Max free fall for ready-mix concrete
Max free fall for ready-mix concrete
(OP)
Does anyone know of a code requirement that stipulates the maximum free fall that you can drop concrete from a ready-mix chute? I am aware of the possibility of segragation in this process, and feel sure that there must be a specific limit.
I have a pole to be direct buried in an augered hole and backfilled with concrete. I need to know the depth limit I can go to before requiring a treme or a concrete pump to be used.
Polecat
I have a pole to be direct buried in an augered hole and backfilled with concrete. I need to know the depth limit I can go to before requiring a treme or a concrete pump to be used.
Polecat





RE: Max free fall for ready-mix concrete
As a practical matter, concrete of moderate slump (4 to 6 inches) can be dropped 6 to 8 feet without significant issue.
RE: Max free fall for ready-mix concrete
and also after concrete touch the wet surface, do not allow the concrete spread more than 10'(diameter!)..
RE: Max free fall for ready-mix concrete
RE: Max free fall for ready-mix concrete
RE: Max free fall for ready-mix concrete
A steel pipe pile works almost like a tremie, itself. If you were placing concrete for a drilled shaft of the same depth, I'm not sure you could get the same results.
I do; however, agree with you and Jim6758 about other things causing segregation besides the drop height.