Review assesses hybrid fibre reinforcement's impact on geopolymer concrete's mechanical and durability properties, suggesting improved sustainability.
High performance geopolymer concrete (HPGPC) is the one alternative to ordinary Portland cement (OPC) based concrete. This is low carbon construction material option which effective utilization of industrial byproducts. They have superior mechanical and durability properties. Due to the combined action of various types of fibre, hybrid fibre reinforcement has gained increasing popularity as a means of improving crack control, ductility, toughness, and post-cracking behavior of HPGPC. The review assesses the performance of hybrid fibre-reinforced HPGPC made with different types of precursors and alkaline activators. Besides, it looks at different types of fibres, curing conditions and supplementary materials. It also focuses on the influence of these parameters on various fresh, mechanical, durability and microstructural properties of the material. This summarizes the impact of hybrid fibres on workability, strength characteristics, durability performance, and resistance to hostile environments and high temperatures. The fibre-matrix interactions, geopolymer gel formation, and crack-bridging mechanisms are explained using a suite of techniques, namely, SEM, XRD, FTIR and EDS. HPGPC offers environmental benefits, such as reduced usage of OPC and lower emissions. In the end, considerable research gaps in fibre optimization, long-term efficiency, and application in large-scales will also get identified. Overall, the hybrid fibre-reinforced HPGPC could serve sustainable and high-performance construction material.
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Predeep et al. (2026) studied this question.
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