I would recommend an expansive waterstop and dowels (if there is adequate
thickness). The bentonite type could be used or there are also water
reactive chemical type expansive waterstops, such as Hydrotite by
Greenstreak. Also, there is a non-expansive adhesive type waterstop called
> -----Original Message-----
> From: Ed Fasula [mailto:tibbits2(--nospam--at)metro.lakes.com]
> Sent: Wednesday, January 26, 2000 9:12 AM
> To: seaint(--nospam--at)seaint.org
> Subject: Reinforced Concrete Tank Seal @ Exist.
> We have to add on to an existing concrete manure pit. The
> local code allows
> some leakage, but personally and professionally I'd like to avoid any
> significant leakage at all.
> Common practice seems to be to cut a notch into the existing
> wall and create
> a construction joint. I would think doweling would be
> required as well.
> There is a bentonite based sealant, RX, that is sometimes
> used. It's not
> recommended where the bentonite can, and apparently has,
> actually swelled
> with enough force to crack the concrete.
> Any ideas about other directions would be appreciated.
> Ed Fasula, EIT