THE STRENGTH OF CLAY FILL SUBGRADES: ITS PREDICTION IN RELATION TO ROAD PERFORMANCE

The suction method for estimating the shear strength of soils from plasticity data and moisture content has been examined in the light of a wide range of experimental evidence; it is concluded that the method predicts changes in strength of a wide range of soils satisfactorily. The method has been used to quantify the likely changes in moisture content and strength under a range of site conditions. Very wet weather during construction on a poorly drained site reduces markedly the ultimate equilibrium strength of subgrades of low plasticity; equilibrium values are less than half the values associated with construction in dry weather. Heavy clays are much less affected. Deflection studies indicate that the life of a pavement built in very wet weather may be reduced by up to 50 per cent of the life expected of a pavement constructed during average weather conditions. (a) (TRRL)

  • Corporate Authors:

    Transport and Road Research Laboratory

    Old Wokingham Road
    Crowthorne RG11 6AU, Berkshire,   England 
  • Authors:
    • Black, WPM
    • Lister, N W
  • Publication Date: 1979

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 30 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00307840
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: LR889 Monograph
  • Files: ITRD, TRIS, ATRI
  • Created Date: Jun 26 1980 12:00AM