Reducing carbon emissions in the cement industry is a global priority as demand for construction materials continues to grow. This SACAA overview, based on research from Imperial College London, explores practical strategies to decarbonise cement production using alternative materials, cleaner energy sources, and carbon capture technologies. Cement production is responsible for a significant share of global CO₂ emissions, largely due to the energy-intensive process and the chemical release of carbon during clinker production. The report highlights how combining carbon capture and storage (CCS), alternative fuels, and clinker substitution can dramatically reduce emissions—potentially achieving near-zero or even negative carbon outcomes.
Key Insights / Summary
Key Topics Covered:
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Cement production contributes around 7% of global CO₂ emissions
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Carbon emissions come from both fuel use and chemical processes in clinker production
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Carbon capture and storage (CCS) can significantly reduce process-related emissions
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Biomass and municipal waste can replace fossil fuels in cement kilns
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Combining waste fuels with CCS can achieve major emission reductions
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Clinker substitution using materials like coal ash and slag reduces carbon intensity
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Up to 30–40% clinker replacement possible without compromising strength
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Deep decarbonisation requires combining multiple strategies
Benefits
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Reduces greenhouse gas emissions and environmental impact
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Supports sustainable construction and low-carbon infrastructure
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Promotes circular economy through use of waste materials
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Enables potential carbon credits and regulatory compliance
Related Resources
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Fly Ash in Cement Manufacturing: Performance, Standards & Optimization
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Ash Beneficiation in Construction and Mining: Sustainable Materials & Low-Carbon Innovation
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What Do We Know About Coal Ash? Understanding Types, Uses & Industry Potential
