Choice of materials and construction are reviewed with reference to aggregates, binders and alternatives to bitumen in flexible pavements. Although aggregates do not seriously affect the choice of construction method, pertinent questions are raised regarding the use of local aggregates, the use of reactive aggregates, the utilization of waste materials, and economy in the use of binders. Magnesium oxycholride may be considered as a possible lower course binder. The use of Pozzolanic materials such as furnace slag (chemical reactivity may be increased by ultrafine grinding) needs to be researched. A natural polymer which may be considered as an alternative in flexible pavements is clay binder used in soil-gravel combinations. Lignin and natural rubber, however, could be costly. Rubber from reprocessed tires may be used as an improver of other binders. Polyvinlychloride, the cheapest of synthetics, costs about $200 per ton and does not have the desired properties. Synthetic petroleum processes are briefly reviewed. Chemical products made directly from brown coal are theoretically possible. Such products may be used (possibly) to form three dimensional chemical links in the road itself (analogous to concrete setting). Product costs for various synthetic liquid hydrocarbon products are discussed.

  • Supplemental Notes:
    • Conference on the Efficient Use of Bitumens, Asphalts and Tars as Paving and Construction Materials, Sydney, Australia, 2-3 December 1974; Session 7.
  • Corporate Authors:

    University of New South Wales

    School of Civil Engineering, Anzac Parade
    Kensington, New South Wales  Australia  2033
  • Authors:
    • Siemon, S R
  • Publication Date: 1974-12

Media Info

  • Pagination: 4 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00095563
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 29 1975 12:00AM