Coefficient of friction
Coefficient of friction
(OP)
My client is asking for “ratio of friction angle at soil-concrete interface to the effective friction angle of soil” to be included in our soil reports. Please anyone explain isn't it the Coefficient of friction actually?
Jaleel Ur Rehman
Geotechnical Engineer
Osaimi Engineering Consulting Office, KSA





RE: Coefficient of friction
In the European codes, against rough, cast in situ concrete δ' is equal to φ'cv, that is φ' at constant volume or φ' at the critical state. against smooth, prefab concrete δ' = 2/3 φ'cv, other values are available in the technical literature:
http://www.finesoftware.eu/help/geo5/en/table-of-u...
www.mccoy.it
RE: Coefficient of friction
Jaleel Ur Rehman
Geotechnical Engineer
Osaimi Engineering Consulting Office, KSA
RE: Coefficient of friction
Then, either I'm missing the point, or there is a misunderstanding with the client...
www.mccoy.it
RE: Coefficient of friction
I've always used 2/3 phi for the friction between soil and concrete.
Mike Lambert
RE: Coefficient of friction