Estimating friction angle of clay 2

[temee]

Hi

Is it possible to estimate friction angle of clay for drained stability calculation? I heart that there is some software which is able to estimate friction angle based on clay-size fraction and some other parameters.

 

[BigH]

Thanks fattdad - but as you imagine, one must be careful about how the phi values were determined; they are not all the same! Trust all is well!

 

[Okiryu]

BigH, not sure about what tests these charts are base on. L & W did not mention it neither. Anyways, I was searching and found this interesting doc. See attached.

 

[BigH]

Thanks Okiryu. I've attached a few charts that I was given in a lecture by Wesley (Okiryu - same as I sent to you privately). Wesley (from Kiwiland) worked quite a bit in Indonesia and with residual soils. He puts forth the concept of "where does the Atterberg limit of a sample fall relative to the "A-line" - i.e., in a parallel sense to it. He figures this is more important in deriving behaviour than just plotting on the chart. I think that his graphs show this.

 

[Okiryu]

BigH, thanks for the charts. I was also able to interchange some emails with Dr. Wesley. He was very responsive and helpful. Thanks again !