In some tropical countries, such as Thailand and Ecuador, unpaved soil-aggregate roads are normally constructed when the average daily traffic is less than 300. These pavements are generally constructed of a single layer of subbase, which varies in depth from 5 to 14 in. Currently, various empirical models give different results for the pavement design of unsurfaced roads. This study presents a design model that has been developed to provide a rational design methodology for low-volume unsurfaced roads. This methodology is based on the theory of plasticity. It has been found to be computable with the up-to-date experience in Ecuador and Thailand, according to which 8 in of gravel and 6 in of laterite carried about 25000 and 5000 equivalent standard axles per lane in Ecuador and Thailand on silty sand and silty subgrade, respectively. (Author)

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 21-26
  • Monograph Title: General soils problems
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00348892
  • Record Type: Publication
  • ISBN: 0309032695
  • Files: TRIS, TRB
  • Created Date: Oct 30 1982 12:00AM