邇來在興建重要工程之時，主辦單位相當重視在施工前對粒料活性進行檢測，以避免使用活性粒料造成混凝土在數年後發生鹼質與粒料反應。在研析世界各國相關規範後，發現理論基礎相似之試驗方法，在相關試驗變數上多作模糊說明或有不同之規定，且對活性粒料的判定標準亦有不同，顯示許多國家都已建立起適合當地的試驗規範與判定標準。國內專家學者曾對本島29條河川進行粒料活性調查，其中至少有11條河川產的粒料結論不一致，因此本研究的目的在以接受度較高的ASTM C1293為基礎，釐清各種不同試驗間包括ASTM C289、C1260、C227、中國及日本蒸壓法、其他新發展方法及岩相分析等方法之相關性，提出適合於台灣地區活性粒料檢測方法之建議，以供日後建立CNS規範參考，避免誤用活性粒料影響混凝土耐久性。研究成果包括四個主要部份：1.對現有規範運用於台灣地區活性粒料之檢測結果、試驗方法間之相關性比較、適合於台灣地區活性粒料之判別標準檢討；2.岩相分析運用於鹼質與粒料反應之檢測研究；3.發展準確、快速且適合台灣地區活性粒料之檢測方法及判定標準；4.提出適合於台灣地區活性粒料之檢測方法及運用流程之建議。 Identification of aggregate reactivity is required in many concrete construction projects to reduce the possibility of inducing expansive alkali-aggregate reaction. However, many conflict results have obtained due to many parameters listed in the specifications are not clearly defined. Study of related specifications in the world, the test methods with the same philosophy contain different parameters and different accept level for non-reactive aggregate. The purposes of this research are to clearly establish a test method and accept level for identification of reactive aggregate in Taiwan. ASTM C1293, the concrete prism expansion test, will be the basis of this research. Different methods including ASTM C227, ASTM C1260, and improving methods are to be test. Tests including C289, C227, autoclave method, and petrographic examination of aggregates are used to compare the results of C1293 for defining the accept level for non-reactive aggregate. The results of this research will be the reference for establishment of CNS specification.
