Sidewall Leakage in Hydraulic Conductivity Testing of Asphalt Concrete Specimens
Bowders JJ, Neupane D, Loehr JE
(Received 2 March 2001; accepted 17 September 2001)

Abstract
Asphalt specimens with irregular sidewalls can require special testing considerations when measuring hydraulic conductivity in a flexible wall permeameter. The hydraulic conductivity of laboratory prepared, dense asphalt concrete with high asphalt cement content (6—8.5% asphalt cement) was measured in the laboratory. Hydraulic conductivities were found to be excessive and were shown to be caused by sidewall leakage. Applying a thin layer of silicone vacuum grease to the sides of the asphalt specimens arrested the sidewall leakage, thereby permitting more accurate measurement of the hydraulic conductivity of the asphalt concrete.

Keywords:
asphalt, asphalt concrete, hydraulic barriers, hydraulic conductivity, permeability, sidewall leakage, soil testing, waste containment

Paper ID: GTJ2520210

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Author Bowders JJ, Neupane D, Loehr JE Title Sidewall Leakage in Hydraulic Conductivity Testing of Asphalt Concrete Specimens Symposium , Committee on