STABILIZATION OF SANDS BY ASPHALT EMULSION

This laboratory study investigates whether sands and sand- clay aggregates are amenable to stabilization by asphalt emulsion. Marshall tests were used to evaluate the stability of emulsion-treated sand. Microscopic examination of the treated aggretgates revealed the nature and extent of bitumen coating and spreading characteristics of bitumen binder. The results show that well-graded sands with sufficient silt-clay material respond well to emulsions. Portland cement in trace quantities is required, however, to improve the water susceptibility of the mixtures. Because of its superior bonding to siliceous aggregate and its rapid setting tendencies, cationic emulsion is preferred in sand stabilization. Recommendations concerning mixing and compaction moisture are presented. This paper shows that either too little or too much mixing time will result in less than optimum coating. A hypothesis concerning the mechanism of emulsion bonding to aggregates--dry as well as prewet--is proposed.

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 51-56
  • Monograph Title: Use of waste materials and soil stabilization
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00148368
  • Record Type: Publication
  • ISBN: 0309025621
  • Files: TRIS, TRB
  • Created Date: Mar 15 1977 12:00AM