Coefficient of Friction - Concrete Block on Gravel
Coefficient of Friction - Concrete Block on Gravel
(OP)
I am looking for reliable numbers for the coefficient of friction between a precast concrete block and gravel, and or soil. This is to provide lateral shear resistance in temporary construction activities. I found some references for cast in place foundations, but the "deadman" counterweight is precast, not cast over the roughened surface. I think of this as a polished concrete block, sitting on a rough surface, just a little bit better than sitting on ball bearings. I need positive anchorage, but I am restricted from penetrating the grade, do to unknowns.
Can anyone help?
Thanks so much in advanced.
Can anyone help?
Thanks so much in advanced.





RE: Coefficient of Friction - Concrete Block on Gravel
RE: Coefficient of Friction - Concrete Block on Gravel
I've always treated that with a little skepticism due to the potential ball bearing effect -- either requiring a thick pad of well graded gravel with some photo evidence, or discounting the factor a little. But I have used it with those caveats with success in the past.
RE: Coefficient of Friction - Concrete Block on Gravel
Appreciate the help.
Sincerely and regards,
Barry D. Jackson, P.E.