【摘要】 本试验选用了内蒙古鄂尔多斯电力集团棋盘井电厂的粗粉煤灰,其活性指数为67.1%,达不到粉煤灰用于作水泥混合材料的国家标准(大于70%)。采用机械活化的措施——超细粉磨,将粉煤灰磨细到不同的细度和比表面积,这时粉煤灰的活性指数不仅合格,而且当将它掺入到P·II52.5等级的纯硅酸盐水泥中时,即使掺入量高达40%~50%,仍可得到P·F42.5等级或42.5R等级的粉煤灰硅酸盐水泥。这为扩大粉煤灰的利用提供了有效的措施。更多还原

【Abstract】 In this experiment, the coarse fly ash from Inner Mongolia Erdos Electric Power Group Qipanjin Plant is used, the activity index of the fly ash is 67.1%, which could not meet the requirements of GB index about mixed materials(>70%). By mechanical activation method——ultrafine grinding, to grind the fly ash to different fineness and surface area, and then the activity index of the fly ash is qualified, and when it is added to the P·II52.5 grade Portland cement, and even the ratio is up to 40%~50%, the P·F42.5 grade or42.5R grade of fly ash portland cement can be prepared, which provides an effective measure to expand the utilization of fly ash.更多还原