Binder and mix evaluation of highly modified asphaltic binder

The technology transfer of EME2, a high modulus asphalt, has been successfully implemented in Australia bringing value by reducing pavement thickness and improving rutting resistance, especially in hot climate conditions. By using a hard binder and balancing its brittleness with a rich mortar in the asphalt mix, it attempts to bring both high stiffness value and fatigue resistance. As a consequence, the mix design has to be adjusted compared to conventional asphalt concrete including higher binder content. This technology was developed in France in the 80’s. More recently, the development of Highly Modified Asphaltic binder (HiMA) has found some new application in base and binder layer enabling to achieve similar asphalt mix characteristics to EME (Enrobés à Module Elevé) but with lower binder content. This paper presents some comparative results on binder and on asphalt mixture between a high modulus mix using hard binder and a mix with highly modified bitumen made up with 7.5 % of especially designed SBS polymer. An extensive evaluation was made on low, intermediate and high temperature characteristics of the two materials. The binder was evaluated towards empirical properties and, as well, fundamental rheological properties, including on lab aged conditioning. The asphalt mixes were characterised with compactability using gyratory compactor, rutting resistance, complex modulus in various conditions of temperatures and frequencies, fatigue resistance and low temperature cracking susceptibility. The overall outcomes show that EME2 type characteristics can be achieved with lower binder content when using highly modified asphalt binder. In addition, the HiMA binder brings additional values on the cracking resistance of the mix. This enhances the benefit for Polymer modified Bitumen, PmB, to be used in structural layers especially for cost effective maintenance and rehabilitation.

• Record URL:
  http://arrbknowledge.com
• Authors:
  • Porot, L
  • Jellema, E
  • BELL, D
  • Gronniger, J
• Conference:
  • AAPA International Flexible Pavements Conference, 18th, 2019, Sydney, New South Wales, Australia
• Publication Date: 2019-8

Language

• English

Media Info

• Pagination: 11p
• Monograph Title: Our everlasting roads – enabling future mobility: 18th AAPA International Flexible Pavements Conference and Exhibition, 18-21 August 2019, Sydney

Subject/Index Terms

• TRT Terms: Bitumen; Bituminous binders; Bituminous pavements; Mix design; Pavements; Performance
• Uncontrolled Terms: Materials technology (asphalt/bitumen/concrete); Pavement technology
• ATRI Terms: Asphalt; Bitumen; Mix design; Pavement; Performance; Polymer modified binder
• Subject Areas: Pavements;

Filing Info

• Accession Number: 01718288
• Record Type: Publication
• Source Agency: ARRB Group Limited
• Files: ITRD, ATRI
• Created Date: Sep 26 2019 12:33PM