Its for an assignment on concrete mix specifications at collage. Usually when i mix it i just do it till i think it looks right. Theres a ratio something like 4 spades to half a bag of cement or something like that ive forgot.
You lead such an exciting life. Reading through an internet forum all day looking for spelling mistakes. (zzz)
As opposed to studying the ratio for mixing cement! I've only just come on here anyway and it was first post I saw