台灣的水庫淤泥每年所增加的淤積量約1460萬立方公尺，而挖掘淤泥的成本既高且沒有一個適當的方式可以處理淤泥，其處理方式多以堆積於置土場，造成不經濟也不環保的現象。淤泥中含有豐富的SiO2、Al2O3、Fe2O3及K2O等成份，可以提供燒製輕質骨材的所需原料，在適當的燒結溫度下以期可獲得質輕、低吸水性及高強度的輕質骨材，再加以控制燒結的持溫時間，希望可以在較低溫度即得到上述的良好性質。

　　本研究針對曾文水庫淤泥進行燒結，由於曾文水庫內的淤泥已提供一個適合燒製輕質骨材的礦物相組成，控制升溫條件以便在燒結溫度時可以提供一個理想的發氣反應，並在一燒結溫度範圍內來控制其胚體產生的黏滯度，在適當的黏滯度下以滯含氣體不使外逸，促使在燒結溫度時可以造成胚體的膨脹現象，並在快速的降溫條件下形成一高緻密玻璃質表面的輕質骨材。

　　將所得的燒結體以阿基米得法來量測其輕質骨材體密度及吸水率等性質，發現已可以得到較質輕且有較低吸水率的輕質骨材，進一步的以MTS來量測其輕質骨材的抗壓強度，在本研究中其溫度在高於1250℃以上即可以得到輕質骨材，其抗壓強度已達33MPa～7MPa。

　　由BCA所規範量測輕質骨材的方法來評估本研究所燒製的輕質骨材，在本研究中可以得到其Strength/weight值在1.96的輕質骨材，其燒製條件為1250℃持溫2小時，顯示以曾文水庫淤泥燒製的輕質骨材其性質已足以為工程上所使用。

　With the rapidly depositing sludge in reservoirs of Taiwan, proper and economical disposal of sludge in reservoirs has become an urgent subject confronted by Taiwan. The chemical composition of sludge in the reservoir is mostly SiO2, Al2O3, Fe2O3, K2O, which could make the major composition of lightweight aggregate. This research hopes obtain light weight, porous, high strength lightweight aggregate under proper sintering conditions.

　This research investigated the sintering behavior of sludge in Tseng Wen Reservoir for lightweight aggregates, by sintering and promoting bloating the bulk made of sludge under controlled conditions of varying temperature, time. SEM, XRD, MTS, DTA, Ta-Mass techniques were used to examine the thermal treatment properties, including the bloating mechanism, microstructure, and crystalline variations.

　As for the compressive strength of lightweight aggregates which is about 33MPa～7MPa under sintering temperature 1250℃～1300℃. Follow in BCA ( British Cement Association ) procedure to estimate lightweight aggregates, the value of strength/weight is 1.96 under sintering condition 1250℃/2hours. And the lightweight aggregates that this research investigated are already enough to use for the construction.

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