I'm no expert on concrete, but the first graph on this page indicates that even with two days of curing, shotcrete is quite strong: http://civil-online2010.blo

I'm no expert on concrete, but the first graph on this page indicates that even with two days of curing, shotcrete is quite strong: http://civil-online2010.blogspot.com/2010/09/shotcrete.html http://civil-online2010.blogspot.com/2010/09/shotcrete.html