Evaluation of warm mix asphalt using the Mechanistic-Empirical Pavement Design Guide

This paper summarizes a recently completed field and laboratory evaluation of warm mix asphalt based on performance testing results. The field study incorporated asphalt mixture samples procured from four different Iowa Department of Transportation (IDOT) projects for a total of eight different field produced mixes, four WMA mixes and four HMA mixes. There was one HMA control mix and one WMA mix for each project. Dynamic modulus tests were performed on these samples and a statistical analysis showed differences when comparing WMA and HMA. The main objective of this paper is to investigate how the differences found in the dynamic modulus tests correlate to actual field performance using the Mechanistic-Empirical Pavement Design Guide (MEPDG). The MEPDG is a pavement design software that utilizes dynamic modulus laboratory data to predict performance in the field, at a user specified design reliability, based on traffic, climate and material inputs. The dynamic modulus data is used as an input to the MEPDG model in order to calculate predicted pavement performance. The results show that for certain mixes, there may be statistical evidence of a difference in long term pavement performance based on the HMA MEPDG output compared with the WMA MEPDG output. The analysis shows statistical differences in the laboratory dynamic modulus data and these differences correspond well with the MEPDG analysis.

• Authors:
  • Buss, A
  • Williams, R C
• Conference:
  • Seventh International Conference on Maintenance and Rehabilitation of Pavements and Technological Control
  • Location: Auckland , New Zealand
  • Date: 2012-8-28 to 2012-8-30
• Publication Date: 2012-8

Language

• English

Media Info

• Pagination: 10p
• Serial:
  • Issue Number: 00046

Subject/Index Terms

• TRT Terms: Field tests; Hot mix asphalt; Laboratory tests; Pavement design; Pavement performance; Warm mix paving mixtures
• Uncontrolled Terms: Design guide; Pavement technology
• ATRI Terms: Design guide; Field test; Hot mix; Laboratory test; Pavement design; Pavement performance; Warm mix
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 01453641
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Nov 13 2012 4:59PM