粒料是瀝青混凝土的主要組成，由於天然粒料的匱乏，使用替代粒料是不可避免的趨勢，現今瀝青混凝土刨除料(Recycled Asphalt Pavements，RAP)和焚化爐底碴(Bottom Ash，BA)皆可作為替代粒料使用，因此本研究欲探討此兩種材料同時添加至瀝青混凝土之可行性。
利用馬歇爾配合設計求得在20%RAP下添加不同含量之底碴(0%~30%)之最佳瀝青含量，接著在最佳瀝青含量下比較不同含量RAP與底碴對工程性質的影響，最後利用掃描式電子顯微鏡(Scanning Electron Microscope， SEM)分析純天然粒料、RAP與底碴之粒料包裹瀝青前後在微觀結構上之差異，最後觀察分析底碴含量上升時瀝青薄膜厚度的變化，並且與理論公式進行比較。
工程性質的結果顯示，RAP含量越高表示老化瀝青含量越多，因此瀝青混合料的整體勁度上升，可以彌補底碴材料本身結構較弱的部份；使用40%RAP%與30%底碴的瀝青混凝土仍然擁有良好的工程性質。微觀結構部分，三種粒料的表面結構組成有所差異，因此粒料受到瀝青包裹後呈現的形態也不盡相同，由於天然粒料與RAP的粒料微觀結構較為相似，經由瀝青包裹後無法清楚的分辨此兩種粒料，此外，觀察純RAP製成的瀝青混凝土可發現黑石頭現象。瀝青薄膜厚度的數值會受到粒徑尺寸的界定以及放大倍率的不同導致差異很大，由於瀝青混凝土變異性很大，因此瀝青薄膜厚度無法均勻地在試體中觀測而得，本研究驗證在放大倍率10000倍下，瀝青膠漿內的薄膜厚度與理論計算結果接近。

Aggregate is the major ingredient in asphalt concrete. Because of the lack of nature resources, using secondary aggregate to replace nature aggregate is an inevitable trade.Both of Recycled Asphalt Pavements and Bottom Ash can be used in asphalt concrete, so this research is going to evaluate the feasibility of the engineering properties of bituminous mixtures contained with bottom ash and reclaimed asphalt pavement.

This research can be divided into three parts. In the first part, I will try to find out what the optimum asphalt content is in specific condition which is based on 20% RAP with 0% to 30% BA by using Marshall Mix design. The second part focuses on how the engineering properties of bituminous mixtures will be influenced by different percentages of RAP and BA. In the last part, I’ll use Scanning Electron Microscope to observe the micro-structure of nature aggregate, RAP, and BA which are all coated with asphalt. In addition, I will also analyze how the asphalt film will be changed when BA content increases, and compare the result with the theoretical formula.

From the research, it shows that the increase of RAP percentage will cause higher stiffness of asphalt concrete mix which can also make up for the weakness of BA aggregate structure. This research gets a good engeering property with 40% RAP and 30% BA. According to the micro-structure analysis, differences can be easily found between BA and RAP, while it’s hard to distinguish RAP from the natural aggregates, especially when they are coated with asphalt, it becomes much more difficult. Besides, black rock are found in asphalt concrete mix with 100% RAP, it means the adhesion between asphalt and aggregate isn’t quiet good.The thickness of asphalt film will be affected by not only the size of aggregate but also the magnification. However, the average thickness of asphalt film can’t be observed in the asphalt concrete because of its high variablilty. The silimar result with theoretical formula can be obtained in 10000 magnification.

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