CN109322225A - A kind of multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure - Google Patents
A kind of multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure Download PDFInfo
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- CN109322225A CN109322225A CN201811243060.0A CN201811243060A CN109322225A CN 109322225 A CN109322225 A CN 109322225A CN 201811243060 A CN201811243060 A CN 201811243060A CN 109322225 A CN109322225 A CN 109322225A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 67
- 239000010410 layer Substances 0.000 title claims abstract description 43
- 239000002346 layers by function Substances 0.000 title claims abstract description 20
- 238000012423 maintenance Methods 0.000 title claims abstract description 18
- 239000004575 stone Substances 0.000 claims abstract description 23
- 238000004064 recycling Methods 0.000 claims abstract description 19
- 230000008929 regeneration Effects 0.000 claims abstract description 18
- 238000011069 regeneration method Methods 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 21
- 239000004568 cement Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000008595 infiltration Effects 0.000 claims description 6
- 238000001764 infiltration Methods 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 238000003801 milling Methods 0.000 abstract description 6
- 230000006378 damage Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000008521 reorganization Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
Abstract
The present invention discloses a kind of multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure, belongs to field of road.The pavement maintenance structure include be arranged from top to bottom newly mix asphalt uplayer, cutting optimal in heat regeneration asphalt, base in hot recycling PAM pitch flexibility, PMRE emulsified asphalt stress absorbing layer, cool recycled cement-stabilizing broken stone are gone to a grassroots level, the cool recycled cement-stabilizing broken stone draining underlayment in big gap.Multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure of the invention solves the problems such as conventional pav inside configuration impeded drainage, reflection crack is serious, anti-rut behavior is poor while making full use of old road milling material compared with prior art, prevent pavement structure from cyclicity damage occur, extend pavement structure whole service life, it can reach energy-saving and emission-reduction, the effect for reducing project cost, there is good application value.
Description
Technical field
The present invention relates to field of road, specifically a kind of multi-layer recycled functional layer drainage crack resistance type bituminous pavement
Maintaining structure.
Background technique
By the end of the year 2017, the highway in China total kilometrage that is open to traffic reaches 4,770,000 kilometers, wherein highway mileage open to traffic 13.6
It ten thousand kilometers, ranks first in the world, highway plays basic, critical effect to communications and transportation and economic development.
China's active service bituminous pavement has had greatly military service 10 years or more, and pavement behavior has been unsatisfactory for of today
Volume of traffic demand is faced with overhaul or reorganization and expansion, and in the case where Environmental Protection Situation sternness, raw material shadow in short supply in all parts of the country
Ring and arrive engineering construction, the regeneration of old road milling material will alleviate significantly former material it is in short supply caused by constructional difficulties, while also rising
The effect of project cost is reduced to energy-saving and emission-reduction.At the same time, the asphalt pavement structure in 90% or more China is using semi-rigid base
Layer, semi-rigid material rigidity is big, plate body is preferable, but is also easy to produce drying shrinkage and warm plastic forming, gradually reflexes under load action
Road surface top surface, this also causes road surface transverse crack to become important one of disease, how to solve the crack reflection of semi-rigid type base
What is seemed is particularly important；For semi-rigid asphalt pavement by runing all the year round, natural precipitation passes through at road table, crack or center
Dividing strip penetrates into structure interlayer and inside, makes a large amount of ponding in structure and is difficult to be discharged, in traffic load or the work repeatedly of freeze thawing
Occur the diseases such as cracking, purt slurry, loose and pit slot quickly with lower pavement structure, brings and seriously affect to traffic safety.
Summary of the invention
Technical assignment of the invention is in view of the above shortcomings of the prior art, it is anti-to provide a kind of multi-layer recycled functional layer draining
Split type asphalt pavement maintenance structure.The structure can sufficiently recycle old road milling material, pass through structure optimization, optimization of material
Conventional pav inside configuration impeded drainage, the problems such as reflection crack is serious, anti-rut behavior is poor are solved, road surface can be effectively prevent
Structure crack and discharge road surface inside configuration ponding, extend pavement structure whole service life, while accomplishing energy-saving and emission-reduction, drop again
Low project cost.
Technical assignment of the invention is realized in the following manner: a kind of multi-layer recycled functional layer drainage crack resistance type asphalt road
Face maintaining structure, including be arranged from top to bottom newly mix asphalt uplayer, cutting optimal, hot recycling PAM pitch in heat regeneration asphalt
Base in flexibility, PMRE emulsified asphalt stress absorbing layer, cool recycled cement-stabilizing broken stone go to a grassroots level, big gap cool recycled cement is steady
Determine rubble draining underlayment.The big cool recycled cement-stabilizing broken stone in gap drains base in underlayment and hot recycling PAM pitch flexibility
Draining and cracking resistance are taken into account, the water in pavement structure can be effectively excluded, reduces the generation and development of reflection crack；Stress is inhaled
Receiving layer can be relieved reflection crack to upper layer development；Heat regeneration asphalt layer high-temperature behavior is excellent, and road surface rutting resistance can be improved；On
Surface layer guarantees its good surface property with newly asphalt is mixed.
To guarantee more excellent drainage performance, can in hot recycling PAM pitch flexibility base and big gap it is cool recycled
Cement-stabilizing broken stone drains underlayment and is provided with longitudinal rubble french drain close to the position at road shoulder edge, and the setting of rubble french drain bottom is horizontal
To drainpipe.
Transverse drain preferably uses the pvc pipe of not aperture, and the gradient is advisable with penetrating into moisture and can be discharged in time, preferably
Not less than 5%, caliber is preferably 8 ~ 15cm, can be arranged by 20 ~ 30m of spacing.
In above-mentioned pavement structure, bituminous pavement upper layer is directly exposed to external environment, bears nearly all unfavorable nature
Factor, while repeated stock and abrasion by traffic load, this requires upper layer that must have good properties at high temperature, antiskid
Property, wearability, weatherability etc., the upper surface of present invention layer is using newly asphalt is mixed, to provide above-mentioned good surface property.
Cutting optimal (or heat regeneration asphalt cutting optimal) in heat regeneration asphalt can be effectively sharp using heat regeneration asphalt mixture
With old road pitch milling material, heat regeneration asphalt mixture possesses excellent high-temperature behavior, and road surface can be improved and support in high temperature season
The ability of rutting deformation.For the effective bonding for guaranteeing each bitumen layer, adhesion coating can be equipped between each layer.
The thickness of base is preferably 10 ~ 12cm in hot recycling PAM pitch flexibility, and RAP volume is preferably 30 ~ 45%, newly plus glue
Ramming material is MAC modified pitch, and the newer spice of asphalt content is substantially reduced, and is 2.1 ~ 2.6%, and Design Air Voids are 13 ~ 18%, infiltration
Coefficient is not less than 0.2cm/s.It is heat regeneration asphalt cutting optimal on base in hot recycling PAM pitch flexibility, to guarantee the two
Bond effect, centre setting adhesion coating；It under base is that cool recycled cement-stabilizing broken stone is gone to a grassroots level in hot recycling PAM pitch flexibility,
Therebetween it is equipped with 1 ~ 3cmPRME emulsified asphalt stress absorbing layer, the energy that absorbable cement treated material crack generates when occurring prolongs
Slow crack continues up development, while having water shutoff effect.The stress absorbing layer is emulsified asphalt pitch synchronous surface dressing,
Rubble is preferably 5 ~ 10mm limestone and/or basalt, and bituminous cements uses PMRE emulsified asphalt.
PMRE emulsified asphalt index used in PMRE emulsified asphalt stress absorbing layer are as follows:
Demulsification degree is not small by 50%；Evaporated residue residual divides content not less than 66%；Evaporated residue needle penetration (25 DEG C, 0.1mm)
Not less than 80；Evaporated residue needle penetration (4 DEG C, 0.1mm) 30 ~ 60；Evaporated residue elasticity restores (10 DEG C) and is not less than 58%.
The thickness of the big cool recycled cement-stabilizing broken stone draining underlayment in gap is preferably 15 ~ 20cm, and voidage is preferably 18 ~
25%, cement dose is preferably the percentage that 6.5 ~ 8%(accounts for aggregate quality), the ratio of mud is preferably 0.3 ~ 0.4%, volume content of steel fibers
Preferably 2 ~ 3%, length of steel fiber is preferably 30 ~ 45mm, and diameter is preferably 0.4 ~ 0.6mm, and draw ratio is preferably 60 ~ 80, tension
Intensity is greater than 450Mpa.
The grading limit of the cool recycled cement-stabilizing broken stone mixture in big gap is preferred are as follows:
Standard mesh 26.5mm percent of pass range is 100%；Standard mesh 19mm percent of pass range is 80 ~ 95%；Standard mesh
16mm percent of pass range is 63 ~ 82%；Standard mesh 13.2mm percent of pass range is 45 ~ 62%；Standard mesh 9.5mm percent of pass model
Enclose is 25 ~ 40%；Standard mesh 4.75mm percent of pass range is 3 ~ 10%；Standard mesh 2.36mm percent of pass range is 1 ~ 5%；Mark
Quasi- sieve pore 0.075mm percent of pass range is 0 ~ 2%.
7 days compressive strength after immersion of the cool recycled cement-stabilizing broken stone mixture in big gap are not less than 4.5MPa, and infiltration coefficient is not
Less than 0.3cm/s.
Compared with prior art, pavement structure of the invention have it is following prominent the utility model has the advantages that
(1) multiple regeneration function floor reasonable dispositions are, it can be achieved that re-applying for old road milling material, it is tight to alleviate raw material comprehensively
Constructional difficulties caused by, reduce project cost, and energy-saving and emission-reduction meet green construction requirement；
(2) in heat regeneration asphalt mixture, cutting optimal high-temperature behavior is excellent, can effectively improve the anti-rut behavior on road surface；
(3) base is used cooperatively with PMRE emulsified asphalt stress absorbing layer in hot recycling PAM pitch flexibility, on the one hand can incite somebody to action
Go deep into the timely and effective discharge of moisture inside structure sheaf, avoids ponding inside pavement structure, effectively reduce outside moisture to cement
On the other hand the destruction of stabilized macadam base can prevent Semi-rigid Base Reflective Crevice from continuing up development；
(4) the cool recycled cement-stabilizing broken stone draining underlayment in big gap can will be seeped by road table, crack or median strip
The moisture discharge for entering structure interlayer and inside, avoids ponding inside pavement structure, effectively reduces destruction of the outside moisture to roadbed；
Its mixture belongs to skeleton gap structure, and suitable steel fibre is added, and not only itself anti-crack ability is strong, can also eliminate and inhale
The reflection stress for receiving crevice of roadbed, prevents top pavement cracking, to promote the durability of entire pavement structure, extends road
Face service life has significant economic benefit, social benefit and environmental benefit；
(5) since understructure Anti-reflective Crack of Overlaying and drainage measure are tight, reflection crack can not reach heat regeneration asphalt face substantially
Layer, can play the excellent high temperature resistant property of heat regeneration asphalt mixture, without worrying its crack resistance and water resistant to greatest extent
Damage the deficiency of performance.
Detailed description of the invention
Attached drawing 1 is the multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structural schematic diagram of the present invention.
Specific embodiment
Referring to Figure of description with specific embodiment to multi-layer recycled functional layer drainage crack resistance type bituminous pavement of the invention
Maintaining structure is described in detail below.
Embodiment:
As shown in Fig. 1, multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure mainly by being laid with from top to bottom
Newly mix asphalt uplayer 1, surface layer 2, heat regeneration asphalt mixture cutting optimal 3, hot recycling PAM pitch in heat regeneration asphalt mixture
Base 4 in flexibility, PMRE emulsified asphalt stress absorbing layer 5, cool recycled cement-stabilizing broken stone 6, big gap of going to a grassroots level are cool recycled
Cement-stabilizing broken stone drains underlayment 7 and constitutes.
Asphalt uplayer 1 newly is mixed, with a thickness of 4cm, using SMA-13 asphalt.
Surface layer 2 in heat regeneration asphalt mixture, with a thickness of 6cm, using hot recycling AC-20 asphalt.
Heat regeneration asphalt mixture cutting optimal 3, with a thickness of 8cm, using hot recycling AC-25 asphalt.
Base 4 in hot recycling PAM pitch flexibility, with a thickness of 12cm, using hot recycling PAM-25, RAP volume 35%, newly
Asphalt content 2.3%, voidage 15.5%, infiltration coefficient 0.27cm/s.
PMRE emulsified asphalt stress absorbing layer 5, thickness 1cm, rubble uses 5 ~ 10mm limestone, with 0.3% 70# road
Asphalt wraps, spreading amount 6.3kg/m2, bituminous cements is using PMRE emulsified asphalt, spread quantity 2.0L/m2。
PMRE emulsified asphalt index are as follows:
Demulsification degree 56%；Evaporated residue residual divides content 69.5%；Evaporated residue needle penetration (25 DEG C, 0.1mm) 85.6；It steams
Send out residue needle penetration (4 DEG C, 0.1mm) 37.8；Evaporated residue elasticity restores (10 DEG C) 64.3%.
Cool recycled cement-stabilizing broken stone goes to a grassroots level 6, thickness 12cm.
The big cool recycled cement-stabilizing broken stone in gap drains underlayment 7, thickness 18cm, mixture formate gradation composition are as follows:
Standard mesh 26.5mm percent of pass is 100%；Standard mesh 19mm percent of pass is 90%；Standard mesh 16mm percent of pass is
73.5%；Standard mesh 13.2mm percent of pass is 55.8%；Standard mesh 9.5mm percent of pass is 31.2%；Standard mesh 4.75mm is logical
Crossing rate is 9.0%；Standard mesh 2.36mm percent of pass is 4.3%；Standard mesh 0.075mm percent of pass is 1.8%.
Cement dose is 7.5% in the cool recycled cement-stabilizing broken stone mixture in big gap, and the ratio of mud 0.36%, steel fibre is mixed
Amount is 2.3%, length of steel fiber 37.8mm, diameter 0.52mm, draw ratio 72.7, tensile strength 480Mpa, mixture
Voidage be 20.6%, 7 days compressive strength after immersion are 5.32MPa, infiltration coefficient 0.59cm/s.
The cool recycled cement-stabilizing broken stone draining underlayment 7 of base 4 and big gap is close to road shoulder in hot recycling PAM pitch flexibility
The position at edge 10 is designed with longitudinal rubble french drain 8.Transverse drain 9 is arranged in 8 bottom of rubble french drain.Transverse drain 9
The gradient is 5.5%, and using the pvc pipe of not aperture, caliber 10cm, the spacing of adjacent row water pipe is 25m.
In conclusion due to use multi-layer recycled structure sheaf, and design have base in hot recycling PAM pitch flexibility,
The cool recycled cement-stabilizing broken stone of PMRE emulsified asphalt stress absorbing layer and big gap drains underlayment, with traditional semi-rigid pavement knot
Structure method for maintaining is compared, which is utilized old road milling material, after structure optimization, whole crack resistance
Energy, water resistant damage capability and anti-rut behavior are significantly increased, and therefore, have better endurance quality, can greatly prolong road surface
Service life, save the cost are realized environmental-friendly.
Claims (10)
1. a kind of multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure, it is characterised in that: including setting from top to bottom
Asphalt uplayer, cutting optimal in heat regeneration asphalt, base, PMRE emulsified asphalt are answered in hot recycling PAM pitch flexibility for newly mixing of setting
Power absorbed layer, cool recycled cement-stabilizing broken stone are gone to a grassroots level, the cool recycled cement-stabilizing broken stone in big gap drains underlayment.
2. multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure according to claim 1, which is characterized in that
Position of the cool recycled cement-stabilizing broken stone draining underlayment of base and big gap close to road shoulder edge in hot recycling PAM pitch flexibility
It is provided with longitudinal rubble french drain, transverse drain is arranged in rubble french drain bottom.
3. multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure according to claim 2, which is characterized in that
Transverse drain is using the pvc pipe of not aperture, and for the gradient not less than 5%, caliber is 8 ~ 15cm, is arranged by 20 ~ 30m of spacing.
4. multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure according to claim 1 or 2, feature exist
In base with a thickness of 10 ~ 12cm, RAP volume 30 ~ 45% in hot recycling PAM pitch flexibility.
5. multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure according to claim 4, which is characterized in that
Use new of base mixture plus cementitious matter be for MAC modified pitch in hot recycling PAM pitch flexibility, new pitch dosage for 2.1 ~
2.6%, mixture gap rate is 13 ~ 18%, and infiltration coefficient is not less than 0.2cm/s.
6. multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure according to claim 1 or 2, feature exist
In PMRE emulsified asphalt stress absorbing layer is with a thickness of 1 ~ 3cm.
7. multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure according to claim 6, which is characterized in that
PMRE emulsified asphalt index used in PMRE emulsified asphalt stress absorbing layer are as follows:
Demulsification degree is not small by 50%；Evaporated residue residual divides content not less than 66%；Evaporated residue needle penetration (25 DEG C, 0.1mm)
Not less than 80；Evaporated residue needle penetration (4 DEG C, 0.1mm) 30 ~ 60；Evaporated residue elasticity restores (10 DEG C) and is not less than 58%.
8. multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure according to claim 1 or 2, feature exist
In, the cool recycled cement-stabilizing broken stone draining underlayment in big gap with a thickness of 15 ~ 20cm, voidage is 18 ~ 25%, and cement accounts for collection
Expect the 6.5 ~ 8% of quality, the ratio of mud is 0.3 ~ 0.4%, and volume content of steel fibers is 2 ~ 3%.
9. multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure according to claim 8, which is characterized in that
The grading limit of the cool recycled cement-stabilizing broken stone mixture in big gap are as follows:
Standard mesh 26.5mm percent of pass range is 100%；Standard mesh 19mm percent of pass range is 80 ~ 95%；Standard mesh
16mm percent of pass range is 63 ~ 82%；Standard mesh 13.2mm percent of pass range is 45 ~ 62%；Standard mesh 9.5mm percent of pass model
Enclose is 25 ~ 40%；Standard mesh 4.75mm percent of pass range is 3 ~ 10%；Standard mesh 2.36mm percent of pass range is 1 ~ 5%；Mark
Quasi- sieve pore 0.075mm percent of pass range is 0 ~ 2%.
10. multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure according to claim 8, feature exist
In,
The length of steel fiber is 30 ~ 45mm, and diameter is 0.4 ~ 0.6mm, and draw ratio is 60 ~ 80, and tensile strength is greater than 450MPa；
7 days compressive strength after immersion of the cool recycled cement-stabilizing broken stone mixture in big gap are not less than 4.5MPa, infiltration coefficient
Not less than 0.3cm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811243060.0A CN109322225A (en) | 2018-10-24 | 2018-10-24 | A kind of multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811243060.0A CN109322225A (en) | 2018-10-24 | 2018-10-24 | A kind of multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure |
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| CN201811243060.0A Pending CN109322225A (en) | 2018-10-24 | 2018-10-24 | A kind of multi-layer recycled functional layer drainage crack resistance type asphalt pavement maintenance structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110387781A (en) * | 2019-06-04 | 2019-10-29 | 北京中企卓创科技发展有限公司 | A kind of Flying Area in Airport road face " pot cover effect " causes the control method of disaster |
| CN112832087A (en) * | 2021-01-12 | 2021-05-25 | 山东省交通科学研究院 | Full-flexible plant-mixed hot recycling asphalt pavement structure |
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