本研究主要是針對國內設有燃燒生質燃料之鍋爐廠，進行衍生灰渣材料特性與資源化再利用技術之可行性研究。並依國內鍋爐廠的使用現況選定兩種類之生質燃料：（1）棕櫚殼、（2）廢棄養菇太空包製成之木顆粒，依據上述兩種燃料燃燒後衍生之飛灰及底渣，進行土木材料相關之物理性質及化學性質基本檢試驗，探討其材料之特性並建立各衍生灰渣之基線資料。 依據材料之特性採用不同之再利用可行技術並作合適性評估，以達成資源循環之最大效益。本研究所採用土木材料再利用技術包含（1）控制性低強度回填材料CLSM、（2）高壓混凝土磚以及（3）人造粒料。於各種再利用試驗結果上顯示生質燃料衍生灰渣應用於土木工程材料或水泥製品皆具有一定的再利用成效及經濟效益。 從特性實驗結果得知，本研究使用之生質燃料飛灰中菇包飛灰具有吸水率高、殘碳量高之特性，摻配於水泥砂漿有緩凝及強度下降的現象，且變異性過大可能會影響再利用發展。本研究透過水洗的再處理方式有改善菇包飛灰緩凝的狀況。而棕櫚殼飛灰由於粒徑較粗有活性較低的現象，因此對棕櫚殼飛灰進行研磨再處理，經由砂漿試驗得出強度活性有提升的效果。另外，使用高溫燃燒飛灰的方式試圖降低飛灰的殘碳量，卻得到隨燃燒溫度提升而砂漿強度下降的結果，推論是由於過高溫度造成飛灰燒結團聚與晶相改變而強度活性指數下降的現象。 ;This research aims at the derived fly ash and bottom ash which are produced by the domestic boiler plants burning biomass fuel, and clarify the properties of these waste and the feasibility of their reuses. According to the current status of the domestic boiler plant, two types of biomass fuels are selected: (1)palm kernel shells, (2) the wood pellets made of abandoned mushroom bags. According to the characteristics of the materials, three different reuse methods are used in this study including (1) Controlled Low Strength Material, CLSM, (2) compressed concrete bricks, and (3) artificial aggregate. The result of reuse tests shows that utilization of the biomass fuel derived ash in civil engineering materials bring about certain effectiveness and economic benefits. Because water absorption and loss on ignition of Mushroom bags fly ash (MFA) are high, when blending MFA in cement mortar will delay the setting time and decrease the strength. And excessive variability may affect the reuse of this kinds fly ash. In this study, using the re-treatment of washing MFA can improve the problem of setting time. The strength activity of palm kernel shells fly ash(PKSFA) are lower than the general coal fly ash due to the coarse particle size. Therefore, ground the PKSFA to increase the specific surface area, that would improve the strength activity of the blended cement mortar. That may since the agglomeration and crystallization of glassy phase of the particles occurred during the heating process.
