Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Active Pressure Coefficient of...

[Subject Prev][Subject Next][Thread Prev][Thread Next]
That was my thought as well, although the graphic image of gas bubble percolating though such a mass is not exactly a welcome thought at lunch time ;-)

I can say, from experience, that the coefficient of friction of wet chicken manure is perilously close to 0.  In fact, I'd be tempted to say that said manure, deposited in a thin, approximately uniform layer on a subtrate of M & C soil, sufficiently dampened by a prolonged drizzle, may indeed have a negative mu_s.  But that was a long time ago.

bcainse(--nospam--at) wrote:
Although I'm sure the material in question is quite "active", due to the "activity" involved in the composting process, the at rest pressures or fluid pressures similar to the unit weight of the material would probably be more nearly what you would see on an unrestrained wall.  Picture gas bubbles causing expansion and readjustment of the material as they form and dissipate.
Bill Cain, S.E.
Berkeley CA
******* ****** ******* ******** ******* ******* ******* *** * Read list FAQ at: * * This email was sent to you via Structural Engineers * Association of Southern California (SEAOSC) server. To * subscribe (no fee) or UnSubscribe, please go to: * * * * Questions to seaint-ad(--nospam--at) Remember, any email you * send to the list is public domain and may be re-posted * without your permission. Make sure you visit our web * site at: ******* ****** ****** ****** ******* ****** ****** ********