I noticed them laying electrical conduit a couple days ago but wasn't around yesterday to see if there was a concrete pour for level 57. Here are some pictures from today:
From today. They poured the corners lower down, completed installing the next level floor forms and they raised the blue forms at the top. Some workers still at it at 8:30pm.
From today. You can see the smaller opening just above the larger opening at the centre core. That's most likely for the ducting in the mechanical room.