ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 10

Laboratory Measurements and Analysis of Clogging Mechanism of Porous Asphalt Mixes

Tan, SA
Associate professorprofessorresearch engineer, National University of Singapore,

Fwa, TF
Associate professorprofessorresearch engineer, National University of Singapore,

Guwe, VYK
Associate professorprofessorresearch engineer, National University of Singapore,

(Received 23 September 1999; accepted 25 February 2000)

Abstract

A laboratory test to assess the clogging potentials of porous asphalt mixes is useful as part of a rational design procedure of these mixes for the construction of pavement surface friction courses. Following an earlier successful attempt in inducing clogging in porous specimens in the laboratory, this paper describes a project studying the clogging potentials for porous asphalt pavements of different thicknesses under simulated field conditions. The clogging potentials were studied through the monitoring of the deterioration of the permeabilities of the laboratory specimens, made possible by a new falling-head permeameter that measures three-dimensional flow. An attempt was also made to relate the results thus obtained to a simple theoretical model suggested by Giroud for geotextiles. It was found that there was a fairly good comparison between experimental results and theory.

Keywords:
clogging potential, porous asphalt mixes, thickness, permeability, falling-head permeameter, Giroud's model

Paper ID: JTE12096J
DOI: 10.1520/JTE12096J
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