Reading your link, it seems that the cement factory land was always zoned industrial, and was intended to be used for industrial purposes after the Olympics.
Re:Post-Olympic Abandonment
by somewhatoff on Thursday February 23, 2017 @02:32PM
(#13716939)
The Olympic park in London is bringing lots of new facilities - an innovation park, a university campus, a theatre etc and thousands of new homes.
London is an exception to olympic abandonment to my mind - it's doing a lot of the success of east London on what was previously polluted industrial land.
Part of it is on the verge of being converted into a cement factory (https://www.theguardian.com/uk-news/2016/aug/11/olympic-park...)
Honestly believe a world without the Olympic games is a better world, if London can't find much use for them and Rio is already letting them fall into disrepair. What on earth is the point in this.