| Summary: | 碩士 === 國立中央大學 === 土木工程學系 === 103 === This research is focused on how Global Warming Potential (GWP) was influenced by natural aggregates and replacement of coarse natural aggregate with steel slag on Dense Grade Asphalt Concrete (DGAC). Two types of steel slag, Basic Oxygen Furnace (BOF) and Baosteel’s Slag Short Flow (BSSF) slag were used to replace coarse natural aggregates. By using GaBi 6 Education software, this research discovered GWP which caused by pavement’s activities. Replacement of coarse aggregate with steel slag including BOF or BSSF slag will increase GWP. According to the simulation result, the GWP will increase varies depending on the amount of aggregate used. By using 10%, 20%, 30% and 100% steel slag which replace coarse aggregate in surface layer, GWP was increase between 4.78% until 7.13% compared to the traditional DGAC. However, based on construction cost point of view, using steel slag give significant benefit. The results show that by using BOF or BSSF slag save 3.66% (DGAC 10% steel slag) until 36.47% (DGAC 100% steel slag) of total cost compare to traditional DGAC. Based on the results of GWP simulation and cost analysis, replacement of coarse natural aggregate with steel slag (BOF or BSSF) in DGAC is acceptable and worthy of further research.
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