Performance of Interstate 35 Owatonna, MN January 27, 2003

Transcription

1 Performance of Interstate 35 Owatonna, MN January 27, 2003 William J. Zerfas, PE Minnesota Department of Transportation

2 Minnesota

3 THIS IS MINNESOTA

4 BUT SO IS THIS

5 Some Minnesota Facts Home of: The Nation s Largest Shopping Complex 22 Time World Series Champions 44 Time Super Bowl Losers 2002 NCAA Men s Hockey, Golf & Wrestling Champions Might Ducks, Grumpy Old Men and Fargo World s First Enclosed Mall (Southdale) Mayo Clinic, Rochester Minnesota Inventions: 11,842 Lakes Masking & Scotch Tape The Former Wrestling Governor Post-It Notes Cream of Wheat Cereal Wheaties Cereal Thinsulate Green Giant Vegetables Minnesota has: In-line Skates (Rollerblades) More Golfers Per Capita than any other State More Shoreline than California, Florida & Hawaii - Combined

6 Minnesota s Road System 135,300 Miles (217,740 km) of Streets and Roads! 56,100 Miles (90,280 km) Paved Surfaced Roads! 71,700 Miles (115,390 km) of Aggregate Surfaced Roads! 7,500 Miles (12,070 km) Non-Surfaced Roads 11,900 Miles (19,150 km) of State Highways OWATONNA

7 Surfacing Annual Statewide Pavement Expenditures Hot Mixed Asphalt (HMA) - $290M Portland Cement Concrete (PCC) - $65M Research activities 0.7% of annual expenditures! Base, subgrade, pavement preservation, drainage, and maintenance not included.

8 Mn/ROAD Office of Materials and Road Research A long-term pavement testing facility that gives researchers a unique, real-life laboratory to study and evaluate the performance of materials used in roadway construction. Visit the Mn/ROAD Web Site at

9 Mainline - I-94 Westbound Asphalt Concrete Hot Mix Asphalt SuperPave Overlay (1997) Jointed Plain Concrete Whitetopping (1997) Low Volume Road Hot Mix Asphalt SuperPave (1999) Cold Mix Asphalt (1999) Jointed Plain Concrete

10 Traffic Loadings Low Volume Road Traffic Mn/ROAD 5-axle Semi 80,000 lb. Inside Lane = 4 days/week 102,000 lb. Outside Lane = 1 day/week Mainline Traffic Public I-94 Traffic 25,000 Vehicles/Day 12.5% Trucks 3.6 Million Flexible ESALS 5.5 Million Rigid ESALS 134,000 Flexible & 212,000 Rigid ESALS

11 Pavement Condition Evaluation Pavement Management Van In-Situ testing Falling Weight Deflectometer (FWD) Ground Penetration Radar (GPR) Friction Testing Forensic Testing

12 Mn/DOT Pavement Condition Indices Index Name Present Serviceability Rating (PSR) Surface Rating (SR) Pavement Quality Index (PQI) Pavement Attribute Rating Measured Scale Pavement Roughness Pavement Distress Overall Pavement Quality 0 4.5

13 I-35 : Design Guidelines Interstate 35 Design ESALs = 16,000,000 ADT (1988) = 14,791 ADT (2008) = 22,255 Heavy Commercial = 22% Existing pavement was 9 PCC Raise Grade, Break & Seat PCC

14 I-35 : Owatonna, MN Project Background:! 8¾ miles of reconstructed southbound and northbound I-35. I (35 lane miles)! Removal & Reconstruction of 4 bridges over I-35. I! Removal & Reconstruction of 2 box culverts below I-35. I! Reconstruction of frontage roads on both sides of I-35. I

15 General Contractor: Awarded to Buffalo Bituminous Company for $16,000,000. Project Included:! Over 1,000,000 cu. yd. of Excavation.! Over 235,000 sq. yd. of bitum. milling.! Over 275,000 tons of bituminous placed.! 1,763 road stations of rumble strips.

16 CONSTRUCTION: Stage 1: Southbound Lanes 1995 Stage 2: Northbound Lanes 1996 TYPICAL CROSS SECTION:! Two 12-ft. lanes, 10-ft. outside shoulder, 4-ft. inside shoulder, slope.! 1 ½-in. ½ wear course, 2 ½-in. ½ binder course, 5-in. 5 base course, 4-in. 4 PASB, 2-2 in. aggregate base.

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29 WHY USE A MODIFIED ASPHALT? Stage 1: Southbound Traffic (1995)!7¼ 7¼ miles of conventional HMA with 100 saw and seal control joints.!¾ ¾ miles of conventional HMA mix, with saw and seal control joints at 40, 60 and no joints.!¾ ¾ miles of wear course mix with polymer modified PG binder and saw and seal at 40, 60 and no joints. Can modified asphalt eliminate the need for saw and sealed joints?

30 Introduce Superpave Advantages of I-35. I! Interstate Highway with high ADT.! Successful use of polymer modified PG asphalt binder on SB lanes.! Apples-to to-apples comparison between SB & NB traffic lanes.! Partnership of Players: " Mn/DOT " Contractors " Koch " FHWA

31 Research Objectives Rut Resistance. Thermal (Transverse) Cracking.! Saw and Seal Joints.! No Saw and Seal Joints. Pavement Structure.! Same structure below top 4 of Superpave as Southbound lanes. Pavement Maintenance.

32 Changes for Superpave Aggregate: local aggregate did not meet Superpave specifications.! New Ulm Quartzite chosen aggregate. Testing Procedures Defined.! On-Site Mn/DOT laboratory.! QA / QC procedures established. Asphalt Binder.! SBS Polymer Modified PG Asphalt Binder! Same binder used in SB lanes.

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35 Cost Modifications Mn/DOT issued change by Supplemental Agreement. Total Added Cost of S.A. = $478,000! Superpave Quantity = 28,440 tons (English) at $15/ton incremental cost.! Modified Asphalt Binder was 34% of the cost for the Superpave Mix.! Other Costs Included: Aggregate Source & Materials. Additional Testing Requirements. Additional Paint.

36 Research Established 7 Test Sections in both the Southbound and Northbound direction.! Study Asphalt Binders Used.! Study Effectiveness of Saw and Seal.! Study Long Term Effects on Ride and Structural Quality with Pavement Management Division.

37 Research Activities Post-Construction Activities! 500-ft. Crack Monitor Stations! Friction Testing! FWD (falling weight deflectomer) Testing! Cores for In-Place Voids Testing! Pavement Management Recordings " Rut measurements using Dipstick. " Cracking (distress measurements) " Structural Rating (SR) " Ride Quality (PQI)

38 Southbound Performance Early rutting issues. Transverse (Thermal) Cracks.! Saw & Seal Sections AVG = 20 L.F. of cracks per 500-ft. station.! Non Saw & Seal Sections AVG = 203½ L.F. of cracks per 500-ft. station. Increase cracking of 72% between 2000 & Outside Shoulders have 350 L.F. of cracks. Ride Performance.! PSR = 3.25

39 Northbound Performance Minimal Rutting. Transverse (Thermal) Cracks.! Saw & Seal Sections No Cracks Observed! Non Saw & Seal Sections No Cracks Observed Shoulder developed 167 L.F. of transverse cracks Ride Performance.! PSR = 3.5 Slightly better friction numbers than Southbound lanes.

40 PG Extraction WEAR COURSE CORES NORTHBOUND SUPERPAVE Core # 1-1/2-1 Lab # 648 Asphalt Cement % 4.86 High PG Grade 66.1 Low PG Grade / / AVERAGE - NORTHBOUND WEAR COURSE CORES SOUTHBOUND Mn/DOT TYPE / / AVERAGE - SOUTHBOUND

41 PG Extraction BINDER COURSE CORES NORTHBOUND SUPERPAVE Core # 1-2/2-2 Lab # 649 Asphalt Cement % 5.08 High PG Grade 62.9 Low PG Grade / / AVERAGE NORTHBOUND BINDER COURSE CORES SOUTHBOUND Mn/DOT TYPE / / AVERAGE - SOUTHBOUND

42 SUMMARY Northbound Superpave with Polymer Modified Asphalt Binder has:! Better Ride & Structural Rating.! Less Rutting.! Less Transverse (Thermal) Cracking.! Better Aging Characteristics.! Higher Friction Numbers. Minnesota is currently not sawing and sealing transverse joints in Superpave Pavements.

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49 10.00 I-35: OWATONNA NORTHBOUND - SUPERPAVE SOUTHBOUND - TYPE Air Voids (%) st lift (1.5") 2nd lift (2.5") 1st lift (1.5") 2nd lift (2.5") 1st lift (1.5") 2nd lift (2.5") 1st lift (1.5") 2nd lift (2.5") 1st lift (1.5") 2nd lift (2.5") wheelpath between wheelpath wheelpath wheelpath between wheelpath Original value 2000 value 2002 value

50 I-35: NORTHBOUND PERFORMANCE PLOT 5 SECTION INDEX PERFORMANCE PLOT 4 PSR = 3.5 PSRp Index 3 SRp* 2 PSRh 1 Last Rehab: 1999 Crack Repair SRh Base yr

51 I-35: SOUTHBOUND PERFORMANCE PLOT SECTION INDEX PERFORMANCE PLOT 5 4 PSR = 3.25 PSRp Index 3 SRp* 2 PSRh 1 Last Rehab: 1999 Crack Repair SRh Base yr /12/20 Year Section:IS D

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