Cement Materials: Low Carbon Cement and Alternatives-Cement Materials- low carbon cement and alternatives

Video Transcription

Video Summary

PCI’s webinar introduced strategies for lowering the embodied carbon of precast concrete while maintaining performance. Presenter Larry Roland of Heidelberg Materials explained that cement is the main source of concrete’s carbon footprint because clinker production releases CO2 during limestone calcination. He reviewed life cycle assessment and EPDs, showing how embodied carbon is measured from raw material extraction through production, transport, and installation.<br /><br />Roland highlighted lower-carbon options such as Portland limestone cement, slag cement, fly ash, and emerging calcined clay materials. He noted that blended cements reduce clinker content and can cut global warming potential significantly, though mixes may need adjustments such as admixture changes, slightly higher water-cement ratios, or accelerators to maintain early strength. He also emphasized the importance of working closely with cement and admixture suppliers and running trial batches.<br /><br />The presentation ended with a discussion of carbon capture and storage as the long-term decarbonization path for the cement industry. Roland encouraged producers to stay proactive, use EPDs for transparency, and communicate sustainability efforts to owners and stakeholders.

Keywords

embodied carbon

precast concrete

cement decarbonization

life cycle assessment

environmental product declarations

Portland limestone cement

blended cements

carbon capture and storage

sustainable concrete