageing resistants, impact peel ability,
210 days resistance to long-term stress, endurance stress, freeze-thawing resistant and media-resistant, which corrode, to be examined；
5th, pre-stressed carbon fiber plate anchor system need to use the same brand prestressing force supporting with carbon fiber board, carbon fiber rubber
Carbon plate anchor system, ensure its material suitability；Meanwhile pre-stressed carbon fiber plate anchor system need to use wedge-shaped intermediate plate anchor, peace
After installing, anchor system is non-dismountable, ensures the reliability of its anchor system；
6th, manufacturer need to be by ISO9001 quality management type of production certifications, and provide corresponding certification certificate.
7th, the anchor tool system of prestressing force carbon plate need to be tested by the anchoring efficiency of 2,000,000 testing fatigues and anchorage, its anchor
Gu efficiency measured value need to be more than 0.95.
8th, carbon fiber board and carbon fiber rubber need to be according to《Building structure strengthening engineering construction quality acceptance specification》(GB50550-
2010) requirement carries out the reinspection of witness sampling, need to meet that I grade carbon fibers plate and A levels paste fiber composite timber-used knot in specification
The index request of structure glue；
9th, the anchor tool system of prestressing force carbon plate need to be according to《Use for tendon anchorage, fixture and connector》(GB/T14370-
2007) requirement is rechecked, and it detects sample and is no less than three groups, and the anchorage efficiency coefficient of reinspection is not less than 0.95；
10th, when prestressing force carbon plate carries out live tensioning, live Xu You third party testing agency is using strain gauge to pre-
Stress carbon plate control stress for prestressing is monitored in real time, it is ensured that tension stress reaches 0.3 σ MPa.σ is carbon fiber board tensile strength
Standard value, it is taken as 1200Mpa.
Pre-stressed carbon fiber plate is constructed.
Preparation of construction → construction lofting → steel planting → concrete surface processing → anchorage installation → carbon fiber board installation
→ carbon fiber board installs tensioning and stickup → finished product protection → quality testing
(1) preparation of construction
The preparation of main material and equipment：Scaffold, acetone, anchoring adhesive, bonded adhesives, carbon fiber board, electronic scale, generating
Mechanical, electrical pneumatic pick etc..
Construction bracket platform, the landing stage of scaffold is set up according to field condition, base fixed is safe and reliable, and top layer support is away from beam
Bottom is in 1.4~1.5m.
(2) setting-out is carried out according to design drawing, determines carbon fiber board and both ends anchorage position.
(3) beam body reinforcement location, and marking are verified, avoids bore position from conflicting with reinforcement location；Prepare and anchorage bottom
Board size is identical and is labeled with the glued board in numbering and direction, and marks bore position on the glued board；Glued board is pasted
Close in beam body, and it is diametrically 18mm to be bored in labeling position electric hammer drill, depth is 12.5cm vertical open pores；By hair-dryer
Nozzle gos deep into aperture bottom, and is blown into clean oil-free air, pulls out nozzle, is repeated 3 times；Scrub-brush is inserted in perforate,
Come and go rotation 3 times；Circulation, until perforate inwall is clean.
(4) perforate inwall and bolt are wiped using acetone, removes foreign matter and greasy dirt on bolt；Anchoring adhesive is injected into perforate
Interior, groundwater increment is the 2/3 of hole depth；Bolt is rotatably inserted into the colloid of perforate, and makes the top of multiple screw rods positioned at same
Plane, and the perpendicularity of calibration bolt；Colloid solidification is waited, avoids being worth bolt in uncured preceding shake-up or vibration.
(5) position of fixed anchorage, wedge and stretching end anchorage is determined according to construction lofting.Artificial chisel except wedge and
Anchor block position concrete, depth about 3cm, is repaired using repair sheets, is polished flat after solidification.Angle is used in carbon fiber board opening position
Grinding machine is polished beam body concrete surface, then is wiped with dry cloth, it is ensured that the smooth no dust of sticking veneer.
(6) anchorage installation, fixing end limitting casing is installed, anchor block is installed in limitting casing, and ensure limitting casing center line
Unanimously.Stretching end limitting casing, installation wedge (fixture) so that wedge bottom 14mm under concrete are installed, it is ensured that wedge shape
Block can move freely in anchorage limitting casing.
(7) carbon fiber board is installed
1st, the position for contacting stretching end wedge, limitting casing and each slip of smooth steel plate for having pasted applies and oiled
Fat.
The 2nd, surface that carbon fiber board is contacted to concrete component with acetone scrubs.
3rd, 2-3mm bonded adhesives is smeared on carbon fiber board.
4th, first in stretching end carbon fiber board is installed, then installs carbon fiber board and deflecting plate in fixing end, during installation
It is noted that stopping grips piece, carbon fiber board center maximum sag cannot be greater than 20cm.
5th, in stretching end installation Φ 20 high-strength bolts, pad, nut, jack, it is ensured that jack center of effort and two high
Center line of making a concerted effort after strong screw rod stress is consistent, and with carbon fiber board center superposition, jack peak power 20T, stroke
300mm。
6th, first apply 10% (0.3MPa) stress to carbon fiber board, make carbon fiber board exceptionally straight, then power is zeroed again.Note
The position of stretching end fixture is recorded, and checks again for the position of each part.
7th, given again with 25% (21KN, 14.3MPa), 50% (42KN, 10.9MPa) and 75% (63KN, 17.5MPa) stress
Carbon fiber board applies prestressing force, and screw up with a wrench nut after terminating per one-level tensioning, holds lotus 5 minutes between every one-level, record
The position of pull end fixture, compare the deviation between measured value and calculated value.
8th, apply prestress to and calculate final carbon fiber board tensioning when 100% i.e. stretching force is 84KN (24.1MPa) and stretch
Long value, and hold lotus 5 minutes.
9th, fix tensioning high-strength bolt with anchorage after tensioning terminates, step by step (respectively by 75%, 50%, 25%, 10%,
0) slow removal jack.
10th, sticking carbon fiber plate, for the not close position of beam body, should adopt an effective measure, it is ensured that closely be connect with beam body
Touch, to avoid the generation of hollowing phenomenon.
Technical scheme is not limited to the limitation of above-mentioned specific embodiment, and every technique according to the invention scheme is done
The technology deformation gone out, each falls within protection scope of the present invention.
Claims (4)
1. a kind of bridge on highway crack restorative procedure based on carbon fiber board, it is characterised in that comprise the following steps：
S1, Crack Detection, and fracture carries out special analysis, analysing content include Defect types, defect location, visual defects and
Internal flaw；
S2, preparation of construction, prepare construction material, construction equipment, erection construction rack platform；
S3, positioning drilling, and perforate is cleaned；
S4, bolt implantation, clean bolt, and will be bolted in perforate by anchoring adhesive；
S5, surface of concrete structure processing, it is determined that fixed anchorage, wedge and stretching end anchorage position, and cut wedge and
The concrete of anchor block position, solidification polish flat；
S6, anchorage installation, fixing end limitting casing is installed, anchor block is installed in limitting casing, makes it consistent with limitting casing center line；
Stretching end limitting casing is installed, wedge is installed so that wedge bottom 14mm under concrete, and make wedge in limitting casing
It can move freely；
Carbon fiber board, is fixed at crack by S7, carbon fiber board installation, tensioning by anchorage.
2. a kind of bridge on highway crack restorative procedure based on carbon fiber board according to claim 1, its feature exist
In above-mentioned S3 comprises the following steps：
A1, beam body reinforcement location, and marking are verified, avoid bore position from conflicting with reinforcement location；
A2, preparation is identical with anchorage base plate size and is labeled with the glued board in numbering and direction, and is marked on the glued board
Bore position；
A3, glued board is fitted in beam body, and in labeling position vertical open pores；
A4, nozzle is goed deep into aperture bottom, and be blown into clean oil-free air, pull out nozzle, repeatedly；
A5, scrub-brush inserted in perforate, it is multiple to come and go rotation；
A6, A4~A5 steps are repeated, until perforate inwall is clean.
3. a kind of bridge on highway crack restorative procedure based on carbon fiber board according to claim 1, its feature exist
In above-mentioned S4 comprises the following steps：
B1, using acetone perforate inwall and bolt are wiped, remove foreign matter and greasy dirt on bolt；
B2, by anchoring adhesive inject perforate in, groundwater increment be hole depth 2/3；
B3, bolt is rotatably inserted into the colloid of perforate, and is generally aligned in the same plane the top of multiple screw rods, and calibration bolt
Perpendicularity；
B4, colloid solidification is waited, avoid having planted bolt in uncured preceding shake-up or vibration.
4. a kind of bridge on highway crack restorative procedure based on carbon fiber board according to claim 1, its feature exist
In above-mentioned S7 comprises the following steps：
C1, at each slide lines position of anchorage, limitting casing smear grease；
C2, using acetone the contact surface of carbon fiber board and concrete component is scrubbed；
C3, bonded adhesives is smeared on carbon fiber board；
C4, carbon fiber board first is installed in stretching end, then carbon fiber board and deflecting plate are installed in fixing end, and ensure in carbon fiber board
Heart sag is not more than 20cm；
C5, in stretching end high-strength bolt, pad, nut and jack are installed, and make jack center of effort and two high-strength spiral shells
After bar stress make a concerted effort center line it is consistent, and with carbon fiber board center superposition；
C6, the initial stress for applying 10% to carbon fiber board, make carbon fiber board exceptionally straight, then stress are zeroed, record stretching end peace
The position of wedge is filled, and checks each component locations；
C7, prestressing force is applied to carbon fiber board with 25%, 50% and 75% stress again, terminates rear tightening nuts per one-level tensioning,
Lotus is held between per one-level 5 minutes, records the position of stretching end wedge；
C8, the deviation of final carbon fiber board elongation value of stretching and theoretic elongation is calculated when applying prestress to 100%, and hold
Lotus 5 minutes；
C9, tensioning with anchorage fix tensioning high-strength bolt after terminating, according to 75%, 50%, 25%, 10% step by step removal it is very heavy
Top；
C10, the connection for checking carbon fiber board and concrete component, it is ensured that be in close contact.
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| CN201711008172.3A CN107740354A (en) | 2017-10-25 | 2017-10-25 | A kind of bridge on highway crack restorative procedure based on carbon fiber board |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778712A (en) * | 2019-03-22 | 2019-05-21 | 北京市市政工程设计研究总院有限公司 | A kind of method and prefabricated beam body for continuously locating to limit beam-ends corner displacement for bridge floor |
| CN110453615A (en) * | 2019-08-26 | 2019-11-15 | 卡本科技集团股份有限公司 | A kind of method that detachable pre-stressed carbon fiber plate is used to reinforce hollow slab girder |
| CN110725219A (en) * | 2019-10-17 | 2020-01-24 | 北京房修一建筑工程有限公司 | Motor vehicle bridge reinforcing process |
| CN112095497A (en) * | 2020-10-26 | 2020-12-18 | 潘林妃 | Building bridge reinforcement construction method |
| CN113461433A (en) * | 2021-08-05 | 2021-10-01 | 上海大学 | Prestressed fiber reinforced C/SiBCN ceramic composite material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201778500U (en) * | 2010-08-16 | 2011-03-30 | 合肥工业大学 | Device for pretensioning carbon fiber board to reinforce concrete beam board |
| CN204139623U (en) * | 2014-09-15 | 2015-02-04 | 宁夏路桥工程股份有限公司 | A kind of new device about stretch-draw prestressing force carbon fiber board |
| CN106382011A (en) * | 2016-11-09 | 2017-02-08 | 陕西通宇新材料有限公司 | Tensioning-anchoring system and method for prestressed carbon fiber plate of concrete structure |
-
2017
- 2017-10-25 CN CN201711008172.3A patent/CN107740354A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201778500U (en) * | 2010-08-16 | 2011-03-30 | 合肥工业大学 | Device for pretensioning carbon fiber board to reinforce concrete beam board |
| CN204139623U (en) * | 2014-09-15 | 2015-02-04 | 宁夏路桥工程股份有限公司 | A kind of new device about stretch-draw prestressing force carbon fiber board |
| CN106382011A (en) * | 2016-11-09 | 2017-02-08 | 陕西通宇新材料有限公司 | Tensioning-anchoring system and method for prestressed carbon fiber plate of concrete structure |
Non-Patent Citations (1)
| Title |
|---|
| 吴佯洋: "混凝土梁桥的预应力碳纤维板加固技术研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778712A (en) * | 2019-03-22 | 2019-05-21 | 北京市市政工程设计研究总院有限公司 | A kind of method and prefabricated beam body for continuously locating to limit beam-ends corner displacement for bridge floor |
| CN110453615A (en) * | 2019-08-26 | 2019-11-15 | 卡本科技集团股份有限公司 | A kind of method that detachable pre-stressed carbon fiber plate is used to reinforce hollow slab girder |
| CN110725219A (en) * | 2019-10-17 | 2020-01-24 | 北京房修一建筑工程有限公司 | Motor vehicle bridge reinforcing process |
| CN112095497A (en) * | 2020-10-26 | 2020-12-18 | 潘林妃 | Building bridge reinforcement construction method |
| CN113461433A (en) * | 2021-08-05 | 2021-10-01 | 上海大学 | Prestressed fiber reinforced C/SiBCN ceramic composite material and preparation method thereof |
| CN113461433B (en) * | 2021-08-05 | 2022-05-27 | 上海大学 | Prestressed fiber reinforced C/SiBCN ceramic composite material and preparation method thereof |
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Application publication date: 20180227 |