THE DEVELOPMENT OF PVC/TAR AS A ROAD BINDER

An account is given of the development of PVC/TAR for use in road maintenance in Southern Africa. The nature of polyvinyl chloride and its effects on the properties of coke-oven tar are described. Procedures for preparing PVC/TAR blends and some practical aspects of the construction of surface treatments with this binder are mentioned. Promising results have been given by low-volatile PVC/TAR blends. The oldest, most successful sections were laid in October 1968 and are expected to give useful service. The oldest surviving full-scale work was laid in February 1969. Although the prime objective of adding PVC is to improve the durability of coke-oven tar, it is clear that PVC/TAR has a number of additional advantages such as reduction in initial whip-off with a consequent reduction in windscreen damage due to flying stones. Certain minor precautions are necessary in storage and handling. And it is shown that low-volatile blends are more resistant to thermal degradation of the PVC. There is a need to develop a PVC/TAR blend which can be applied successfully under winter conditions on the Highveld and to determine optimum construction techniques in using this binder. In many parts of Southern Africa PVC/TAR should be substantially cheaper than bitumen and only slightly more expensive than unmodified tar. /Author/TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00097845
• Corporate Authors:

  South African Institute of Civil Engineers

  P.O. Box 1187, 75 Marshall Street
  Johannesburg,   South Africa 
• Authors:
  • Jamieson, I L
• Publication Date: 1973-10

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 265-271
• Serial:
  • CIVIL ENGINEER IN SOUTH AFRICA
  • Volume: 15
  • Issue Number: 10
  • Publisher: South African Institution of Civil Engineers
  • ISSN: 0009-7845

Subject/Index Terms

• TRT Terms: Binders; Handling and storage; Handling characteristics; Highway maintenance; Polyvinyl chloride; Storage facilities; Surface treating; Tar
• Uncontrolled Terms: Handling
• ITRD Terms: 4948: Binder; 3847: Maintenance; 7420: Polyvinylchloride; 2991: Resurfacing; 8103: South Africa; 2984: Surface dressing; 4984: Tar
• Subject Areas: Freight Transportation; Highways; Maintenance and Preservation; Materials; Terminals and Facilities;

Filing Info

• Accession Number: 00082749
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jul 24 1975 12:00AM