Pavement

This study investigated the potential introduction of the French high modulus hot mix asphalt technology, called enrobés à module élevé (EME) to Australia. The EME mix technology provides a high performing asphalt material for use in heavy duty pavements, where the pavement carries large volumes of heavy vehicles, there are potential height constraints, or the traffic loading is considered extreme, such as slow lanes, climbing lanes, bus lanes and airport pavements.

Based on an international literature review, the historical development and performance of EME was investigated. In co-operation with the asphalt industry, the availability of the required materials such as suitable aggregates and hard penetration grade bitumen was also investigated. By using locally available constituent materials, a laboratory-based demonstration project was undertaken to provide insight and guidance for EME mix design. The mix design of EME differs from mix design approaches typically used in Australia in that it is strictly based on performance-related testing. The trial and error approach of the laboratory testing reported in the study also provides a good understanding for practitioners about the complex nature and requirements of an EME mix design.