INNOVATIONS IN DESIGN AND CONSTRUCTION OF A LOW VOLUME LOW COST ROAD ON WINDBLOWN SANDS

The design of a low cost pavement structure for low volume roads in some arid parts of Southern Africa is described. Only two available sources of material exist, namely calcrete and windblown sand, both of which vary greatly in quality. Several methods of possible improvement in strength are described and results are based both on laboratory as well as field measurements. Two pavement system are considered in design namely a thin surfacing on a stabilized base and an asphaltic concrete made of calcrete/sand on in situ compacted sand. Both systems are susceptible to variance in material quality and this is considered in a method of pavement design. The statistical method of design in which variance in material properties is taken into account, considers a simplified two layer system which allows failure of the pavement area to be predicted. It is concluded that the improvement of the quality of available materials through selection and stabilization is necessary but the extent thereof depends on the variance and the mean strength of the product. /Authors/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 208-214
  • Monograph Title: Low volume roads: second international conference; proceedings, August 20-23, 1979
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00301119
  • Record Type: Publication
  • ISBN: 309028434
  • Files: TRIS, TRB
  • Created Date: Oct 17 1979 12:00AM