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Porous Friction Course: A Laboratory Evaluation of Hydraulic PropertiesRémi M. Candaele, M.S.E., Michael E. Barrett, Ph.D., Randall J. Charbeneau, Ph.D. ABSTRACT Porous Friction Course (PFC) or porous asphalt is a permeable asphalt layer placed over an impervious pavement. Air void spaces inside the pavement allow rainfall to flow to the base of the porous asphalt and runoff appears at the edges of the pavement. Numbers of benefits of PFC are acknowledged such as reduced hydroplaning and better visibility. This study focuses on the hydraulic properties of porous asphalt overlays installed by TxDOT at three locations around Austin: Loop 360, RM 1431 and RM 620. Air void content and hydraulic conductivity have been measured through different laboratory methods on extracted cores. Results have revealed a substantial clogging phenomenon of the PFC samples. The highlighted links that follow are connected to Adobe pdf files of the corresponding material. To view them you must have the Adobe Acrobat Reader 3.0. View the Report...(5.63 MB)
These materials may be used for study, research, and education, but please credit the authors and the Center for Research in Water Resources, The University of Texas at Austin. All commercial rights reserved. Copyright 2002 Center for Research in Water Resources. |
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