Are these soil test numbers extreme?
Are these soil test numbers extreme?
(OP)
I'm trying to get edge and center lift numbers from a third party soils test report with Volflo 1.5. The numbers from the report are very high. It seems Volflo will not work with numbers outside of the USCS Plasticity Chart.
Are these numbers even possible? If so could anyone point me toward Edge/Center lift formula's?
0-4 ft sandy clay LL=65 PL=46
4-10 ft sandy clay LL=110 PL=78
10-20ft clay LL=105 PL=76
Are these numbers even possible? If so could anyone point me toward Edge/Center lift formula's?
0-4 ft sandy clay LL=65 PL=46
4-10 ft sandy clay LL=110 PL=78
10-20ft clay LL=105 PL=76





RE: Are these soil test numbers extreme?
I googled the software and it seems you are solving some unsaturated moisture migration problem. I'm not quite sure how Atterberg limits relate to unsaturated moisture movement or characteristic moisture curve relationships.
f-d
¡papá gordo ain't no madre flaca!
RE: Are these soil test numbers extreme?
What is the Linear Shrinkage(LS) for this material? As a general rule of thumb the PI should be around twice the LS. This relationship varies between 1.6 to 2.4 depending on the reactivity of the material.
RE: Are these soil test numbers extreme?
RE: Are these soil test numbers extreme?
I'd like to know more about the saprolite. The highest plastic limit I have encountered is bentonite, LL ranging from 500 to 600, PL ranging from 38 to 45. I have heard of a bentonite with an LL of 750 and a PL of 48. Other high results I have seen have been in Kaolin type clays with an LL range of 100 to 350 and a PL range of 32 to 40.
How much testing did the lab do? In my lab I am immediately suspicious of any PL above 30. My response to such results, much to the chagrin of my techs, is to split out 6 or 8 samples and farm them out to some of our sister labs which I use as a proficiency program, I don't charge the client <grin>.
Also was there any hydrometer analysis done on the material? For those results to be true there must be a very substantial silt content in the material.
I am more than willing to be proved wrong but my gut feeling tells that those results just cannot be correct.
I have a knowledge base of 25 sister labs to call on so I will contact them and see if anyone can add anything about saprolite or any other material with an extremely high PL. I will report any significant findings back here in this thread.