Effect of Various Warm-Mix Technologies on the Stiffness and Rutting Characteristics of Asphalt Concrete

Viscoelastic material functions of warm-mix asphalt are not well defined yet for reasons like relatively newer technology in United States and also varies with different technologies. The rutting performances of warm-mix asphalt are also relatively new. This study evaluates the effects of different warm-mix agents on the viscoelastic material functions and rutting performance of asphalt concrete. A control hot-mix asphalt and three warm-mix asphalt mixtures were collected from manufacturing plant with identical aggregate type, size distribution, and binder grade. The loose asphalt-aggregate mixtures are compacted, cored and sawed to cylindrical specimens for dynamic modulus and rutting resistance testing. A numerical method is used to convert complex modulus function to relaxation modulus and creep compliance. In essence, the warm-mix asphalt with water-free chemical agent showed higher stiffness characteristics. However, the warm-mix asphalt with surfactant-based WMA technology is found to be superior in terms of rutting performance, whereas, the warm-mix asphalt with water-free chemical agent is found to be inferior.

Language

  • English

Media Info

  • Media Type: Web
  • Monograph Title: Geotechnical Frontiers 2017: Transportation Facilities, Structures, and Site Investigation

Subject/Index Terms

Filing Info

  • Accession Number: 01686957
  • Record Type: Publication
  • ISBN: 9780784480441
  • Files: TRIS, ASCE
  • Created Date: Oct 4 2018 3:59PM