2016.05 1 Overview
2 Structure Design of Asphalt Pavement
3 Material Design of Asphalt Pavement
4 Typical Cases During Flight Closure 1989 Shanghai Hongqiao Airport 1991,1993 Nanjing, Guilin, Xi’ning 1994 Xiamen 1996 Beijing Capital Airport- Eastern Runway 1998 Zhanjiang, Hongqiao 2000 Beijing Capital Airport- West Runway, Xi’ning 2001 Harbin, Dunhuang 2002 Tianjin 2003 Dalian 2004 Kunming, Karamay 2005 Luzhou, Tacheng 2006 Hongqiao, Qingdao, Yan’an 2007- Changsha, Xiamen, Lijiang, Xining, Tongliao, Mangshi, Shenyang, Urumqi, Xi’an, Lhasa, Mudanjiang, Hongqiao, Kunming, Lvliang, Chongqing, Beijing…… To be built：Chengdu, Beijing, Tianjin, Baoshan, Zhaotong……
Asphalt Runway in China 1 Overview
2 Structure Design of Asphalt Pavement
3 Materials Design of Asphalt Pavement
4 Typical Cases During Flight Closure
FAA Method—Program: F806FAA.xls, etc. USACE Empirical Method Empirical Methods Japan Method (CBR) CDOT Method France Method Design Methods of China Method Airport Asphalt Pavement AI Method—Program: CP-3 FAA-Elastic layered system method—Program: LEDFAA Mechanistic-Empirical USACE-Elastic layered system method ( Elastic Layered System) Shell Method—Program: BISAR3.0 Australia Method—Program: APSDS Holland Method—Program: PAVER Basis Key Core
Pavement evaluation Overlay decision Overlay design
Methods Indexes PCI, SCI, Cracks, Corner break, Damage condition Damage investigation Settlement, Faulting, Jiont seal damage, Spalling…… Void, Load transfer capacity, Structure HWD/Coring Thickness, ACN-PCN, Modulus, Remain life……
Roughness/ Skid/ IRI, Friction coefficient, Function Drainage Slope……
Thickness, Gradation, Materials Coring test Strength, Modulus…… Pavement performance Overlay decision
Structural overlay Functional overlay
Process
Technical level Management
- Bearing capacity - Maintenance funds
- Damage condition - Non-suspending
- Roughness - Runway upgrade
- Skid-resistance - General planning
- Drainage capacity - ……
F=(0.08534×ns/100-0.3594×K0+106.2946)/100
1.000 1.000 1.000 0.990 0.990 0.9900.985 0.960 0.945 0.930 0.910 0.900 0.900 0.900 0.900 0.900 0.885
0.855 0.835
0.810 F 0.800 0.800 0.800 0.805
0.760 0.745
0.700 0.700 0.691
0.600 0.600 0.0 25.0 50.0 75.0 100.0 3 土基反应模量K0（MN/m ）
年起飞架次1200 年起飞架次3000 年起飞架次6000 年起飞架次15000 年起飞架次25000 www.wondershare.com Prevent reflecting Non-suspending Base treatment 1 2 cracks 3 construction
Repair the old pavement Stress absorbing layer, geotextile, PMB felt…… Proper thickness Cutting between pavement and shoulder ……
SAMI Skid, rutting, aging, SMA-Wearing layer water damage
Reflecting crack Glass grid/ Tack coat and adhesion
Rutting, waterproof, PMB AC-20 durability, cracking Existing pavement (one or two layers)
Reflecting crack, Prime coat/ APP / SAMI / waterproof and adhesion Geotextile……
Existing rigid pavement
Foundation（Grouting） 1 Overview
2 Structure Design of Asphalt Pavement
3 Materials Design of Asphalt Pavement
4 Typical Cases During Flight Closure
Ray Brown(NCAT): “China is the leader in the use of SMA on airfields.”-AAPTP 04-04 ,NCAT Revision of ICAO ADM Part 3 involved China practice of SMA Applied to the Eastern Runway of Beijing INT’L Airport successfully in 1996 Widely used in airport overlay Over forty airport cases (Beijing, Harbin, Qingdao, etc.) The mainstream of asphalt surface for good performance
www.wondershare.com 1. Different load features Highway Civil aviation High tire pressure, heavy load, high speed, Low tire pressure, light load, large number impulse effect, mix traffic, little fatigue repetitions, channel traffic, low speed…… damage, unfavorable loading in waiting area……
2. More restricted demands for skid, roughness and Foreign Object Damage Highway: Climate partition, PI, Dynamic viscosity at 60 , Remained Binder ductility, Softening point, Weight loss, Remained penetration ℃ Airport: Equivalent softening point and Fraass, Ductility at 10 , viscosity at 60 PMB ℃ Highway：PI, Ductility at 5 , Kinematic Viscosity at 135 ℃ Range of air voids, Min allowable℃ asphalt content, Marshall℃ Stability and SMA Mixture Flow, Leakage, Dynamic rutting stability and Tensile Strength Ratio, etc.
Performance Requirement of Airport
Adaptable to high stress fatigue load Excellent cracking resistance
High shear strength Compact, skid resistant, smooth surface Background
Built in 1954 3800m×60m Asphalt overlaid in 1996 Performs well under heavy load Success experience Preventing reflection SMA asphalt mixture design cracks Material selecting Repairing old pavements SBS + PE composite Use APP modified modification asphalt felt Addition of Fibers （JRS－ Proper thickness VIATOP 66,0.3%） Joint cutting between Gradation design pavement and shoulder Mixture performance testing …… ……
PCI 值 Pavement Condition Index
Evaluation Results of 2007 100 90 80 70 PCI: Excellent except the north end 60 50 PCI 40 IRI: 1.84 mm 30 20 10 0 ISM: Except the north end 1 5 9 13 17 21 25 29 33 37 41 45 49 53 调查单元（个） 方向：北-南 ： Performance of Mix Perfect Cantabro Abrasion Test Before test After test Position No. Damage（％） Average ： （g） （g） Structural life 9years 5＃ 1233.4 1116.5 9.5 ＃ ZProfile CAPSNW2, IRI(Total Length) = 1.9231 6 1125.6 874.6 22.3 34.8 7＃-1 1201.0 328.8 72.6 North 4.0 4.0 5＃ 1215.2 1062.3 12.6 end 3.5 3.5 6＃ 1214.9 454.5 62.6 20.7 3.0 3.0 9＃ 1226.0 1179.3 3.8 2.5 2.5 10＃ 1233.2 1188.1 3.7 2.0 2.0 14＃ 1112.6 1049.2 5.7 1.5 1.5 Middle 22＃ 1260.7 1230.8 2.4 1.0 1.0 4.1 and 24＃ 1263.7 1211.0 4.2 0.5 0.5 South 20＃ 1245.9 1201.6 3.6 0.0 0.0 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 end 21＃ 1262.6 1222.5 3.2 3.3 Section 100 (m) 22＃ 1263.4 1223.2 3.2 1 Overview
2 Structure Design of Asphalt Pavement
3 Materials Design of Asphalt Pavement
4 Typical Cases During Flight Closure
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www.wondershare.com Background
Built in 1985 3200m×60m Asphalt overlaid in 2013 Performs well under high temperature climate Related Research Monitoring system
Data collection, detection and transmission system Background
Opened in 1990 4000m×45m Asphalt overlaid in 2010 High plateau airport with strong ultraviolet radiation Related Research
Before After
Foundation void changes
The importance of grouting To avoid further deterioration of pavement The requirements for guaranteeing flight safety Reduce the pavement maintenance and repair workload Necessary work before overlay…… Related Research
The serious problem of technology in plateau area
02 03 01 Temperature Adhesion Ageing-resistant performance property performance Accelerated Simulation Experiment
Performance Evaluation
• Different asphalt, modified agent and anti-aging additives • Comparison of fatigue performance, adhesion performance, rheological property and low temperature cracking
The preferred choice of modified asphalt Suggestions on the selection of light stabilizer can capture free radicals…… Performance Verification
Stress
Strain
） MPa （ Composite modulus Frequency Comparison of rheological properties strain energy density
Sample code Comparison of low temperature anti cracking performance