Used slurry uses ?

My only experience is to pour the used slurry into the cracks and gaps of my house's driveway. They don't condense and don't prevent the weeds from growing out of the cracks.

Google "can you use silicon carbide slury in concrete".   Surprisingly, you will find more information about this than you might think including the article below.  I didn't read deeply but  I suspect most of the information deals with raw silicon carbide and not worn down sic after grinding (plus you would have the rock dust in there).   The slurry is pretty hard when dried so not surprised you can substitute it for sand in a concrete or mortor mix.  It would take some experimentation to get the amount right (might still require some sand) and to be careful that you got a consistant color.   Don't know why it wouldn't work as long as you still add enough cement to the mixture.  


mit.imt.si/izvodi/mit205/malek.pdf

They also made my driveway and the weeds pretty dusty after the slurries dried up. Well I learned my lesson that the cement is not that easily made.

The problem is that the dried slurry is strong enough to clog your drain, but not strong enough to use as mortor by itself.   Since mortor consists of sand, cement, and water, you don't need to get the slurry dry before starting your experiement.  You can use the water in the slurry in place of water that you would add otherwise.   Real question is:  How much water is in your slurry?   Don't know how mathimatically inclinded you are but you could figure this out.   I would decant off as much water as you can until you get something that is all slurry with no or little free water on the top.   Mix your slurry well, then take a known small sample slurry volume (I am thinking something around a cup although you might want to use metric units), weigh it wet, then bake it in an oven until completely dry (I don't recommend your good oven) and determine how much water is in the slurry.  Once you have that it is a good starting point to try your slurry, some sand and cement and water if needed in different proportions and see what works.   Based on recent heat waves, you could put your known "small" volume of slurry out in the sun and let it dry that way in probably a few days.   

Everytime you have new slurry, it is going to be different so it may not turn out like it did the last time.  

I hadn't ever thought about putting it on our gravel driveway.  Where was my head?  We have a very steep portion where the gravel is always washing away.  Next pail is going there.  Hopefully it will be hard enough to hold some of the gravel.  In fact it could go there wet now that we are in the dry months of summer.   

I have a small bucket that I am going to experiment with using as super fine sand blaster grit.

You can use as a binder to make your own soft pastels. Just add pigment. I haven't had time to do this yet.

Be careful. The dust from dried slurry can cause silicosis, something you would not want. When I got into this hobby about a decade ago, in my early reading, I ran into much information about this danger. In other words, rock dust from silicates--quartz in all it's forms, can kill. Wet it's not so much a worry because it doesn't get airborne. So I pour my slurry into cardboard boxes sitting on the floor of the garage small enough to lift. When full and dry I carry them carefully and don't breathe any more than I have to while carrying them and GENTLY put in the trash can to be picked up with my other trash.

This is why some forms of diatomaceous earth have warnings about not breathing the dust from stirring it up.  And this is why it kills ants for instance, because the tiny particles are essentially shards of glass and they scratch the exoskeletons of ants and mess up exoskeleton in various ways.

Asbestos isn't the only inhalable silicate dust that's bad news. I have seen a patient die of silicosis and it's pretty horrendous. He was a monument maker who didn't like wearing his dust mask. More recently, one of the senior workers installing our granite countertops was not wearing respiratory protection in spite of there being a thick cloud of dust in the room. People just need lots more education. A lot of silicates, including many amphiboles, tourmaline, and quartz, are piezoelectric and/or thermoelectric. When their dust particles penetrate into the lung tissue the weak currents they generate when mechanically or thermally stressed could stimulate tissue growth, particularly fibroblasts, and in some cases promote malignancy. Electrical stimulation is used to speed bone fracture healing. Gentle weight bearing stress also speeds healing/remodeling of bone as the hydroxyapatite in the bones is also piezoelectric.
Keep it wet to keep it safe.