硅酸盐水泥(以下简称水泥)至今仍是不可替代的建筑用胶凝材料,它的性能好坏直接关系到水泥混凝土建筑物的使用寿命。在水泥性能中水泥的细度也是很受人们重视的问题之一。表示细度的指标过去主要是用筛余和比表面积,现在尤其是多组分水泥的生产与应用,还应重视水泥的颗粒分布和各主要组分在不同粒级区的分布。适宜的颗粒分布能提高干水泥粉体堆积密度,也称容积填充率,从而降 Portland cement (hereinafter referred to as cement) is still an irreplaceable cementing material for construction. Its performance is directly related to the service life of cement concrete buildings. The fineness of cement in cement performance is also one of the issues that people attach great importance to. The indicators of fineness used to be sieved and specific surface area in the past. Now, especially for the production and application of multi-component cements, attention should also be paid to the particle distribution of cement and the distribution of major components in different grain-size regions. Appropriate particle distribution can increase the bulk density of dry cement powder, also known as the volume filling rate, thereby reducing