Missing calcium sand-lime brick - substrate tiles

Ok, I solved it. Removed as much expanding foam as possible on the left and right, drilled holes in the sand-lime brick, cut two pieces of stainless steel threaded rods size 8, and anchored them in the holes in the sand-lime brick with fixing cement. Then built a kind of reinforced concrete for the little guy around the threaded rods with a very cement-rich mortar, and plastered over it once with cement mortar. Removed the remaining gypsum plaster and glued a [Wediplatte] onto the resulting surface.

… reinforced concrete of the little man …

Very nice, I had to laugh!