Comprehensive Evaluation of Warm-Mix Asphalt Moisture Susceptibility

The Ministry of Transportation of Ontario (MTO) has implemented optional use of Warm Mix Asphalt (WMA) technology on Ontario’s highways and roads since 2012. Many types of WMA technologies have been successfully used to produce and place over one million tonnes of WMA in Ontario’s provincial highways to date with proven environmental, economical and safety benefits. However, there are still concerns with moisture resistance of WMA mixes due to lowered production and placement temperatures.To address the aforementioned concern, MTO and the Centre for Pavement and Transportation Technology (CPATT) at the University of Waterloo have partnered under MTO’s Highway Infrastructure Innovation Funding Program (HIIFP) to evaluate the moisture susceptibility of WMA through a laboratory testing program. The program includes Hamburg wheel tracking test, tensile strength ratio (TSR) using two conditioning methods of Moisture Induced Stress Tester (MIST) and AASHTO T283, and stripping by static immersion tests.Mixtures for this study were produced using two Performance Graded Asphalt Cement (PGAC) sources, three types of WMA additives, and two aggregate types. This paper presents the laboratory test results and evaluates the effects of several WMA additives on moisture resistance of typical Ontario Superpave mixes. The paper further attempts to determine if there is any correlation between the results from the Hamburg test, TSR, and static immersion test.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFK40 Standing Committee on Surface Requirements of Asphalt Mixtures.
• Authors:
  • Varamini, Sina
  • Salehi Ashani, Saeid
  • Tighe, Susan L
• Conference:
  • Transportation Research Board 97th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2018-1-7 to 2018-1-11
• Date: 2018

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 17p

Subject/Index Terms

• TRT Terms: Laboratory tests; Moisture content; Warm mix paving mixtures
• Geographic Terms: Ontario, Canada
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01661483
• Record Type: Publication
• Report/Paper Numbers: 18-03082
• Files: TRIS, TRB, ATRI
• Created Date: Feb 28 2018 9:26AM