基于骨料球形度的透水混凝土配合比设计方法

Mix Proportion Design Method of Pervious Concrete Based on Aggregate Sphericity

为提高设计精度并制备具有目标性能的透水混凝土,选择实际工程中的2种典型骨料,用Image Pro-Plus图像表征了骨料球形度,同时测试并计算了透水混凝土骨架结构参数;基于骨料球形度对透水混凝土配合比设计方法进行了修正.结果表明,基于骨料球形度的透水混凝土配合比设计方法可适用于粒形较差的宽级配骨料,能显著提升透水混凝土配合比设计方法的精确性和可靠性,对透水混凝土实际工程应用具有重要指导意义.

To improve the design occuracy and prepare pervious concrete with target performance,two typical aggregates from practical engineering were selected.The sphericity of aggregates were characterized by Image Pro-Plus,and the skeleton structure parameters of pervious concrete were measured and calculated.Based on the sphericity of the aggregate,the mix proportion design method of pervious concrete was modified.The results show that the mix proportion design method of pervious concrete based on aggregate sphericity can be applied to aggregates with low sphericity and broaden size range,and can significantly improve the accuracy and reliability of the mix proportion design method of pervious concrete,which has important guiding significance for the practical engineering application of pervious concrete.