Internal structure of compacted permeable friction course mixtures

摘要: Abstract Durability and functionality (i.e., noise reduction effectiveness drainability) of permeable friction course (PFC) mixtures depend on the characteristics air voids (AV) contained in mixture. This study analyzes internal structure PFC mixtures, assessed terms AV characteristics; determined using X-ray Computed Tomography image analysis techniques. Corresponding results showed: (i) heterogeneous distributions horizontal direction both field-compacted (road cores) specimens compacted Superpave Gyratory Compactor (SGC) (ii) limitations to compare their vertical distributions. Recommendations reduce heterogeneity included road cores with a minimum 152.4 mm diameter coring SGC 101.6 mm diameter. Implementation field-compaction control future prepared accordingly was recommended determine pattern distribution that should be reproduced corresponding modifications required for fabrication these specimens.