以活性粉混凝土製作低放廢棄物盛裝容器配比研究

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题名:	以活性粉混凝土製作低放廢棄物盛裝容器配比研究
作者:	顏兆國;YAN, ZHAO-GUO
贡献者:	土木工程學系
关键词:	活性粉混凝土;高完整性盛裝容器;熱養護;矽灰;Reactive Powder Concrete;Highly Integrated Container;Heat Curing;Silica Fume
日期:	2020-07-29
上传时间:	2020-09-02 14:29:59 (UTC+8)
出版者:	國立中央大學
摘要:	本研究主要分為兩大主軸，第一部分為活性粉混凝土的配比參數選擇，以水膠比0.22配比為基礎驗證不同石英砂粒徑分布對混凝土孔隙率的影響，並以3號石英砂做為製作混凝土試體的依據，調整減水劑及鋼纖維的添加以決定所需的工作性，選定減水劑及鋼纖維添加量進行不同水膠比配比流度控制，再利用振動台振動60秒方式製作試體；同時，為提升盛裝容器混凝土之品質，利用90℃熱水養護1天加速活性粉混凝土水化反應以改善內部微結構。第二部分為降低水膠比(W/B = 0.22、0.20及0.18)，針對活性粉混凝土的力學特性及體積穩定性製作多種配比之試體，一方面提出優化之活性粉混凝土配比，另一方面評估活性粉混凝土應用於盛裝容器上的潛力。試驗結果顯示，混凝土三種水膠比配比利用90℃熱水養護方法製作試體，進行抗壓強度、劈裂、直接拉力、孔隙率、體積穩定性、表面電阻率試驗，在硬固性質方面，因水化程度上升，以水膠比0.18配比試體表現較為優異，顯示降低水膠比確實能提高強度以抵抗外在衝擊；在耐久性質方面，因採用低水膠比及高溫熱水養護加速卜作嵐反應，三種水膠比混凝土配比性質差異並不顯著，在表面電阻率試驗結果方面，水膠比0.22配比試體電阻率試驗因孔隙率較高的影響故較其他配比低，較大的孔隙率將會導致電流更容易在混凝土內傳輸。本研究與先前研究團隊所使用之配比M進行比較，發現活性粉混凝土配比在抗壓強度及孔隙率試驗中具有較好的表現，顯示活性粉混凝土也適用於研發高完整性盛裝容器配比。 ;Based on the ratio of 0.22 water-binder ratio, the influence of different silica sand particle size distribution on the porosity of concrete, and No. 3 silica sand is used as the basis for making concrete, adjust the addition of superplasticizer and steel fiber to determine the workability,and use the vibrating table to vibrate for 60 seconds to make the concrete. In addition, in order to improve the quality of concrete container, use 90℃ hot water curing for 1 day to improve the internal microstructure of reactive powder concrete. Reduce the water-binder ratio (W/B=0.22, 0.20 and 0.18) and use hot water curing to improve the internal compactness of the concrete and improve its quality and service performance. The test results show that the three kinds of concrete proportions are hot water curing at 90℃.In terms of hardening properties, due to increased hydration, 0.18 water binder ratio shows that reducing the water binder ratio can increase the strength; in terms of durability, use low water binder ratio and high-temperature curing accelerates the reaction of pozzolanic reaction. There is no significant difference in the properties of the three concrete mixtures. In terms of the surface resistivity test,0.22 water binder ratio is lower than other ratios due to the higher porosity,large porosity will cause electric current to be transmitted in the concrete more easier. This study is compared with the mixture M, and it is found that reactive powder concrete has better performance in the compressive strength and porosity test, which shows that reactive powder concrete is also suitable for the development of high integrity container.
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