On Mar 17, 5:40*pm, Zz Yzx > wrote:

> grain size doesn't determine bulk density. *Size sorting does. *i.e.,
> if you fill a room with basketballs, there's a certain portion of
> voids between the balls. *Fill the same room with volley balls,
> softballs, baseballs, golf balls, marbles, or BBs, the void ratio
> stays the same, as long as the balls are of uniform size.

Forgive me, it's been a few decades since I've done this sort of math,
and only got through one year of calculus. But is this saying that a
10ft cube full of basketballs with have the same volume (not ratio) of
void space as the same space filled with BB's?

Am pretty sure this is wrong?

> The bulk density differences are due to different crystal structures
> and milling processes.

Makes pefect sense.