回收瀝青混凝土(Reclaimed Asphalt Pavement, RAP)為原有鋪面瀝青混凝土刨除料或挖除料，相較於新料，RAP可減緩自然資源的損耗，並可解決RAP閒置於拌和廠的問題；RAP由於黏結料老化，性質變為脆硬，對於抗裂縫能力可能降低，因此RAP的再生方式是國內鋪面界急需面對的課題。添加還原劑於RAP可能使再生瀝青黏結料(Reclaimed Asphalt Binder, RAB)的化學性質產生變化，進而影響物理性質，本研究先分析添加再生劑後的RAB物理與化學性質，再分析再生瀝青混凝土(Reclaimed Asphalt Concrete, RAC)工程特性，最後進行試驗道路鋪設，評估再生瀝青混凝土鋪面績效，透過一系列的分析，評估添加再生劑於再生瀝青混凝土鋪面使用於台灣公路之可行性。
試驗結果顯示還原劑對於RAP材料主要為稀釋瀝青精，已經老化的大分子無法還原成小分子，RAB質流特性無法恢復至新鮮黏結料的程度；添加回收料於瀝青混凝土使穩定值、流度值、間接張力與回彈模數均上升，孔隙率和粒料間孔隙(VMA)則下降。Pen85/100瀝青做為軟化劑有較高的廣分布指數，黏結料的化學結構較不穩定。使用再生劑RA75添加於40%RAP的試驗路段，廠拌數據顯示，老化瀝青與再生劑需要充分的養護時間混拌，使再生瀝青混凝土的性質提升。RAP添加量增加使回彈模數值提高，混合料性質由RAP主導；羰基(Carbonyl)官能基吸收峰往低波數位移，可做為判斷是否添加RAP之證據；再生劑RA75於指紋區內的吸收波形不隨添加RAP而消失，可做為是否添加再生劑之證據。試驗道路四個路段於觀測兩年間，鋪面狀況指標(PCI)值與抗滑值(BPN)良好，車轍值隨服務時間增加而上升，仍屬輕微；平坦度(IRI)值稍高與施工較有關；初期成果顯示，添加還原劑於再生瀝青混凝土具有可行性，長期績效須持續追蹤。

In this study, we first analysis the physical and chemical properties of Reclaimed Asphalt Binder (RAB) by adding different kinds and rate of Recycled agent (RA) in. Second, we research the engineering property of Reclaimed Asphalt Concrete (RAC). Finally, the test road is made and the performance of recycled asphalt concrete pavement is assessed. After series of analysis, we evaluated the probability of using RA in the reclaimed as-phalt pavement. Carbonyl functional group shifted to the lower wavenumber, which can be used to judge whether RAP was added. RA75 rejuvenator’s absorption waveform in the fingerprint region doesn’t disappear with the addition of RAP, can be used to prove RA is existed. The addition of RAP in the asphalt concrete results in increasing of Stabi-lized Value, Flow Rate, Indirect Tensile Strength and Resilient Modulus, but reducing of Void in Total Mix (VTM) and Volume of Voids in Mineral Aggregate (VMA). RA75 rejuvenator and aged binder needs adequate curing time to mix together to reach appro-priate property.

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