This is a different building site in Taiwan; there is some suggestion that the collapse of the building (during an earthquake) might have bee due in part to the use of CANS as filler material.
('cause cement is expensive!)

Sorry - an ‘n’ disappeared...
A couple of years ago, I saw a photo of a bridge on the mainland where they found that under the concrete skin was a bunch of paper and cardboard refuse.
That s*** is ALLOWED there!!! I was reading something on their concrete specs a while back and there was X amount of crap and debris you could have in freakin’ COLUMNS!