MODIFIED BITUMENS

This paper reviews the need for modifying bitumens for use in difficult service conditions, comments on the different types of modifier experimented with over the past 30 years, and describes todays situation when polymer modified bitumens have emerged as potentially the most effective materials for use in such conditions. The major benefits available from polymer modification of bitumen are defined as increased adhesion, cohesion and elasticity. Methods of measuring these changes are cited and progress towards matching the improved properties to field service conditions is discussed. Particular benefits available from asphalts made with polymer modified bitumen include high stiffness and extended fatigue life in the one modified asphalt. The cost increase, modified versus unmodified bitumen, is shown to have decreased significantly over the past decade and this additional binder cost may be far outweighed by the effect of reduced layer thickness and extended life obtained in the asphalt by use of the polymer modified binder. (Author/TRRL)

• Supplemental Notes:
  • Papers presented during the Australian Asphalt Pavement Association Conference 84, 1984 Members Conference, Hobart, Tasmania, August 27-28, 1984.
• Corporate Authors:

  Australian Asphalt Pavement Asssociation

  21 Burwood Road
  Hawthorn, Victoria  Australia  3122
• Authors:
  • Bowering, R H
• Publication Date: 1984

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 19 p.

Subject/Index Terms

• TRT Terms: Adhesion; Asphalt; Benefits; Binders; Bitumen; Cohesion; Conferences; Costs; Durability; Elasticity (Mechanics); Elastomers; Fatigue (Mechanics); History; Pavements; Polymerization; Polymers; Properties of materials; Stiffness; Tests; Thickness
• Uncontrolled Terms: Fatigue life; Modifications; Modifiers; Pavement thickness
• ITRD Terms: 5942: Adhesion; 4948: Binder; 4963: Bitumen; 4994: Breaking (emulsion); 5903: Cohesion; 8525: Conference; 224: Cost; 5910: Durability; 5912: Elasticity; 7474: Elastomer; 2944: Flexible pavement; 9096: History; 3847: Maintenance; 4714: Mix design; 9048: Modification; 6285: Penetration; 5922: Plasticity; 7481: Polymerization; 5925: Properties; 4573: Recycling (mater); 7494: Rubber; 5272: Softening; 5931: Stiffness; 6722: Temperature; 6255: Test
• Subject Areas: Finance; Highways; History; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00394174
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, TRIS, ATRI
• Created Date: Jul 31 1985 12:00AM