本文主要分成三部分，第一部分探討飛灰之類型與品質對高性能混凝土工程性質之影響，第二部分探討強塑劑之類型及不同種類強塑劑之混和對高性能混凝土工程性質之影響，第三部分探討強塑劑與飛灰聯合作用對高性能混凝土耐久性質之影響並與傳統混凝土單獨添加強塑劑與飛灰之情形比較分析。透過坍度、坍流度、初終凝、抗壓強度、超音波、電阻、電滲、SEM等試驗進行研究。試驗結果顯示，飛灰燒失量、表面電位及飛灰球數會影響混凝土之工作性，且飛灰燒失量愈高對混凝土之安全性、耐久性及經濟性也會產生不良的影響。新拌性質原則上在同一配比之下，強塑劑減水率愈高，混凝土流動時間愈短。硬固性質則隨強塑劑產生空氣含量之高低有關，空氣含量愈高對於混凝土之安全性與耐久性愈不好。另同質性強塑劑混和對高性能混凝土工作性、安全性及耐久性影響不大；不同質性強塑劑混和則會嚴重影響混凝土之工作性，但對混凝土之安全性與耐久性影響不大。添加強塑劑減水與添加飛灰填塞孔隙可個別增進混凝土之耐久性，並解析緻宻配比法設計高性能混凝土時同時添加飛灰與強塑劑耐久性設計之策略，結果顯示水膠比愈低，用水量愈低，飛灰量愈高，混凝土之耐久性愈佳。

This dissertation is mainly divided into three parts: the first part is to investigate the effects of the type and the quality of fly ash (FA) on engineering properties of High Performance Concrete (HPC), the second part is to investigate the effects of the type and blended superplasticizer (SP) on the engineering properties of HPC, the third part is to comparatively analyze that addition of both FA and SP as well as single addition of SP and FA as traditional concrete does on the durability of HPC. The tests include slump, slump flow, initial and final settmg time, compressive strength, ultrasonic pulse velocity, electrical resistivity, micrograph observation, etc. The result indicates that the LOI of FA, electric potential and number of FA particle do influence the workability of concrete. Moreover, the LOI of FA will detrimentally affect the safety, durability and economy of concrete. In principle, the fresh property with the same mixture proportion the higher the water reduction rate the shorter the flowing time of concrete. The hardened concrete properties are affected by air content in relation to SP, the higher the air content the worse the safety and durability of concrete. Also, the blended SP with the same chemical basis will be compatible each other and shows similar workability, safety and durability as one SP only. Blended SP with different chemical basis interferes with each other and has detrimental affect on workability, but has a little effect on safety and durability of concrete. Addition of SP to reduce water or addition of FA to fill porosity will increase the durability of concrete, and addition of both SP and FA together by densified mixture design algorithm (DMDA) is the best strategy for concrete durability. The result shows the lower the water-to-cementitious material ratio the lower the water content, the higher the FA content the better the concrete durability.

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