"tutall" > wrote in message
...
> 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.
>

No, he said void ratio. I wish he would 'splain what that be.