Thread: Epoxy granite or mineral casting
My original question was to ascertain if anyone had done this granite thing in the UK
It seems getting on to a company that can answer the questions as they manufacture the machine bases cleared all this up nicely
To answer your question ..Yes!
This was for platorms at low level height in clean rooms for machinery to sit on. One thing we added was loose fibreglass to the granite resin mix. As far as a workable idea? the answer is yes and a good one.If the nagging gets really bad......Get a bigger shed:naughty:
You may want to have a chat with these guys they make an entire lathe out of concrete, not just the footings or the base and they do attach the linear rails straight to the concrete. Aparrently they were used all the time in WWII (along with concrete ships) because all the metal was going into things that kill people.
MAKE | The Concrete Lathe Project
Many years ago, long before the internet, and when I lived in warmer climes, I had the whacky idea of building an outdoors pool table out of concrete instead of slate but it ended up on the round tuit list.
Now this thread's got me thinking about the idea again....
INterestingly I was musing on the idea of a reinforced concrete z-axis support to replace the round column on my mill... one day in the distant future
By way of experiement I did the FEA on a 100x 100mm 5mm wall steel tube and a 100mm x 100mm concrete post, both 750mm high.
Ignoring any difficulties fixing the concrete post, the torsional stiffness wasnt so different. With an applied 200Nm twisting load 500mm out from the centre of the post :
Steel 0.34mm movement. Weight of column 34kg
Concrete 0.45mm movement, Weight 19kg. (thats with no reinforcement inside)
So with some refinement it certainly looks doable...
If you want to talk to folks who work in some of the truly interesting end of Cement and ferrocement then you might want to look here Ferrocement Educational Network As they have been doing work with mesh re-enforced cement and other strangeness that makes some very interesting reading.
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