The method of incorporation of rubber is discussed, comments are made on related laboratory tests, and the design of full-scale paving experiments including experiments on rubberized materials are considered. Comments are also made on the cost of using natural rubber in pavements. Small quantities of rubber produce changes in the properties of asphalt which depend critically upon the type, amount and method of incorporation. The effect of dissolution of natural rubber on the mechanical properties is illustrated in a figure which shows the change in the impact strength of asphalt both with and without rubber and with a period of heating. Temperature of storage for rubberized asphalt, and the choice of type and amount of rubber are considered. The results of laboratory tests show that rubber imparts elastic properties to the asphalt. This reduces the temperature susceptibility and brittleness, and improves resistance to deformation. The improvements which these changes lead to are listed. It is emphasized that paving experiments must be planned and carried out, and the results analyzed with the same critical approach employed in laboratory research. The plan for a typical experiment is illustrated in a diagram. A co-operative programme of vull-scale road experiments investigated seal coats, rolled asphalts, mastic asphalts and asphalt macadam. The results of the experiments have shown significant advantages occuring from the use of rubber in all of the types of surfacings.

  • Corporate Authors:

    Malaysian Rubber Producer[s Research Association

    Malaysian Rubber Research and Development Board
    Brickendonbury, Hertford SG13 8NP,   England 
  • Authors:
    • Mullins, L
  • Publication Date: 1971

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00131704
  • Record Type: Publication
  • Report/Paper Numbers: No. 7
  • Files: TRIS
  • Created Date: May 14 1976 12:00AM