Laboratory behaviour of a double-porosity clay and claystone was investigated. This should throw light on the behaviour of large landfills of those materials produced by mining in the Northern Bohemia. Oedometer and shear box tests proved the collapsible nature of deformation and strength behaviour (the existence of three types of collapses: due to load, water and time). Three state parameters (stress, water and time) govern the behaviour especially in the low stress interval (less than 400 kPa) and when the material is dry (no water in the external pores - the effect of suction). Clay differs from claystone (sticking of grains). State boundary surface can be constructed but its validity is confined to the specific intervals of state parameters. (A) For the covering abstract see IRRD 881647.


  • English

Media Info

  • Features: References;
  • Pagination: p. 711-8

Subject/Index Terms

Filing Info

  • Accession Number: 00729132
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 90-5410-583-6
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM