AN INVESTIGATION INTO THE USE OF FELSITE AS AN ASPHALT CONCRETE AGGREGATE

The paper describes the steps taken in improving asphalt manufactured from an aggregate found in the Witbank area of the Transvaal. Initial asphalt production failed to meet specification. Laboratory testing showed that this was largely due to the poor affinity of the stone for bitumen. The effect of the addition of various fillers, an adhesion agent and imported fine aggregate are discussed. Hydrated lime, as a filler, was found to improve the properties of the mix remarkably. Modifications to the particle shape and grading of the aggregate were found to improve the stability of the asphalt further. A final mix which achieved a balance between economy and desired durability is described. /TRRL/

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 9 p.
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00081746
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Apr 22 1975 12:00AM