Dr Grenfell is a Senior Technology Leader at ARRB (Australian Road Research Board). Since joining the pavement team in February 2017, his work has focused on current Austroads projects looking at the improving knowledge of foamed bitumen stabilised pavements and the use of lightly cemented materials in pavement construction. He has also been looking at the addition of nanosilica to asphalt to improve properties and the addition of recycled crushed glass to asphalt to help reduce waste stockpiles. Prior to this Dr Grenfell spent 13 years as a researcher at NTEC (Nottingham Transportation Engineering Centre) at the University of Nottingham in the UK. During this time, he worked on and managed various projects related to pavement materials. These projects involved permanent deformation and fatigue properties of asphaltic materials, moisture damage in asphalt pavements, adhesion of bitumen to aggregate, warm mix asphalt technologies, the use of crumb rubber and recycled asphalt and alternative binders. His main research interests are the fundamentals of adhesion, moisture damage of asphaltic materials, recycling and the use of secondary materials.
Dr Grenfell has published more than 100 journal papers and peer reviewed conference papers. He is a Director-at-large of the International Society of Asphalt Pavements, on the Editorial board for the Proceedings of the Association of Asphalt Paving Technologists and involved in several RILEM Technical Committees looking at bituminous and asphaltic materials.
Prior to working at NTEC James undertook a PhD in Metallurgy and Materials. The title of his PhD was The Effect of Macroalloying on the Microstructure and Mechanical Properties of γ-based Titanium Aluminides. This piece of work focused on the relationships between microstructure and mechanical properties, the application being the replacement of heavier steel parts in aero-engines.