Constant Head Permeability Test
Constant Head Permeability Test
(OP)
We are trying to conduct the constant head permeability test in the lab. However, the head is not the same when a tube is connected to the outlet drain and the tube is raised or lowered. Now I have looked everywhere and I cant find where the tube outlet should be placed with respect to the permeameter in order to get consistant results when compared to other labs. Where is the outlet tube supposed to be placed. The ASTM 2434 shows it near the top of the permeameter but I dont think it was done intentionally because there is no variable for it.





RE: Constant Head Permeability Test
Following Darcy's law, you have Q=kia. So, you'll measure Q, you'll calculate i (deltaH/L) and you'll measure the cross-sectional area of the sample.
Enjoy and have fun!
f-d
¡papá gordo ain't no madre flaca!
RE: Constant Head Permeability Test
RE: Constant Head Permeability Test
Thanks again
RE: Constant Head Permeability Test
I would try referencing ASTM D5084, maybe you could get some additional information there.
Hope this helps at least a little.
RE: Constant Head Permeability Test
we have the same permeameter and the same constant head tank. any other ideas?