本研究探討轉爐石(Basic Oxygen Furnace Slag, BOF)取代粗粒料應用於密級配瀝青混凝土(Dense-Graded Asphalt Concrete，DGAC)及石膠泥瀝青混凝土(Stone Mastic Asphalt，SMA)鋪面績效。藉由現地檢測鋪面數據，評估轉爐石瀝青混凝土鋪面安全性、舒適性、耐久性績效，並進行生命週期成本分析(Life Cycle Cost Analysis, LCCA)。抗滑值試驗數據不因粒料不同而有太大明顯差異，夏季溫度升高，BPN有下降趨勢；冬季溫度降低，BPN反而有上升的趨勢；平坦度試驗以密級配瀝青混凝土比轉爐石瀝青混凝土之IRI值增加趨勢較大；Clegg衝擊試驗證明轉爐石瀝青混凝土路面結構具有抗衝擊的能力，而密級配瀝青混凝土CIV值增加空間有所侷限；車轍量試驗數據顯示轉爐石瀝青混凝土鋪面明顯優於密級配瀝青混凝土鋪面，轉爐石瀝青混凝土鋪面抗車轍能力及耐久性均較佳；生命週期成本分析結果顯示BOF鋪面相較於DGAC鋪面節省機關及用路人成本，BOF鋪面具有經濟可行性。本研究超過五年期間檢測，BOF試驗路段各項績效及經濟效益優於DGAC鋪面績效。

關鍵字：轉爐石(BOF)、生命週期成本分析(LCCA)

SUMMARY
In this study, the effects of Basic Oxygen Furnace Slag (BOF) instead of coarse aggregates on the performance of Dense-Graded Asphalt Concrete (DGAC) and Stone Mastic Asphalt (SMA) were studied. Evaluating the safety, comfort and durability of converter asphalt concrete pavement by in situ pavement testing and conducting Life Cycle Cost Analysis (LCCA). Test results show that the converter stone asphalt concrete pavement structure has the ability to resist the impact, resistance to rutting ability and durability are better. The results of the life cycle cost analysis indicate that the BOF pavement is economically feasible compared with the DGAC pavement, the BOF pavement reduce more costs for agency and pedestrian. For more than five years testing, the performance and economic benefits of the BOF pavement are better than DGAC pavement performance.
Key Words： Basic Oxygen Furnace slag(BOF), Life Cycle Cost Analysis (LCCA)

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