本研究以再生粒料混合天然粒料達最緻密的體積堆積含量點作為主軸，增減前後10%，分別為再生細粒料佔總細粒料體積含量(30%、40%、50%)、再生粗粒料佔總粗粒料體積含量(30%、40%、50%)來探討其工程性質之影響，運用黃氏緻密配比法設計出高性能再生混凝土並改變水膠比(W/B=0.3、0.4、0.5)共27組實驗組配比，及緻密點前後再生粒料的影響程度，並與只運用天然粒料的控制組來做比較。試驗內容包括新拌性質(坍度、坍流度)，硬固性質(抗壓強度、劈裂強度、超音波速、熱傳導係數)，耐久性質(表面電阻、氯離子電滲、吸水率)之量測，以及運用微觀照片來觀察粒料和漿體間的介面過度轉換區，詮釋再生粒料的影響性。結果顯示，在適當的漿體量和強塑劑搭配下，坍度控制介於210~290mm，坍流度介於335~710mm之間，符合高流動性特質；硬固性質方面，隨著再生粒料含量的增加，其硬固性質越趨下降，而再生粒料取代量40%有所改善，在α1=40%其抗壓強度上升2.22~13.18%，β1=40%其抗壓強度上升0.49~4.81%；耐久性質方面，因所有配比均添加卜作嵐材料，91天電滲量均小於2000庫倫，91天電阻率均大於20 KΩ-cm。另外測試再生粒料在預飽和狀況下拌合比乾燥拌和抗壓強度品質較佳，在固定40%RFA，改變不同RCA含量時，抗壓強度上升4.34~18.20%；在固定40%RCA，改變不同RFA含量時，抗壓強度上升2.85~7.73%。

In this study which recycled aggregate were mixed with natural aggregate achieve the most densest volume point. This point not only being as the main axis but also increasing and decreasing 10% from this point. The recycled fine aggregate (RFA) accounted for 30%, 40%, and 50% of the total fine aggregate volume. Otherwise, the recycled coarse aggregate (RCA) accounted for 30%, 40%, 50% of the total coarse aggregate volume. The high-performance recycled concrete was designed based on Hwang's densified mixture design algorithm (DMDA) and the water-to-binder ratios (W/B = 0.3, 0.4, 0.5) were changed. Besides, the influence of recycled aggregate at densest point in the neighborhood was examined. The engineering properties of all mixtures were compared with the control groups only using natural aggregate. Test content, including fresh properties tests (slump, slump flow), hardened properties tests (compressive strength, splitting tensile strength, ultrasonic pulse velocity, thermal conductivity), durability tests (electrical resistance, charge passed of chloride ion, water absorption), and micro photos to observe the interfacial transition zone (ITZ) between aggregate and paste, were explained the influence of recycled aggregate. The results indicated that slump values from 210~290mm and slump flow values from 335~710mm was controlled by suitable paste and superplasticizer, conforming the high fluidity. In terms of hardened properties, the collected values decreased with increasing content of recycled aggregate, and replacement of 40% by recycled aggregate were improved. At α1=40%, its compressive strength increases by 2.22~13.18%；at β1=40%, its compressive strength increases by 0.49~4.81%. In terms of durability, due to the incorporation of pozzolanic materials, the charge passed values were lower than 2000 Coulombs at 91 days, the electrical resistance values were higher than 20 KΩ-cm at 91 days. Additionally, the compressive strength of the concretes prepared from recycled aggregate under pre-saturation condition was better than that prepared from recycled aggregate in oven dry condition. When 40% RFA was fixed and the RCA content was changed, the compressive strength increased by 4.34~18.20%. When 40% RCA was fixed and the RFA content was changed, the compressive strength increased by 2.85~7.73%.

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