n alignment with National Grid Electricity Transmission’s (NGET’s) objectives of achieving net-zero construction, we aim to evaluate the suitability of polymer concretes as a sustainable alternative to traditional concrete for NGET’s construction operations, appraise their readiness for construction trials, and support NGET in undertaking some of the required trials to demonstrate these materials’ suitability. Earth Friendly Concrete (EFC) has been utilised on the LPT2 (London Power Tunnels 2) project in several areas, but mainly for bulk fill or in temporary works. To further this concrete technology and use EFC more extensively, HMJV in conjunction with its Supply Chain Partners will conduct trials to establish the potential for use in Precast Segmental Lining Elements for the benefit of future projects as part of the LPT legacy.  

Benefits

EFC saves 131.5 kgCO2e/m3 of finished product – this material could be used on future National Grid projects, which will help the company reach its net zero target and generate significant interest. Upcoming National Grid shaft and tunnelling projects which could benefit from these EFC C50/60 trials are: West London: Ealing – Laleham (22km) , Iver – North Hyde (15km) and Ealing – Willesden (7km). It is anticipated that EFC will have 40% less emissions/tonne compared to conventional concrete when used across future aforementioned projects. According to the business case, the carbon savings in next 10 years can be 13,187 tCO2e. Apart from carbon savings and wider adoption opportunity, EFC provides enhanced durability, sustainability, and low heat of hydration which is a key parameter when it comes to tunnel temperature and working conditions