Question about soil cement/alternatives

Hey dudes, I'm wanting to harden a dirt car port floor. It's not used as a car port though, so it will only have foot traffic. At the moment it is just a compacted dirt floor. I'm thinking of trying out soil cement, but I have a very heavy clay soil. From what I've read, clay soils aren't ideal. Has anyone had any experience with soil cement with clay soils? Would it work if I just tilled in some sand to get a looser soil? Also, if you guys can think of any alternatives that are more environmentally friendly, I would love to hear them. Like I said, the space is just foot traffic, and wont even see much of that. Thanks

Compacted clay can be very hard. You could try to compact a small section with a hammer and if that woks, maybe use one of these soil compactors used in construction?

I would not bother with additives of any kind.
Find aggregate/ stones/ upto 10mm in size and pour over the ground.
I have used white pebbles about 12mm in size so I can see the ground in the moon light.
You can collect the gravel from the roadside after a new surface has been applied, or evn buy it.
I have had great success with it.

Here are a few tips others have suggested, gravel paths
More paths

You might also try wood ash if you have it. I have never seriously experimented with it but I have heard it works good when compacted into clay to create a very hard surface. The gravel will also help immensely I am sure. Also make sure it doesn't hold or receive any excess water.

My neighbor has a carport filled with what I think is arena sand that she compacted with a plate compactor and it's rock solid.