SOME NOVEL ROAD RELATED APPLICATIONS OF POLYMER MODIFIED BITUMEN AND TAR --PROCEEDINGS OF THE FOURTH CONFERENCE ON ASPHALT PAVEMENTS FOR SOUTHERN AFRICA, HELD CAPE SUN HOTEL, CAPE TOWN, REPUBLIC OF SOUTH AFRICA, 12-16 MARCH 1984. VOL 1 & VOL 2.

It can be safely stated that, regardless of the nature of the project, engineers usually find it difficult to select raw materials which perfectly meet all design criteria. Roads are no exception to this rule. Both bitumen and tar are thermoplastic and thus exhibit changes in physical properties with variations in ambient temperature. Whilst tar is resistant to attack by aliphatic solvents, bitumen surfaces are dissolved on contact with diesel fuel and motor oil. Logically, tar oversprays may be used to protect bitumen surfaces from oil attack; however, the temperature susceptability of unmodified tar restricts greatly the scope of this application. The modification of tar with polyvinyl chloride to reduce temperature susceptability is well-known and well documented. This paper deals with road products based on tar and bitumen modified with other polymers such as acrylic, sbs and epoxy resin. Besides controlling temperature susceptability such polymer modification is shown to enhance solvent and oil resistance, tensile and bond strengths, abrasion resistance and, in some cases, durability. The rapid development of these high performance properties has enabled polymer modified tar and bitumen to be used in many 'difficult' areas. Examples of practical applications illustrate the economic advantages to be gained from the longevity provided by polymer modified systems.(a) for the covering abstract of the conference see IRRD 815702.

• Corporate Authors:

  EXECUTIVE COMMITTEE CAPSA '84

  PO BOX 6946
  Roggegaai,   South Africa 
• Authors:
  • Field, L E
• Publication Date: 1984

Language

• Afrikaans

Media Info

• Pagination: p. 501-7
• Serial:
  • Publication of: EXECUTIVE COMMITTEE CAPSA '84
  • Publisher: EXECUTIVE COMMITTEE CAPSA '84

Subject/Index Terms

• TRT Terms: Acrylic resins; Adhesion; Bitumen; Conferences; Durability; Epoxy resins; Mix design; Polymers; Polyvinyl chloride; Road construction; Strength of materials; Tar; Temperature; Wear
• Uncontrolled Terms: Modifications
• Subject Areas: Construction; Data and Information Technology;

Filing Info

• Accession Number: 00483050
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 31 1989 12:00AM