Barry:

Since I wrote and maintain my site, I probably know what's on there intimately. The question was not so much about the usual maintenance required on such a foundation. There are reams of info out there on the subject. I have committed most of it to memory.

And I am fully aware that the longer the slab sits, the harder it gets. Weathering of concrete is not an issue. This is completely different in that there is no house constructed on the slab. My concern lies in the lack of weighting the slab over a long period of time. What effect will that have?

JP addressed this, but I was hoping one of the engineers might hop right on in there with some wisdom . . .

Aaron