GB5® HiMA for long-life and cost-effective pavements as an eco-friendly alternative to EME2

Aggregate packing concepts developed in the field of high-performance cement concretes, initially by Caquot (1937) then by contemporary researchers since the 1970's, were transposed to the field of asphalt concretes. These concepts, associated with the use of Polymer-modified Bitumen (PMB), enabled the development of a new generation of dense high-modulus asphalt concretes. The single or double gap-graded grading curves of these mixes, lead to a great interlock between coarse aggregates. Consequently there is no need for low penetration grade bitumen to fulfill the European EME2 specification requirements, in particular the 14,000 MPa stiffness modulus value at 15°C. Besides, the use of PMB, at a content of about 4.5%, combined with such an optimized aggregate packing leads to the design of the so-called High-Modulus Asphalt concretes (HiMA) characterized by great compactability, very high stiffness modulus and high fatigue resistance in a single formulation, which allow reduced pavement thickness and increased longevity. Moreover, the proposed mix design and the 4.5% binder content makes PMB's use affordable in base courses. Aggregates packing principles and mechanical performances measured in the lab are presented in the paper. Correlation between internal skeleton and mechanical performances are briefly treated. The paper also addresses the successful application of this new material on different job sites, located mainly in France and in South-Africa. The proposed GB5® HiMA may be considered as a relevant solution for sustainable long-life and cost-effective pavements as an eco-friendly alternative to EME2.

• Record URL:
  http://arrbknowledge.com
• Authors:
  • Olard, F
  • Pouget, S
• Conference:
  • AAPA International Flexible Pavements Conference, 17th, 2017, Melbourne, Victoria, Australia
• Publication Date: 2017-8

Language

• English

Media Info

• Pagination: 9p
• Monograph Title: Roads of the future: embracing disruption: 17th AAPA International Flexible Pavements Conference, Melbourne, 13-16 August 2017

Subject/Index Terms

• TRT Terms: Binders; Bituminous binders; Bituminous materials; Bituminous pavements; Environment; Environmental impacts; Mix design; Modulus of deformation; Pavements; Polymers; Specifications; Tests for suitability, service and quality
• Uncontrolled Terms: Pavement technology
• Geographic Terms: France; South Africa
• ATRI Terms: Bituminous pavement; Environment; Environmental effects; Mix design; Modulus; Pavement evaluation; Polymer modified binder; Specifications
• ITRD Terms: 9020: Evaluation (assessment)
• Subject Areas: Highways; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01648331
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Oct 10 2017 2:56PM