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Case Study

BAM Ritchies

Deliver a novel technology for in-situ repair of existing infrastructure, based on Microbially InducedCalcite Precipitation (MICP). 

Sand firmly shaped in a cylinder.

BAM Ritchies

BAM Ritchies is a specialist ground engineering business working within the UK civil engineering and construction sector. The BAM UK&I business is part of Royal BAM who undertake similar activities in Holland and are listed on the Dutch stock exchange. 

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What was the need?

The Challenge

The transition from controlled laboratory experiments to large-scale field application presents several challenges. A major site requires the production of large volumes of bacterial and nutrient solutions, and their transport and storage. Appropriate injection equipment needed for the site and scale of the project, such as pumps, piping, and monitoring systems, need to be identified to uniformly inject or treat large soil volumes without clogging. A by-product of the bacterial activity is ammonium which needs to be managed safely. Finally, successful implementation depends on the selection of sites through careful preliminary investigations of properties like the orientation and aperture of fractures for infrastructure repair and the in situ grain size distribution and permeability for soil strengthening.

What did we do?

The Solution

The current solution focuses less on altering the MICP chemistry and more on practical engineering strategies proving the scalability of MICP. Large volumes of cultured bacteria could be avoided by enhancing the site’s existing microbial community. The risk of clogging and uneven treatment is managed by laboratory and field testing of injection equipment to identify processes for reliable, large-scale treatment. Ammonia management needs to be considered in the treatment procedures, including techniques such as extraction, flushing and air flow management. The main strategy to develop MICP in the field is by purpose-designed case studies. Small and controlled trials are used to mimic large-scale field conditions. These are used to test the new procedures—equipment, protocols, and ammonia management—at a representative scale. Successful demonstration of the application will validate the large-scale use of MICP in the field.

What changed?

The Impacts and Benefits

Impacts for the Company

A Knowledge Transfer Partnership (KTP) focused on commercialising Microbially Induced Calcite Precipitation (MICP) for crack repair and ground improvement could bring significant strategic and operational benefits to BAM. By embedding academic expertise directly into the business, the KTP would accelerate BAM’s ability to turn innovative MICP research into practical, scalable solutions.

For BAM, the greatest impact lies in targeted crack repair. MICP offers a biologically‑driven way of restoring durability without relying on synthetic resins or other chemically aggressive products. Its ability to stabilise fine cracks with minimal material input provides a greener repair option and, critically, helps avoid heavy patch repairs, intrusive interventions, or, in extreme cases, partial demolition and reconstruction. This shift from reactive, high‑carbon repairs to earlier, low‑impact interventions can reduce disruption, extend service life, and lower whole‑life costs for clients.

While ground improvement remains a promising application, the immediate value is in strengthening BAM’s repair portfolio. Developing this capability in‑house would allow BAM to differentiate its services, offer clients more sustainable alternatives, and ultimately position the company as an early leader in bio‑based construction technologies, opening new opportunities across asset management, remediation, and sustainable ground engineering.

 

Impacts for the Academic Team 

This project allows the academic team to validate their laboratory research under field conditions. It bridges the gap between theoretical models and small scale experiments to real-world application. The direct feedback from large-scale trials can be used to optimise strategies for injection, equipment, and by-product management. Successfully demonstrated field applications can be used as evidence for securing future funding and industrial partnerships. The project creates datasets, operational protocols, and practical case studies that can be published in peer-reviewed journals and presented at conferences. The close collaboration with industry partners ensures the research remains applicable and up to date to industry interests allowing recognition as a leading team in bio-mediated ground engineering.

 

Impacts for the KTP Associate 

The KTP Associate gains direct, practical experience in scaling a biogeotechnological process from the lab to the field. The role provides hands-on training in industrial project management, including sourcing materials and operating specialised injection equipment, site characterisation, and by-product management.

This role builds a professional network that connects the KTP Associate directly with both leading academics and industry practitioners by leading sustainable geotechnical projects from initial design through to field implementation. It establishes a foundation for a career focused on practical, innovative solutions in civil engineering.

The Impacts and Benefits

The People

Meet the Team

Dr Jessica Dassow

KTP Associate


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Professor Rebecca Lunn

Knowledge Base Supervisor


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Sarah Sherratt

Company Supervisor


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