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Warm Mix Asphalt Yellowstone National Park

Learn about the successful implementation of Advera and Sasobit technologies in a Western Federal Lands Highway Division project in Yellowstone National Park. The project details include mix design, paving specifics, admixture details, and data tested results. Discover the benefits, challenges, and future testing plans for these advanced technologies.

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Warm Mix Asphalt Yellowstone National Park

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  1. Warm Mix AsphaltYellowstone National Park Brad Neitzke Western Federal Lands Highway Division

  2. Project Location

  3. Project Location

  4. Project Details • 11.2 Kilometers / 6.93 Miles • Evaluated 2 technologies • Advera • Sasobit • 28,400 metric tons of mix total • 1/3 of the tonnage per mixture

  5. Final Mixture Quantities • 12,200 metric tons of Control Mix • 8,750 metric tons of Advera Mix • 7,450 metric tons of Sasobit Mix

  6. Mix Design Details • Hveem mix design • 5.3% asphalt content by mix • 1.0% hydrated lime added • 19 mm mix • 12.6% VMA • Superpave mix design • 75 Gyration mix • 5.2% asphalt content by mix • 12.4% VMA

  7. Paving Details • Binder Type – PG 58-34 • Placed in two 2” lifts • Mix Temperature ≈ 325°F • Placement Temperature ≈ 315°F • 90 minute one way haul • 7 vibe passes Ingersoll Rand DD-130 • 3 finish passes Ingersoll Rand SD-77 • Paving started August 21, 2007

  8. Advera Admixture • Added at a rate of 0.3% by weight of mix • Blown in at the plant – Under binder • Initial mix temp ≈ 275°F • Eventual mix temp ≈ 250°F • Same roller pattern • Started paving August 26, 2007

  9. Sasobit Admixture • Added at a rate of 1.5% by weight of binder • Blown in at the plant – Under binder • Used same port as Advera • Initial mix temp ≈ 275°F • Eventual mix temp ≈ 245°F • Same roller pattern • Started paving August 30, 2007

  10. Data Tested for PG 58-34

  11. Mixture Locations

  12. Density Comparison • Control Mixture • Average = 93.2% s = 1.066 • Advera Mixture • Average = 93.9% s = 1.395 • Sasobit Mixture • Average = 93.4% s = 1.157

  13. What Have We Learned • Field density achieved in all cases • Saved ≈ 20% in fuel at the plant • Temperature at plant hard to regulate • Mix handled similarly • Workers noted no handling difficulties • No smoke • Additives don’t seem to affect mix design • Sasobit stiffens binder

  14. What’s Next • More testing by WFLHD • Volumetrics • Recovered asphalt properties • TSR • Rut (Hamburg and APA) • Field monitor • WRI testing and evaluation • FHWA Field Lab data / report

  15. Comments to the TWG • Focus on items for success • Good paving practices • Performance analysis for equal evaluation • Only one chance

  16. QUESTIONS???? Email: brad.neitzke@fhwa.dot.gov 360.619.7725

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