When RGL were approached by the joint venture of BAM Nuttall and Kier (BNK) in August 2012, they needed our assistance with the selective removal of concrete in the top 1 metre of the diaphragm wall on one of their Crossrail sites in London. This tricky concrete Hydrodemolition task would remove cement and aggregate and leave steel reinforcements intact, ready to be integrated to a capping beam.