Integrated approach for analyzing Effects of Surface Permeability on Lomg Term Performance of Asphalt Pavements

交通基础设施，特别是高速公路，在加拿大和世界其他国家的国民经济中发挥着重要作用。因此，它们需要大量的投资来建造新建道路和人行道以及维护现有的网络。然而，从历史上看，沥青路面在建造能够满足其预期设计寿命的道路方面一直面临着重大问题。在包括加拿大人在内的世界上许多地方，许多新建的沥青道路的早期失效迫使政府和道路管理者搜索和调查其他类型的道路，例如波特兰水泥混凝土和/或使用各种添加剂和加强格栅，以延迟所观察到的沥青道路的早期劣化。本研究调查建立在申请人进行的早期研究工作的结果和发现的基础上，申请人应用理论和基础研究的结果来开发创新和适用的技术，以实现设计和建造沥青路面道路的目标，从而满足其预期的长期设计目标。建议的研究的主要推力是综合施工裂缝，渗透性和沥青路面层之间的粘结的影响，模拟热横向裂缝的传播。所开发的模型将通过实验室和现场实验进行验证。研究结果将用于升级AASHTO热裂缝预测模型。

Transportation infrastructures in general and highways in particular plays significant role in the national economy of Canada as well as other countries of the world. Therefore, they require large amounts of investments for building new roads and pavements and maintaining existing networks. However, historically, asphalt pavements have been facing significant problems in terms of building roads that can meet their projected design lives. The early failure of many newly constructed asphalt roads in many parts of the world including Canadians are forcing the governments and road administrators to search and investigate other types of roads such as Portland cement concrete and/or the use of various additives and reinforcing grids to delay the observed early deterioration of asphalt roads. This research investigation builds on the results and findings of early research work carried out by the applicant which applies findings of theoretical and basic research to develop innovative and applicable technologies to achieve the goal of designing and building asphalt pavement roads that will meet their expected long term design objectives. The main thrust of the proposed research is to integrate the effects of construction cracks, permeability, and bond between asphalt pavement layers to model the propagation of thermal transverse cracks. The developed model will be validated using lab and field experiments. The outcome will be used to upgrade the AASHTO Thermal crack predictive model.