In lime column stabilisation of soft normally consolidated or slightly overconsolidated clays of 40-70% natural water content, unslaked lime amounting to 6-10% of dry soil weight is mixed in situ into the clay in the shape of a column. Columns can be up to 10 M long and 500 mm in dia. Hydration and ion exchange increase shear strength within a few hours, while pozzolinic reactions occur over a number of years, gradually increasing the shear strength. As water etc content greatly influences results, design must be based on tests on the soil concerned. There is no increase in shear strength in organic soils. Homogeneous mixing is essential. In one series of in situ tests on clay of 10-20 kpa shear strength, the final strength was about 200 kpa. Deformation properties are also improved. In compression tests on quick clay in which strain for vertical stress of 160 kpa had been 20%, figures at 21, 106, 272 and 473 days after admixture were 3.5, 1.8, 1.4 and 1.0% respectively. For the same clay with original compression modulus of 300 kpa, final moduli at the same ages were 4400, 8000, 8800 and 10800 kpa respectively. (TRRL)

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  • Corporate Authors:

    Svenska Vag-Och Vattenbyggaren Riksforband

    Regeringsgaten 98
    S-11139 Stockholm,   Sweden 
  • Authors:
    • Holm, G
  • Publication Date: 1979

Media Info

  • Features: Figures; References;
  • Pagination: p. 45-48
  • Serial:
    • Vag-Och Vattenbyggaren
    • Volume: 25
    • Issue Number: 7/8
    • Publisher: Svenska Vag-Och Vattenbyggaren Riksforband
    • ISSN: 0042-2177

Subject/Index Terms

Filing Info

  • Accession Number: 00311879
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Files: ITRD, TRIS
  • Created Date: Nov 19 1980 12:00AM