Subject: RE: Circular Concrete Tanks without Prestressing
From: "Sprague, Harold O." <SpragueHO(--nospam--at)bv.com>
Date: Tue, 1 Feb 2000 12:10:53 -0600
Will-Seal 200 is imported and generally not stocked, but it is
designed to resist a head of water.
Could you route the joint to accommodate it?
Consider the Sikadur Combiflex if the joint is active or SikaSwell S
if the joint is not active or the SikaFix HH for the expanding polyurethane
I have not had much experience with the Hydrotite, but I have had
the same reservations as you have with the swelling materials.
One joint that I did about 5 years ago used:
1. A routed joint which also served as a shelf for the
2. Will-Seal 200, which I used as a backer rod
3. Sika 2 part polyurethane sealant.
It has never had a leak problem since.
> -----Original Message-----
> From: Sherman, William [SMTP:ShermanWC(--nospam--at)cdm.com]
> Sent: Tuesday, February 01, 2000 10:52 AM
> To: 'seaint(--nospam--at)seaint.org'
> Subject: RE: Circular Concrete Tanks without Prestressing
> Harold, thanks for your input. You mentioned the following products:
> > There are adhered expansion joints like the Jeanie and Will
> > Seal...
> I have a relatively old catalog for Will-Seal by Illbruck, Inc. It
> to be intended mainly for above grade sealing and the specs say to test it
> only for 2-inches of water. Has it since been tested for higher heads
> full hydrostatic head?
> We have used the Jeene joint sealing system on wider joints, but the
> smallest joint it is made for is 3/4-inch. I am currently trying to seal
> 1/2-inch joints.
> > Another solution that would seal smaller cracks is injecting
> > Sikafix. This product expands upon contact with water and remains
> > resilient.
> Sikafix is a polyurethane grout, which is similar to the chemical grout
> injected into such joint sealing systems as the "Injecto Tube" by DeNeef.
> This system is primarily intended to be used in construction joints - a
> permeable tube is cast into the construction joint and chemical grout is
> injected into the joint after it has been constructed, filling the tube
> any voids with water reactive grout. I have used this system in expansion
> joints before - sometimes with success but a recent project has run into
> leakage problems with this system in an existing expansion joint. I'm not
> sure if it is a "system failure" or an installation problem. So far this
> the best solution I have found, but I am still searching for other
> I am currently looking into a similar detail using Greenstreak Hydrotite
> expansive "rope". A circular rope of water reactive material could be
> precompressed like a backer rod and inserted into the joint. Again, the
> material is primarily intended for construction joints, but I've heard
> it may have been used in an expansion joint at one project - I am still
> trying to get more data on that.
> These expansive grouts also have differing properties. The injection
> must be wetted at installation and expands to form a closed cell
> polyurethane foam which remains permanently expanded. The expansive rope
> expands and contracts with wetting and drying cycles and takes some time
> react (i.e., could leak initially until becomes fully reacted). Currently
> prefer the injection grout which is intended to expand and form a
> compression seal as well as have bonding and elongation capabilities.