Re: [OM] IMG: Repair of WWII Concrete

[Chuck Norcutt]

You got it. Spiral fins. 
<https://www.google.com/imgres?imgurl=https://upload.wikimedia.org/wikipedia/commons/1/1c/Operation_of_a_truck_mixer.gif&imgrefurl=https://en.wikipedia.org/wiki/Concrete_mixer&h=586&w=910&tbnid=cslzR-0U58gKUM:&docid=ez5-G50jvcokzM&ei=VZjHVt2GJMjDmwHd7quoAw&tbm=isch&ved=0ahUKEwidhcCh8YTLAhXI4SYKHV33CjUQMwgdKAAwAA>
Chuck Norcutt


On 2/19/2016 3:40 PM, Moose wrote:
> On 2/19/2016 12:33 PM, Jim Nichols wrote:
> > My question is, "How do they propell the concrete from the
> > container?"  I have never seen one tilted, but have not really watched
> > the pouring process.  I have found no explanation online. Perhaps
> > there is a scraper system inside the drum?
> I'm gonna guess, 'cause sometimes that's more fun, a blast from the
> past, than WikiWhatever.
>
> First, it's no different than the rear unloading designs, where the
> outlet is also at the high end.
>
> Then, there are agitator 'fins' inside to keep the cement from setting,
> the whole reason for the complex, rotating design. The fins are are
> designed/shaped so that reversing the rotation lifts the contents up to
> the 'spout'
>
> That's how I would do it, anyway. ;-)
>
> Speculative Designer Moose
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