高速混凝土 鹼反應 質變 的 顯著 動因 包括 環境碳化、酸性 化學介質 侵蝕、以及 照護 不足。碳化 變化 中，大氣中的 空氣碳 與混凝土中的 氫氧鈣 發生 化合，生成 碳酸鈣沉澱 並 散發 鹼性 基質 流失，導致混凝土 空隙 中的 鹼性物質 降低，進而 耗損 其 抗侵蝕

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