Abstract
Fiber-reinforced geopolymer composites (FRGCs) were considered in terms of application in various areas, and a review is presented in this article. FRGCs are emerging as environmentally friendly materials, replacing cement in the construction industry. An alternative inorganic binder such as a geopolymer matrix promotes environmental awareness on releasing less CO2. The inorganic matrix geopolymer is considered a greener cement for FRGCs. Various types of fiber reinforcements and their role toward the improvement of tensile, flexural, impact strength, fracture toughness, and energy absorption in overall mechanical performance in FRGCs were discussed. FRGCs and their properties in mechanical response, with correlation toward microstructure evolution at room and elevated temperatures, were also discussed. Simultaneously, the durability and impact strength of FRGCs and damage area as a function of the energy absorption were presented with 3D reconstruction images. Moreover, 3D images will cover the internal volume of the FRGCs with internal porosity and fiber orientation. Hybrid fiber reinforcement adds an extra step for the application of geopolymer composites for structural applications.
Highlights
Fiber-reinforced geopolymer composite (FRGC) is emerging as one of the alternative materials for cement in the construction industry
We focused on the effect of temperature on the strength and durability of the composite and addressed the durability, impact, and adhesion of the fiber–matrix interface and the inner volume of the composite
This review reveals various challenges, current findings, and possible applications of Fiber-reinforced geopolymer composites (FRGCs)
Summary
Fiber-reinforced geopolymer composite (FRGC) is emerging as one of the alternative materials for cement in the construction industry. The composite provides good mechanical strength of flexural modulus, loss modulus, postimpact strength, and durability for a definite period at room and elevated temperatures. A positive aspect of the geopolymer matrix used for this composite is that could provide a finite period of durability at elevated temperatures without releasing toxic gases to the surroundings [1,2,3]. The mineral geopolymers are the inorganic matrices of various types such as poly(sialate (Si:Al = 1), poly(sialate-siloxo (Si:Al = 2), poly(sialate-disiloxo) (Si:Al = 3), and poly(sialate-multisiloxo) (Si:Al > > 3) [6] This new class of hybrid materials emerges among the classic organic ones, exhibiting fire-resistant properties and zero toxicity.
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