This does not look like a building site to me!
After pouring a 280m2 slab and letting it pond for a minimum of 7 days, we where advised by firth that our slab was part of the 'plant misshap' that occurred a few weeks ago. The slab was around 15mpa instead of 30mpa, essentially it was sandstone instead of concrete. They started to rip up the slab on monday after doing 740m of saw cuts through it! Always a fun day over seeing the building site! (they dont teach you these things at arch school)