Geopolymer Stabilization Techniques for Sustainable Construction Materials
Summary
Geopolymer stabilization has emerged as a transformative approach to producing low-carbon, high-performance construction materials by activating aluminosilicate precursors with alkaline solutions. By harnessing industrial residues such as fly ash, slag, red mud and other mineral wastes, geopolymers provide an eco-efficient alternative to Portland cement, considerably reducing embodied carbon and utilising local by-products. Recent advances focus on optimising mix design, curing regimes and additive combinations to tailor mechanical strength, durability under cyclic loading, and resistance to environmental stressors such as freeze-thaw or wet-dry cycles. Microstructural investigations, including X-ray diffraction and electron microscopy, have revealed refined gel network formation and improved aggregate–binder interactions at the interface transition zone, directly correlating with enhanced uniaxial compressive strength and flexural performance. Applications range from road base stabilization and pavement overlays to recycled aggregate consolidation, demonstrating the versatility of geopolymer systems in addressing infrastructure challenges across diverse climates. The global significance of these techniques lies not only in mitigating carbon emissions, but also in valorising waste streams and extending the service life of civil works. Practical field trials have confirmed scalability, while ongoing studies seek to refine activator formulations and curing strategies for real-world implementation under variable site conditions.
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Geopolymer Stabilization Techniques for Sustainable Construction Materials publication trend
The graph below shows the total number of articles in geopolymer stabilization techniques for sustainable construction materials across all publications each year (not limited to Nature Index journals).
Technical terms
Geopolymer: Inorganic polymer formed by alkali activation of aluminosilicate precursors, yielding a hardened binder with cement-like properties.
Alkali activation: Chemical process in which an alkaline solution (commonly sodium hydroxide or silicate) dissolves and polymerises aluminosilicate phases to form geopolymeric gels.
Unconfined compressive strength (UCS): Measure of axial load capacity of a material sample without lateral confinement, indicative of its bearing capacity and durability.
Interface transition zone (ITZ): Microscale region between binder matrix and aggregate particles where the microstructure governs adhesion, porosity and transport properties.
References
- Utilisation of Waste-Based Geopolymer in Asphalt Pavement Modification and Construction—A Review. Sustainability (2021).
- Research on the Pavement Performance of Slag/Fly Ash-Based Geopolymer-Stabilized Macadam. Applied Sciences (2022).
- Stabilization of Recycled Concrete Aggregate Using High Calcium Fly Ash Geopolymer as Pavement Base Material. Infrastructures (2022).
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