IanO
Superstar
Zero tolerance needs to be applied to all public parks and spaces, especially since this will have a W/C and in the new Warehouse O'Day min Park.
Aerated mix with a post-pour chemical percolation lets water seep through. It seems to be gaining popularity as a replacement for various mulches that can be abused by the public.
My concern is that it wouldn't take much for friction between the bark and the concrete to cause enough damage to "ring" that tree trunk and kill the tree. At a minimum, I would have thought a half or even a quarter inch of expansion joint material like that used around fire hydrants when they're installed correctly in sidewalks would have been used here around the tree trunk and the concrete poured to that.^ No, permeable concrete has no structural oomph (technical term)... it will crumble away as the tree trunk expands. Quite true about not standing up to freeze-thaw cycles; but, in this case, the break-up of freeze thaw will just make it more permeable. It will be interesting to see if it breaks up in big chunks or ends up more like gravel (preferred).




