Experimental Study on Pore Clogging of a Porous Pavement under Surface Runoff

Pervious concrete pavements have good drainage and noise reduction capabilities, and also have the ecological function of regulating surface temperature and humidity; they have been widely used in many countries. However, drainage capacity will be greatly decreased once the pores become clogged in permeable pavements. This study tries to reveal the mechanism of sediment clogging in the pores of the pervious pavement under surface runoff and provide bases for optimizing pervious pavement design. A series of laboratory tests have been conducted to demonstrate the effects of pavement slope, sediment size, inflow rate, and seepage outflow rate on the clogging phenomenon and sediment transport capacity of the porous pavement. Tests indicate that the mass of sediment clogged in the porous pavement generally decreases with increasing pavement slope, inflow rate, and sediment diameter, but the clogging risk increases with increasing seepage outflow rate. Greater sediment transport rate over the porous pavement is observed if the pavement slope, inflow rate, sediment diameter and seepage outflow rate is larger. The experimental results of dimensionless sediment transport rate have been compared with Meyer-Peter and Einstein empirical correlations. Most of the experimental points are concentrated near the empirical curves, whereas others scatter rather widely. This is mainly because the flow conditions are different, their empirical equations were based on experiments that have been done over a bed composed mainly of unconsolidated sand with large flow depth, whereas the present study uses fixed porous pavement and small flow depth, as the authors' main interest is to study surface runoff in the urban area.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 138-146
  • Monograph Title: Design, Analysis, and Asphalt Material Characterization for Road and Airfield Pavements

Subject/Index Terms

Filing Info

  • Accession Number: 01535064
  • Record Type: Publication
  • ISBN: 9780784478462
  • Files: TRIS, ASCE
  • Created Date: Jul 21 2014 3:02PM