POLYOLEFIN - MODIFIED BITUMEN BINDERS: THE NOVOPHALT PROCESS

This paper discusses some properties, tests, and applications of the Novophalt Process for producing bitumen binders modified with polyolefins, especially polyethylene. Asphalt mixes, which incorporate Novophalt modified binder, can be made in standard asphalt mixing plants, and laid with conventional paving equipment. Many tests and extensive field experience confirms that polyethylene modified binders (PEMB) improve the elastic properties of the mixed materials in which they are used, and that the proportional improvement increases with temperature. The paper briefly describes tests at: (1) Autostrade Spa in 1982; (2) the Texas Transportation Institute in 1989; (3) on Route 75 in Texas in 1986; and (4) at the then Transport and Road Research Laboratory (TRRL) between 1982 and 1984. Advantages of PEMB, which have been confirmed by these tests, include: (1) mix stability at higher temperatures as well as lower temperatures, which increase pavement service life by a factor of 2.7-2.9; (2) reduced deformation through rutting; (3) ability to bear higher axle loads; (4) improved binder-aggregate adhesion; and (5) reduced solubility in mineral oils. The greatest single use of PEMB has been in Italy. PEMB is also used in several other European countries, the UK, the USA, and Saudi Arabia.

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  • Corporate Authors:

    INSTITUTION OF HIGHWAYS & TRANSPORTATION

    6 ENDSLEIGH STREET
    LONDON,   United Kingdom  WC1H 0DZ
  • Authors:
    • BODY, D
  • Publication Date: 1995-12

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 22,25-6,29
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00720801
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, ATRI
  • Created Date: May 24 1996 12:00AM