石灰石粉混凝土的工作性能和力学性能试验研究

Test Research of the Working Performance and Mechanical Performance Limestone Powder Concrete

本文采用两种不同细度的石灰石粉进行了石灰石粉在混凝土中应用的工作性能和力学性能的应用研究。在混凝土中,随着石灰石粉的加入,可以提高混凝土拌合物的工作性能,并且在一定程度上能够提高混凝土的强度;选用比表面积等级同为400m^2/kg的石灰石粉、粉煤灰、矿渣三种掺合料进行混凝土试验对比研究,发现含石灰石粉混凝土的工作性能优于含矿渣混凝土,而早期力学性能优于含粉煤灰混凝土。含比表面积大的石灰石粉的混凝土性能更优越;两种掺和料复掺形式试验研究结果表明石灰石粉可以与粉煤灰或者矿渣等掺合料进行复配使用,复合掺合料的掺入总量40%为宜。

In this paper,two kinds of limestone powder with different fineness are used to study the performance and mechanical properties of limestone powder applied in concrete. In concrete,with the addition of limestone powder,the working performance of concrete mixture can be improved and the strength of concrete can be improved to a certain extent.Choose specific surface level with 400 m^2/kg of lime stone powder,fly ash,slag concrete test compared three kinds of admixture. It is found that containing limestone powder concrete performance is superior to the slag concrete,and the early mechanical performance is better than that of fly ash concrete. The performance of concrete containing limestone powder with larger surface area is superior. The experimental results of two kinds of admixtures show that limestone powder can be mixed with fly ash or slag,and the total amount of admixtures is 40%.