GonzoRacer wrote:
One thing that I didn't make plain, I now realize, is that TRX says that the slab is not cracked and is in position.
It *does* have a crack, lengthwise, in the middle right across the edge of the solid roadbed. But that crack happened just a few years after it was poured, before I built the shop on it.
I don't really know if it has tilted or not; they said they would slope the slab to drain out the doors if it got wet, and I do have enough slope to make it annoying to level machinery, but it hasn't increased any; I leveled the old mill in 1994, and it was still level last year when I got rid of it.
So I'm not really sure if the crack is relevant... it's concrete, I figured concrete just does that.
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The pumping I'm talking about would fill the void under the solid slab. It would not lift/move the slab. That would require a LOT of pressure, as in using a motorized pump and sealed fittings in the holes.
The tilt, if any, is in the "can live with it" range. I just don't want it to break off and fall into the void...
I don't get around so good, so I'm going to pay someone to fix it if I can afford to. Otherwise, when you get a free moment could you look up that pump for me? West Marine has a buttload of pumps.
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Donnafill
As I remember it looked like gray flour and it made little puffs when people walked through it. With my luck it all washed away...