I am in need of some free concrete advice.

I just finished laying a thin layer of portland cement on the floor of our mushroom house. I was so sick of little bits of mushroom and straw falling into the gravel and getting lost I just went ahead and started pouring.

This was an extremely amateur job, and I don't really care if it cracks a little bit. As long as it is easier to sweep and wash than gravel, which it will be as long as it doesn't crack up so much it turns to gravel.

So what I did was just pour the cement on top of our already well packed gravel and smooth it out as best I could, that is to say not very smooth. No re-bar, no wire mesh, just cement on gravel.

So what problems can I expect now? What kind of life-span will a shitty job like this have?