STRABAG and UEL Launch Low-Carbon Grout Development for Tunnelling
STRABAG UK and UEL are collaborating on a 26-month project funded by Innovate UK to develop a sustainable tunnelling grout. The £216,000 project aims to replace traditional cement-heavy grout with an alternative made from construction waste and biowaste, reducing embodied carbon by over 61%. The new formulation incorporates materials like filter cake from water treatment and agricultural by-products to improve flow performance while maintaining structural integrity.
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STRABAG UK and the University of East London (UEL) are developing a sustainable tunnelling grout through a £216,000 Innovate UK-funded Knowledge Transfer Partnership. The 26-month project aims to replace traditional cement-heavy annulus grout with a formulation made from repurposed construction waste and biowaste, achieving over a 61% reduction in embodied carbon.
This new grout partially substitutes cement and synthetic additives with excavated tunnelling material and agricultural by-products, promoting circular economy principles. The approach transforms waste streams into valuable construction inputs while maintaining technical integrity.
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