Mechanical stabilisation: reasons for selection and methods required to obtain the desired results

Mechanical stabilisation is an important method because it is usually economical and applicable to a wide range of pavement materials. It is here considered to include both the upgrading of deficient natural materials to form stable layers as well as to the production of crushed quarry products to meet strict specification limits for fine crushed rock. Requirements for a mechanically stable material include density, internal bond, cohesion, volume stability and moisture movement. Grading and plasticity limits to achieve these requirements are given. It is normally not possible to meet strict grading requirements from crusher run quarry material so that addition of fines is needed. The grading gives a maximum density but air voids are low leading to development of high pore pressure following moisture infiltration. It is suggested that a crusher run material having higher in situ voids may be more stable. Comments on plant used and outputs typically achieved are included.


  • English

Media Info

  • Pagination: 25P
  • Monograph Title: Draft revision of guide to stabilisation in roadworks (February 1978)

Subject/Index Terms

Filing Info

  • Accession Number: 01440042
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 10:47PM