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最近几年,在利用粉煤灰中,增加了一种称作“磨细粉煤灰”的商品粉煤灰。它是用球磨机将收集到的原状干粉煤灰进一步磨细加工而成的,细度能达到0.080毫米筛余8%以下。由于粉煤灰并不具有独立的胶凝性能,主要用作混凝土的掺合料。研究结果表明,粉煤灰的活性主要与它的细度有关,越细,活性越高,掺入混凝土中的效果也越好。按我国国家标准的规定,用来拌
In recent years, the use of fly ash has added a commercial fly ash called “finely ground fly ash”. It is made by further milling the collected dry fly ash with a ball mill, and the fineness can reach more than 8% of the 0.080 mm sieve. Because fly ash does not have independent gelling properties, it is mainly used as a concrete admixture. The research results show that the activity of fly ash is mainly related to its fineness. The finer it is, the higher the activity is, and the better the effect of incorporation into concrete is. According to China’s national standards, used to mix