This is a hard thing to explain
We are building patios at out house
this picture is the one at the front entry
we used paver's ,and we were going to use the concrete walkway molds to fill in where the stone dust now is, but due to lack of time and money we filled it with stone dust
I used a tamper to pack it tight
But what I want to know is can we mix like concrete mortar mix or something like it with a top layer of stone dust to make it harder?
My Great Dane walks on it and makes a mess
I know it will get harder later but I don't want to be sweeping and raking every day
Also it is very thick in this area
So it stays better than in the next 2 pictures I will show you
Mixing cement with a thin top layer and spreading it dry would keep the dust down and stabilize it a lot, but it would be very weak and probably break under use before long. It would be tough to do the concrete forms a few at a time in such a large area, but that may be an out. Darius might have an answer, she's a sharp cookie.
First, I'd try soaking the stone dust and tamping it well with a water-filled roller like they use for tamping lawns and flooring. It make several times doing this to get the dust to start to harden. Breathing the dust can be hazardous.
I always made sure my mother got gravel with the stone dust still in the mix for her road repairs. Hardened well after a few rains and driving on it, and lasted longer.
You could also impregnate the stone dust with an exterior epoxy.
That might not be thick enough. Go talk to the top guru in the paint dept. at Lowe's of HD. You might have to mix a gallon and apply it in a thick layer like 2"-3". I just have seen lots of walkways in south FL with pea gravel done in epoxy like that. Still leaves a textured non-slip) surface but binds all the gravel.
The Sunset magazine popular here in the west, did an article on making paths. Their system poured dry concrete mix up to four inches thick. Stone dust was spread on top of the dry mix and smoothed out. Water was then sprinkled several times and the concrete mix set up hard with the stone dust as a surface. If you did a google search on Sunset Magazine you could probably find the article. I did a test patch about a week ago and it seems to working OK. Al