An X-Ray CT Validated Laboratory Measurement Method for Air Voids Distribution Over Depth in Asphalt Pavement: A Step Toward Simplified Oxidation Modeling uri icon

abstract

  • 2014 Taylor & Francis Group, LLC. Recent efforts relating pavement failure to binder hardening have resulted in a pavement oxidation model. A key parameter, the diffusion depth, the ratio of binder volume to accessible air void surface area, is determined via X-ray computed tomography (CT). Toward an alternative determination, in this work volumetric techniques were employed to measure total air voids of core slices over the pavement depth. Because the 0.4-inch-thick slices are insufficient to meet standard method specimen size requirements, precision was evaluated and alternative maximum theoretical specific gravity methods were compared. A vacuum dryer increases efficiency without oxidizing the binder. Air void distributions compare favorably with X-ray CT measurements.

published proceedings

  • PETROLEUM SCIENCE AND TECHNOLOGY

author list (cited authors)

  • Rose, A. A., Arambula, E., Howell, T., & Glover, C. J.

citation count

  • 5

complete list of authors

  • Rose, AA||Arambula, E||Howell, T||Glover, CJ

publication date

  • December 2014