Methods of Rehabilitating Pavements with Moisture Damaged Asphalt Layers: Technical Report

Moisture damage to old hot mix asphalt layers can result in surface cracking and greatly reduce the life of any new asphalt overlay. Buried moisture damage, generally called stripping, in asphalt layers can often go undetected, resulting in new overlays not reaching their design life. Conventional wisdom is to mill down to solid HMA and then place full depth new HMA. This strategy is costly and means that several inches of good materials will be sent to reclaimed asphalt pavement stockpiles. Recent developments for cold in-place recycling (CIR) and cold central-plant recycling (CCPR) technologies can be considered for addressing moisture-damaged asphalt layers by recycling the existing material in place to create a structurally sound asphalt treated base layer. Through a thorough literature review, field sampling and testing, a comprehensive lab study, and evaluation of pavement design alternatives, this project identified lab methods to determine treatment options, documented binder type and temperature influences on material properties, used lab properties to predict pavement performance, and recommended special specification updates for use on future CIR or CCPR projects. These methods and specification updates should be considered to explore developing recycling options for identified moisture-damaged pavement sections.

• Record URL:
  https://static.tti.tamu.edu/tti.tamu.edu/documents/0-6926-R1.pdf
• 
• Summary URL:
  https://library.ctr.utexas.edu/Presto/catalogid=36525
• Summary URL:
  https://rosap.ntl.bts.gov/view/dot/66052
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/60984
• Corporate Authors:

  Texas A&M Transportation Institute

  Texas A&M University System
  3135 TAMU
  College Station, TX  United States  77843-3135

  Texas Department of Transportation

  Research and Technology Implementation Office
  125 E 11th Street
  Austin, TX  United States  78701-2483

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Im, Soohyok
  • Sebesta, Stephen
  • Rew, Younho
• Publication Date: 2018-11

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 94p

Subject/Index Terms

• TRT Terms: Cold in-place recycling; Field tests; Hot mix asphalt; Laboratory studies; Moisture damage; Pavement design; Pavement performance; Rehabilitation; Specifications; Stripping (Pavements)
• Subject Areas: Construction; Design; Highways; Maintenance and Preservation; Pavements;

Filing Info

• Accession Number: 01688432
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-18/0-6926-R1, 0-6926-R1
• Contract Numbers: 0-6926
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Dec 14 2018 9:32AM