Hochtief-Murphy completes record cement-free concrete pour

National Grid claims its contractor Hochtief-Murphy Joint Venture (HMJV) has completed the world’s largest ever continuous pour of cement-free concrete on the £1bn London Power Tunnels project to rewire London.
HMJV has overseen pouring of 736,000 litres – enough to fill around two 25m swimming pools – to fill the base of the 55m deep tunnel drive shaft at National Grid’s Hurst Substation in South London.
The cement free solution was developed by Wagners and supplie