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石粉是在机制砂、石生产过程中产生的粉状物质,细度较大,以往人们常常弃之不用。但近年来的研究发现,适量的石粉能够完善机制砂的颗粒级配,同时在混凝土内部起到填充作用,有些石质的石粉还具有水化活性,能够参与水化反应,对混凝土性能有改善作用。那么,使用这些超细石粉配制混凝土对混凝土性能有什么影响?石粉的质量需从哪些因素考虑?如何对石粉掺量进行控制?石粉和泥粉有什么区别?对混凝土的性能会产生哪些影响?本期特别策划针对石粉在混凝土中的应用问题请专家进行探讨。
Stone powder is produced in the mechanism of sand, stone powder material, fineness, in the past people often abandon it. In recent years, however, it has been found that an appropriate amount of stone powder can improve the grain size distribution of the sand and at the same time, it can fill the interior of the concrete. Some stone powder also has hydration activity and can participate in the hydration reaction and improve the concrete performance effect. So, what are the factors that influence the performance of concrete? How to control the content of stone powder? What is the difference between the stone powder and the powder? What effect will the concrete have on the performance? This issue of special planning for the application of stone powder in concrete, please explore the experts.