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Open-graded aggregate is a material that contains significant distribution with few fine particles and high void content. Therefore, it provides high permeability and bearing load from grain-to-grain contact. As a result, in pavement system, this material is usually used for base and subbase courses which are support the pavement in load-bearing capacity and drainage for serving the life of road. When design pavement system with open-graded aggregate, the importance for engineers is designing base/subbase courses which not only meet the requirement of strength, displacement and drainage but also economy. During decades, there is a few researches about the necessary characteristics of this kind of aggregate. The overall objective of this study is summarize some researches in resilient modulus and permanent deformation of open-graded aggregate for understanding well the factors that need to be considered during design pavement.
