近年來全球因地球暖化日益嚴重，回收廢物循環再利用之環保永續概念為一個重大的議題，而依據交通部數據顯示，國內鋪面材料大多採用瀝青混凝土(Asphalt Concrete, AC)(柔性鋪面)，而其損壞後經刨除會產生大量之瀝青混凝土刨除料(Reclaimed Asphalt Pavement, RAP)，所以國內致力於運用道路刨除之RAP於再生瀝青混凝土(Recycled Asphalt Concrete, RAC)中，使廢棄物得以運用且降低新鮮材料需求量，但為了確保鋪面之品質，使用RAP之配比設計較新鮮瀝青複雜且限制RAP添加比例，導致許多RAP料堆置於瀝青廠且已過度老化，故本研究為了使運用上更為彈性，使用不同老化程度之RAP和不同之RAP添加含量分別為0%、20%、30%與40%進行試驗，且鋪面添加RAP後，常還未到預計使用年限即損壞，危害行車和人之安全，本研究考慮國內氣候與RAP材料之影響，使用間接張力強度試驗(IDT)、漢堡車轍輪跡試驗(HWTT)、間接張力開裂試驗(IDEAL-CT)、四點彎曲試驗(4PBT) 及水侵害試驗(Moisture Damage)等鋪面績效試驗，深入了解並互相探討比較，進而對國內鋪面疲勞及開裂之行為相關研究有所助益，最後導入績效平衡配比設計(BMD)之概念，使鋪面能擁有抗開裂、抗車轍及抵抗水侵害之平衡性能。根據試驗結果顯示，當使用針入度較小之瀝青膠泥和RAP、使用較大標稱最大粒徑之粒料、添加較多之RAP含量或加劇老化程度時，CT_Index值下降，與四點彎曲試驗之結果值ε_6有相同之趨勢，但間接張力值、穩定值、車轍有相反之趨勢；比較CT_Index參數間關係，得出m_75較能直觀看出與CT_Index值關係；繪製三軸績效圖，雖本研究數據皆無法在平衡規範建議值之範圍內，但可以得出使用19 mm標稱最大粒徑及基底瀝青AC10，並添加30%和40%之RAP2時，較能有接近規範建議值，兼具有抗開裂、抗車轍和抵抗水侵害三者之平衡特性，然而，也發現本研究材料較難符合TSR規範值，故推測單純新鮮瀝青無法同時滿足抗開裂、抗車轍和抵抗水侵害三者之平衡特性，故需使用額外添加劑或等級較高之瀝青膠泥。

In recent years, global warming is increasingly influencing the climate, and the concept of environmental protection and sustainability of recycling waste have become a major issue. According to the database obtained from the Ministry of Transportation and Communications, the majority of pavements in Taiwan is constructed with asphalt concrete (AC) (flexible pavement). The milling operation are performed when the pavement deteriotations occur so that huge amounts of reclaimed asphalt pavement (RAP) are generated and piled in the asphalt plants. Incoporating RAP in recycled asphalt concrete (RAC) has been a solution to address this environmental issue. However, due to the complexited of RAC together with the variance in RAP properties, the quality of pavement is always a primary concern within the service life. The objective of this study was to evaluate the effect of RAP content on performance characteristics including rutting and cracking. Indirect Tensile Strength Test (IDT), Hamburg Wheel Tracking Test (HWTT), InDirect TEnsile AsphaLt Cracking Test (IDEAL-CT), Four Point Bending Test (4PBT), Moisture Damage were conducted on the recycled asphalt mixtures. In addition to laboratory testing, Balanced Mix Design (BMD) approach was utilized to interprete the engineering properties associated with balanced performance for the mixtures. The test results show that a decrease in CT_Index was exhibited for the recycled asphalt mixtures with higher RAP content and larger nominal maximum aggregate size (NMAS). The long-term aging process for the mixtures also results in lower value. It is found that CT_Index value is very sensitive to the m value of slope which is at the post-peak load stage. In terms of the balanced performance among rutting, cracking and moisture damage, it is concluded that no asphalt mixture can meet these three performance requirements in this study. The NMAS 19 mm asphalt mixtures (AC-10 base asphalt) with 30% and 40% of RAP2 perhaps can achieve the balanced performance. It is also found that the TSR is a rigrous indicator for evaluating the water sensitivity for the asphalt materials. The use of additives or modified asphalt should be are required in order to ahieve the balanced performance for the recycled asphalt mixtures.

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