Eco-Concrete, Industrial Transition, and the Communities Left Behind – or Brought Along
There is a town somewhere in Central Europe — you can find its equivalent in a dozen countries — whose identity is inseparable from its cement plant. The plant has been there for generations. It employs several hundred people directly and supports several hundred more through the local businesses, services, and supply chains that exist because of the wages it pays. Its white dust settles on the windowsills of houses that were built by people who worked there. Its shift patterns organize the rhythms of the town.
Ordinary Portland cement — the material that plant produces — is responsible for approximately 8% of global CO2 emissions. It is one of the most consequential industrial sources of carbon on the planet, and its transformation is not a distant policy ambition. It is already under way. The question facing that town, and dozens like it, is not whether the cement industry will change. It is whether the change will be managed in a way that brings communities through it, or one that simply leaves them behind while cleaner alternatives are built elsewhere by different people.
SNUG’s autoclaved aerated eco-concrete blocks sit directly at this intersection. They represent one of the most technically ambitious elements of the project — a successful reformulation of autoclaved aerated concrete that completely replaces ordinary Portland cement with ground granulated blast furnace slag and other industrial by-products, achieving comparable structural and thermal performance at significantly lower environmental cost. They are, in miniature, a proof of concept for the kind of industrial transition the entire cement and concrete sector will need to undergo.
This final post in our series is about what that transition means for the people who work in it — and specifically for the women who are doubly marginalized in the story of industrial change: underrepresented in the industry as it is today, and at risk of being overlooked again in the industry as it is remade.
What SNUG’s eco-concrete blocks achieve
The technical achievement at the heart of SNUG’s autoclaved aerated eco-concrete work deserves to be stated clearly, because it is genuinely significant. Over an eighteen-month development process, the project produced five distinct AAC formulations — all based on the complete replacement of ordinary Portland cement with ground granulated blast furnace slag (GGBFS), activated with lime and in some cases supplemented with calcium carbide slag (CCS), a further industrial byproduct.
The results exceeded the project’s own expectations. The best-performing BFS-CCS formulations achieved compressive strengths comparable to the commercial OPC-based reference product, while maintaining low densities in the range of 420 to 441 kg/m³ and thermal conductivities between 0.111 and 0.119 W/(m·K) — performance characteristics that make these blocks viable for real building applications, not just laboratory specimens. Life cycle assessment confirmed significant improvements in environmental and economic indicators across all formulations compared to the commercial reference.
What makes this particularly interesting from a workforce and community perspective is the raw material story. GGBFS is a by-product of iron and steel manufacturing — the granulated slag that is separated from molten iron in the blast furnace and then ground to a fine powder. Calcium carbide slag is a by-product of the acetylene production industry. Both are industrial waste streams, currently managed at cost by the industries that produce them. SNUG’s eco-concrete formulations turn those waste streams into a valuable input — which means that the supply chain for these blocks is anchored in existing industrial communities, many of them in precisely the kind of heavy industrial towns and regions that are facing the sharpest pressures from the green transition.
~8% of global CO2 emissions come from cement production — making it one of the most significant industrial decarbonisation challenges of the coming decades
100% replacement of ordinary Portland cement achieved in SNUG’s best-performing eco-concrete formulations, using GGBFS and calcium carbide slag as sustainable alternatives
Industrial transition and the communities it touch
The decarbonisation of heavy industry is the subject of enormous policy attention at the EU level — from the Emissions Trading System to the Carbon Border Adjustment Mechanism to the Just Transition Fund, which specifically acknowledges that the shift away from carbon-intensive industries will impose costs on communities that have structured their economies around them. These are the right instincts. The execution, however, frequently underestimates the human complexity of the transitions it is trying to manage.
Industrial workers in cement, steel, and related heavy industries are not a homogeneous group. They include skilled engineers, laboratory technicians, logistics and procurement professionals, health and safety specialists, environmental compliance staff, and administrative workers alongside the machine operators and manual workers who tend to dominate the public image of the sector. Many of these roles transfer readily into a reformed industry — one producing lower-carbon materials from different input streams requires the same quality management, the same process engineering, the same environmental monitoring. The knowledge base does not need to be discarded. It needs to be redirected.
Women in these industries — already a minority in most roles, and concentrated in the administrative, laboratory, and technical support functions — face a particular risk in industrial transitions. When restructuring happens, the roles that are most vulnerable to elimination or outsourcing are often exactly those in which women are overrepresented: back-office functions, quality control support, laboratory assistance. The engineering and process roles that survive and evolve tend to be those where women are already underrepresented. Transition, in practice, can function as a mechanism for further concentrating employment in a narrowing set of male-dominated core functions.
Avoiding that outcome requires deliberate design. It requires transition planning that explicitly maps the current gender composition of the workforce alongside the projected future skill requirements, identifies the gaps and overlaps, and creates structured pathways for women currently in at-risk roles to move into the roles the new industry will need. It requires training investment that targets women specifically, not just as a general upskilling initiative. And it requires a cultural shift in how industrial employers think about who belongs in technical and engineering roles — a shift that transition is a genuine opportunity to accelerate, if the will exists to do so.
Transition can function as a mechanism for further concentrating employment in male-dominated roles — or it can be the moment when a different kind of industry is deliberately built. The choice is real.
The laboratory and quality roles — an underappreciated pathway
SNUG’s eco-concrete development process offers an instructive example of where women already contribute — and where they could contribute more. The eighteen months of formulation work that produced the project’s five AAC mixtures involved extensive laboratory characterisation: measuring workability and foaming behaviour, testing compressive strength, analysing phase composition, assessing density and thermal conductivity, and conducting life cycle assessments. This is skilled, technically demanding work that sits at the intersection of materials science, chemistry, and environmental analysis.
In the broader construction materials sector, women’s participation in laboratory, quality assurance, and environmental compliance roles is higher than in site-based construction — though it still falls well short of parity in most European countries. These are the roles from which the next generation of materials engineers, process innovators, and sustainability specialists will be drawn. They are also the roles that a transition to lower-carbon materials is going to need more of, not fewer: as the industry works through new formulations, new input streams, and new quality standards, the demand for people who can characterise, validate, and certify new materials will grow substantially.
Investing in women’s pathways into materials science and engineering education — from secondary school through to postgraduate research — is therefore not just a gender equity measure. It is a direct investment in the human capital that the green industrial transition needs. Countries and companies that treat these two objectives as separate are missing an obvious convergence. The R&D pipeline for sustainable construction materials and the pipeline of women into science, technology, engineering, and mathematics degrees are the same pipeline. Widening one widens the other.
Industrial scaling and the communities that will build it
SNUG’s eco-concrete development is now moving towards the next phase: industrial scaling. The laboratory has produced compelling results. The challenge now is to translate those results into consistent, high-quality production at a scale that can serve the construction market — adjusting mix temperatures, foam stability, and pre-curing times for the realities of a production plant rather than a laboratory bench.
This is where the community dimension becomes most immediate. Industrial-scale production of eco-concrete blocks will require manufacturing facilities, raw material supply chains, quality control systems, and distribution networks. These will employ people — in regions that may or may not currently be home to the industrial infrastructure that makes GGBFS and calcium carbide slag available. The decisions about where production facilities are located, who is contracted to supply raw materials, what workforce is recruited and trained, and how that recruitment is conducted, will determine the community impact of this technology at least as much as its technical performance.
From a workforce inclusion perspective, the industrial scaling phase is a founding moment. The norms, cultures, and demographic compositions that become established in a new production facility in its first years tend to persist. A factory that opens with a predominantly male production workforce and no deliberate strategy for women’s inclusion will likely remain that way. A factory that opens with explicit targets, active recruitment from women’s vocational programmes, and a management team that treats inclusion as an operational priority has a realistic chance of building something different.
The same logic applies to the construction sites where these blocks will be installed. Aerated concrete block laying is a well-established trade — but the eco-concrete variants require additional knowledge of the material’s specific properties, its different behaviour in cutting and fixing, and the quality assurance requirements associated with a newer, less standardised product. The training programmes that teach those skills are being written now. The question of who is recruited into them is being answered now, whether consciously or not.
A factory that opens with explicit inclusion targets and active recruitment from women’s vocational programmes has a realistic chance of building something different. But only if those choices are made at the founding moment.
A just transition that includes women — what it requires
The phrase ‘just transition’ has become familiar in European climate and industrial policy. It acknowledges, rightly, that the move away from carbon-intensive industries imposes real costs on real communities, and that those costs need to be managed fairly rather than simply imposed. The Just Transition Fund, the social clauses in the European Green Deal, and the national transition frameworks in countries from Germany to Poland to Spain all reflect this acknowledgement.
What is less consistently present in just transition frameworks is a gender analysis. The question of how industrial transition affects women differently from men — in terms of which jobs are lost, which are retained, which new ones are created, and who has access to the retraining needed to move between them — is frequently absent from transition planning documents, or present only as a brief acknowledgement without operational content.
Making the just transition genuinely just for women requires several things to happen simultaneously. It requires gender-disaggregated data on the current industrial workforce, so that transition planning knows what it is actually transitioning from. It requires explicit targets for women’s participation in retraining and reskilling programmes, not just open access. It requires that the new industries and new roles created by the green transition — in sustainable materials manufacturing, in energy retrofit, in environmental compliance and certification — are designed with women’s participation as a founding assumption rather than an afterthought. And it requires accountability: reporting on outcomes, not just intentions.
Projects like SNUG, working at the frontier of sustainable materials development, are not industrial policy instruments. But they are influential in shaping how new products and new supply chains are conceived — and they have a platform to make the case, through their publications, their communications, and their networks, that inclusion is not a separate agenda from innovation. It is part of what makes innovation worth doing.
Industrial scaling next steps
SNUG’s eco-concrete development is moving towards industrial-scale production adjustment, including fine-tuning mix temperature, foam stability, and pre-curing time. Fire resistance testing is also planned once blocks are produced in sufficient numbers at pilot scale. These next phases create new workforce roles at every level, from production to quality assurance.
GGBFS supply chains
Ground granulated blast furnace slag — the primary binder in SNUG’s eco-concrete formulations — is produced at iron and steel plants across Europe, many in industrial regions facing transition pressure of their own. Using GGBFS as a construction material input creates value from a waste stream, supports the economic case for keeping those plants operating, and anchors the eco-concrete supply chain in communities with existing industrial workforce capacity.
The certification opportunity
New construction materials require new quality standards, new certification processes, and new testing and verification competencies. The development of accreditation frameworks for SNUG materials — eco-concrete blocks, aerogel insulation, biopanels — creates professional roles that do not yet have established incumbent workforces. These are positions that women can enter on equal terms if recruitment is deliberate and training pathways are visible.
What this series has argued — and what comes next
This is the fifth and final post in a series that has used SNUG’s four material streams as entry points into a single, sustained argument: that the green building transition and the inclusion of women in construction are not separate agendas. They are the same project, approached from different angles.
Across the series, we have seen that argument play out in different registers. In hemp biopanels, it was about supply chain equity — ensuring that the women who grow the raw materials have pathways into the higher-value roles that those materials generate. In aerogel insulation, it was about skills gaps — recognising that a new, technically demanding specialism is still being formed, and that who gets trained first will shape who dominates it for decades. In phase-change mortars, it was about the human dimension of retrofit — the households that need it most, the workforce that serves them, and the quality case for making that workforce more diverse. In eco-concrete, it is about industrial transition at scale — the communities built around heavy industry, the women within them, and the founding choices being made about what the next generation of sustainable materials production looks like.
The thread running through all of it is timing. The green building transition is creating new industries, new skills, new roles, and new supply chains faster than the workforce inclusion infrastructure is keeping pace. The window in which deliberate choices about who participates can still shape outcomes is open — but it will not remain open indefinitely. As markets form, as incumbency patterns harden, as training programmes mature and professional networks consolidate, the cost of inclusion rises and its ease diminishes.
The argument of this series is not that inclusion will happen automatically if we develop better materials. It will not. Inclusion requires deliberate action in training, procurement, site culture, industrial policy, and the everyday decisions of employers and project managers. What the materials do is create the occasion — the moment of genuine newness in which different choices are possible. SNUG is creating those occasions. What the sector does with them is the question that this series has tried, in five posts, to make impossible to ignore.
This is the final post in the SNUG Workforce Inclusion Blog Series.
SNUG is a Horizon Europe project developing circular economy-based sustainable insulation materials and prefab solutions for building envelopes. This blog series explores the intersection of materials innovation and workforce inclusion.
By courtesy of CRES – Centre for Renewable Energy Sources and Saving
