Innovation in the treatment of clayey materials

The growing interest in cement and/or lime stabilization is due to the possibility of re-use of poor-quality excavated materials in road construction, with clear environmental benefits. In some situations, the lime-cement treatment appears to be more suitable. In this case the lime stabilization is the first part of a two-section process using ordinary Portland cement, ground blast furnace cement, pulverised fuel ash, or some other hydraulic binding agent. However, in order to guarantee the required improvement of the mechanical properties during the time, it is important to accurately study the lime/cement addition by considering many factors such as soil gradation, type and amount of clay mineral content, organic matter, type and amount of lime/cement added, curing period and temperature. Rapid curing of the cement, actual clay minerals present in the raw material (creating the need to perform X-Ray Diffractions -XRDs), activity of minerals (reactivity tests), insufficient density, sulphate attack and ettringite formation, are recurring issues. In light of the above-mentioned facts, the objectives and scope of this paper are focused into the study of lime/cement treatments. Benefits and drawbacks associated with a case study are described and discussed.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 11p
  • Monograph Title: 24th World Road Congress Proceedings: Roads for a Better Life: Mobility, Sustainability and Development

Subject/Index Terms

Filing Info

  • Accession Number: 01523535
  • Record Type: Publication
  • ISBN: 2840602679
  • Files: TRIS
  • Created Date: Apr 14 2014 8:11PM