粉煤灰颗粒形态对水泥浆流动性和强度的影响

阿基 尔·, 彼得 罗·
意大利土木工程学院

摘要

粉磨工艺已被广泛用于提高粉煤灰的细度和性能。然而，大多数研究都集中在粉煤灰的粒径分布上，而颗
粒形态也是影响水泥浆性能的重要因素。本文针对球磨机和立磨机的三种不同粉煤灰，通过扫描电镜（SEM）观察
颗粒形态，计算球状破坏（球状颗粒在研磨中破碎成不规则颗粒的比例）。本文测试了水泥浆体的流动性和水泥砂浆
的强度，并研究了球体破坏与流动性和强度的关系。结果表明，球磨机中粉煤灰的球状破坏率超过 80%，而带分离
系统的立磨机中球面破坏率仅为 11.9%。球形破坏与流动性有显着关系。不同粉煤灰添加量下，水泥浆体的流动性随
着球形破坏的增加而降低。对于水泥浆体的强度，粒度分布和球形破坏都是关键因素。因此，球形破坏是评价粉煤
灰磨粉磨效果的重要测量指标。

关键词

地面飞灰；球形破坏；水泥浆；流动性；力量

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