DIFFUSION AND DIFFUSE CEMENTATION IN LIME AND CEMENT STABILISED CLAYEY SOILS - CHEMICAL ASPECTS

Quantitative measurements were made of the diffusion of lime into unpulverised clay lumps in lime and cement stabilised mixtures of a heavy montmorillonitic clay soil. Lime/clay reaction products, both within lumps and within the initially stabiliser-rich matrices, were analysed. Interpreted in the light of earlier findings the chemical analyses reveal the striking efficiency with which even 0.5 per cent lime could alter the physical properties of this soil. The analyses show that montmorillonite was the exclusive reactant with lime, and further, that montmorrillonite reacted almost exclusively at crystal edges. The analyses show why diffuse cementation so effectively utilises such small quantities of lime: not only are products strategically placed, but their extensive development at any location is unlikely while nearly clay remains unreacted. A phenomenon similar to the adsorption of lime postulated by diamond and kinter was demonstrated; but it was concluded to be associated with only extremely ready availability of lime, and therefore to be of rather lesser significance than anticipated by diamond and kinter. However, it possibly could be prejudicial to the most uniform development of diffuse cementation: to guard against its occurrence, coarsely pulverised mixtures might be best stabilised with coarsely ground lime. /Author/ /TRRL/

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 6-47
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00137715
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS, ATRI
  • Created Date: Apr 13 1977 12:00AM