As the world moves towards zero emissions, decarbonising cement is often described as the most difficult challenge. Portland Cement, which is used to make concrete and mortar, is made in tremendous volumes (more than 500 kg per person per year for everyone on the planet), is cheap (~£60/tonne) and has excellent properties for construction. However, it causes a quarter of all the world's industrial emissions, both due to fuel combustion in high-temperature cement kilns, and because the chemistry of converting limestone into clinker, the key ingredient of cement, inevitably causes the release of carbon dioxide. Many alternative compositions of cement are under development, but although some may lead to reduced emissions, none have zero emissions. Two possible approaches to capturing and storing emissions are under development - one capturing all the emissions of a plant and storing them underground, and the other embedding emissions within pre-cast blocks - but neither is yet operating at scale, and both face many challenges. Without cement, we will have no concrete, and construction will have to change radically largely shifting from new-build to retrofit and adaption. Countries responsible for around 70% of the world's GDP have now committed to zero emissions targets by 2050 or 2060, so the problem of cement emissions is both large and urgent. This proposal explores the world's first process that could produce Portland cement with no emissions. The investigators noticed that the lime-flux used in today's electric steel-recycling furnaces has almost the same chemical composition as that of old cement paste - the material that is left when old concrete is crushed, and sand and aggregate is removed. In preliminary trials, using the small electric arc furnace of the Material Processing Institute, we replaced the conventional flux with used cement. We separated the hot liquid slag that floats on the surface of molten steel during recycling and cooled it to form a powder which we then mixed with gypsum and cast into small cement samples. Analysis of our tiny pilot study cement samples showed that they were very similar to conventional Portland cement. This points to the exciting possibility that we could make cement as a by-product of steel recycling, which could be powered by non-emitting electricity - therefore giving us both zero emissions steel and zero emissions cement. This proposal aims to explore the science around this discovery. We need to find out how the composition of old cement varies, and how this variation affects our new product. We need to explore what effect our new process has on conventional steel recycling - does it change the composition of the steel, does it damage the furnace lining, and how does the type of steel being recycled affect our new cement? And we need to find out more about the properties of our new cement: how durable is it, how quickly does it reach full strength, and so on. If this new process is as good as we hope, we will want to develop it rapidly to commercial scale, and the technique for making it could become a major UK export. The final component of our proposal is therefore to develop a "roadmap" for taking the idea from lab-scale trials to full deployment. We will explore this question with a consortium of partners, a science advisory panel, and with outward facing partners who could help us champion the new approach.

This project will demonstrate how one of the largest industries in the UK can utilise a digital platform to harness the benefits of a sustainable circular supply chain, so as to reduce waste, increase safety, and promote greater fiscal responsibility. The Architecture, Engineering & Construction (AEC) sector plays a crucial role in the UK economy by employing over 2 million people to deliver civil engineering projects that underpin our economic growth. One of the biggest contributors to GDP, the ACE sector represents commercial activity spanning individual contractors through to multi-national corporations collaborating through complex asset distribution networks that account for over £10 billion of trade. This network of activity consumes millions of tonnes of materials and produces more waste than all other industries combined, partly due to an inability to maintain an industry wide knowledge of material usage. Reclamation accounts for a fraction of industry activity due to intensive manual costs and is only economically viable for high cost, often historically valuable, materials. A key challenge therefore is a need to not only reclaim, but to track all material/asset usage throughout their lifecycles. Our approach is to build a digital platform and assess the associated business models within which the built environment can provide the tracing of materials without evasive building inspections for recall and resume activity. The main outcomes of the research will be: 1. A digital (software) platform that harnesses the potential of multi-layered blockchains, to balance local autonomy of transaction recording/management, whilst maintaining a consistent provenance trail of recorded activity within each stage of the AEC lifecycle. 2. The concept and implementation of a 'material & service passport' to show the circularity potential of materials/ components/ assets/ services and enable stakeholders (e.g. designers, main contractors, manufacturers and clients) to assess the likelihood for circularity. 3. A road map based on the co-developed (with industry) digital platform and circular supply chain models, to incentivise collective supply chain behaviours towards circular economy and environmental sustainability.

SUSTAIN is an ambitious collaborative research project led by the National Steel Innovation Centre at Swansea University to transform the productivity, product diversity and environmental performance of the steel supply chain in the UK. Working with Warwick Manufacturing Group and the University of Sheffield, the SUSTAIN Manufacturing Hub will lead grand challenge research projects of carbon neutral steel and ironmaking and smart steel processing. Carbon neutral steel making will explore how we can transition the industry from using coal as its primary energy source to a mix of waste materials, renewable energy and hydrogen. Smart steel processing will examine how digital technology and sensors can be used to increase productivity and also explore how a transformation in the way in which steel is processed can add significant value and create new markets, in particular construction, whilst expanding the opportunities afforded by advanced steel products in the electrification of vehicular transport. The UK steel businesses cover different market sectors and are all engaged in this project committing >£13M in supporting funds. Tata Steel lead work on strip steel products used in automotive (inc electrical steels for generators and motors construction) and packaging applications. British Steel produce long products for key sectors such as rail transport and construction. Liberty Specialty produce unique steels for sectors such as aerospace and nuclear power, Sheffield Forgemasters manufacture products for power generation, defence and civil nuclear industries, and Celsa make section steels and reinforcement primarily for construction. This represents a key element of advanced materials that underpin a large proportion of the UK manufacturing sector. The increasing diversity and lower carbon intensity of UK made steel products together with greater productivity and efficiency will thus benefit the whole of UK manufacturing and create opportunities for manufacturing to make inroads into traditional areas for example by driving offsite manufactured construction alternatives to traditional low skill labour intensive routes. Steel is the world's most used and recyclable advanced material and this project aims to transform the way it is made. This includes approaches both to use and re-use it and harness opportunities to turn any waste product into a value added element for another industry. To illustrate, a steel plant produces enough waste heat to power around 300,000 homes. New materials can trap this heat allowing it to be transported to homes and offices and be used when required without the need for pipes. This then makes the manufacturing site an embedded component of the community and is clearly a model applicable to any other high energy manufacturing operation in other sectors. We will at each stage explore how our discoveries in transforming steel can be mapped onto other key foundation materials sectors such as glass, petrochemicals and cement. Implementation of the research findings will be facilitated via SUSTAIN's network of innovation spokes ensuring that high quality research translates to highly profitable and competitive processes.

The Materials Made Smarter Centre has been co-created by Academia and Industry as a response to the pressing need to revolutionise the way we manufacture and value materials in our economy. The UK's ability to manufacture advanced materials underpins our ambitions to move towards cleaner growth and a more resource efficient economy. Innovation towards a net zero-carbon economy needs new materials with enhanced properties, performance and functionality and new processing technologies, with enhanced manufacturing capability, to make and deliver economic and societal benefit to the UK. However, significant technological challenges must still be overcome before we can benefit fully from the transformative technical and environmental benefits that new materials and manufacturing processes may bring. Our capacity to monitor and control material properties both during manufacture and through into service affect our ability to deliver a tailored and guaranteed performance that is 'right-first-time' and limit capacity to manage materials as assets through their lifetime. This reduces materials to the status of a commodity - a status which is both undeserved and unsustainable. Future materials intensive manufacturing needs to add greater value to the materials we use, be that through reduction of environmental impact, extension of product life or via enhanced functionality. Digitalisation of the materials thread will help to enhance their value by developing the tools and means to certify, monitor and control materials in-process and in-service improving productivity and stimulating new business models. Our vision is to put the UK's materials intensive manufacturing industries at the forefront of the UK's technological advancement and green recovery from the dual impacts of COVID and rapid environmental change. We will develop the advanced digital technologies and tools to enable the verification, validation, certification and traceability of materials manufacturing and work with partners to address the challenges of digital adoption. Digitisation of the materials thread will drive productivity improvements in materials intensive industries, realise new business models and change the way we value and use materials.

Achieving the carbon target for steel and aluminium requires an industry-wide transformation which will result in new business models and new metal flows. The proposal aims to identify credible scenarios for achieving the target, to specify the barriers to achieving them, and to define the economic and policy measures required to drive change. In parallel, the proposal aims to deliver basic technology research that will allow more options for a future materially efficient steel and aluminium economy.It is widely agreed that a cut of at least 60% in global greenhouse gas emissions will be required by 2050 to limit the adverse effects of climate change. Steel and aluminium are responsible for 8% of global energy related emissions. Industry efforts to date have focused on reducing energy in primary production, and recycling metal by melting and re-casting. However, demand for both steel and aluminium is forecast to double, recycling rates are already around 60-70% and the most optimistic projections for energy efficiency improvements deliver only 30% reduction per unit output of material. Efficiency improvements alone are not sufficient, but the 2050 target can be achieved if, in addition to existing measures, energy used in converting ingots to products is halved, the volume of metal used in each application is reduced, and a substantial fraction of metal is re-used without melting. In pursuing this strategy, this proposal is aligned with the EPSRC strategic theme on energy demand reduction.The need for clarity about the physical implications of responding to the carbon target has become a major priority in the metal producing and using industry. Without the work described in this proposal, it is not possible for the government, industry and the public to understand and negotiate the choices they must collectively make in order to meet the carbon target in this sector. Accordingly, this proposal comes with support of 2 million in committed effort from 20 global companies, all with operations in the UK. The business activities of the consortium span primary metal production, conventional recycling, equipment manufacture, road transport, construction, aerospace, packaging and knowledge transfer.The work of the fellowship will be split between business analysis and technology innovation themes. The business analysis theme will identify future scenarios, barriers and a roadmap for meeting the target. This work will include specific analysis of future metal flows, application of a global economic model and the analysis of policy measures. The technology innovation theme aims to optimize the requirements for metal use through novel manufacturing process design, to increase material and energy efficiency in forming and finishing, and to develop solid-state closed-loop recycling for metals. Both themes will be developed in collaboration with the consortium, and will also draw on an international scientific panel and a cross-disciplinary advisory panel in Cambridge.The work will lead to two major reports for wide distribution, direct dissemination into the partner companies, training courses, technology assessments and physical demonstrations of the technology innovations. These will include a demonstration for public engagement. The results of the work on steel and aluminium will be used to stimulate interest among business leaders in other sectors, and will form the basis for a longer term Centre for Low Carbon Materials Processing in Cambridge.The Leadership Fellowship offers a unique and timely opportunity to undertake the basic research required to drive a step-change in material efficiency, by demonstrating that a different flow of metal through the global economy is technically and economically possible, and by inspiring and informing those who can influence change.