One-Part Alkali-Activated Geopolymer Materials
Summary
One-part alkali-activated geopolymer materials represent a class of sustainable cementitious binders that require only the addition of water to initiate reaction, thereby offering a “just-add-water” approach. By combining aluminosilicate precursors—such as fly ash, ground granulated blast-furnace slag or calcined clays—with a solid alkali activator, these systems eliminate the need for handling caustic liquid solutions on site. The ensuing geopolymerisation process yields a three-dimensional inorganic polymer network, predominantly comprising sodium aluminosilicate hydrate (N-A-S-H) or calcium–aluminosilicate hydrate (C–A–S–H) gels, which confer high early strength, chemical durability and thermal stability. Compared with ordinary Portland cement, one-part geopolymer materials offer reduced carbon footprint, valorisation of industrial by-products and enhanced resistance to aggressive environments. Practical applications range from precast elements and repair mortars to fire-resistant linings and waste encapsulation matrices, reflecting their versatility and global relevance in low-carbon construction and infrastructure sectors.
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One-Part Alkali-Activated Geopolymer Materials publication trend
The graph below shows the total number of articles in one-part alkali-activated geopolymer materials across all publications each year (not limited to Nature Index journals).
Technical terms
Alkali-activated materials: Cement-free binders formed by activating aluminosilicate precursors with alkaline reagents to produce inorganic polymer gels.
Geopolymerisation: Chemical process in which aluminosilicate species dissolve and reassemble into a three-dimensional network of Si–O–Al bonds under alkaline conditions.
One-part mix (solid activator): A dry blend of precursor and powdered alkali source requiring only water addition to trigger geopolymerisation.
Precursor: Aluminosilicate-rich industrial by-product (e.g., fly ash, slag, calcined clay) that serves as the source of silica and alumina in geopolymer synthesis.
N-A-S-H gel: Sodium aluminosilicate hydrate, the main binding phase in low-calcium geopolymer systems, responsible for strength and durability.
References
- Formulation and characterization of cleaner one-part novel fly ash/lime-based alkali-activated material. Journal of Materials Research and Technology (2023).
- Phase dissolution and improving properties of completely decomposed granite through alkali fusion method. Cement and Concrete Composites (2022).
- One-Part Alkali-Activated Materials: State of the Art and Perspectives. Polymers (2022).
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