Stone-on-Stone Contact of Permeable Friction Course Mixtures Academic Article uri icon

abstract

  • Stone-on-stone contact of the coarse-aggregate fraction is one of the main characteristics of permeable friction course (PFC) asphalt mixtures that is required to provide adequate resistance to both raveling and permanent deformation. Currently, stone-on-stone contact is determined by comparing the air voids content in the coarse aggregate (VCA), assessed in both the dry-rodded condition (VCADRC) and the compacted PFC mixture (VCAmix). The underlying assumption is that the coarse aggregate of a compacted PFC mixture with VCAmixequal to VCADRCwould develop a stone-on-stone contact condition equivalent to that existing in the dry-rodded aggregate. This study focused on proposing enhancements for the quantitative determination of stone-on-stone contact of PFC mixtures. The assessment supported on both laboratory testing and application of the discrete element method and image analysis techniques, led to recommendation of a criterion to determine the breaking-sieve size. In addition, verification of stone-on-stone contact using a maximum VCA ratio of 0.9 was recommended to ensure the design and construction of PFC mixtures with fully developed stone-on-stone contact. 2010 ASCE.

published proceedings

  • JOURNAL OF MATERIALS IN CIVIL ENGINEERING

author list (cited authors)

  • Alvarez, A. E., Mahmoud, E., Martin, A. E., Masad, E., & Estakhri, C.

citation count

  • 33

complete list of authors

  • Alvarez, Allex E||Mahmoud, Enad||Martin, Amy Epps||Masad, Eyad||Estakhri, Cindy

publication date

  • November 2010