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題名 | 垃圾焚化混合灰與水玻璃廢鑄砂集塵灰共融熔渣於水泥砂漿之影響=Effects of Conditioned MSWI Mixed Ash Slag on Cement Mortars |
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作 者 | 李增欽; 張介人; 王偉哲; 李宗勳; 張正成; | 書刊名 | 聯大學報 |
卷期 | 6:2 2009.12[民98.12] |
頁次 | 頁417-432 |
分類號 | 445.545 |
關鍵詞 | 垃圾焚化飛灰; 洗滌灰; 水玻璃集塵灰; 熔渣水泥砂漿; 卜作嵐反應; MSWI fly ash; Scrubber ash; Slag cement mortar; Pozzolanic reaction; |
語文 | 中文(Chinese) |
中文摘要 | 都市垃圾焚化後會有飛灰與洗滌灰之產生,兩者均因含有重金屬,而被視為有害事業廢棄物,必須妥慎處理以免污染環境。目前以熔融法處理飛灰資源化再利用之研究,已有良好成效,但洗滌灰無法熔融尚於研究探討中。 本文嘗試以台灣北部某垃圾焚化廠,依其飛灰與洗滌灰產出之比例1:3均勻混合,再添加適量之水玻璃廢鑄砂集塵灰,將其鹽基度S(S=CaO/SiO2)調配至1.1混合之,次而進行熔融處理,所得之調質熔渣進行毒性特性溶出試驗,其重金屬之溶出遠低於法規值,且該熔渣成份分析之結果,可視為卜作嵐材料使用。因此將熔渣粉末分別取代10%,20%、30%與40%水泥,灌鑄成5×5×5cm之熔渣水泥砂漿試體(實驗組),進行抗壓強度試驗等,其7天齡期以後之試體強度均比純水泥砂漿試體(控制組)為高,且28天、60天與90天之強度,約比控制組試體高出13~33%,呈現卜作嵐反應之結果。依本文試驗結果,該共融熔渣可適量取代水泥使用,似顯現可將此二種有害事業廢棄物資源化再利用之潛能。 |
英文摘要 | Fly ash and scrubber ash are generated after the incineration process. This two ash needs further processing as it contains heavy metals which may cause soil and ground water pollution. Although, good results have been demonstrated from cement paste and cement mortar specimens manufactured by replacing part of cement with slag powder obtained from municipal solid waste incinerator (MSWI) fly ash. Because scrubber ash of MSWI is difficult to be treated with melting, its recycle as a resource is still a challenge problem. In this study, fly ash and scrubber ash of MSWI were uniformly mixed with the weight proportions 1:3 of their individual product amount. This mixture was added with fly ash of foundry sand with the amount according to the basicity S=1.1. The 5×5×5cm slag blended cement mortar specimens were manufactured with 0~40% cement replacement by slag powder. TCLP tests and compressive strength tests were performed and the results obtained were analyzed for the specimens. The test results reveled that the leached heavy metals were far below the regulatory threshold. Their compressive strengths more than 7-day of slag blended cement mortar specimens were higher than that of control group; However, those of 28-day, 60-day and 90-day whose were higher than about 13-33% of those of control group, the results reveals of pozzolanic reaction. The results of this work demonstrate the feasibility of simultaneously recycling MSWI fly ash and scrubber ash as well as fly-ash of foundry sand as resources. |
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