Clogging Evaluation of Permeable Bases
Publication: Journal of Transportation Engineering
Volume 129, Issue 3
Abstract
The clogging of the void spaces within the permeable base by foreign particles can severely reduce its drainage capacity. This will, in turn, reduce the service life of the permeable base layer within the pavement. In this paper, the reduction in the vertical permeability of several permeable base mixes as a result of clogging has been studied. The clogging materials used are mixtures of sand and residual soil. An empirical theoretical formulation has been derived from the Kozeny-Carmen equation in order to predict the reduction in permeability of the permeable bases. The equation has been expressed in terms of the initial vertical permeability of the permeable base specimen, porosity, amount of clogging material retained, and an experimental empirical coefficient. This coefficient is found to be dependent on the ratio of the size of the permeable base to the size of the clogging material and coefficient of uniformity, of the clogging material. The theoretical predictions have been compared with experimental results, with good agreement.
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Copyright © 2003 American Society of Civil Engineers.
History
Received: Oct 26, 2001
Accepted: Apr 9, 2002
Published online: Apr 15, 2003
Published in print: May 2003
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