灰砂混凝土微孔结构的分数维初步研究

A PRELIMINARY STUDY ON THE FRACTAL DEMENSIONS OF LIME SAND CONCRETE

分数维几何是七十年代发展起来的一门数学分支,它用于描述高度不规则的物体表面性质。本文用分维来研究灰砂混凝土的微孔结构,研究表明,半径小于100A的微孔具有分数维性质。用压汞法测试了灰砂混凝土微孔的分数维,蒸压制度越强,分数维越小;水固比越大,分数维越大;钙硅比太大或太小都使其分数维增加。文中提出一个新的孔参数—均值孔径。

Fractal geometry is a branch of applied mathmatics in 1975,and it is used to describe the surface character of irregular bodies. This paper applies fractal demension to study the micropores structures of lime sand concrete,and concludes that it can be used to describe the microp-ores. Their radii are less than 100A. The fractal demensions of lime sand concrete are measured by MlP(mean indicated pressure) technique. The results have shown that the stronger the autoclaving schedules,the less the fractal demensions of lime sand concrete;the larger the water solid ratio(W/S),the larger the fractal demensions,and the calcium silicate ratio(C/S) has the effect on the fractal demensions of lime sand concrete. A pore structure parameter, mean pore radius is also proposed.