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上海是我国最大的工业中心,发电厂粉煤灰排除量逐年在增加,据初步估计,每年排灰量已达100万吨,造成不少问题。国内外经验表明,利用粉煤灰作混凝土和砂浆的掺合料,可以节约大量水泥。上海地区亦曾试用磨细粉煤灰作混凝土掺合料,效果是良好的。但目前,粉煤灰的加工磨细还停留在试验阶段,不能满足工地及搅拌站的需要,而且磨细粉煤灰经过加工及中间运输,成本也较高。为此,我局在推广磨细粉煤灰的同
Shanghai is the largest industrial center in China. The removal of fly ash in power plants is increasing year by year. According to preliminary estimates, the annual amount of ash discharged has reached 1 million tons, causing many problems. Experience at home and abroad shows that using fly ash as admixture for concrete and mortar can save a lot of cement. In Shanghai, powdered fly ash was also used as a concrete admixture. The effect was good. However, at present, the processing and grinding of fly ash is still in the experimental stage, and it can not meet the needs of the construction site and the mixing station. Moreover, the finely ground fly ash is processed and transported in the middle, and the cost is also high. To this end, the Bureau promotes the use of milled fly ash