5 1 10 Evaluation Of Variability In Resilient Modulus Test Result (ASTM D 4123) Brown, E.Ray Primary Author mixed material National Center for Asphalt Technology 1989 Density of Asphalt Concrete - How Much is Need Brown, E.Ray Primary Author mixed material Washington, DC National Center for Asphalt Technology 1990 Heavy-Duty Asphalt Pavements in Pennsylvania : Evaluation for Rutting Brown, E. Ray Primary Author mixed material TRB 1993 NCHRP Report 531. Relationship of air voids, lift thickness, and permeability in hot mix asphalt pavements Brown, E. Ray Primary Author mixed material 0309088070 TRB 2004 Hot Mix Asphalt Materials, Mixture Design and Construction Brown, E. Ray Primary Author mixed material 0914313021 NCAT 2009