Here's my question: I am working on the settlement of a proposed grain bin which has appx 6' stemwalls, 4' wide footing at base of stemwalls whereas the footing is exposed on the outside of the stemwalls but the inside of the stemwalls is backfilled with granular material to 6" below the top of...
So I am running falling head perms on both remolded and shelby tube samples and I notice that mainly in some shelby tube samples after about a 5 days soak period and when i begin taking readings there is an occation that a sample may not drop. Even after an entire day it does not drop even 1...
Ok, here's a new question that I'm sure will have alot of different answers. I am running falling head perms using a compaction mold. How do you judge times that it takes to saturate a recompacted sample? Is there a time of saturation calculation that I can use or do I just have to follow the...
Ok, here's a fairly simple one. I have a contractor looking for us to run a proctor, perm, hydrometer, atterberg limits test on a sample of silt with a mix of bentonite for a liner material. The contractor wants to add 1.5 lbs of bentonite per square foot of surface area (6" lift) in the field...
I have a simple question that I hope someone could answer. What method do you use to compact the material in the mold to acheive 95%? Obviously you need a specific amount of soil in the constant mold volume to produce a density. I calculate the amount of soil needed and place it in three lifts...
Can anyone help me with a problem I have been having with my falling-head perm test that I am trying to set up? I am using a compaction mold which uses a 3/8" O.D. 1/4" I.D. clear pastic hose to create the head. What I am trying to do is keep the air out of my system. It seems as if the plastic...
