Crushing sand - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 07-18-2011, 02:25 AM Thread Starter
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Crushing sand

Does anyone know of a more efficient way to pulverize sand than using a mortar and pestle (or cast iron pan + hammer)?

I'm trying to think up a way to crush maybe a gallon or so of either sand or clay substrate to mix with epoxy for making a foam rock background for a new project. I don't want to spend hours cramping up my hands in the process.

I've considered building a set of powered steel or stone rollers, but that seems a bit labor intensive for what may well be a one time use.
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post #2 of 13 (permalink) Old 07-18-2011, 02:28 PM
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I wonder if you could buy a couple of bags of the finest sand you have readily available and run a hose through it. Collect that water, let it settle, and dry out the stuff at the bottom and you've got tiny sand particles.

I can think of lots of ways to do it, but none of them would be economical compared to just beating the snot out of a bunch of sand. Don't suppose you have a rock tumbler?
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post #3 of 13 (permalink) Old 07-18-2011, 08:03 PM
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Or sift it. Wouldn't need to dry it out again either. Sneak a wire colander out of the kitchen or if there is a flour sifter in the kitchen that might have a finer screen. If that isn't fine enough use a coarsely woven cloth.
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post #4 of 13 (permalink) Old 07-18-2011, 08:18 PM
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drive your car/truck over it a bunch of times.
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post #5 of 13 (permalink) Old 07-18-2011, 08:27 PM
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Quote:
Originally Posted by Sharkfood View Post
I'm trying to think up a way to crush maybe a gallon or so of either sand or clay substrate to mix with epoxy for making a foam rock background for a new project.
I don't want to hijack your thread, but I'd like to understand: what would the advantage of this over just using un-crushed sand be?
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post #6 of 13 (permalink) Old 07-18-2011, 11:11 PM
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Quote:
Originally Posted by Sharkfood View Post
Does anyone know of a more efficient way to pulverize sand than using a mortar and pestle (or cast iron pan + hammer)?

I'm trying to think up a way to crush maybe a gallon or so of either sand or clay substrate to mix with epoxy for making a foam rock background for a new project. I don't want to spend hours cramping up my hands in the process.

I've considered building a set of powered steel or stone rollers, but that seems a bit labor intensive for what may well be a one time use.
Go to a welding store or Agri Supply and buy a bag of super fine Sand blasting sand...


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post #7 of 13 (permalink) Old 07-18-2011, 11:22 PM
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Go to a welding store or Agri Supply and buy a bag of super fine Sand blasting sand...
that stuff usually has sharp edges and is not recomended for any bottom dwellers.
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post #8 of 13 (permalink) Old 07-18-2011, 11:41 PM
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that stuff usually has sharp edges and is not recomended for any bottom dwellers.
He's using it as a 3D back ground as a finish, if i had to guess. Not as a substrate.


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post #9 of 13 (permalink) Old 07-19-2011, 03:41 AM Thread Starter
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Quote:
He's using it as a 3D back ground as a finish, if i had to guess. Not as a substrate
Correct.

You add it to the final layer of epoxy, or spread it over the wet surface to make a more realistic appearance. Epoxy dries to a gloss normally.

I haven't tried full sized sand grains, but imagine it would look a little too "beachy" for my plans.

The sifting ideas would work, but I would end up with a lot of sand that was too big to use.

I could use my truck also, but that would spread the sand all over the parking lot.
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post #10 of 13 (permalink) Old 07-19-2011, 03:50 AM
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Ah, it's an appearance thing, then. Gotcha.

Thank you for 'splainin'
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post #11 of 13 (permalink) Old 07-19-2011, 04:44 AM
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I found that Home Depot play sand has a lot of very fine particles in it. You could probably sift out more than enough for your project with just a few hand fulls of it. Then you would still have a bag of sand for other uses.

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post #12 of 13 (permalink) Old 07-20-2011, 03:25 AM
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Purchase a used blender from a thrift shop or a cheap new one. You're going to be ruining the blade and the motor so don't spend too much. It should last long enough to give you the quantity dust you need. Please post pictures when you're finished.
post #13 of 13 (permalink) Old 07-27-2011, 06:13 PM
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Pool filter sand comes in various sizes. Have you checked that out?

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Sam
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