由於瀝青混凝土具有可回收再利用之特性，且多數研究結果指出使用瀝青回收料能提升再生瀝青混凝土之性能，亦可滿足經濟與環保性概念之需求。本研究採用兩種RAP添加方式，並以25%、40%及70%重量百分比下的添加量進行研究，探討再生瀝青混凝土的工程性質與瀝青流變性對永久變形行為之影響，並提出改善建議。本研究參照英國TRL之再生瀝青混凝土配比設計指南，針對老化瀝青之有效反應量，提出一個新的方法找出各試體之有效反應量進行再生瀝青混凝土配比設計。利用溫度與頻率掃描試驗找出瀝青之流變特性，配合再生瀝青混凝土的車轍試驗與力學試驗結果探討再生瀝青混凝土的永久變形行為，結果顯示，RAP添加量為40%之再生瀝青混凝土具有較高之老化瀝青有效反應量，且車轍試驗之塑性變形階段永久變形結果與流變性能一致，而孔隙率與級配影響了壓密階段與潛變階段之變形量，最後，利用攝影測量能清楚分析瀝青混凝土試體之整體變形，而測微器僅能量測單點之位移量。影響瀝青混凝土永久變形最重要的因素是級配之正確性，因大量使用RAP會使粒徑分佈曲線偏細，偏離目標級配曲線造成強度大幅降低。因此，本實驗建議將不同級配之RAP分開儲放及使用，提高級配之正確性，進而提高再生瀝青混凝土強度。

To help address the built environmental issues of asphalt recycling and pavement sustainability, strategies that make asphalt pavements recyclable and renewable have been investigated through laboratory measurements. In this study, the effects of asphalt rheology and reclaimed asphalt pavement (RAP) content on the engineering properties and permanent deformation of the recycled asphalt concrete (RAC) were investigated. In addition, a new method was developed to obtain the active asphalt binder content within the aged asphalt based on the TRL (Transportation Research Laboratory) best practice guide for recycling. The frequency sweeps testing using a dynamic shear rheometer was also conducted on the recycled asphalt binders to evaluate the rutting potential of the RAC. Test results showed that the RAC incorporating 40% RAP possessed the higher active asphalt binder content in terms of the Marshall stability. For the rutting performance of the RAC, air void content as well as the aggregate gradation played important roles on the densification and creep stages. The rheological behavior of the asphalt binder considerably affected the tertiary stage during the testing. It was also found that the aggregate gradation tended to be finer when the RAP content was added up to 70%, leading to the worst rutting performance of the RACs. In addition, the photogrammetry technique could be employed to measure the deformation depth and clearly interpret the distress modes of the RAC specimens during the wheel track testing.

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