CN106198941B - A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior - Google Patents

A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior Download PDF

Info

Publication number
CN106198941B
CN106198941B CN201610437453.XA CN201610437453A CN106198941B CN 106198941 B CN106198941 B CN 106198941B CN 201610437453 A CN201610437453 A CN 201610437453A CN 106198941 B CN106198941 B CN 106198941B
Authority
CN
China
Prior art keywords
base joint
joint grouting
grouting glue
temperature behavior
test
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
Application number
CN201610437453.XA
Other languages
Chinese (zh)
Other versions
CN106198941A (en
Inventor
曹丽萍
刘胜强
刘忠骥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin Institute of Technology
Original Assignee
Harbin Institute of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Harbin Institute of Technology filed Critical Harbin Institute of Technology
Priority to CN201610437453.XA priority Critical patent/CN106198941B/en
Publication of CN106198941A publication Critical patent/CN106198941A/en
Application granted granted Critical
Publication of CN106198941B publication Critical patent/CN106198941B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/42Road-making materials

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Road Repair (AREA)

Abstract

A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior, it is related to a kind of method evaluated heat and fill class base joint grouting glue performance.The present invention is to solve the technical problem for the high-temperature behavior that current base joint grouting glue high-temperature behavior evaluation method can not reflect under the true pavement state of base joint grouting glue well.The present invention:First, road bed data survey;2nd, rut plate is prepared;3rd, the cementation of fissures;4th, then wheel tracking test compares deformation.The present invention, using the actual conditions at the wheel tracking test scene of can simulating, evaluates the viscous wheel of base joint grouting glue and rolls out situation on the basis of the evaluation of existing base joint grouting glue high-temperature behavior;Equipment and experimental enviroment are easily realized, the existing equipment in laboratory are rationally make use of using the method for wheel tracking test evaluation base joint grouting glue high-temperature behavior, it is not necessary to additionally develop new equipment;The evaluation index of base joint grouting glue deformation length L and base joint grouting glue deformation area two base joint grouting glue high-temperature behaviors of S is provided, result of the test is clear.The present invention is applied to field of traffic.

Description

A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior
Technical field
The present invention relates to a kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior.
Background technology
Crack is a kind of relatively conventional pavement disease, and the method for handling pavement crack disease at present is usually the cementation of fissures, heat Class base joint grouting glue is filled as a kind of common gap-grouting material by the extensive use of maintenance department.Heat fills class base joint grouting glue (the hereinafter referred to as cementation of fissures Glue) it is made of modified pitch macromolecule polymer material, good cementation of fissures glue material should have good high-temperature behavior.The cementation of fissures Glue high-temperature stability refers to that it stablizes, do not trickled, not gluing wheel under the high temperature conditions, is mainly shown as the work repeatedly in wheel load It will not be taken out of under by wheel.Although the use of base joint grouting glue is relatively broad, for the examination of the evaluation of base joint grouting glue high-temperature behavior Proved recipe method need further perfect.At present, the domestic evaluation method for base joint grouting glue high-temperature behavior has awl penetration test, softening Experimental tests, slamp value experiment, but the high-temperature behavior that can not all reflect well under the true pavement state of base joint grouting glue.
The content of the invention
The present invention is can not to reflect the cementation of fissures well to solve current heat filling class base joint grouting glue high-temperature behavior evaluation method The technical problem of high-temperature behavior under the true pavement state of glue, and a kind of side for evaluating heat and filling class base joint grouting glue high-temperature behavior is provided Method.
The method that a kind of evaluation heat of the present invention fills class base joint grouting glue high-temperature behavior is carried out according to the following steps:
First, road bed data survey:Investigate and obtain the basic data of actual bituminous paving;
2nd, rut plate is prepared:It is complete that the basic data of the actual bituminous paving obtained according to step 1 prepares basic data Identical asphalt, is then placed in mould, by the way of reserved groove, use rolling method prepare a size for 300mm × 300mm × 50mm cuboid rut plate test specimen, and the surface that a size is 300mm × 300mm wherein Centerline has a cuboid groove to simulate the crack of bituminous paving, and the length of cuboid groove is 300mm, width and depth Degree is identical with the width and depth of the cementation of fissures of actual bituminous paving fluting, cuboid groove center line alongst and length The center line of rut plate surface of test piece where cube groove overlaps;The cementation of fissures groove width of described actual bituminous paving is 10mm~20mm, depth are 10mm~20mm;
3rd, the cementation of fissures:With base joint grouting glue, the cementation of fissures, the base joint grouting glue after guarantee cooling are higher by the cuboid groove described in step 2 Rut plate surface of test piece 2mm~3mm where cuboid groove, the base joint grouting glue after cooling is in the rut plate where cuboid groove Surface of test piece is rectangle and overlapped with the center line of cuboid groove that the width of the base joint grouting glue after cooling is 80mm;
4th, wheel tracking test:The complete rut plate test specimen of the cementation of fissures is placed in wheel rutting test machine specimen stage, the temperature of testing machine is set For 60 DEG C, the direction of guarantee wheel traveling and cuboid groove long side direction are vertically and in the center line of cuboid groove long side Place, wheel tracking test observe the deformation of base joint grouting glue in 5min, 10min, 20min, 30min and 45min after starting, if some Base joint grouting glue has occurred and that damage inactivation during timing node, that is, stops wheel tracking test, and this time is recorded as the out-of-service time, during failure Between longer, base joint grouting glue high-temperature behavior it is better;If there is no damage inactivation in 45min base joint grouting glues, the examination of base joint grouting glue rut is calculated The base joint grouting glue deformation length L or base joint grouting glue deformation area S tested, does 3~5 groups of parallel test and averagesWithDeformation lengthThe high-temperature behavior of smaller then base joint grouting glue is better, deformation areaSmaller then high-temperature behavior is better;
Wheel tracking test start after 45min, the exterior lateral area of two long sides of base joint grouting glue before wheel tracking test is not carried out In, base joint grouting glue after deformation distance do not carry out two farthest points of two long sides of base joint grouting glue before wheel tracking test with apart from its compared with The distance of two long sides near gap is respectively LAAnd LB, base joint grouting glue deformation length L is LAAnd LBIn maximum, i.e. L= max(LA,LB);
Wheel tracking test start after 45min, base joint grouting glue of the base joint grouting glue before wheel tracking test is not carried out two after deformation The area of the exterior lateral area of long side is respectively SAAnd SB, base joint grouting glue deformation area S is SAAnd SBSum.
The method of the present invention can be used for the high-temperature behavior for comparing base joint grouting glues different at that same temperature.
Base joint grouting glue generation damage inactivation refers to that base joint grouting glue all departs from cuboid groove in step 4.
The invention has the advantages that:
(1) it is high in existing base joint grouting glue the invention provides a kind of new method of effectively evaluating base joint grouting glue high-temperature behavior On the basis of warm performance evaluation, the viscous wheel of the actual conditions at the wheel tracking test scene of can simulating, further evaluation base joint grouting glue is utilized And situation is rolled out, make up the deficiency of existing experiment;
(2) equipment and experimental enviroment of the invention are easily realized, the side of base joint grouting glue high-temperature behavior is evaluated using wheel tracking test Method rationally make use of the existing equipment in laboratory, it is not necessary to additionally develop new equipment;
(3) present invention provides base joint grouting glue deformation length L according to the rut plate experiment after wheel tracking test and base joint grouting glue deforms The evaluation index of two base joint grouting glue high-temperature behaviors of area S, result of the test is clear, so as to effectively instruct the selection of base joint grouting glue.
Brief description of the drawings
Fig. 1 is the top view of the mould in step 2 of the present invention, and 1 is packing area, and 2 be projection;
Fig. 2 is the schematic diagram of the rut plate test specimen in step 2 in the present invention, and 3 be cuboid groove;
Fig. 3 is the schematic diagram of the rut plate test specimen after the cementation of fissures in step 3 of the present invention, and 4 be base joint grouting glue, and 5 be that rut plate tries Part;
Fig. 4 is the schematic diagram that wheel tracking test is carried out in step 4 of the present invention, and 4 be base joint grouting glue, and 5 be rut plate test specimen, and 6 be wheel Tire;
Fig. 5 is to take measurement base joint grouting glue deformation length L to test base joint grouting glue height after step 4 wheel tracking test of the present invention terminates The schematic diagram of rut plate test specimen during warm nature energy, 4 is do not carry out the base joint grouting glue region before wheel tracking test, and 5 be rut plate test specimen, and 7 For the base joint grouting glue region after deformation;
Fig. 6 is to take measurement base joint grouting glue deformation area S to test base joint grouting glue height after step 4 wheel tracking test of the present invention terminates The schematic diagram of rut plate test specimen during warm nature energy, 4 is do not carry out the base joint grouting glue region before wheel tracking test, and 5 be rut plate test specimen, and 7 For the base joint grouting glue region after deformation;
The unit of all sizes is mm in figure.
Embodiment
Embodiment one:With reference to Fig. 1-6, present embodiment is a kind of side for evaluating heat and filling class base joint grouting glue high-temperature behavior Method, specifically carry out according to the following steps:
First, road bed data survey:Investigate and obtain the basic data of actual bituminous paving;
2nd, rut plate is prepared:It is complete that the basic data of the actual bituminous paving obtained according to step 1 prepares basic data Identical asphalt, is then placed in mould, by the way of reserved groove, use rolling method prepare a size for 300mm × 300mm × 50mm cuboid rut plate test specimen, and the surface that a size is 300mm × 300mm wherein Centerline has a cuboid groove to simulate the crack of bituminous paving, and the length of cuboid groove is 300mm, width and depth Degree is identical with the width and depth of the cementation of fissures of actual bituminous paving fluting, cuboid groove center line alongst and length The center line of rut plate surface of test piece where cube groove overlaps;The cementation of fissures groove width of described actual bituminous paving is 10mm~20mm, depth are 10mm~20mm;
3rd, the cementation of fissures:With base joint grouting glue, the cementation of fissures, the base joint grouting glue after guarantee cooling are higher by the cuboid groove described in step 2 Rut plate surface of test piece 2mm~3mm where cuboid groove, the base joint grouting glue after cooling is in the rut plate where cuboid groove Surface of test piece is rectangle and overlapped with the center line of cuboid groove that the width of the base joint grouting glue after cooling is 80mm;
4th, wheel tracking test:The complete rut plate test specimen of the cementation of fissures is placed in wheel rutting test machine specimen stage, the temperature of testing machine is set For 60 DEG C, the direction of guarantee wheel traveling and cuboid groove long side direction are vertically and in the center line of cuboid groove long side Place, wheel tracking test observe the deformation of base joint grouting glue in 5min, 10min, 20min, 30min and 45min after starting, if some Base joint grouting glue has occurred and that damage inactivation during timing node, that is, stops wheel tracking test, and this time is recorded as the out-of-service time, during failure Between longer, base joint grouting glue high-temperature behavior it is better;If there is no damage inactivation in 45min base joint grouting glues, the examination of base joint grouting glue rut is calculated The base joint grouting glue deformation length L or base joint grouting glue deformation area S tested, does 3~5 groups of parallel test and averagesWithDeformation lengthThe high-temperature behavior of smaller then base joint grouting glue is better, deformation areaSmaller then high-temperature behavior is better;
Wheel tracking test start after 45min, the exterior lateral area of two long sides of base joint grouting glue before wheel tracking test is not carried out In, base joint grouting glue after deformation distance do not carry out two farthest points of two long sides of base joint grouting glue before wheel tracking test with apart from its compared with The distance of two long sides near gap is respectively LAAnd LB, base joint grouting glue deformation length L is LAAnd LBIn maximum, i.e. L= max(LA,LB);
Wheel tracking test start after 45min, base joint grouting glue of the base joint grouting glue before wheel tracking test is not carried out two after deformation The area of the exterior lateral area of long side is respectively SAAnd SB, base joint grouting glue deformation area S is SAAnd SBSum.
Embodiment two:The difference of present embodiment and embodiment one is:Pitch described in step 1 The basic data on road surface is the species gathered materials in bituminous pavement top mix type, asphalt mixture gradation, compound and mixed Close the label of material pitch.Other are identical with embodiment one.
Embodiment three:The difference of present embodiment and embodiment one is:Mould described in step 2 Have for the cuboid of a hollow uncovered, the depth of boring is 50mm, and length and width is 300mm, bottom internally One projection is set among face, and the length of projection be 300mm, the width of projection and the highly cementation of fissures with actual bituminous paving respectively The width of fluting is identical with depth.Other are identical with embodiment one.
Embodiment four:The difference of present embodiment and embodiment one or two is:Entering in step 4 The round rolling speed of wheel is 42 times/min during row wheel tracking test.Other are identical with embodiment one or two.
Embodiment five:The difference of present embodiment and embodiment one to four is:Described in step 4 Base joint grouting glue deformation area S measuring method be:Base joint grouting glue deformed region after the completion of wheel tracking test covers transparent rice lattice Paper, the outline of the base joint grouting glue after deformation is depicted in transparent rice ruled paper with pen, base joint grouting glue deformation is calculated to obtain from rice ruled paper Then area S is labeled to obtain base joint grouting glue deformation area S using taking pictures using CAD.Other and embodiment one It is identical to four.

Claims (5)

  1. A kind of 1. method evaluated heat and fill class base joint grouting glue high-temperature behavior, it is characterised in that evaluation heat fills class base joint grouting glue high-temperature behavior Method is carried out according to the following steps:
    First, road bed data survey:Investigate and obtain the basic data of actual bituminous paving;
    2nd, rut plate is prepared:The basic data of the actual bituminous paving obtained according to step 1 prepares identical asphalt, It is then placed in mould, using reserved fluted manner, uses rolling method to prepare a size as 300mm × 300mm × 50mm's Cuboid rut plate test specimen, and the centerline on the surface that a size is 300mm × 300mm has a cuboid wherein For groove to simulate the crack of bituminous paving, the length of cuboid groove is 300mm, width and depth and the filling of actual bituminous paving The width of seam fluting is identical with depth, the center line of cuboid groove alongst and the rut plate where cuboid groove The center line of surface of test piece overlaps;The cementation of fissures groove width of described actual bituminous paving is 10mm~20mm, depth 10mm ~20mm;
    3rd, the cementation of fissures:With base joint grouting glue, the cementation of fissures, the base joint grouting glue after guarantee cooling are higher by rectangular in the cuboid groove described in step 2 Rut plate surface of test piece 2mm~3mm where body groove, the base joint grouting glue after cooling is in the rut plate test specimen where cuboid groove Surface is rectangle and overlapped with the center line of cuboid groove that the width of the base joint grouting glue after cooling is 80mm;
    4th, wheel tracking test:The complete rut plate test specimen of the cementation of fissures is placed in wheel rutting test machine specimen stage, the temperature for setting testing machine is 60 DEG C, the direction of guarantee wheel traveling and cuboid groove long side direction are vertically and in the midline of cuboid groove long side, car The deformation of base joint grouting glue is observed after rut on-test in 5min, 10min, 20min, 30min and 45min, if some time Base joint grouting glue has occurred and that damage inactivation during node, that is, stops wheel tracking test, and this time is recorded as the out-of-service time, and the out-of-service time gets over Length, the high-temperature behavior of base joint grouting glue are better;If there is no damage inactivation in 45min base joint grouting glues, base joint grouting glue wheel tracking test is calculated Base joint grouting glue deformation length L or base joint grouting glue deformation area S, does 3~5 groups of parallel test and averagesWithDeformation lengthMore The high-temperature behavior of small then base joint grouting glue is better, deformation areaSmaller then high-temperature behavior is better;
    Wheel tracking test start after 45min, in the exterior lateral area of two long sides of base joint grouting glue before not carrying out wheel tracking test, become Base joint grouting glue distance after shape do not carry out two farthest points of two long sides of base joint grouting glue before wheel tracking test with it is nearer apart from it The distance of two long sides in gap is respectively LAAnd LB, base joint grouting glue deformation length L is LAAnd LBIn maximum, i.e. L=max (LA, LB);
    Wheel tracking test start after 45min, base joint grouting glue two long sides of the base joint grouting glue before wheel tracking test is not carried out after deformation The area of exterior lateral area be respectively SAAnd SB, base joint grouting glue deformation area S is SAAnd SBSum.
  2. A kind of 2. method evaluated heat and fill class base joint grouting glue high-temperature behavior according to claim 1, it is characterised in that step 1 Described in the basic data of bituminous paving be bituminous pavement top mix type, asphalt mixture gradation, gather materials in compound Species and pitch label.
  3. A kind of 3. method evaluated heat and fill class base joint grouting glue high-temperature behavior according to claim 1, it is characterised in that step 2 Described in mould be the cuboid of hollow uncovered, the depth of boring is 50mm, and length and width is 300mm, One projection is set among bottom surface internally, the length of projection be 300mm, the width of projection and highly respectively with actual pitch The width of the cementation of fissures fluting on road surface is identical with depth.
  4. A kind of 4. method evaluated heat and fill class base joint grouting glue high-temperature behavior according to claim 1, it is characterised in that step 4 In when carrying out wheel tracking test the round rolling speed of wheel be 42 times/min.
  5. A kind of 5. method evaluated heat and fill class base joint grouting glue high-temperature behavior according to claim 1, it is characterised in that step 4 Described in base joint grouting glue deformation area S measuring method be:Base joint grouting glue deformed region after the completion of wheel tracking test covers transparent Rice ruled paper, with pen transparent rice ruled paper depict deformation after base joint grouting glue outline, the cementation of fissures is calculated to obtain from rice ruled paper Then glue deformation area S is labeled to obtain base joint grouting glue deformation area S using taking pictures using CAD.
CN201610437453.XA 2016-06-17 2016-06-17 A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior Active CN106198941B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610437453.XA CN106198941B (en) 2016-06-17 2016-06-17 A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610437453.XA CN106198941B (en) 2016-06-17 2016-06-17 A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior

Publications (2)

Publication Number Publication Date
CN106198941A CN106198941A (en) 2016-12-07
CN106198941B true CN106198941B (en) 2018-01-30

Family

ID=57460678

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610437453.XA Active CN106198941B (en) 2016-06-17 2016-06-17 A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior

Country Status (1)

Country Link
CN (1) CN106198941B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101178340A (en) * 2007-11-21 2008-05-14 长安大学 Asphalt pavement reflection crack propagation analog experiment device
CN102135481A (en) * 2011-01-10 2011-07-27 东南大学 Method for testing rutting-resistant performance of mixture in bituminous pavement
CN102252915A (en) * 2011-06-09 2011-11-23 北京科路泰技术有限公司 Method for performing low temperature performance test on joint strip by using pull test machine
CN103278406A (en) * 2013-06-14 2013-09-04 哈尔滨工业大学 Testing device and testing method for evaluating rutting resistance of asphalt mixture
CN105259339A (en) * 2015-11-17 2016-01-20 江苏中路工程技术研究院有限公司 Testing method for texture depth anti-attenuation capacity of paving asphalt
CN105675852A (en) * 2014-08-26 2016-06-15 交通运输部公路科学研究所 Method for evaluating road surface driving performance of crack adhesive

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101178340A (en) * 2007-11-21 2008-05-14 长安大学 Asphalt pavement reflection crack propagation analog experiment device
CN102135481A (en) * 2011-01-10 2011-07-27 东南大学 Method for testing rutting-resistant performance of mixture in bituminous pavement
CN102252915A (en) * 2011-06-09 2011-11-23 北京科路泰技术有限公司 Method for performing low temperature performance test on joint strip by using pull test machine
CN103278406A (en) * 2013-06-14 2013-09-04 哈尔滨工业大学 Testing device and testing method for evaluating rutting resistance of asphalt mixture
CN105675852A (en) * 2014-08-26 2016-06-15 交通运输部公路科学研究所 Method for evaluating road surface driving performance of crack adhesive
CN105259339A (en) * 2015-11-17 2016-01-20 江苏中路工程技术研究院有限公司 Testing method for texture depth anti-attenuation capacity of paving asphalt

Also Published As

Publication number Publication date
CN106198941A (en) 2016-12-07

Similar Documents

Publication Publication Date Title
CN209368648U (en) The test of cement stabilizing RAP mixture Base Asphalt Pavement reflection crack and evaluating apparatus
CN104749095B (en) Pavement skid resistance condition evaluation method based on tire Yu road surface contact characteristic
Byzyka et al. Thermal segregation of asphalt material in road repair
CN105899731A (en) Geocell with improved compaction and deformation resistance
CN104316416B (en) A kind of asphalt semicircle loads direct shear test device and test method thereof
CN105865957A (en) Testing method for cold-recycling indoor high-temperature stability
CN208136691U (en) A kind of Cost of New Type Asphalt Pavement cementation of fissures reparation structure
CN106198941B (en) A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior
CN107907430A (en) A kind of experimental rig and test method for testing asphalt mixture shearing performance
CN104792822A (en) Local thermal regenerative heating effect indoor test simulation method for asphalt pavement
CN107831070A (en) A kind of compression shear test device of composite pavement structure intensity and fatigue
CN104777095B (en) A kind of device and method that fatigue behaviour is bonded for test pavement gap-grouting material
Roozbahany et al. Fracture testing for the evaluation of asphalt pavement joints
CN206545177U (en) A kind of road and bridge crack ruggedized construction
CN110826807B (en) Method for rapidly predicting dynamic resilience modulus of roadbed filler in seasonal frozen region
CN106251402B (en) The building of reclamation work filling construction threedimensional model, compactness inspection method
CN207380235U (en) A kind of pavement structure for Ground Penetrating Radar
CN104215365A (en) Pavement structure layer internal shearing stress testing sensor and embedding technology and application thereof
CN104655500B (en) The method for determining the material composition of bituminous paving interlayer treatment measures
CN110106893A (en) A method of auxiliary roadbed, dam embankment operation
CN206292149U (en) A kind of test fixture of bituminous paving interlayer cohesive force
CN108319760A (en) A kind of graded broken stone base plastic deformation prediction model and predictor method
CN107064203A (en) A kind of asphalt pavement crack hot type base joint grouting glue selecting method
CN105241699B (en) A kind of preparation method of pitch girder test material preparation mould and pitch girder test specimen
CN206570666U (en) A kind of quick temperature compensation equipment of Asphalt Pavement Damage

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant