基于DIP技术的灰岩、花岗岩及砂岩人工砂粒形特征比较研究

Comparative study on shape features of limestone, granite and sandstone manufactured sands using the DIP method

灰岩、花岗岩和砂岩的矿物组成各不相同,都可以生产人工砂。本文基于DIP技术,研究了灰岩、花岗岩及砂岩人工砂粒形特征,并进行比较。研究发现,灰岩人工砂的纵长比最大,扁平比和粒形因数居中,球度最小;花岗岩人工砂的纵长比居中,扁平比和粒形因数最小,球度居中;砂岩人工砂纵长比最小,扁平比、粒形因数和球度最大;凸起比和丰满比相差较小。综合来看,灰岩人工砂比较狭长,花岗岩人工砂比较扁平,砂岩人工砂比较浑圆。

Three types of manufactured sand were produced with different mineral compositions of limestone, granite and sandstone, and their shape features were compared and examined using the DIP method. The results indicate that, of the three types, limestone sand has the largest lengthwise ratio and smallest sphericity with its flatness ratio and particle shape factor in the medium range; granite sand has a medium lengthwise ratio and sphericity and the smallest flatness ratio and particle shape factor; sandstone sand has the smallest lengthwise ratio and largest flatness, particle shape factor and sphericity. Overall, limestone sand is long and narrow, granite sand is flat, sandstone sand is perfectly round.