Check the following:
Stark, 2005, 1997 and 1994 - all published in ASCE Geoetch Journal
Mesri, 2003 - published in ASCE Geotech Journal.
These publications provide specific discussions on the use of Atterberg limits and CLay Fractions as itr relates to residual strengths ...
Bob:
I will let RCEJD respond, but I understood his comment to be more of an issue of misunderstanding the legal ramifications which appeat to be occurring in previous posts. This had nothing to do with the engineering professional opinions.
With all due respect to some of the discussions, the postings on this thread that appear to discount a checks and baalnce system that are generally followed by prudent engineers is of bigger concern than the belief that the standard of care (better stated custom and practice) is no backup tests...
