EDIT #2 - Reading the blurry text on one scanned page of the article I have, this author didn't scratchbuild it.
He kitbashed it from an IHC/Revell kit. His was in HO. I had to scratchbuild mine.
Something virtually identical to that Faller kit was covered as a Model Railroader article as
"Raia" Cement, with full explanation
of its operation and information on how to kitbash an IHC/Revell HO kit. I followed that article and built my own from it.
The lead paragraph describes this as a "concrete batch plant".
Here's the MR lead page for the article. Sorry. I can't see what year/month it was.
I took some artistic license with mine.
It's all scratch from styrene. It's not too hard to build. One big tip is that those large towers with
the pointed bottoms are made from 1" diameter hollow plastic knitting needles that you can buy at
places like Michael's Crafts or Joanne Fabrics.
The cement trucks are old Magnuson and GHQ metal kits. The Magnuson ones are hard to come by these days.
The smaller yellow plastic ones are from some cheap blister pack (I think Bachmann, or maybe Model Power).
With some repainting, and snapping off the wheels and moving them so the trucks at least sit level, they don't
look too bad.
The sand and gravel are shown in those large wedge-shaped bins
in the MR article. I wanted to be bringing that material in by railroad somehow, so I
put a stand-alone crane. The idea is that hoppers dump their load onto small conveyors (shown at left more in the background),
which dump the material into piles. The crane then loads that material into the long covered conveyor
you see, which brings it to the plant. This gives you an excuse to run covered hoppers in for the cement (like the
MR article does), and other hoppers for stone or sand.
Oh! (EDIT) Almost forgot. I think in the old article, they explain that the covered hoppers unloaded the cement with a blower.
The way the article describes the towers, there are pipes that lead right down to where the coverer hoppers unload.
I didn't think they dumped their material anywhere.
Some of it ain't prototypical, and sure, unloading using small portable conveyors into piles probably isn't
completely sensible or the best way for them to do it. But it makes for a nice busy scene with bull dozers and loaders, so
I decided to not be a nitpicker and just enjoy it.