摘要
本論文以混凝土坍流度試驗來求羧酸強塑劑之最佳劑量，使有添加卜作嵐材料之高性能混凝土達到最佳工作度。卜作嵐材料為飛灰和爐石粉，二者比例分別為3：7、4：6和5：5三種，添加之強塑劑為羧酸系聚合物 CSC-620。 試驗結果顯示，在水灰比為0.4之條件下，卜作嵐材料比例3：7、4：6和5：5混凝土之強塑劑最佳劑量分別為1.72%、1.67%、1.65%，最佳劑量隨著飛灰之添加量減少而降低。當劑量少於1.2%時，混凝土幾乎無法流動；當劑量為1.8%時，混凝土開始產生泌水、析離現象；而當超過1.8%時，泌水及析離則非常明顯。此外，在各項混凝土流動試驗或抗壓強度試驗中皆證明強塑劑之最佳劑量均約為1.7%。試驗結果亦顯示，隨著飛灰之添加量減少，抗壓強度亦降低。
並列摘要
The thesis used the flowing-slump test to determine the optimal dosage of the polycarboxylic acid (PCA) superplasticizer, whick was able to make the high performance concrete containing pozzolan materials to reach the best working ability. Pozzolan materials used were fly ash and slag powder with three kinds of ratio 3:7, 4:6 and 5:5. The added PCA superplasticizer was the CSC-620. The test results showed that, under the condition of water ratio 0.4, the optimal dosage of superplasticizer was 1.72%, 1.67% and 1.65% respectively in concrete with pozzolan material ratio 3:7, 4:6 and 5:5. The optimal dosage decreased when the added fly ash decreased. If the dosage was less than 1.2%, the concrete could hardly flow. When dosage was 1.8%, the concrete began bleeding and segregating. When it was over 1.8%, the bleeding and segregating became seriously. Moreover, other concrete flowing tests and the concrete compressive strength test also showed that, the optimal dosage was about 1.7%. Besides, the result also showed that, the compressive strength decreased when when the added fly ash decreased.