目前鋼筋混凝土結構物受鹼質與粒料反應(AAR)影響，產生裂縫的維修方法，多以防水處理，但無法移除造成反應的鈉、鉀離子，使得維修成效堪慮。本計畫擬利用三年時間，進行(1) 建立電化學技術維修AAR 之鈉、鉀離子移除與鋰離子輸入理論模型，(2) 鋼筋混凝土通電方法對離子移除和輸入行為的影響、抑制AAR 膨脹的成效、及分別對鋼筋和混凝土工程性質的影響，(3) 確認鋰離子分別取代鹼矽膠體和水泥水化產物中鈉、鉀離子的能力研究。期望藉三年的研究結果，建立電化學技術維修受AAR 影響鋼筋混凝土結構物的設計方法，決定維修時的參數，釐清利用鋰離子維修的成效，以供將來理論和工程實務的參考，及根本解決重要結構物受AAR 影響後的維修問題。 The commonly used technique to repair the structure damaged by alkali-aggregate reaction (AAR) is to coat the structures by water proofing materials. However, the results of this repairing method are dependent on many variables, and the factors inducing alkali-aggregate reaction still exist in the concrete. This study intends to use three years to accomplish the following goals: (1) establishing the theorem model of using electrochemical techniques to drive lithium ion into the concrete for mitigating the reaction. At the same time, sodium and potassium ions are extracted out of the concrete eliminating the factor inducing AAR; (2) evaluating the behaviors of ionic migration for the different ways of electrical field, the effect of inhibiting the AAR expansion, and the engineering property of steel and concrete; (3) confirming the ability to substitute lithium ions for sodium and potassium ions in the alkali-silica gel and in the cement hydration products, respectively. From the study results, establishing the design method of the electrochemical technique for repairing AAR structure, deciding the repairing parameters, and evaluating the repair effect of the use of lithium ion. The results of this research will be the reference of theorem and practice for the future. 研究期間 : 9808 ~ 9907
