A Review on Natural Fiber-Reinforced Geopolymer and Cement-Based Composites

Camargo, Marfa Molano; Taye, Eyerusalem Adefrs; Roether, Judith A.; Redda, Daniel Tilahun; Boccaccını, Aldo R.

doi:10.3390/ma13204603

Cited by 66 publications

(35 citation statements)

References 147 publications

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“…CFs commonly used for geopolymer reinforcement include bast fibers, leaf fibers, stem fibers, etc. [ 35 , 36 ], as shown in Figure 1 .…”

Section: Typical Properties Of Cfsmentioning

confidence: 99%

Durability of Cellulosic-Fiber-Reinforced Geopolymers: A Review

Liu

2022

Molecules

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Geopolymers have high early strength, fast hardening speed and wide sources of raw materials, and have good durability properties such as high temperature resistance and corrosion resistance. On the other hand, there are abundant sources of plant or cellulose fibers, and it has the advantages of having a low cost, a light weight, strong adhesion and biodegradability. In this context, the geopolymer sector is considering cellulose fibers as a sustainable reinforcement for developing composites. Cellulosic-fiber-reinforced geopolymer composites have broad development prospects. This paper presents a review of the literature research on the durability of cellulosic-fiber-reinforced geopolymer composites in recent years. In this paper, the typical properties of cellulose fibers are summarized, and the polymerization mechanism of geopolymers is briefly discussed. The factors influencing the durability of cellulosic-fiber-reinforced geopolymer composites were summarized and analyzed, including the degradation of fibers in a geopolymer matrix, the toughness of fiber against matrix cracking, the acid resistance, and resistance to chloride ion penetration, high temperature resistance, etc. Finally, the influence of nanomaterials on the properties of geopolymer composites and the chemical modification of fibers are analyzed, and the research on cellulosic-fiber-reinforced geopolymer composites is summarized.

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“…CFs commonly used for geopolymer reinforcement include bast fibers, leaf fibers, stem fibers, etc. [ 35 , 36 ], as shown in Figure 1 .…”

Section: Typical Properties Of Cfsmentioning

confidence: 99%

Durability of Cellulosic-Fiber-Reinforced Geopolymers: A Review

Liu

2022

Molecules

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“…This treatment process generates increased costs and makes it difficult to standardize the process, however the high abundance of natural fibers that currently exist makes this material widely available and economical, and often with superior strength characteristics than synthetic fibers [ 97 ]. On the other hand, the use of synthetic fibers brings greater reliability to the composite, due to the regularity of its production process, in addition to dispensing with surface treatments and/or changes in the geopolymer matrix [ 98 ]. A comparative study of the application of natural and synthetic fiber in a geopolymer concrete showed that, in technological terms, the natural fiber had better capacity to absorb tension in the matrix, while the synthetic fibers were more economical in the process due to no need for prior treatment [ 99 , 100 ].…”

Section: Surface Treatment Of Natural Fibersmentioning

confidence: 99%

Natural Fibers as an Alternative to Synthetic Fibers in Reinforcement of Geopolymer Matrices: A Comparative Review

Azevedo¹,

Cruz²,

Marvila³

et al. 2021

Polymers

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Geopolymer materials have been gaining ground in the civil construction sector not only for having superior physical properties when compared to conventional cement, but also for being less harmful to the environment, since the synthesis of the geopolymer does not release toxic gases or require high energy costs. On the other hand, geopolymer materials like cementitious matrices have low flexural strength and have fragile breakage. To overcome these deficiencies, the insertion of fibers in geopolymeric matrices has been evaluated as a solution. Although most research on this practice focuses on the use of synthetic fibers, the use of natural fibers has been growing and brings as an advantage the possibility of producing an even more ecological material, satisfying the need to create eco-friendly materials that exists today in society. Thus, this paper aimed to, through the evaluation of research available in the literature, understand the behavior of fibers in geopolymer matrices, identify similarities and differences between the performance of geopolymer composites reinforced with natural and synthetic fibers and, understanding that it is possible, point out ways to optimize the performance of these composites.

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“…Fibers of various lengths are considered as reinforcement in geopolymer matrices [49]. Based on the requested application, polymeric short fibers such as polypropylene (PP), polyethylene (PE), or PLA are considered as reinforcements [50].…”

Section: Short and Hybrid Fiber-reinforced Geopolymer Compositesmentioning

confidence: 99%

An Application Review of Fiber-Reinforced Geopolymer Composite

Samal

Blanco

2021

Fibers

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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.

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A Review on Natural Fiber-Reinforced Geopolymer and Cement-Based Composites

Cited by 66 publications

References 147 publications

Durability of Cellulosic-Fiber-Reinforced Geopolymers: A Review

Durability of Cellulosic-Fiber-Reinforced Geopolymers: A Review

Natural Fibers as an Alternative to Synthetic Fibers in Reinforcement of Geopolymer Matrices: A Comparative Review

An Application Review of Fiber-Reinforced Geopolymer Composite

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