CARBONATED FLY ASH AS A CEMENT REPLACEMENT
    7.
    发明申请
    CARBONATED FLY ASH AS A CEMENT REPLACEMENT 审中-公开
    碳酸钙作为水泥替代品

    公开(公告)号:WO2017000075A1

    公开(公告)日:2017-01-05

    申请号:PCT/CA2016/050773

    申请日:2016-06-30

    CPC classification number: C04B18/08 C04B28/04 Y02W30/92 C04B20/023 C04B22/10

    Abstract: A process for producing a blended binder material containing high calcium fly ash, in particular ASTM Class C fly ash, is provided. The process comprises: (i) carbonating the fly ash with carbon dioxide; and (ii) combining the carbonated fly ash with a cement binder such as Portland cement. The carbonation process improves the performance of the high calcium fly ash and thus allows for higher amounts of the fly ash to be used with the cement binder in cement mix compositions such as concrete. The results presented herein demonstrate the benefits of the carbonation process on the rate of cement hydration, and on the compressive strength and the dimensional stability of the resulting cement products.

    Abstract translation: 提供了一种生产含有高钙飞灰,特别是ASTM C类飞灰的混合粘合剂材料的方法。 该方法包括:(i)用二氧化碳对飞灰进行碳酸化; 和(ii)将碳酸化飞灰与诸如波特兰水泥的水泥粘合剂组合。 碳酸化方法改善了高钙飞灰的性能,从而允许更多量的粉煤灰与水泥混合物组合物如混凝土中的水泥粘合剂一起使用。 本文给出的结果表明碳酸化方法对水泥水化速率的影响以及所得水泥产品的抗压强度和尺寸稳定性的好处。

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