Broke the concrete in my basement to run new pipes for the basement bathroom. The plumber put sand under the pipes to support them at the correct angle. I asked him not to glue the vertical sections as I'd probably have to disassemble them to build the wall there.
My question is now... What type of cement do I use to fill it back in? Should I hammer drill into the sides of the cutout and put a few pieces of rebar in? Can I just fill it up with sand and level it?
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