骨料含粉对水泥基材料作用效应研究  

Effect of limestone powder on cement-based materials

作　　者：何彦琪 李曦 田青 张圆 HE Yanqi;LI Xi;TIAN Qing;ZHANG Yuan(China Construction Western Construction Hunan Co.,Ltd.,Changcha 410075,China)

机构地区：[1]中建西部建设湖南有限公司,湖南长沙410075

出　　处：《混凝土》2020年第11期89-92,共4页Concrete

摘　　要：掺石灰岩所含石粉的水泥砂浆抗压强度为评价指标,以惰性石英岩石粉为基准,采用现象学研究方法解耦了石灰岩含粉在水泥基材料中的稀释效应、级配效应和异质成核效应。研究结果表明:稀释效应随石灰岩石粉掺量的增大线性增大,级配效应随其细度的增大变化较小,其对于水泥基材料的强度发展属于次要因素,石灰岩石粉异质成核效应随其掺量增大呈先增大后减小的规律,随水泥水化龄期的增大逐渐减小。异质成核效应最大时,水泥-石灰岩石粉胶凝体系达到最优配合比,即异质成核效应决定了石灰岩石粉的最佳掺量。The dilution effect,packing effect and heterogeneous nucleation effect of ground limestone in cement-based materials is decoupled using the phenomenological method.The compressive strength of the cement mortar as the evaluation index and ground quartz as the base for ground limestone.The results show that the dilution effect increases with the increase of ground limestone content linear,packing effect increases with fineness of ground limestone however the change is small.The packing effect is the secondary factors.the heterogeneous nucleation effect of powder increases first and then decreases with the amount of ground limestone increases,and decreases with the increase of cement hydration time.The cement-ground system achieve the optimal ratio when the heterogeneous nucleation effect is the largest,so the heterogeneous nucleation effect determines the optimal amount of powder.

关 键 词：石灰岩石粉 稀释效应 级配效应 异质成核效应 

分 类 号：TU528.041[建筑科学—建筑技术科学]