Repairing concrete walls and footings 2

[milkshakelake]

Parts of concrete walls and footings were chipped away to expose and measure two faces of rebar. The walls are 12" thick and footings are 16" thick. The holes are about 2'x1'. All f'c=4000 psi design strength. How would a contractor fill these in? They are all structural walls carrying 4 stories, lateral seismic/wind forces, and lateral pressure from soil. There are also some 8" CMU structural and non-structural walls where holes were made but I'm not too concerned about those.

I was thinking of packing the holes with 6000 psi non-shrink grout. I figured that since the surfaces are rough, the grout will bond well. My online research turned up repairs on driveways and spalling, which is not the case here since the items affected are structural and load bearing.

How does one repair these walls and footings?

 

[Tomfh]

A method I use sometimes for personal projects (Eg my swimming pool repair at present) is to coat everything with epoxy, wait until it’s tacky, and then use regular concrete, formed similar to ingenuity’s form work. (My formwork doesn’t look quite a nice as his though, lol.)

Hand applied or troweled specialty mortars are pretty good too.

As noted you want to expose behind the bars so your new concrete or mortar can squeeze in and encase them.