concrete tank

[mcandace]

I have a leaking finished water tank. The concrete tank is leaking around a piece of timber blocking that the contractor must have lost in the form. We X-ray'd the wall to see if we could detect how deep the block went. It appears to be no more than 1" square. However the 12"+ thick wall is seeping through the area. Assuming that the timber is more subject to cracking the wall during freeze thaw cycle, we want to remove it. This will leave a decent penetration in the wall and is highly likely to stay damp because of cracking.

What is the best option for filling and patching concrete?

 

[TRAK.Structural]

Probably need to install a retrofit waterstop and fill with non-shrink grout. I would require the contractor not cut any of the existing embedded reinforcing when doing the demolition.