國(guó)際橡膠瀝青會(huì)議

1、Development of Asphalt Pavement in Jiangsu Expressway,Qian Guochao Deputy director, Ph.D. Jiangsu Provincial Communications Department Nov.2, 2009,Contents,1、General Overview 2、Challenge in Asphalt Pavement 3、Development Pavement Technology 4、Application of New Technique 5、Pavement Quality 6、Conclus

2、ion,On the eastern China coast Where the Yangtze River empties into the sea Area :102,600 sq km Population: 76 millions. GDP 4800$/person Known as a land of fish and rice”,Jiangsu,4,Jiangsu Transportation Investment,In recent 5 years, 206.1 billion RMB was invested in highway and waterway,5,Jiangsu

3、Highways,Jiangsu Expressway,Expressway Development in Jiangsu Province,Time,Expressway Mileage (Km),Built 3000km in past 15 years 3725km till 2008 Expressway Density, No.1 in China,Jiangsu Expressway,4 Lanes 6 Lanes 8 Lanes Other Province,Open Jiangyin Yangzte Bridge Runyang Bridge Nanjing 2rd Bridg

4、e Nanjing 3 Bridge Sutong Bridge 1088m 4 word record Under Construction Taizhou Yangzte Bridge Nanjing 4th Bridge Chongqi Bridge,江蘇代表了中國(guó)跨江大橋建設(shè)的最高水平,Jiangsu Bridges,Sutong Bridge,1088m,Runyang Bridge,1490m,9,Have the most waterway mileage and density in China Inland Waterway 4800km 20% of china Golde

5、n Waterway Yangzte River Jinghang canal Waterway Network in 2020 2 longitudinal 4 transverse Total 3455km,Jiangsu Waterway,10,Jiangsu Ports,Million ton Dock Berth 252 No.1 in China 2007 freight turnover volume 1.05 billion ton No.1 in China standard containers 6.2 M 4.9 times than 2002 2010 Build 5

6、ports of 100M ton standard containers 12 M,11,Jiangsu Railway,Open 850km in 5 years Mileage: 1600km In 5 years 1 hour city group Nanjing, Shanghai and Hangzhou World level Railway network,12,Jiang Civil Aviation,Now 7 Civil Airport 190 fights international 30 Domestic 160 Passenger 10 Millions/y. Ca

7、rgo 200 000t/y. To 2020 Passenger 100 millions/y. Cargo 3.6 millions ton,Contents,1、General Overview 2、Challenge in Asphalt Pavement 3、Development Pavement Technology 4、Application of New Technique 5、Pavement Quality 6、Conclusion,Development of Jiangsu Asphalt Pavement,Three Phases of JS Asphalt Pav

8、ement Phase I（Beginning ） 19922000，1000 km Follow Specification Dealing with pavement premature Damage Usually need Repairing within 3 years Phase II（Developing） 20012005，1880 km SMA，Superpave、AC-S Prolonging service life，no rapairing within 5 years Phase III（Improving） 20062015 OGFC、AR-AC、PA、CTB Sm

9、ooth, Safe, Environment-friendly, Long-life No repairing within 10 years,Challenge in 2000,Shanghai-Nanjing Expressway 248Km open to traffic in 1996 Rehabilitation to 8 lanes in 2005 Heavy Duty Expressway Pavement Premature Failure 19972004 pumping, pothole, revealing Typical Moisture damage,Challen

10、ge in 2000,Xicheng Expressway 35Km,open to traffic in 1999 Beijing-Shanghai Expressway 261Km ,open to traffic in 2000; 18000 Vehicle/Day in 2004 70% truck Pavement Failure After 12 years Revealing, pothole, rutting,Challenge in 2000 for JS Pavement,pavement early damage is very serious Moisture dama

11、ge Rutting The rush hour of construction appeared in 2001 1000 kilometers be-building in every year; 300 kilometers finished in every year. What should we do?,Contents,1、General Overview 2、Challenge in Asphalt Pavement 3、Development Pavement Technology 4、Application of New Technique 5、Pavement Quali

12、ty 6、Conclusion,Asphalt Treated Base,Local Specificationo,asphalt,Aggregate,End Result Specification,Material,Construction,Perpetual Pavement,AC-S,SMA,Structure,Management,Superpave,Compaction,Segregation,Permeability,Porous Asphalt,Pavement Research,Statistical Process Control,Typical Research Proj

13、ect,Research on Prolonging Service Life of Asphalt Pavement Research time: 20012003 Conducted by : Expressway Construction Headquartersof Jiangsu Province, Jiangsu Transportation Research Institute Southeast University Contents: Improving durability of asphalt pavement by researching construction te

14、chnology Establishing local specification of asphalt pavement design and construction which is suitable for Jiangsu Provinces climate and heavy traffic, including design method of asphalt pavement, test method of asphalt and asphalt mixture. Objective: No large-area damage within 5 years,3.1 Optimiz

15、ation of Pavement Structure,Adjustment of HMA Thickness Surface course: 4cm 4-4.5cm Base course: 7cm 8-10cm Binder Course: 5cm 6cm Total HMA Thickness : 16cm 18-20cm Using Dense Mixture Three layers all adopt dense-gradation mixture to improve resistibility of water damage. Increase ratio of thickne

16、ss to NMAS The ratio of layer thickness to Nominal Maximum Aggregate Size is not less than 3 times.,Typical JS Pavement Structure Before 2000,Shanghai-Nanjing Exp. 1996,Wuxi-Jingjiang Exp. 1999,Beijing-Shanghai Exp. 2000,Typical Pavement Structure during 2001-2005,3.2 Mixture Design,Introducing New

17、Mixtures SMA Superpave Improving traditional mixture design method AK13A AK-13S AC-20I AC-20S AC-25I AC-25S,Sup-25,25,SMA,Design Method Marshell compaction 50 blows/Face 75 Blows/Face Design Air Voids:45% Superpave Gyratory Compact 100 SGCS Design Air Voids: 4% Application in Expressway 2500km in Ji

18、angsu Expressway 85% Expressway surface courses are SMA.,Superpave,Technical Progress In 1996, JS Introduce the first sets of Superpave Equipment and technology to Asian JS is the leading Province of Superpave in China Binder Specification JS Adopts in 1999 Superpave Mixture In 2000, build the first

19、 test section In 2005, Superpave is widely used,Superpave,Construction Control More Compaction Water Permeability Pavement Performance More uniform, less segregation Strong Resistant to Rutting The cost is almost the same as AC-I Application in Expressway 1500km in JS Expressway ，2008 Effective tool

20、 to solve pavement early damage.,AC-S Mixture,Traditional AC-I Mixture Gradation rang too wide Less stone to stone contact Cause Pavement segregation Rutting AC-S Mixture Design Idea More stone to stone contact Dense Uniform Application in Expressway It was adopted in construction specification of M

21、inistry of Communications in 2004. 2000 km in JS,Traditional AC25I Gradation,AC-25S Gradation,3.3 Seal Coat and Tack Coat,Seal Coat on CTB Modified Asphalt Emulsion single layer chip seal is adopted. Other Type Asphalt Rubber SAMI Strata Mixture Tack Coat between HMA layers Modified Asphalt Emulsion

22、 Pure asphalt 0.2kg/m20.3kg/m2 Construction using intelligent distributor to spray,3.4 Pavement Compaction,Enhancing compaction energy and using heavy rubber roller; One work section is equipped with: three 25t/30t pneumatic-tired rollers Three 12T+ drum vibratory rollers Compaction standard: Double

23、 control not less than 98% of Marshall sample Theoretical density AC-S, Superpave:93%97% SMA : 94%96.5%.,3.5 Application of Modified Asphalt,Circular track test shows that rutting exists not only in the surface but also in binder course binder course contribute most of rutting deformation In Surface

24、 course and binder course, use SBS modified asphalt to improve the resistance to rutting.,Contribution rate of deformation (%),Surface course Binder course,Asphalt Grade in JS Expressway,Surface and binder course PG70-22 PG76-22 Base course and ATB PG64-22 PG70-22,JS Specifications for 70# Asphalt,R

25、emarks: PG of asphalt is 64-22.,JS Specifications for SBS Modified Asphalt,3.6 Quality Control of Aggregate,Aggregate Admittance System established since 2001. All Suppliers must on the list Equipments Crusher Type Secondary Dust Collect system Improving Aggregate Index Crushing Value in 180 Flat-lo

26、ng particle Content Management Self-checking Spot check Fly check,JS Specification for Coarse Aggregate,JS Specification for Fine Aggregate,Apparent density is not less than 2.60g/cm3; Sand Equivalent is not less than 60% (more than 70% is better).,38,3.7 Pavement segregation Control,Research on Tes

27、ting Method ( first in China,2001） sand patch method Take core method Nuclear gauge infrared camera Guide of Prevention Asphalt Pavement segregation Application Result: moderate/serious segregation in 2001 no segregation /minor in 2005,Compaction level tested by nuclear gauge,JS Test Method of Segre

28、gation (2001),3.8 Water permeability test,JS Permeability index standard is most strict in China Surface course and binder course Permeability index , not more than 50ml/min; Percentage Passing, not less than 90%; Base course Permeability index ,not more than 60ml/min; Percentage Passing, not less t

29、han 80%.,Percent of pass of Water Penetration Coefficient (%),Surface course Binder course Base course,3.9 Strictly Controlling on Asphalt content,National Specification: 0.3% Jiangsu Specification: +0.2%, -0.1%,Contractor Agency America Average,Project Number,3.10 Strengthening Construction Quality

30、 Control,Established local specification Specifications for Construction of Jiangsu Province Expressway Asphalt Pavement Improving the requirement of equipment Batch plant ,320t/h Two similar pavers Non-contact balance beam Applying Statistical Process Control for construction quality Carrying out t

31、hird-party technology consultant for asphalt pavement,43,Statistical Process Control,Statistical Process Control（SPC） Applying SPC to quality control Develop SPC program and chart Defining key index of pavement quality air voids of specimen air voids in field Asphalt content Percentage passing of ke

32、y sieve size VMA Application in Expressway Yanjiang, beltway of Yangzhou, and Yantong Expressway, total 1000km Improving pavement quality apparently.,Third-party Technology Consultant for construction,It is a successful experience in Jiangsu Province. Third-party with Experience Engineers Jiangsu Tr

33、ansportation Research Institute Southeast University Technology consultant Pavement Structure Optimization Technical Training Selection and evaluation of raw material Mix formula Design Quality Assure test during construction Solving technical problem during construction Refine guidance,Contents,1、G

34、eneral Overview 2、Challenge in Asphalt Pavement 3、Development Pavement Technology 4、Application of New Technique 5、Pavement Quality 6、Conclusion,Perpetual Pavement Test Section in Yanjiang Expressway,Function Improving safety in rainy conditions Reducing noise. Porous Aspahlt Pavement 2005, Yantong

35、Expressway 2008, Ninghang Expressway OGFC 2004, Changcheng Expressway,Normal Pavement,OGFC Pavement,Porous Aspahlt Pavement and OGFC,Porous Asphalt Pavement PAC-13,Result of Water Permeation of Porous Asphalt Pavement after watering,Function improves high-temperature stability of mixture. improves m

36、odulus of mixture Test section Yantong Expressway, 2005 14.95 km Asphalt Penetration is 50 Mixture type is AC-25S,Stiff Asphalt,Asphalt rubber Wet process 18% rubber content Application AR-SAMI AR-AC13S AR-OGFC,Asphalt Rubber,Stress Absorption Interayer AR-SAMI,AR-SAMI Asphalt: 2.5kg/m2 Aggregate: 1

37、2kg/m2 Crack Resistance3cm HMA Application Yanhai, 2005 Ningchang, 2007 Ninghang, 2008,Gap-Grade Mixture AR-AC13S,AR-AC13S Gap Gradation High VMA High Asphalt content Coarse Surface Texture.,Jiangsu AR-AC13S,Open Grade Mixture AR-OGFC13S,High asphalt content; Reduce noise up to 5 db Improving safety

38、,Contents,1、General Overview 2、Challenge in Asphalt Pavement 3、Development Pavement Technology 4、Application of New Technique 5、Pavement Quality 6、Conclusion,Pavement Quality After 2001,Pavement Moisture was Eliminated in JS Pavement rutting is under Control Few pavement repair within 8 years.,Fen-G

39、uan Expressway,Open in 2002 85km No repair within 7 years; Average rutting is less than 8mm.,Fen-Guan Expressway,Rutting in 2008, mm,Section,Yan-Jiang Expressway,YanJiang Expressway 113Km, open in 2004 distribute heavy traffic of Hu-Ning Expressway during 20032005 Pavement Condition: good in 5 years

40、; Average rutting is less than 6mm.,Rutting in 2008, mm,Name of segment,Lian-Xu, Ning-Hang and Yanjiang Expressway obtained Tianyou Zhan award of civil engineering Lian-Xu Expressway obtained silver award of national high quality engineering.,Engineering Award,Maintenance Cost,Maintenance Cost Jiangsu Cost = 169 000 RMB/km National Aver. 400 000 RMB/Km JS Expressway : 3725km Cost saving in 2008 860