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uses for Granite dust

 
gardener
Posts: 3054
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I have a waste stream of ruffly one to two 4ftx4ftx4ft bags of granite dust a week. It's bagged and placed on a pallet.

It's slippery when wet (like clay). It settles to the bottom fast (heavy). It's fine like flour.

I'm curious if this could be a substitute for clay in building a dam.

I guess the answer would be to punch some holes in the bottom of a bucket, add the dust, then water. Then see if the bucket leaks. I also have a waste of of granite rocks which could be mixed in as a binder.

If not this, than other uses? Earth bags or sand bags? Place these as is and have 4 ft thick walls (lol).

an additive in concrete?



 
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Biodynamics uses rock dusts or powders as beneficial mineral supplements for plants. There is evidence that it is healthful and useful.
John S
PDX OR
 
pollinator
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Wayne Fajkus :If I had access to a few lbs I Would see if its fine texture would help reduce the expansion and contraction rates in a
few different Clay and Sand mixtures that I use for making Cob !

Many if not most potters know about various materials that refuse the changes with firing and cooling fine pottery, these materials
are called Grog! The Bone in Bone China (literally in the china) is A Major reason it can be made so thin !

If you know any potters offer to share your stream as a potential ''Grog "! For the good of the crafts !Big AL
 
pollinator
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Elliot Coleman also recommends granite powder for mineral content in his book The New Organic Grower.
 
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I use it as a source of microelements in compost.
 
wayne fajkus
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After the first mention of it as a soil additive, I Googled it and it circled back to a thread here from a few years ago.

I'll do the bucket test with water. This will be a means to use literally tons of it (which i have)if it could be a dam builder/pond sealer.
 
allen lumley
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wayne fajkus : If I have understood correctly, the 4x4x4 Bags are considered part of the waste stream(?), then you have ready-made Gabions.
The Plastic bits potentially exposed to uv rays from the sun must be painted ! Alternately you could add soil pockets and plant a grape or ivy !

I expect that your Granite flour could be used as a way to stretch how far a batch of clay would go, so build your dam out of stacked and bagged
gabions using loose bags to provide a taper to your walls, and then clay and then then granite dust can be used to reduce the muck factor on
the bottom of your pond ! Good luck, send us pictures ! Big AL
 
wayne fajkus
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That makes sense allen. Thanks. Maybe dig the topsoil out so these are sitting on the clay pan. Then put that dirt on both sides to cover the plastic bag.

Not sure I can place these individually though. My tractor can't handle the weight. I can empty them into a dump trailer, then dump at dam location. If it doesn't work I can use a tractor to spread it around on the acreage. No downside.
 
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Location: Victoria British Columbia-Canada
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I've spent 16 hours on a 70 lb jackhammer in the last two days. Tired, but no sore joints. A ridge of salt and pepper granite 8 inches below grade blocked the route for the new sewer line. My customer is sneaking a little apartment into a garage. It's beautiful black soil and all was well until 8 feet from the spot where it joins the exit. No official visitors so far. My story is that the garage roof is flooding the lawn and the trench is for that. Fingers crossed.

After reading this, I plan to use the granite dust in the garden. The waste is about 20% dust. The bedrock added $1000 to a dig that would have cost only $200 in nice soil.
 
Dale Hodgins
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On the question of whether the material will hold water - no. My place is about 80% rock flour which is somewhat equivalent to your supply. A neighbor built a pond with decent inflow but it drains out quickly in the spring.
 
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