在重視環保的當下，回收瀝青混凝土(RAP)能否重複使用為未來發展的趨勢，也是解決砂石資源匱乏的一大因素，因此本研究使用40900 poises及28000 poises的RAP黏結料，以不同比例加入再生劑RA-75及RA-250，將兩者調製成1000、2000、3000 poises黏度值之再生瀝青膠漿，試驗其物理性質、流變性質、鋪面績效並了解兩者間之擴散作用。

　　試驗結果發現當RAP黏結料分別添加25％左右RA-75及30％
左右RA-250再生劑，可使RAP黏結料降至AC-20之規範針入度值，再生瀝青膠漿之軟化點值及黏度值，隨RAP黏結料添加比例增加而增加，且當RAP黏結料添加10％再生劑後，延展性即有明顯之提高，韌性實驗中，老化程度較低之RAP黏結料添加再生劑後，更能增加瀝青之黏結效果，RAP黏結料每增加20％之添加量，可明顯增加G*值，其δ值則明顯降低，若要達到SHRP所規定之G*/sinδ=1kPa，則再生劑需添加40％左右即可達到。傅立葉轉換紅外線光譜中得知，添加越多再生劑可為RAP黏結料補充消失的芳香油成分，可降低瀝青之老化現象。在考慮成本及各項試驗結果下，建議兩者拌合溫度為140度，若需以固定溫度110℃，則建議放置12小時，確保回收瀝青與再生劑分子間有明顯的擴散作用。

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