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Home News, Contacts & Resources Latest News 2018 Leca lightweight expanded clay aggregate used in construction of new London embassy

Leca lightweight expanded clay aggregate used in construction of new London embassy


Leca lightweight expanded clay aggregate (10-20mm) was selected as one of the core materials employed in the development of the new American Embassy in London. This state of the art 12-glass cube rises to 213 feet and contains more than 500,000 square feet of space in London and was designed by Philadelphia-based Kieran Timberlake. The embassy which has been a long time in the planning has opened in January.

The new American Embassy resides in one of London’s largest regeneration areas, Nine Elms, and is the near the iconic Battersea Power Station. The new embassy is a mile and a half south of the UK government’s Palace of Westminster and on the opposite bank of the Thames. A prime location for the City of London.

Over 4000m3 (10 – 20mm) of Leca lightweight expanded clay aggregate (10 – 20mm) was used for this prestigious project and was selected because of Leca LWA’s core properties, which has made it a key material for geotechnical and structural engineering. This included two specific uses involving build up at the soft landscaped area and to fill around pipes below the concrete floating slabs - providing protection from frost susceptibility during construction.  This was alongside other core properties including speed of delivery, reduced earth pressure, limited compaction, low density and ease of handling.

The Leca lightweight expanded clay aggregate was delivered on 8-wheel tippers and 2.2m3 bags because of limited, restricted and delicate access. The Leca LWA was specifically utilized for the area of the development where there will be a huge foot fall – with the purpose of minimizing the weight above the basement structure – providing additional strength and stability.

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