Board Thread:The B&B/@comment-4820455-20170317223502/@comment-5782071-20170318032649

Not exactly, at least as far as reading Wikipedia tells me. He invented what's known as "Shotcrete ", which is just concrete or mortar "conveyed through a hose and pneumatically projected at high velocity onto a surface, as a construction technique." He didn't invent concrete, just a method of using concrete.