|
clay wetting/drying
Paul, I think you are optimistic about the ob increasing clay stability. I think lateral water flow is quite substantial. My situation is on deep clay.
My pier sits on somewhat more than 1 cubic metre of concrete and the ob on a 3 metre by 3 meter by 100mm slab with plenty of reo. The pier has a 25 mm gap between it and the slab.
Four observations about this set up.
1) When it used to rain here moisture came up the gap and flowed out drainage slots cast in the floor, not much but just detectable.
.
2) due to the above I had to place interlocking plastic grating beneath the foam tiles on the floor
3) The slab and the pier move differently
4) the pier moves by a couple of seconds over a couple of months and I use Sharp Cap to re-align the mount. After a few years the floor had developed a noticeable
slope.
Chris
|