If the answer is “yes” then we should ask ourselves to what extend the results have been implemented in practice and to what extend this has resulted in improved pavement performance. The question we are facing now is “what have we learned from all our efforts” did we manage to fully understand the cracking phenomenon as caused by the combined influences of traffic, environment and ageing? If this is not the case we have to define the problems that still need to be solved and what kind of research is needed to arrive to these solutions. Since then a huge amount of research was done on the prediction of defect types like permanent deformation, raveling, cracking etc. Pavement research got a major boost by the execution of the AASHO Road Test in the late 1950’s early 1960’s. K eynote n☁: Cracking : the past, the present and the future, a never-ending story In 2003 he was awarded the Emmons award for the best paper at the AAPT 2002 meeting. He was the chairman of the former RILEM committee on cracking in asphalt pavements. Next to that he acted and still acts as senior advisor to some major design and construction projects in and outside Europe. His research covered a wide range of topics such as cracking of asphalt pavements, behavior of unbound materials, pavement evaluation and accelerated pavement testing. MOLENAAR is Emeritus Professor of the Delft University in the Netherlands.
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