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Gordon Airey
University of Nottingham, UK


Key to the performance of asphalt mixtures is the adhesion at the mineral aggregate-binder interface which is extremely difficult to determine experimentally. Without the ability to directly and accurately quantify adhesion between mineral surfaces and bitumen, it is impossible to engineer the material to resist the various forms of distress such as cracking, fretting, stripping and disintegration. In this presentation, research efforts undertaken over the last 15 to 20 years in terms of adhesion and cohesion testing, modelling and predicting are discussed with direct relevance to the fundamental as well as practical assessment of aggregate-bitumen adhesion.

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