Salt stains on concrete paving (courtyard and paths) do not go away

Normal concrete paving should actually not be so susceptible. Salt still isn’t good for it of course. Have you already tried scrubbing with a brush?

yes, but so far only by hand with a scrubbing brush and a simple brush, but I gave up quickly when I realized nothing would work. I might try now with a brass wire wheel as an attachment on a drill....