Utilization of Natural Pozzolans in Sustainable Concrete
Summary
Natural pozzolans—volcanic ash, pumice, scoria and certain clays—emerge as sustainable supplementary cementitious materials (SCMs) that partially replace Portland cement. These siliceous or aluminosiliceous materials react with calcium hydroxide liberated during cement hydration to form additional calcium–silicate–hydrate (C–S–H) gels, refining microstructure and enhancing long-term performance. Deployment of natural pozzolans lowers embodied CO2 by reducing clinker demand, conserves energy and utilises abundant local resources. The reactivity, particle fineness and mineralogical composition govern their pozzolanic potential, influencing early strength, durability and permeability. Optimised blends typically incorporate 10–30 % natural pozzolans, balancing mechanical properties with environmental benefits. Global investigations reveal improved resistance to chloride ingress, reduced drying shrinkage and enhanced acid resistance, while economic assessments underscore cost savings. Integration of natural pozzolans supports circular economy principles and drives the evolution of more resilient, low-carbon concrete infrastructures worldwide.
Research from Nature Portfolio
No recent Nature Portfolio content available.
Utilization of Natural Pozzolans in Sustainable Concrete publication trend
The graph below shows the total number of articles in utilization of natural pozzolans in sustainable concrete across all publications each year (not limited to Nature Index journals).
Technical terms
Natural pozzolans: Siliceous or aluminous materials of volcanic or sedimentary origin that react with calcium hydroxide to form cementitious compounds.
Supplementary cementitious materials (SCMs): Additives that partially replace Portland cement to enhance concrete properties and reduce environmental impact.
Calcium–silicate–hydrate (C–S–H): The primary binding phase in hydrated cement responsible for strength and durability.
Permeability: A measure of the ease with which fluids can pass through hardened concrete, affecting durability.
Water-to-binder ratio: The ratio of mixing water to the sum of cementitious materials, influencing workability and strength.
References
- Effect of Mix design parameters on the properties of cementitious composites incorporating volcanic ash and dune sand. Developments in the Built Environment (2023).
- Effect of Volcanic Ash and Natural Pozzolana on mechanical properties of sustainable cement concrete: A comprehensive review. Case Studies in Construction Materials (2023).
- Fly Ash and Natural Pozzolana Impacts on Sustainable Concrete Permeability and Mechanical Properties. Buildings (2023).
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.