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Ultra Thin Bonded Wearing Coarse

Ultra Thin Bonded Wearing Coarse. Sponsored by: Minnesota LTAP Center Presented by: Michael Marti, P.E. SRF Consulting Group, Inc. Dan Wegman, P.E. SemMaterials. A little history. 1988 - First Trial in France 1992 - Introduced in U.S 1992 - Jobs in TX & AL 1993 - Jobs in NJ & PA

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Ultra Thin Bonded Wearing Coarse

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  1. Ultra Thin Bonded Wearing Coarse Sponsored by:Minnesota LTAPCenter Presented by:Michael Marti, P.E. SRF Consulting Group, Inc. Dan Wegman, P.E. SemMaterials

  2. A little history. . . • 1988 - First Trial in France • 1992 - Introduced in U.S • 1992 - Jobs in TX & AL • 1993 - Jobs in NJ & PA • 1999 - Jobs in MN

  3. Ultra Thin Bonded Wearing Coarse What is it? • Surface Treatment • Preventive Maintenance • Corrective Maintenance (Surface Rehabilitation) • Single Pass System • Emulsion membrane • Thin gap-graded hot mix • Placed with Special Equipment

  4. Spray Novabond 3 Processes Lay Hot Mix Smooth the Mat Ultra Thin Bonded Wearing CoarseMachine Specially Engineered Application of membrane Application of HMA

  5. Ultra Thin Bonded Wearing Coarse:The Process The Novabond Cures, Bonding the HMA to the Pavement Total 9/16” Depth of Mix Surface of Mix Coating on mix 3/8” Agg Size 3/16” Membrane Existing Pavement

  6. Polymer Modified Membrane • Sprays easily • Cures quickly • Superior bonding

  7. Ultra Thin Bonded Wearing Coarse HMA • High quality aggregate • Restores & retains friction • Gap-graded • Reduces noise • Reduces backspray • Mix designed specially for process

  8. Ultra Thin Bonded Wearing CoarseBinder • Polymer modified binder • Less draindown • More forgiving (less sensitive to temp, etc.) • Quicker traffic return • Sticks better, less water sensitivity • Better cracking resistance • More durable

  9. Application rates • Emulsion membrane • 0.15 - 0.3 gal/yd2 • Ultra-thin hot mix asphalt overlay • Type A - 45-55 #/yd2 • Type B - 50-65 #/yd2 • Type C - 55-80+ #/yd2 • Total thickness: 3/8 to 3/4”

  10. Rolling & Return to Traffic • Rolling only to seat aggregate • Return to traffic in 10-20 minutes

  11. Ultra Thin Bonded Wearing CoarseConstruction Advantages • Quick to apply • Reopens to traffic quickly • Cost effective

  12. Performance • Resists wear & rutting • High skid resistance • Reduced tire splash, hydroplaning • Reduced tire noise • Seals out water • No loose aggregate • Thinner lift • reduces applied weights • overhead clearance, curb reveal & drainage profiles • maximizes use of expensive aggregates

  13. Greater visibility on Ultra Thin Bonded Wearing Coarse surface Backspray from dense graded surface Reduced BacksprayWisconsin project - 5000 ADT

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