There is an approach called "continuous pour" that iiuc is all about
making sure the previous batch and the next batch get confused and
think they are part of the same piece of concrete. Let me poke the web
and see what it says... iirc St. Louis arch, CN Tower... that sort of
thing, benefit from this tech.
Right, that bit of research didn't help. And my books are all packed
up right now. Maybe somebody else can add real info. Talking about
moving/crawling/walking forms might be interesting too, hint hint.