Review on the Hybridized Application of Natural Fiber in the Development of Geopolymer Concrete

Rajendran, M.; Bakthavatchalam, Karthiga; Bharathi, S.M. Leela

doi:10.1080/15440478.2023.2178578

Cited by 7 publications

(3 citation statements)

References 51 publications

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“…Scientists expect the hybrid properties of such fiber combinations to improve geopolymers, not only in comparison to unreinforced composites, but also in comparison to mono-fiber-reinforced composites. Rajendran et al [ 10 ]’s evaluation of experiments conducted in this field showed that the addition of hybrid fiber blends changed the properties of geopolymers in almost every area. In particular, in the area of mechanical properties, the tensile strength, ductility, and impact strength were significantly improved.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, in the area of mechanical properties, the tensile strength, ductility, and impact strength were significantly improved. The hybridization of geopolymers is therefore proving to be a promising field of research [ 9 , 10 ]. It has been shown that unreinforced geopolymers have a brittle structure, which leads to their use in relatively few applications [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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The Different Properties of Geopolymer Composites Reinforced with Flax Fibers and Carbon Fibers

Brugaletta,

Becher,

Rostagno

et al. 2024

Materials

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The main motivation for this research was to improve the properties of geopolymers by reinforcement using synthetic and natural fibers, and to gain new knowledge regarding how the nature and/or the quantity of reinforcement fibers influences the properties of the final geopolymers. The main objective was to investigate the effects of different types of reinforcement fibers on the properties of the geopolymers. These reinforcement fibers were mainly environmentally friendly materials that can be used as alternatives to ordinary Portland cement. The authors used fly ash and river sand as the raw materials for the matrix, and added carbon fibers (CF), flax fibers (FF), or a hybrid of both (CFM) as reinforcements. The samples were prepared by mixing, casting, and curing, and then subjected to various tests. The main research methods used were compressive strength (CS), flexural strength (FS), water absorption (WA), abrasion resistance (Böhme’s disk method), microstructure analysis (SEM), chemical composition (XRF), and crystal structure analysis (XRD). The results showed that the addition of fibers partially improved the mechanical properties of the geopolymers, as well as reducing microcracks. The CF-reinforced geopolymers exhibited the highest compressive strength, while the FF-reinforced geopolymers showed the lowest water absorption. The authors, based on previous research, also discussed the factors that influence fiber-matrix adhesion, and the optimal fiber content for geopolymers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Different Properties of Geopolymer Composites Reinforced with Flax Fibers and Carbon Fibers

Brugaletta,

Becher,

Rostagno

et al. 2024

Materials

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show abstract

“…It is mainly occasioned by the difference between the hydrophobic nature of the polymer matrix set and the hydrophilic nature of the natural fiber. The hydrophilic aspect of NLFs is particularly induced by their microstructure that owns strongly polarized hydroxyl groups [16,17].…”

Section: Introductionmentioning

confidence: 99%

Alkaline Treatment Investigation for Sedge Fibers (Cyperus malaccensis): A Promising Enhancement

et al. 2023

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Natural fibers have some advantages in comparison to synthetic fibers, especially because they are more environmentally friendly. For this reason, using them as a reinforcement for polymeric matrices is growing exponentially. However, they present the disadvantage of having the hydrophilic nature, which strongly reduces the interface interaction. Sedge fibers have been investigated when reinforcing an epoxy matrix in terms of ballistic properties and mechanical performance. Aiming to enhance the fiber−matrix interface, an alkali treatment was proposed. The group conditions were divided into three NaOH concentrations (3%, 5%, and 10%), as well as the three periods of immersion (24, 48, and 72 h). Therefore, nine different conditions were investigated in terms of their thermal behaviors, chemical structures, physical structures, and morphological aspects. Based on TGA curves, it could be noticed that treatments related to 3% NaOH for 24 h and 48 h exhibited better thermal stability properties. For the time of 48 h, better thermal stability with for a decay of the thermal DSC curve was shown for all treatment conditions. The FTIR spectra has shown a reduction of waxes for higher NaOH concentrations. The XRD diffractogram exhibited an increase in the crystallinity index only for 5% NaOH and an immersion time of 48 h. The morphological aspects of fibers treated with 5% and 10% of NaOH have shown that the treatments have damaged the fiber, which highlighted the crystallinity index reductions.

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Alkali-activated materials with organics: A critical review

Ruan,

Gao,

et al. 2024

Composites Part B: Engineering

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Review on the Hybridized Application of Natural Fiber in the Development of Geopolymer Concrete

Cited by 7 publications

References 51 publications

The Different Properties of Geopolymer Composites Reinforced with Flax Fibers and Carbon Fibers

The Different Properties of Geopolymer Composites Reinforced with Flax Fibers and Carbon Fibers

Alkaline Treatment Investigation for Sedge Fibers (Cyperus malaccensis): A Promising Enhancement

Alkali-activated materials with organics: A critical review

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