- 學位論文
穩定化焚化飛灰再利用於混凝土磚之研究
Reuse of Cement-Stabilized Municipal Incinerator Fly Ash in Concrete Block
摘要
本研究將經水泥固化之焚化飛灰作為製作混凝土磚之骨材原料，期望達成焚化飛灰再利用之目的。焚化飛灰穩定化物之組成以鈣、矽為主。焚化飛灰穩定化物經烘乾、破碎前處理後，依田口式實驗設計法進行參數設計，以實驗型成型機台製作混凝土磚試體，脫模後經28天室溫養護後進行抗壓強度試驗，探討不同參數對混凝土磚抗壓強度之影響，並以28天養護抗壓強度最高的試體進行其重金屬長期溶出特性分析。 研究結果顯示混凝土磚28天最高抗壓強度可達440.7 kgf/cm2，已達CNS 3930-預鑄混凝土緣石之抗壓強度標準(250 kgf/cm2)，而由田口式實驗設計分析、反應曲面分析及變異數分析結果顯示水膠比對於28天抗壓強度之影響最大，玻璃骨材粗細比則是影響最小的控制因子。另外，由向上流動滲濾試驗法（NIEA R219.10C）及以擴散試驗測定成塊廢棄物材料中無機溶出成分（NIEA R217.10C）溶出試驗結果均可以發現混凝土磚試體中Pb、Zn、Cr、Cd及Cu的溶出量低於荷蘭BMD之標準，混凝土磚中焚化飛灰所含之重金屬具有長期穩定性，而由焚化飛灰穩定化物部分取代細骨材產製之混凝土磚具有良好的環境相容性。由酸可萃取物成分試驗得知，重金屬溶出量隨抗壓強度增加而減低。
並列摘要
In this study, cement-stabilized incinerator fly ash is used to replace part of aggregates to manufacture concrete blocks for the purpose of recycling. The main chemical composition of S/S fly ash is Ca and Si. S/S fly ash was pretreated (drying and crushing) before experiment. This study describes use of Taguchi design of experiments to find a optimal combinations of turning parameters like particle size of S/S fly ash, amount of blast furnace slag added, W/B, particle size of glass aggregate. Using experimental molding machine to produce concrete block specimens. Compressive strength test is performed after 28 days of curing at room temperature. Evaluate the affect of different parameters on the compressive strength of concrete blocks, and using the 28 days specimens which had maximum compressive strength for the test of long-term leaching of heavy metals. The results showed that the 28 days highest compressive strength of concrete blocks up to 440.7 kgf/cm2, reached CNS 3930 standard (250 kgf/cm2). Taguchi design of experiments, response surface analysis and ANOVA showed that W/B had the maximal influence on 28-day compressive strength, whereas particle size of glass aggregate had minimal influence on 28-day compressive strength. In addition, the results of column leaching test (NIEA R219.10C) and tank leaching test (NIEA R217.10C) showed the leaching of Pb, Zn, Cr, Cd and Cu from concrete block specimens is lower than the Netherlands BMD standard, indicated that heavy metals contained in concrete blocks have long-term stability, the product is environment compatible. JIS K0058 leaching test showed that the higher the compressive strength, the lower the leaching of heavy metals.