The Shop > Metal Stuff
Problems with the sand mix?
awemawson:
How are you doing your mixing?
The idea is that each grain of sand has a very light coating of binder (clay) with the whole body being uniform in texture - I'm a bit concerned to hear one area was 'very rich with clay' as that implies it's not mixed well enough.
Not always possible, but if making your own sand mix (rather than buying Mansfield Sand for instance which already has clay in it), then start with dry sand and dry powdered binder - bentonite clay for instance - and mechanically mix it (cement mixer or a paint stirrer if on a small scale) .
Only add the water to temper it when it is already well mixed
shipto:
by hand but I will get it mixed just need to keep at it. Not possible to mix it dry now unless I waste the big bucket I have made up.
chipenter:
This is what you want http://www.screwfix.com/p/power-paint-mixer/61617 .
awemawson:
Yes, that's identical to the paint stirrer I used to use for small mixes :thumbup:
mattinker:
--- Quote from: shipto on March 09, 2016, 05:44:27 PM ---by hand but I will get it mixed just need to keep at it. Not possible to mix it dry now unless I waste the big bucket I have made up.
--- End quote ---
You don't have to waste your big bucket full to mix dry, spread the mixture out on news paper, as thinly as you can, crush when dry (anything will do to crush, a hammer, a piece of wood) and remix with a mechanical stirrer or by hand when dry. Use a mask when mixing dry sand, watch out for dust!
Regards, Matthew
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