高石粉含量的水工混凝土水化产物微观结构研究

Study on Microstructure of Hydration Products of Hydraulic Concrete with High Content of Stone Powder

文章利用红外光谱、X射线衍射和电子显微镜等微观技术,试验探讨了不同石粉含量对混凝土干缩性的影响机理。结果显示:水工混凝土干缩率随石粉含量的增加表现出先增大后减小的变化趋势,24%石粉含量组的水工混凝土干缩率最高;由于石粉参与水化反应,其发挥的活性效应增加了水化产物。

By means of infrared spectroscopy,X-ray diffraction and electron microscopy,the influence mechanism of different content of stone powder on the shrinkage of concrete was investigated in this paper. The results show that the dry shrinkage rate of hydraulic concrete increases first and then decreases with the increase of stone powder content,and the dry shrinkage rate of hydraulic concrete in24% of stone powder content group is the highest. Since stone powder participates in the hydration reaction,its active effect increases the hydration products.