本計畫主要工作目標在期初報告時便已確認為兩大項目，分別 為（1）充分利用建研所新置設備，協助建立操作手冊與管理辦法，
並將操作經驗傳承後續試驗人員。（2）針對混凝土暴露環境氣候條 件對氯離子滲入深度（速率）之影響。研究於今年三月開始執行至 今，雖為期僅八個月，但在建研所充分協助下，業已完成大部份工 作，並已獲致下列研究成果。
（1）儀器部份：
本計畫研究主要所使用之鹽霧複合耐候試驗機、壓汞孔隙量測 儀、離子層析儀等三項儀器。均為建研所材料實驗群耐久耐候實驗 室新購置之試驗設備。於 93 年 4 月驗收後，相關研究人員隨即進 行操作訓練之工作迄今，並獲致下列成果：
1. 研究人員均接受鹽霧複合耐候試驗機、壓汞孔隙量測儀、離 子層析儀等三項主要儀器訓練。並具操作熟練之能力。
2. 完成壓汞孔隙量測儀操作手冊。
3. 協助建研所完成三項儀器管理辦法草案之擬定。
（2）混凝土耐久性研究部分：
此部份之研究計畫中以各種水灰比為變數製作各種混凝土配 比，並利用外加電壓加速與由鹽霧複合耐候試驗機模擬海域環境氣 候劣化等機制，對混凝土進行氯離子入滲深度與速率評估方法研 究。而混凝土入滲混凝土後，相關氯離子與孔隙組織分析工作藉由
建研所新設置的壓汞孔隙量測儀與離子層析儀進行，除此之外亦對 各配比壓力強度進行試驗。迄今已獲致之研究成果如下：
1. 由孔隙結構量測試驗可以發現，在水灰比改變之配比部分，
其孔隙大部份分布在 3 至 150 nm 之間。而無論強度、或各 種試驗所得之氯離子入滲深度與速率均與在總貫入量有良 好的線性關係，但在 50 nm 至 10000 nm 的孔徑範圍的孔 隙，則其關係性開始變差。
2. 在 RCPT 的總通過電量試驗結果與 ACMT 的氯離子傳輸速 率試驗結果均可以發現，其與水灰比改變之混凝土配比抗壓 強度之間有一定之關係；但若考量混凝土添加礦物摻料後，
卻發現兩者並無存在一定之關係。由於抗壓強度反應的為試 體整體平均性質，而氯離子僅在連通孔隙中移動，因此並不 能單以抗壓強度判斷混凝土抗氯離子穿透特性。
3. 鹽霧耐候試驗結果可以發現在模擬環境試驗循環 4 星期 後，水灰比在 0.40 以下時，氯離子進入混凝土內的深度約 為 1.50 公分以內，而水灰比在 0.45 與 0.50 時，可進入 2.00 公分，在 0.55 以上時，則可進入 2.50 公分。若以其非穩態 氯離子擴散係數來看，其與孔隙結構試驗中的總貫入量略呈 線性關係，而亦與 50 nm 孔徑以上的孔隙數量較無任何關 係。在與以外加電壓為機制的 ACMT 與 RCPT 試驗相較，
則三者略呈現線性之關係，但仍待相關較多試驗結果出來 後，才可確認氯離子擴散係數與 RCPT 和 ACMT 試驗三者 之關係。
後續相關之研究在於協助建研所建立完整的儀器管理辦法，並
將各種儀器操作方法移轉至實驗室相關人員，俾使後續儀器營運正 常。而在研究結束前，密切與建研所研究人員互相研討，將儀器研 究過程中所獲得之操作經驗互相交流，並建立經驗傳承之工作。
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