Aggregate Transforms Liverpool Street Redevelopment


Lytag Aggregate Industries will be transforming the London skyline with the £250 million redevelopment of 100 Liverpool Street. The high-profile redevelopment is part of the wider Broadgate campus adjacent to Liverpool Street station and it involves demolishing 50% of the original building and rebuilding new infills in structural steel with the addition of three new floors to a create modern, mixed-use space.

A key requirement for the main contractor, Sir Robert McAlpine, was to source a concrete solution which would enable more floors to be cast without compromising the dead load of the overall structure. The obvious choice, then, was to use Lytag from Aggregate Industries’ highly innovative lightweight aggregate solution, which can effectively reduce the composite deck concrete slab load by approximately 25% over normal weight control while offering the same level structural performance – enabling 100 Liverpool Street to – literally — reach new heights.

In addition, Lytag is made from secondary aggregates; therefore offering a much more environmentally friendly alternative to standard concrete. Thanks to its unique properties, it can help to significantly reduce the amount of material required on a project, along with the associated carbon emission produced in delivery.

“The redevelopment of 100 Liverpool Street is a major milestone in Broadgate’s evolution into a world-class, mixed-use destination for London. This project wouldn’t have been structurally or architecturally possible without Lytag and its unrivaled capabilities. Not only did it enable us to take the project from conception to construction, and create a superior sustainable high rise structure but it was also instrumental in helping the building to achieve an Excellent rating in BREEAM,” said Barry Mellor, Commercial and Technical Manager for Lytag.

Working with its specialist London Concrete unit, Aggregate Industries has supplied 5000m3 of Lytag to the project, with the building featuring an array of sustainable features that complement the significantly reduced carbon footprint. As a result, 100 Liverpool Street is expected to receive an Excellent rating in BREEAM.


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BDC 317 : Jun 2024