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Surface Texture: The Perception

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Presentation on pavement surface texture for the CalAPA Spring Asphalt Pavement Conference & Equipment Expo, April 20-21, 2016, in Ontario, CA.

Published in: Engineering
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Surface Texture: The Perception

  1. 1. SURFACE TEXTURE: THE PERCEPTION Steven R Marvin, PE CalAPA Pavement Conference April 2016
  2. 2. RESEARCH  When searching for pavement texture  What is the public/owners looking for?  Black and beautiful?  White reflective topping?  Smooth?  Let’s ask Google
  3. 3. GOOGLE PAVEMENT TEXTURE
  4. 4. GOOGLE PAVEMENT TEXTURE
  5. 5. GOOGLE PAVEMENT TEXTURE
  6. 6. GOOGLE PAVEMENT TEXTURE
  7. 7. CHANGE SEARCH PARAMETERS  Asphalt Concrete Texture  More Concrete Pictures  Asphalt Concrete Pavement Texture  Finally Asphalt Concrete Pictures
  8. 8. GOOGLE ASPHALT CONCRETE PAVEMENT SURFACE TEXTURE
  9. 9. GOOGLE ASPHALT CONCRETE PAVEMENT SURFACE TEXTURE
  10. 10. GOOGLE ASPHALT CONCRETE PAVEMENT SURFACE TEXTURE
  11. 11. GOOGLE ASPHALT CONCRETE PAVEMENT SURFACE TEXTURE
  12. 12. GOOGLE ASPHALT CONCRETE PAVEMENT SURFACE TEXTURE
  13. 13. GOOGLE ASPHALT CONCRETE PAVEMENT SURFACE TEXTURE
  14. 14. GOOGLE ASPHALT CONCRETE PAVEMENT SURFACE TEXTURE
  15. 15. WHY THEN DOES ANYONE SELECT ASPHALT CONCRETE?  Appearance?  Apparently not  Smooth ride?  How is that applicable to parking lots?  Constructability?  Cost?  We therefore base our lively hood on being cheap?
  16. 16. WHY DO OWNERS LOOK AT THEIR PAVEMENTS?  Pavement performance is consistent with expectations  Proactive pavement owners  Cities and Counties  State  Airports  Seaports  Commercial property owners  Image driven  Performance/budget driven -
  17. 17. WHY DO OWNERS LOOK AT THEIR PAVEMENTS?  Pavement performance is not consistent with expectations  Government agencies  Commercial property owners/managers  Small property owners  Home owner associations  Attorneys
  18. 18. WHY DO OWNERS LOOK AT THEIR PAVEMENTS?  Pavement appearance is suspect  Attorneys  Attorneys  Attorneys  Attorneys
  19. 19. HOW CLOSELY DO THEY LOOK?
  20. 20. HOW CLOSELY DO THEY LOOK?
  21. 21. HOW CLOSELY DO THEY LOOK?
  22. 22. APPEARANCE  DETAILS DEFINE QUALITY  DETAILS CONTRIBUTE TO SUCCESSFUL PROJECTS  DETAILS SELL THE JOB  DETAILS AVOID LAWSUITS
  23. 23. WHAT DOES NOT DIRECTLY DEFINE APPEARANCE?  Stability  Voids in Mineral Aggregate  Retained Strength  Air Voids  Voids Filled with Bitumen  Binder Content *  Relative Compaction *
  24. 24. WHAT DEFINES SUITABLE APPEARANCE  Roller cuts  Roller checks  Joints  Surface Uniformity  Color  Smoothness  Texture  Design gradation  Material Supplier  ‘apparent’ gradation  Segregation
  25. 25. SO, WHAT IS THE TEXTURE?  What is the texture of asphalt concrete?  Open graded  Dense graded  Exposed aggregate  Rock salt finish  Smooth trowel  Rough broom  Why don’t we ever speak of the texture?
  26. 26. WHAT DO WE SEE?  Color
  27. 27. SIZE  SIEVE SIZES  #4, #8, #16, #30, #40, #50, #80, #100, #200, #270
  28. 28. SANDPAPER  270 grit  200 grit  100 grit  40 grit  Coarse
  29. 29. EMORY CLOTH
  30. 30. MATERIAL SUPPLIERS
  31. 31. MATERIAL HANDLING
  32. 32. MATERIAL HANDLING
  33. 33. MATERIAL HANDLING
  34. 34. AND NOW WE RECYCLE
  35. 35. AND NOW WE RECYCLE
  36. 36. AND NOW WE RECYCLE
  37. 37. AND NOW WE RECYCLE
  38. 38. AND NOW WE RECYCLE
  39. 39. AND NOW WE RECYCLE
  40. 40. AND NOW WE RECYCLE
  41. 41. AND NOW WE RECYCLE
  42. 42. HOW DOES RECYCLE IMPACT APPEARANCE?  All lumps are not created equal
  43. 43. HOW DOES RECYCLE IMPACT APPEARANCE?  Lumps test varies from appearance
  44. 44. HOW DOES RECYCLE IMPACT APPEARANCE?  Solid Center
  45. 45. IMPACT ON APPEARANCE  Quality control is based on extracted gradations  Extractions expose the ‘centers’  Visual perceptions is based on as received gradations  Visual as received conditions remained coated  It is nice to fool mother nature  Understand the variables  Take advantage of the opportunities
  46. 46. WHAT DO WE NEED TO DO?  Accept recycle is here to stay  Recycling has included  Glass  Ceramics  Auto wrecking yard waste
  47. 47. WHAT DO WE NEED TO DO?  Recycling now includes  Rubber tires  Tire rubber  Roofing material  Manufacturer ‘tear offs’  Old roofs  Simple shingles  Built up roofs
  48. 48. WHAT DO WE NEED TO DO?  Crushed Portland cement concrete  Crushed asphalt concrete  Playgrounds  Parking lots  Local roadways  Highways  Airports  Seaports
  49. 49. WHAT DO WE NEED TO DO?  Order surface materials from single source  Single supplier  Single plant  Understand implications of recycled materials  Finish appearances are impacted  10% is different than 15% is different than 20%, etc, etc  Select materials with defined and specified gradations  What is ½” fine with 20% or more recycled materials?
  50. 50. WHAT DO WE NEED TO DO?  Train our people to handle materials properly  Avoid segregation for general paving  Limit use of paver wings  Match auger and screed widths  Proper joint raking  Use aggregate segregation to your advantage  Purposely segregate materials in hand work areas  Use aggregate segregation to our advantage  Discard course materials in hand work areas
  51. 51. WHAT DO WE NEED TO DO?  Raise our understanding  Raise our skills  Change the perception of our product  Change the perception of our industry  RAISE THE PERFORMANCE BAR

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