• 沒有找到結果。

第五章 結論與建議

5.2 建議

1. 研究 計之水泥配料方程式雖可適用於無機廢棄物,建議仍需考量廢棄物所 含之物質,如重金屬;水泥旋窯系統雖可將重金屬封存於水泥礦物中,但在高 溫(1450℃)燒結下容易造成中某些低熔點重金屬的揮發而造成污染,需特別 注意

2. 由於飛灰為公告之有害廢棄物,添加作為水泥原料在燒結過程中會有廢氣產

,可針對水泥窯排放廢氣進行分析,探討飛灰與底渣 中有害物質在水泥窯中的流動性。

3. 飛灰與底渣作為水泥生料會降低水泥砂漿抗壓強度,一般規定養護齡期為 3、

7、28 天,建議延長養護時間,可更完整監控添加焚化灰渣對水泥強度長期影 響。

本 設

生,為避免造成二次污染

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附錄 A

不同燒結冷卻程序下矽酸三鈣、矽酸二鈣在光學顯微鏡下的特性 Hydraulic activity

Burning

condition Excellent Good Average Poor Heating Rate

Size of alite(µm)

Quick 15-20

- 20-30

- Slow (25)30-40 40-60(120) Burning Time

Size of belite(µm) (20)25-40(60)Long (15)20-25 - (10)15-20 - Short 5-10 Cooling Rate Quick - - Slow

Color of belite Clear Faint yellow Yellow Amber (Campbell,1986)

附錄 B

水泥細度換算表—氣透儀時間間距換算成細度

感謝台灣水泥公司提供

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