You want the concrete surface in each hole to be perfectly.
Patching hole around conduit in concrete wall.
Spray the surface and inside edge of the cinder block hole with enough water to dampen the block but not so much that the water runs down the wall.
Knock away the cracked and crumbling concrete around the hole.
The guys at home depot had a lot of fun lamenting the fact that the hole existed to begin with and then suggested that i build a mold on one side of the wall and fill it in with a pour of concrete.
The standard method of prelocating a hole in a poured concrete wall is to position a sleeve where the hole is needed.
Use a hammer and chisel to remove loose concrete from the hole.
Both procedures follow the local codes for poured concrete walls in my location.
I considered a lot of options.
4 scoop up about cup of prepared mortar mix.
After hearing that i seriously considered just gluing a piece of plywood over it and calling it a day.
Pack the material in tightly and make sure the cement connects with both the pipe and surrounding wall.
Also try to flatten out the bottom of the hole to create a stable level surface for the new patching material.