Angle of repose

keep on pouring the material on a flat surface till a good measurable conical shape or hip is formed; then measure the ange with respect to the falt surface;

you will notice that no matter how much material u keep on pouring the cone angle will remain same; u will only observe the increase in dia of the base.

aditya

Also, it will vary with the type size of the material.

Regards;

Nadeem Butt

10192007

can you explain its formula and what is the standard in BS for the calculation and test procedure,

Buy a pocket ref like, say, those published by Sequoia Publishing in Littleton, Colo. They're cheap, widely available...lots of look-up information useful for many trades. Check the Material Dumping Angles section in the Mine, Mills, & Aggregates section for the reference--and formulas--you need.

A more general response: the angle of repose is determined by the height of the pile and the diameter of the base of the pile, from which the angle can be calculated...or the formula is also in the handbook.

I do not believe it is possible to accurately estimate an angle of repose. This property of crushed solid materials is a function of many parameters including particle size, particle size distrubution, moisture content, static charge, etc. and must be measured for any given set of circumstances.

I think that is what everyone is trying to figure out: is he trying to "guesstimate" and actual dump or dump to be (in which case he would best rely on tables to find the data for "his" dump material); or does he simply need to know the definition (the derivation) of angle of repose (in which case simple measurements, or measurement estimations, or algebraic variables would be all that is needed, along with a bit of trig calculation.

But it is true, that in the real world an angle of repose is to some degree nominal at best.

It's something done by observation. Pour the material into a heap and measure it.