Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

ReGen-erating Aged Binder

159 views

Published on

This presentation focuses on the decreasing quality and life of asphalt pavements in the United States, and what the asphalt industry can do to improve sustained age-resistance in our paving materials.

Published in: Engineering
  • DOWNLOAD FULL BOOKS, INTO AVAILABLE FORMAT ......................................................................................................................... ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/yxufevpm } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/yxufevpm } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/yxufevpm } ......................................................................................................................... 1.DOWNLOAD FULL. PDF EBOOK here { https://tinyurl.com/yxufevpm } ......................................................................................................................... 1.DOWNLOAD FULL. EPUB Ebook here { https://tinyurl.com/yxufevpm } ......................................................................................................................... 1.DOWNLOAD FULL. doc Ebook here { https://tinyurl.com/yxufevpm } ......................................................................................................................... ......................................................................................................................... ......................................................................................................................... .............. Browse by Genre Available eBooks ......................................................................................................................... Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult,
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Be the first to like this

ReGen-erating Aged Binder

  1. 1. ReGen-erating Aged Binder Virginia Pavement Research & Innovation Symposium 6-19-2019 R. Grover Allen, Ph.D., P.E.
  2. 2. 2 Recent Decline in Pavement Quality Associated with RAP/RAS Recycling Responsibility. Asphalt Institute, 9/17 During the last decade, the quality/life of asphalt pavements in U.S. have DECREASED. One state reported a DECREASE in pavement life of about 4 YEARS Opinion: Issues with cracking stem from improper use of RAP/RAS
  3. 3. 3
  4. 4. 4 Asphalt Concrete Pavement Performance 2.25 million miles of asphalt-paved roads in the U.S. alone. ➢ Average rating is D- ➢ 1/5 miles in Poor condition ➢ Annual backlog $80B
  5. 5. 5 Huber, AMAP 2019
  6. 6. 6 Starting with Aged (RAP) Binder (20% avg) Multi-source RAP pile (RAP Best Practices. NCAT 2010.) QIP-129 (NAPA 2015)
  7. 7. 7 Re-using Aged Asphalt Assumed! New Mixture Aged Mixture New Mixture?
  8. 8. 8 Different approach to RAP: Japan: US: Binder quality: Waste/Very Poor Good enough to replace virgin binder Binder upgrade: Mandatory (“rejuvenation”) None required/ “soften” virgin binder Method: Mandatory E/R/Testing No RAP binder testing required Winning Bid: Lowest Life-cycle Cost Lowest Initial cost Warranty: Mandatory/Long-term Rare/Short (<2 yrs)/None 40 years ago…RAP becomes common in the US and Japan NAPA. Info Series 139 (2015) - High RAP Asphalt Pavements. Japan Practice – Lessons Learned. Present Day: Japan: US: Avg RAP = 47% Avg RAP = 20% 97% roads in Good condition 30% roads in Good condition 20% roads in Poor condition $80 billion annual backlog
  9. 9. 9
  10. 10. 10 RAP + ReGen® (after heat) RAP (after heat) Aged Asphalt Binder (from RAP) Currently approved in most states to replace up to 20% of required binder in mix.
  11. 11. 11 RAS + Virgin Aggregates (after heat) RAS + ReGen® + Virgin Aggregates (after heat) Aged Asphalt Binder (from RAS) Currently approved in many states to replace up to 20% of required binder in mix.
  12. 12. 12 Better Handling/Constructability
  13. 13. 13
  14. 14. 14 Superior Mix Fatigue Resistance (Fatigue-Resistant Bottom AC Layer) 25X
  15. 15. 15
  16. 16. 16 Sustained Age-Resistance 30% RAP + ReGen® > PG 67-22 60% RAP + ReGen ® > 30% RAP “Bottom-grade” with aging time PG 67 “-22”
  17. 17. 17 ReGen Plant Mix Performance • Volumetrics • Asphalt %, RBR (AASHTO M323, FM 5-563) • Bulk, Max SG (Gmb; Gmm), (FM 1-T 166; FM 1-T 209) • AV (%), AASHTO T 289 • Mix Performance • Rutting (Hamburg @ 50C, AASHTO T324) • Cracking (Illinois Flexibility Test, I-FIT @ 25C) • Durability (R30 LTOA + Cantabro Mass loss %, AASHTO TP 108) • Conclusions • 45% and 60% RAP + ReGen® mixtures: ✓ met all volumetric requirements ✓ matched mix performance of control ✓ Lower mix cost than control 45% RAP + ReGen Customer impressed by “wet” appearance compared to RAP control mixture. 60% RAP + ReGen® 45% RAP + ReGen®
  18. 18. 18 High % RAP + ReGen® Constructability 50% RAP + ReGen®
  19. 19. Thank You from Blacklidge! R. Grover Allen, Ph.D, P.E. Technical Director gallen@be-inc.com

×