ESTIMATING PERMEABILITY OF ASPHALT-TREATED BASES

This report describes laboratory testing and statistical analysis of the resulting data to determine the effects of aggregate gradation and percent asphalt stabilization on the permeability of asphalt-treated roadway base layers. Three different types of aggregates were tested in the study. They are crushed limestone, crushed granite, and uncrushed river gravel. A top size of 38 mm (1.5 in.) was used for all gradations. Asphalt cement (AC-20 grade) at 2% and 3% was used to stabilize the aggregates. A total of 60 permeability tests were performed using a 15.2 cm (6-in.) diameter permeameter. A statistical method was used to arrive at a first-order multiple regression equation to predict the coefficient of permeability of asphalt-treated bases in the range of 0.2-0.7 cm/sec (500-2,000 ft/day) using the percentage of air voids in the sample, the percentage of asphalt cement used, and the percent by weight of materials that pass the 2.36-mm (No. 8) sieve.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 103-111
  • Monograph Title: Modeling and model verification; testing pavement layers and materials; and low-cost drainage structures
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00715547
  • Record Type: Publication
  • ISBN: 0309061725
  • Files: TRIS, TRB
  • Created Date: Jan 2 1996 12:00AM