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Epoxy Injection in CMU

Epoxy Injection in CMU

Epoxy Injection in CMU

(OP)
Is coring/testing necessary or advisable for a solid grouted 12" CMU wall.  The crack is approximately 1/8" wide and 15' long.

Thanks, Dave

RE: Epoxy Injection in CMU

Do you know what caused the crack?  What would you learn from coring?  Was the reinforcement inspected?

BA

RE: Epoxy Injection in CMU

(OP)
the crack was caused by a deteriorated sewer line, the foundations were wet and the corner of the building settled.  I put crack monitors on and watched it for a year.  The movement has stopped once the sewer line was fixed and the soils dried out.  The soils were drilled on both sides of the wall and found to be fine a couple feet down.

The core would be used to determine if the epoxy bonded to the CMU and grout.  If it broke at the epoxy/crack repair, no good.  I found a spec on the SEAINT website, which discusses coring but says it may be waived in some situations, but I'm not sure which situations...

RE: Epoxy Injection in CMU

I think, given your information, that it depends on the importance, do you need to transfer stress through the repaired crack or is the repair for appearance only. If, as I imagine, the surfaces inside the crack are rough, there should be some mechanical interlock even if there is a lack of bond.

Michael.
Timing has a lot to do with the outcome of a rain dance.

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