PREDICTION OF SUBGRADE MOISTURE CONDITIONS

It is important in a variety of geotechnical and pavement engineering problems to know what the eventual moisture conditions under a covered area are going to be. Potential benefits include thinner pavements, confidence in using sub-standard materials and the more accurate prediction of heave and settlement, all of which may result in considerable savings. In 1973 an extensive road survey was carried out in the Transvaal that resulted in a mass of information that was subsequently analysed statistically to arrive at conclusions as to the most important factors affecting the moisture regime and to produce empirical prediction techniques applicable to southern African conditions. The analysis included linear and non-linear regressions and the development of models containing only selected parameters. The prediction accuracy of each model is given together with an indication of the climatic areas in which these models are applicable. The terms "characteristics maximum and minimum moisture content" are defined as those moisture contents which have only a specified chance of being exceeded or ever reached respectively. It is proposed that these moisture contents are used in design. (Author)

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 149-156

Subject/Index Terms

Filing Info

  • Accession Number: 00396700
  • Record Type: Publication
  • Report/Paper Numbers: RR 336
  • Files: TRIS
  • Created Date: Aug 25 2004 2:37AM