My thought exactly. I suspect it's harder to work with or more finicky about the conditions in which it cures. The trend in the past ~50yr for concrete has be

My thought exactly. I suspect it's harder to work with or more finicky about the conditions in which it cures. The trend in the past ~50yr for concrete has been toward stronger concrete at the expense of being more picky about where any when it is poured (gone are the days of pouring whatever into the bottom of a water filled hole on a 33 degree day and expecting a good result) so that would be my knee jerk reaction. Like everything else in the world this will probably take 10+yr to go from academic paper to being actually used in industry (if it pans out).