評估鋼筋混凝土的耐久性質主要依據碳化與氯離子滲透，然而碳化過程中改變漿體的物化性，如何影響氯離子滲透的行為仍無定論。有鑑於此，本研究探討砂漿碳化對其中氯離子分布的影響，進而推估其滲透行為。過程中，以水泥:砂重=1:2.75設計水膠比0.6之砂漿配比再以水淬高爐石粉部分取代水泥，分為三組試驗，分別使用不同的拌合與養護方式，包括拌合時摻入鹽水、浸泡鹽水中再碳化及交互浸泡鹽水與碳化，於不同齡期量測碳化深度與酸溶性、水溶性氯離子濃度。試驗結果發現，試體重量隨著碳化時間而增加，於齡期91天之含爐石粉砂漿試體碳化後，其碳化深度皆大於無添加爐石粉之砂漿，另外發現齡期28天與齡期91天之砂漿試體受碳化後氯離子分布變化不同，而添加爐石粉對於氯離子擴散程度也有所影響，碳化至28天時，皆會造成自由氯離子的濃度增加。

The durability of reinforced concrete is evaluated mainly by the carbonation and the chloride ingress. The carbonation modifies the physical and chemical properties of the paste. However, how the carbonation influences the chloride ingress is still in debate. In view of this issue, this study explored the influences of the carbonation on the distribution of the chloride ions and discussed the chloride ingress under carbonation. During the study, the mortar specimens were prepared at water:fine aggregates=1:2.75 and water-cement ratio of 0.6. In some specimens, the cement was partially replaced by the ground granulated blast-furnace slag (GGBS). Three kinds of the specimens with different mixing and curing methods were prepared, including the carbonated ones prepared with mixing or curing with salt water and the one with alternative carbonation and curing in salt water. Results showed that the weights of the specimens were increased by the carbonation time. At age of 91 days, the carbonated mortar specimens with GGBS had higher carbonation depth than those without GGBS. The distributions of the chloride ions were influenced by ages, carbonation, and addition of GGBS. With carbonation of 28 days, the concentration of the free chlorides was increased.

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