Make these holes 12 inches on center horizontally or vertically depending upon the predominant orientation of the joint.
Tying concrete walls together.
Use rebar about 1 3 in 0 85 cm in diameter to reinforce the concrete.
This tie is used mostly on floor slabs.
Drill 5 8 inch diameter holes six inches deep into the old concrete.
Insert the tip of the epoxy gun into the hole as far as you can.
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This will provide lateral support to the wall but will allow some minor vertical movement without cracking.
If the joint is taller than wide place the holes vertically.
Place a layer of steel rebar of the way up the hole.
Pull the tip of the gun out of the hole as it fills.
Lay the rebar in a grid with the bars spaced about 12 in 30 cm apart.
If the joint is wider than it is tall place the holes horizontally.
This tie is made by going about 1 1 2 times around the vertical bar then diagonally around the intersection twisting the two ends together until the connection is tight but without breaking the tie wire then cutting off the excess.
If you need to cut the rebar to size with a metal cutting hacksaw blade or another saw.
The wall tie is used on light vertical mats of steel.
Fill the hole with epoxy slowly.
Then pack the cores with mortar around the angle and seal the joint between the new blocks and the old wall with a good elastomeric caulk.