review · Materials Today Sustainability
Modern architectural structures require strong, durable building materials, but traditional concrete faces mechanical limits and ultra-high-performance concrete often proves impractical. Low-carbon, high-performance cement-based composites offer an alternative pathway by uniting sustainability with mechanical strength. Research into these composites highlights the use of large-volume pozzolanic cementitious materials, including limestone calcined clay cement systems, inert filler powders, and alkali-activated binders. Sustainability and performance can be further boosted by substituting standard components with low-carbon fine and coarse aggregates. In addition, adding recycled waste fibres substantially improves mechanical properties, while targeted chemical additives and nanomaterials expand overall functional capabilities. Life-cycle assessments and practical validation case studies indicate that these composite systems provide measurable environmental and operational advantages over conventional concrete, offering a viable strategy for sustainable construction.
Conventional concrete production creates substantial carbon emissions, while higher-grade alternatives can be impractical to deploy at scale. Low-carbon, high-performance cement-based composites offer a realistic route to lower the environmental footprint of the building sector. By balancing high mechanical strength with industrial by-products, recycled waste fibres, and lower-emission binders, these materials support the transition toward sustainable infrastructure without compromising on structural integrity.
This technology addresses the commercial construction and infrastructure sectors, targeting concrete manufacturers, structural engineers, and contractors seeking lower-carbon building solutions. By incorporating recycled waste fibres, low-carbon aggregates, and established binders such as LC3, the composites demonstrate clear real-world feasibility. The presence of practical validation case studies and life-cycle analyses suggests the technology is moving beyond early-stage laboratory research into applied testing and pilot deployment for structural applications.
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The evolution of concrete materials faces challenges in meeting the mechanical demands of contemporary architectural structures due to the limitations of conventional concrete and the impracticalities of ultra-high-performance concrete. Addressing this, the exploration of Low-Carbon, High-Performance Cement-Based Composites (LCHPCC) emerges as a strategic avenue. This paper investigates diverse materials within the LCHPCC realm, emphasizing material selection and innovative processes to bolster performance and sustainability. The study delves into large-volume pozzolanic cementitious materials, including the LC3 system, inert filler powders, and alkali-activated systems. It underscores critical considerations for optimizing powder material utilization in low-carbon methodologies. Furthermore, enhancing the aggregate system with low-carbon fine and coarse aggregates enhances the high-performance and low-carbon characteristics of LCHPCC. Incorporating recycled waste fibers significantly increases the mechanical properties of LCHPCC. Additionally, the integration of specific chemical additives and nanomaterials not only elevates performance but also broadens the application potential of LCHPCC. A life-cycle assessment analysis and practical validation case studies demonstrate the substantial advantages of LCHPCC over traditional concrete, emphasizing its sustainable attributes. This paper offers a balanced proposition for the ongoing development of low-carbon concrete materials, aligning with the principles of sustainable construction.
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DOI: 10.1016/j.mtsust.2024.100712
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