$18 Million Benefits of Using Ground Tire Rubber In Asphalt: Eleven Years of Success George Way, P.E. Arizona DOT.

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Presentation transcript:

$18 Million Benefits of Using Ground Tire Rubber In Asphalt: Eleven Years of Success George Way, P.E. Arizona DOT

Flagstaff I-40 Elev Meters 254 cm of snow Lowest Temp. -31 C

I-40 Traffic 20,000 VPD 35% Trucks 2.3 million ESAL’s/Year

Riordan Project Built cm HMA 15 cm Perm HMA 15 cm Drainable AB

RIORDAN CROSS SECTION 28 cm AC 15 cm BTB 10 cm AB Eng. Fabric Sub Grade

Built cm PCCP 18 cm CTB Clay/Cinder Subgrade

I-40 Pavement Badly Cracked Rough Ride High Maintenance

Flagstaff Overlay Crack & Seat 7.5 cm HMA 5 cm AR-HMA 1.25 cm AR-OGFC

FLAGSTAFF CROSS SECTION 1.25 cm AR-OGFC 5 cm AR-AC 7.5 cm AC PCCP Crack & Seat Sub Grade

# 200 # 100 # 50 # 40 # 30 # 16 # 10 # 8 # 4 1/4” 3/8” 1/2” 3/4”

Asphalt Rubber 80 % Asphalt 20 % Ground Tire Rubber

Percent Binder 4.6% HMA/AC % AR-HMA 9.0% AR-OGFC

Metric Ton of Mix

HMA-Asphalt Binder AC-20 PG 64-16

Asphalt Rubber Binder AC-10 PG 58-22

SHRP SPS-6 National Overlay Study Focus on Thickness 10 cm & 20 cm HMA Overlay

SHRP SPS-6 Overlay PCCP 20 cm HMA 10 cm HMA 5 cm AR-HMA/5 cm HMA

Cracking Flagstaff ARFlagstaff AR RiordanRiordan

Cracking in Meters

Percent Cracking

Benefits of AR $18 million savings Four Years Less Construction Time

Implementation Over 2,500 miles of AR projects built since 1990