CN208455400U - A kind of energy-saving environment protection asphalt pavement structure - Google Patents
A kind of energy-saving environment protection asphalt pavement structure Download PDFInfo
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Abstract
The utility model discloses a kind of energy-saving environment protection asphalt pavement structures, belong to road pavement technical field.Its main feature is that the direct making of asphalt layer is composed of in soil matrix top surface the asphalt structure sheaf with different function, there is thicker asphalt surface course.The asphalt layer is followed successively by anti-fatigue layer, waterproof stress release layer, lower supporting course, upper supporting course, abrasion-resistant surface consumption layer from bottom to top.Compared with prior art, the pavement structure of the utility model reduces road surface structare layer overall thickness, reduce the consumption to construction materials such as cement, sand materials, effectively road surface is avoided to occur structural damage in a short time, substantially prolong pavement structure service life, achieved the purpose that it is durable, economical, environmentally friendly in the life cycle management of road surface, have good application value.
Description
Technical field
The utility model relates to paving field, specifically a kind of energy-saving environment protection asphalt pavement structure.
Background technique
China's asphalt pavement of highway traditional structure is semi-rigid asphalt pavement, and structure sheaf overall thickness usually exists
70cm or more (as shown in Fig. 2, above soil matrix, is followed successively by three layers of 18cm cement stabilized macadam base, 8cmAC-25 from bottom to top
Surface layer, 4cmSMA-13 upper layer in cutting optimal, 6cmAC-20).On the one hand, it is limited to the anti-fatigue ability of semi-rigid type base
And endurance issues, China's Pavement Design service life are 15 years, periodic overhaul, reconstruction cause the huge wasting of resources and environmental protection
Pressure.On the other hand, no matter semi-rigid type base uses cement stabilized soil material or lime stabilization class material, requires to have
Certain thickness consumes a large amount of gravels, rubble.Attention with China to efforts at environmental protection, high energy consumption, high pollution and welding
Sand material exploitation and cement processing are largely limited, and leading to highway construction and maintenance raw material resources, there is a serious shortage of no
Highway construction progress and quality are only seriously affected, while also greatly having raised pavement engineering cost.
Summary of the invention
The technical assignment of the utility model is in view of the above shortcomings of the prior art, to provide a kind of energy-saving environment-friendly type drip
Green pavement structure.
The technical assignment of the utility model is realized in the following manner: a kind of energy-saving environment protection asphalt pavement knot
Structure, the direct making of asphaltic road-mix surface course is in soil matrix top surface, and the asphaltic road-mix surface course is by five layers of drip with different function
Green mixture structure layer is composed, and is followed successively by anti-fatigue layer, waterproof stress release layer, lower supporting course, upper load-bearing from bottom to top
Layer and abrasion-resistant surface consume layer, and anti-fatigue layer, waterproof stress release layer, lower supporting course, upper supporting course and abrasion-resistant surface consume the total of layer
With a thickness of 30~45cm.
Anti-fatigue layer, waterproof stress release layer, lower supporting course, upper supporting course and abrasion-resistant surface consumption layer overall thickness be preferably
40~45cm, such as 41cm, 42cm, 43cm or 44cm.
When the making pavement structure, at 20 DEG C, the Composite resilient modulus of 10HZ experimental condition should be not less than for soil matrix top surface
220MPa, preferably 220~700MPa, such as 220~300MPa.
Anti-fatigue layer preferably uses particulate formula close-graded modified asphalt mixture, nominal maximum particle diameter: 9.5~16mm；
Voidage: 2%~3%, preferably 2.5%~2.7%；Stability: 8~10KN, preferably 9~9.5KN；Flow valuve: 2~4mm,
Preferably 3.5~4mm；Void in mineral aggregate: 13%~16%, preferably 15%~15.5%；Pitch saturation degree: 80%~
90%, preferably 85%~90%；Thickness: 4~8cm, such as 4cm, 5cm, 6cm, 7cm or 8cm, preferably 6cm, 7cm or 8cm.
Anti-fatigue layer optimum gradation range are as follows:
Standard mesh 19mm percent of pass range is 100%, and standard mesh 16mm percent of pass range is 100%~95%, mark
Quasi- sieve pore 13.2mm percent of pass range is 96%~88%, and standard mesh 9.5mm percent of pass range is 83%~72%, standard screen
Hole 4.75mm percent of pass range is 55%~42%, and standard mesh 2.36mm percent of pass range is 50%~40%, standard mesh
1.18mm percent of pass range is 38%~28%, and standard mesh 0.6mm percent of pass range is 28%~18%, standard mesh
0.3mm percent of pass range is 20%~14%, and standard mesh 0.15mm percent of pass range is 15%~10%, standard mesh
0.075mm percent of pass range is 8%~5%.
Waterproof stress release layer preferably uses grain formula modified pitch stabilization gravel mixture in open gradation, nominal maximum grain
Diameter: 19~31.5mm；Voidage: 12%~17%, preferably 15%~16%；Laminate construction thickness: 8~12cm, as 8cm,
9cm, 10cm, 11cm or 12cm, preferably 9cm, 10cm or 11cm；Dynamic stability: 2600~8000 times/mm, preferably 3500
~6000 times/mm；Uniaxial direct tensile cracking resistance number: 300~2000 times, preferably 800~1000 times；Coefficient of permeability: 0.1~1cm/
S, preferably 0.3~0.5cm/s.
Waterproof stress release layer optimum gradation range are as follows:
Standard mesh 31.5mm percent of pass range is 100%~90%, and standard mesh 26.5mm percent of pass range is 95%
~70%, standard mesh 19mm percent of pass range be 76%~40%, standard mesh 13.2mm percent of pass range be 58%~
28%, standard mesh 9.5mm percent of pass range is 39%~29%, and standard mesh 4.75mm percent of pass range is 29%~6%,
Standard mesh 2.36mm percent of pass range is 18%~6%, and standard mesh 1.18mm percent of pass range is 15%~3%, standard
Sieve pore 0.6mm percent of pass range is 10%~2%, and standard mesh 0.3mm percent of pass range is 7%~1%, standard mesh
0.15mm percent of pass range is 6%~1%, and standard mesh 0.075mm percent of pass range is 4%~1%.
Lower supporting course preferably uses continuous grading high stiffness bituminous concrete, nominal maximum particle diameter: 16~19mm；Pitch
Dosage: 5.1%~5.5%；Laminate construction thickness: 8~12cm, such as 8cm, 9cm, 10cm, 11cm or 12cm, preferably 9cm, 10cm
Or 11cm；Structure sheaf dynamic modulus (20 DEG C, 10Hz): 14000~30000MPa, preferably 15000~23000MPa；Fatigue examination
Test (10 DEG C, 25Hz) circulations 106It is secondary, range of strain: 130~1000 μ ε, preferably 150~300 μ ε.
Lower supporting course optimum gradation range are as follows:
Standard mesh 26.5mm percent of pass range is 100%, and standard mesh 19mm percent of pass range is 100%~90%,
Standard mesh 9.5mm percent of pass range is 82%~66%, and standard mesh 4.75mm percent of pass range is 64%~41%, standard
Sieve pore 2.36mm percent of pass range is 43%~28%, and standard mesh 0.075mm percent of pass range is 8%~6%.
Upper supporting course preferably uses continuous grading high stiffness bituminous concrete, nominal maximum particle diameter: 13.2~16mm；Its
Asphalt content: 5.2%~5.6%, preferably 5.3%~5.5%；Laminate construction thickness: 5~10cm, as 5cm, 6cm, 7cm,
8cm, 9cm or 10cm, preferably 9cm or 10cm；Structure sheaf dynamic modulus (20 DEG C, 10Hz): 14000~20000Mpa, preferably
For 19000~20000Mpa；(10 DEG C, 25Hz) of fatigue test circulations 106It is secondary, range of strain: 130~1000 μ ε, preferably 170
~320 μ ε.
Upper supporting course optimum gradation range are as follows:
Standard mesh 19mm percent of pass range is 100%, and standard mesh 16mm percent of pass range is 100% -90%, mark
Quasi- sieve pore 9.5mm percent of pass range is 82%~66%, and standard mesh 4.75mm percent of pass range is 64%~41%, standard screen
Hole 2.36mm percent of pass range is 43%~28%, and standard mesh 0.075mm percent of pass range is 8%~6%.
Abrasion-resistant surface consumption layer preferably uses gap grading modified stone mastic asphalt mixture, nominal maximum particle diameter:
9.5~13.2mm；Laminate construction thickness: 4~6cm, such as 4cm, 5cm or 6cm, preferably 4cm or 5cm；Structure sheaf dynamic modulus (20
DEG C, 10Hz): 9000~12000MPa, preferably 10000~11000MPa；Dynamic stability (70 DEG C, 1.0Mpa): 3500~
10000 times/mm, preferably 4000~6000 times/mm.
Abrasion-resistant surface consumes layer optimum gradation range are as follows:
Standard mesh 16mm percent of pass range is 100%, and standard mesh 13.2mm percent of pass range is 100%~96%,
Standard mesh 9.5mm percent of pass range is 75%~50%, and standard mesh 4.75mm percent of pass range is 34%~20%, standard
Sieve pore 2.36mm percent of pass range is 26%~15%, and standard mesh 1.18mm percent of pass range is 24%~14%, standard screen
Hole 0.6mm percent of pass range is 20%~12%, and standard mesh 0.3mm percent of pass range is 16%~10%, standard mesh
0.15mm percent of pass range is 15%~9%, and standard mesh 0.075mm percent of pass range is 12%~8%.
Anti-fatigue layer, waterproof stress release layer and/or abrasion-resistant surface consumption layer use modified pitch, so that entire pavement structure
Ability with stronger resisting fatigue cracking, Water Damage and surface-functional damage.
The index request of the modified pitch:
Lower supporting course and/or upper supporting course preferably use high stiffness pitch, so that the structure sheaf has sufficient intensity and resists
Fatigue capability improves entire pavement structure bearing capacity and durability.
The technical requirements of the high stiffness pitch:
The continuous grading high stiffness asphalt concrete technique index request that lower supporting course and/or upper supporting course use is as follows:
Bulk volume method survey voidage: 2%~4%, preferably 2.5%~3.5%；Void in mineral aggregate: 13%~16%, it is excellent
It is selected as 13.5%~15.5%；Pitch saturation degree: 78%~100%, preferably 80%~90%；Freeze-thaw split retained strength
Than: 80%~100%, preferably 80%~95%；Wheel tracking test (30000 times, 60 DEG C) rutting depth percentage: 0~
7.5%, preferably 0~3.5%；Low-temperature bending failure strain range (- 10 DEG C): 2000~10000 μ ε, preferably 2500~
4000με；Dynamic stability (70 DEG C, 1.0Mpa): 4000~20000 times/mm, preferably 4000~10000 times/mm；Hamburger test
(20000 times, 50 DEG C) maximum distortion: 0~7mm, preferably 0~5mm.
Compared with prior art, the energy-saving environment protection asphalt pavement structure of the utility model has and has following prominently
Beneficial effect:
(1) on the basis of having grasped pavement structure different layers position fatigue properties and pavement structure dynamic response is regular, lead to
Specific aim configuration feature layer is crossed, reasonable combination is carried out, selects high stiffness bituminous concrete supporting course, making drips directly on soil matrix
Green mixture structure layer, semi-rigid type base need to be arranged in the past to reach the design of requirement for bearing capacity by improving, and road surface knot can be thinned
Structure thickness 30cm or more saves the consumption of the raw material such as cement, sand material, significantly reduces energy consumption, reduces to ecological ring
The destruction in border.
(2) by the way that anti-fatigue layer is arranged in structural base, the ultimate tensile strength at bitumen layer bottom is improved, road surface is reduced
Fatigue cracking；By the way that waterproof stress release layer is arranged, effectively disposition enters the water inside pavement structure, prevents road surface from water damage occur
It is bad, sub-layer crack stress is discharged, prevents reflection crack from developing to upper layer；By the way that high stiffness bituminous concrete supporting course is arranged,
Improve ability and pavement structure integral strength that pavement structure resists permanent deformation；It is mixed by setting asphalt-mastic-broken stone
Expect upper layer, improves the durability, planarization and attrition resistance of pavement structure, improve the service ability of pavement structure.Respectively
Structure sheaf is all asphalt, and Coating combination is closer, has more preferable compatibility of deformation, effectively reduces road surface early stage damage
It is bad, reduce fund and social pressures caused by pavement maintenance & rehabilitation, reduces life cycle management project cost.
(3) the structure combination of each functional layer, the Pavement Design service life can be extended 25 years or more, effectively improve road surface knot
The endurance quality of structure increases pavement structure maintenance cycle, improves road surface service ability, has significant society, economic effect
Benefit.
Detailed description of the invention
Attached drawing 1 is the utility model environment protection asphalt pavement structural schematic diagram；
Attached drawing 2 is prior art pavement structure schematic diagram；
Attached drawing 3 is road surface set deformation volume with service life variation diagram.
Specific embodiment
Made referring to Figure of description with energy-saving environment protection asphalt pavement structure of the specific embodiment to the utility model
It is explained in detail below.
[embodiment]
The energy-saving environment protection asphalt pavement structure of the present embodiment by anti-fatigue layer 2, waterproof stress release layer 3, under hold
Double-layer 4, upper supporting course 5, abrasion-resistant surface consumption layer 6 form.Anti-fatigue layer 2, waterproof stress release layer 3, lower supporting course 4, upper load-bearing
Layer 5, abrasion-resistant surface consumption layer 6 from bottom to top direct making in the top surface of soil matrix 1.
It according to prognosis traffic volume, is calculated by pavements structural analysis, Pavement Design service life is 40 years, determines that road surface is tied
Structure overall thickness is 42cm (as shown in Fig. 1).
Value of the Composite resilient modulus of 1 top surface of soil matrix at 20 DEG C, 10HZ experimental condition is 267MPa.
Anti-fatigue layer 2 is with a thickness of 7cm, and direct making is in 1 top surface of soil matrix.
Using modified pitch particulate formula dense bitumen mixture, formate gradation composition are as follows:
Standard mesh 19mm percent of pass is 100%, and standard mesh 16mm percent of pass is 96.2%, and standard mesh 13.2mm is logical
Crossing rate is 91.7%, and standard mesh 9.5mm percent of pass is 77.5%, and standard mesh 4.75mm percent of pass is 45.6%, standard screen
Hole 2.36mm percent of pass is 47.3%, and standard mesh 1.18mm percent of pass is 35.2%, and standard mesh 0.6mm percent of pass is
24.8%, standard mesh 0.3mm percent of pass is 17.1%, and standard mesh 0.15mm percent of pass is 13.2%, standard mesh
0.075mm percent of pass is 6.9%.
Used modified asphalt technology index:
Asphalt content: 5.8%；
Voidage: 2.6%；
Stability: 9.3KN；
Flow valuve: 3.7mm；
Void in mineral aggregate: 15.2%；
Pitch saturation degree: 86%；
Structure sheaf dynamic modulus (20 DEG C, 10Hz): 9312MPa.
3 making of waterproof stress release layer is in 2 top surface of anti-fatigue layer, with a thickness of 10cm.
Using grain formula bitumen stability macadam mixture, formate gradation composition in modified pitch open gradation are as follows:
Standard mesh 31.5mm percent of pass is 98.1%, and standard mesh 26.5mm percent of pass is 84.0%, standard mesh
19mm percent of pass is 55.1%, and standard mesh 13.2mm percent of pass is 46.7%, and standard mesh 9.5mm percent of pass is 35.7%,
Standard mesh 4.75mm percent of pass is 19.4%, and standard mesh 2.36mm percent of pass is 15.9%, and standard mesh 1.18mm passes through
Rate is 10.2%, and standard mesh 0.6mm percent of pass is 6.7%, and standard mesh 0.3mm percent of pass is 4.1%, standard mesh
0.15mm percent of pass is 2.6%, and standard mesh 0.075mm percent of pass is 4%~1%.
Modified pitch index is the same as anti-fatigue layer 2.
Asphalt content: 3.4%；
Voidage: 15.7%；
Dynamic modulus (20 DEG C, 10Hz): 8902MPa；
Dynamic stability: 4832 times/mm；
Uniaxial direct tensile cracking resistance number: 906 times；
Coefficient of permeability: 0.4cm/s.
Lower 4 making of supporting course is in 3 top surface of waterproof stress release layer, thickness 11cm.
Using grain formula high stiffness bituminous concrete, formate gradation composition in continuous grading are as follows:
Standard mesh 26.5mm percent of pass is 100%, and standard mesh 19mm percent of pass is 98.9%, and standard mesh 16mm is logical
Crossing rate is 95.1%, and standard mesh 13.2mm percent of pass is 82.3%, and standard mesh 9.5mm percent of pass is 71.9%, standard screen
Hole 4.75mm percent of pass is 62.7%, and standard mesh 2.36mm percent of pass is 31.3%, and standard mesh 1.18mm percent of pass is
18.9%, standard mesh 0.6mm percent of pass is 10.9%, and standard mesh 0.3mm percent of pass is 10%, and standard mesh 0.15mm is logical
Crossing rate is 7.0%, and standard mesh 0.075mm percent of pass is 6.7%.
Used high stiffness bitumen technology index:
Asphalt content: 5.2%；
Voidage: 4.35；
Structure sheaf dynamic modulus (20 DEG C, 10Hz/): 21713MPa；
(10 DEG C, 25Hz) of fatigue test circulations 106It is secondary, strain value: 178 μ ε.
Bulk volume method survey voidage: 2.9%；
Void in mineral aggregate: 15%；
Pitch saturation degree: 80%；
Freeze-thaw split retained strength ratio: 85%；
Wheel tracking test (30000 times, 60 DEG C) rutting depth percentage: 2.7%；
Low-temperature bending failure strain (- 10 DEG C): 2606 μ ε；
Dynamic stability (70 DEG C, 1.0Mpa): 4912 times/mm；
Test (20000 times, 50 DEG C) maximum distortion: 2mm in hamburger.
Upper 5 making of supporting course is in lower 4 top surface of supporting course, thickness 10cm.
Using grain formula high stiffness bituminous concrete, formate gradation composition in continuous grading are as follows:
Standard mesh 19mm percent of pass is 100%, and standard mesh 16mm percent of pass is 93%, and standard mesh 9.5mm passes through
Rate is 78%, and standard mesh 4.75mm percent of pass is 49%, and standard mesh 2.36mm percent of pass range is 32%, standard mesh
0.075mm percent of pass is 7%.
High stiffness bitumen technology is required with lower supporting course 4.
Asphalt content: 5.4%；
Voidage: 4.13%；
Structure sheaf dynamic modulus (20 DEG C, 10Hz): 19634MPa.
(10 DEG C, 25Hz) of fatigue test circulations 106It is secondary, strain value: 216 μ ε.
Abrasion-resistant surface consumes 6 making of layer in upper 5 top surface of supporting course, thickness 4cm.
Using modified pitch gap grading stone mastic asphalt, formate gradation composition are as follows:
Standard mesh 16mm percent of pass range is 100%, and standard mesh 13.2mm percent of pass range is 91.4%, standard screen
Hole 9.5mm percent of pass range is 64.1%, and standard mesh 4.75mm percent of pass range is 27.7%, and standard mesh 2.36mm passes through
Rate range is 21.3%, and standard mesh 1.18mm percent of pass range is 18.2%, and standard mesh 0.6mm percent of pass range is
16%, standard mesh 0.3mm percent of pass range is 14.2%, and standard mesh 0.15mm percent of pass range is 13.4%, standard screen
Hole 0.075mm percent of pass range is 10.6%.
Modified pitch index request is the same as anti-fatigue layer 2.
Asphalt content: 6.1%；
Voidage: 4.2%；
Structure sheaf dynamic modulus (20 DEG C, 10Hz/): 10621MPa；
Dynamic stability (70 DEG C, 1.0Mpa): 4271 times/mm；
Bulk volume method survey voidage: 3.1%；
Void in mineral aggregate: 14%；
Pitch saturation degree: 85%；
Freeze-thaw split retained strength ratio: 90%；
Wheel tracking test (30000 times, 60 DEG C) rutting depth percentage: 3.1%；
Low-temperature bending failure strain (- 10 DEG C): 3126 μ ε；
Dynamic stability (70 DEG C, 1.0Mpa): 4167 times/mm；
Test (20000 times, 50 DEG C) maximum distortion: 4mm in hamburger.
[reference examples]
Pavements structural analysis is carried out according to the same volume of traffic, 15 years conventional pav structure projected lives determined that road surface was tied
Structure overall thickness is 72cm.
As shown in Fig. 2,1 top of soil matrix, it is steady to be followed successively by 18cm cement stabilized macadam base 7,18cm cement from bottom to top
Determine crushed rock base course 8,18cm cement stabilized macadam base 9,8cmAC-25 cutting optimal 10, surface layer 11,4cmSMA-13 in 6cmAC-20
Upper layer 12.
One, economic analysis
Life Cycle Cost Analysis is carried out to two kinds of pavement structures of embodiment and reference examples, width of roadway is 22.5 meters
When, every kilometer of total investment total cost in conventional pav structure (reference examples) 40 years is about 4620.738 ten thousand yuan, the utility model
Pavement structure 40 years in unit always to put into total cost be about 18,810,000 yuan.
Two, energy consumption analysis
Life cycle management energy consumption analysis is carried out to two kinds of pavement structures of embodiment and reference examples, width of roadway is 22.5 meters
When, every kilometer of total energy consumption in conventional pav structure (reference examples) 40 years is about 35128469.22MJ, and equivalent standard coal is about
1506t.It is about 27999820.26MJ that unit in pavement structure 40 years of the utility model, which always puts into total energy consumption, converts into standard
Coal is about 637t.
Three, CO2 emission analysis
Life cycle management emission analysis is carried out to two kinds of pavement structures of embodiment and reference examples, width of roadway is 22.5 meters
When, every kilometer of total discharge in conventional pav structure (reference examples) 40 years is about 4286321kg, the pavement structure of the utility model
Every kilometer of total discharge in 40 years is about 3708132kg.
Four, performance evaluation
Using Current Specification of Asphalt Pavement Design method and MEPDG mechanics empirical method to two kinds of road surfaces of embodiment and reference examples
Carry out structural checking computation analysis:
1, U.S. MEPDG calculation and analysis methods are based on
The structure and material parameter of actual measurement are selected, it is 15mm that analysis, which obtains road surface permanent deformation limits value, such as 3 institute of attached drawing
Show, it is 9.25 that conventional pav structure (reference examples), which reaches limits value, and it is 22.8 that the utility model pavement structure, which reaches limits value,
Year.
2, the pavement structure calculation and analysis methods based on 2017 editions asphalt pavement design criterions
The structure and material parameter of actual measurement are selected, the rutting depth of two kinds of pavement structure forms of embodiment and reference examples is with logical
The development trend of the vehicle time limit, bitumen layer rutting depth estimation results:
Bitumen layer rutting depth estimation results
As can be seen from the above table, conventional pav structure (reference examples) is more than 15mm in the 9th year rutting depth that be open to traffic, and this reality
It is the 15th year with the test specimen that novel road surface structure rutting depth is more than 15mm, anti-rut behavior has obtained significantly being promoted.
Claims (6)
1. a kind of energy-saving environment protection asphalt pavement structure, which is characterized in that the direct making of asphaltic road-mix surface course is in soil matrix
Top surface, the asphaltic road-mix surface course are composed of five layers of asphalt structure sheaf with different function, from bottom to top
It is followed successively by anti-fatigue layer, waterproof stress release layer, lower supporting course, upper supporting course and abrasion-resistant surface consumption layer, anti-fatigue layer, waterproof are answered
The overall thickness that power releasing layer, lower supporting course, upper supporting course and abrasion-resistant surface consume layer is 30~45cm.
2. energy-saving environment protection asphalt pavement structure according to claim 1, which is characterized in that anti-fatigue layer is using thin
Grain formula close-graded modified asphalt mixture, voidage are 2%~3%, with a thickness of 4~8cm.
3. energy-saving environment protection asphalt pavement structure according to claim 1, which is characterized in that waterproof stress release layer
Using grain formula modified pitch stabilization gravel mixture in open gradation, voidage is 12%~17%；Laminate construction thickness be 8~
12cm。
4. energy-saving environment protection asphalt pavement structure according to claim 1, which is characterized in that lower supporting course is using company
Continuous gradation high stiffness bituminous concrete, Laminate construction thickness are 8~12cm.
5. energy-saving environment protection asphalt pavement structure according to claim 1, which is characterized in that upper supporting course is using company
Continuous gradation high stiffness bituminous concrete, Laminate construction thickness are 5~10cm.
6. energy-saving environment protection asphalt pavement structure according to claim 1, which is characterized in that abrasion-resistant surface consumption layer is adopted
With gap grading modified stone mastic asphalt mixture, Laminate construction thickness is 4~6cm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108660889A (en) * | 2018-08-17 | 2018-10-16 | 山东省交通科学研究院 | A kind of energy-saving environment protection asphalt pavement structure |
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| CN108660889A (en) * | 2018-08-17 | 2018-10-16 | 山东省交通科学研究院 | A kind of energy-saving environment protection asphalt pavement structure |
| CN108660889B (en) * | 2018-08-17 | 2024-08-09 | 山东省交通科学研究院 | Energy-saving consumption-reducing environment-friendly asphalt pavement structure |
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