本研究探討市區道路使用轉爐石Basic Oxygen Furnace Slag (BOF)取代天然粗粒料，做為石膠泥Stone Mastic Asphalt (SMA)及密級配Dense Graded Asphalt Concrete (DGAC)瀝青混凝土面層，評估轉爐石密級配瀝青凝土(BOF DGAC)和石膠泥瀝青凝土 (BOF SMA)材料工程性質、產製、施工評估及鋪面績效。本研究於台南市中華西路一段及中華南路二段所進行轉爐石石膠泥瀝青凝土(BOF SMA)、轉爐石密級配瀝青混凝土(BOF DGAC)和天然粒料密級配瀝青混凝土(DGAC)試鋪路段施工前、後進行鋪面現況指標(PCI)、抗滑度試驗、平坦度試驗、車轍量試驗、鋪面密度試驗、Clegg Hammer鋪面衝擊試驗及鑽心試驗等績效評估。
試驗結果顯示平坦度試驗以天然粒料DGAC之IRI值比轉爐石瀝青混凝土上升趨勢大；車轍量試驗以粗粒料與粗粒料接觸產生粒料間互鎖機制之BOF SMA抗車轍能力較佳；Clegg Hammer鋪面衝擊試驗呈現BOF SMA和BOF DGAC路面結構較佳；抗滑度試驗顯示天然粒料DGAC平均BPN值有下降趨勢；鋪面現況指標(PCI)以BOF SMA和BOF DGAC鋪面現況較佳。數據分析顯示添加轉爐石可提升路面績效，目前所呈現結果以BOF SMA路面績效最佳，其次為BOF DGAC，最後為天然粒料DGAC，屬於短期績效，長期路面績效仍需持續觀察。須注意轉爐石粒型方正，粒料容易堆積緊密，且轉爐石表面孔隙較多，吸入孔隙中之瀝青視為無效瀝青，有效瀝青的減少，導致 VMA降低。轉爐石富含鐵質，當冷料經過乾燥爐加熱，溫度提升較天然粒料快速，乾燥爐的轉速及溫度必須調整穩定，減少拌和溫度上下起伏之情形。

Basic Oxygen Furnace (BOF) slag was utilized in this study to replace the natural coarse aggregates on Stone Mastic Asphalt (SMA) and Dense Graded Asphalt Concrete (DGAC). The engineering properties, production, construction and performance of asphalt concrete mixed with natural aggregate and BOF slag were investigated.
The test results showed that International Roughness Index (IRI) of traditional DGAC is more sensible than that of BOF DGAC. The resistance to pavement rutting for BOF SMA is better compared to other mixtures. The Clegg Impact Value (CIV) obtained using Clegg hammer test for BOF SMA and BOF DGAC are better than DGAC. Compared with the mixtures with BOF slags, the trend of British Pendulum Number (BPN) for NADGAC is decreased. In addition, the Pavement Condition Index (PCI) results exhibited that the BOF SMA had the better pavement performance. The use of BOF in the substitution of the natural aggregates for asphalt mixtures improves pavement performance. According to the short-term pavement performance, BOF SMA has the best performance, followed by BOF DGAC and DGAC. It is noted that asphalt mixtures containing BOF slags had relatively lower VMA due to the higher porosity compared to natural aggregates.

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