RECENT DEVELOPMENTS IN SOIL STABILIZATION

As the use of marginal-quality materials in pavement foundations and for structural layers in roads increases with the necessity to use more locally available materials in the most cost-effective manner, there is a greater requirement for improvement of these materials by stabilization. Besides the traditional pozzolanic stabilizers such as lime and cement, there is a rapidly developing market for proprietary soil additives that make use of various chemical reactions during the soil stabilization process. Although there is a marked increase in the use of bitumen emulsions for stabilization, this paper concentrates on the use of chemical soil stabilization. Recent findings with respect to the long-term durability of pozzolanic stabilizers, primarily in relation to the phenomenon of carbonation of the stabilizer and its reaction products are discussed. Numerous premature failures of roads and significant problems during construction have been attributed to carbonation. The application and use of certain non-pozzolanic chemical soil stabilizers (mostly strongly acidic, ionic, sulphonated, oil-based products) following a number of years of research and utilization is discussed. It is concluded that when utilized correctly with appropriate soil materials, these products can be very cost-effective. (a) For the covering entry of this conference, please see IRRD abstract no. 492019.

Language

  • English

Media Info

  • Features: References;
  • Pagination: 121-35 (SESSION B2)

Subject/Index Terms

Filing Info

  • Accession Number: 00770008
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0-86910-783-6
  • Files: ITRD, ATRI
  • Created Date: Oct 7 1999 12:00AM