机制砂混凝土的流变性能敏感性分析

首先明确了质量敏感性定量分析的理论方法,在此基础上对机制砂混凝土流变性能相对于用水量变化的敏感性进行了试验研究,通过方差分析找到了显著影响因素。数据表明,特定组分细粉颗粒的增加,尤其是比表面积更大的硅灰的增加,可以降低混凝土相对于用水量的流变性能敏感性。这也对科学合理使用石粉含量较高的机制砂、尾矿砂等替代资源提供了新的数据支撑,为设计低流变性能敏感性混凝土或提高混凝土出机质量稳定性提供了新的技术思路。

Sensitivity analysis of rheological properties of machine-made sand concrete

The theoretical method of quantitative analysis of quality sensitivity is defined in this paper,the rheological property of machine-made sand concrete relative to the sensitivity of water consumption change is tested and studied.Through variance analysis,significant influencing factors are found.The data show that the increase of fine powder particles,especially silica fume with larger specific surface area,can reduce the rheological sensitivity of concrete relative to water consumption.It also provides new data support for the scientific and rational use of alternative resources such as machine-made sand and tailing sand with high content of rock fine,and provides a new technical idea for the design of low-rheological sensitivity concrete or improving the quality stability of concrete.