On the Durability Behavior of Natural Fiber Reinforced Geopolymers

Trindade, Ana Carolina Constâncio; Silva, F. A.; Alcamand, Himad Ahmed; Borges, Paulo Henrique Ribeiro

doi:10.1002/9781119474746.ch20

Cited by 20 publications

(12 citation statements)

References 14 publications

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“…10b). The latter is due to the improvement of the fiber-geopolymer matrix adhesion because of the modification of the chemical composition of the fibers during the accelerated aging under hot and wet condition that enhances the adhesion of the fibers to the geopolymer matrix (Trindade et al, 2018).…”

Section: Resistance To Wet-dry Cyclesmentioning

confidence: 99%

Iron-rich laterite-bagasse fibers based geopolymer composite: Mechanical, durability and insulating properties

Nkwaju

Djobo

Nouping

et al. 2019

Applied Clay Science

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This work reports the mechanical, durability and insulating properties of novel geopolymer composites made of iron-rich laterite and sugarcane bagasse fibers with sodium silicate as a hardener. The results showed that the addition of fibers was beneficial for improving the fracture behavior of iron-rich laterite based geopolymer from brittle to ductile. The 28 days compressive strength ranges from 50 MPa to 14 MPa with the content of fibers. The modulus of elasticity was improved by 50% with only 3 wt% of fibers. The geopolymer composites perform well after 20 wet-dry cycles with the improvement of its ductility. The 28 days thermal conductivity decreases from 0.77 W/mK to 0.55 W/mK with the fibers content.

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Section: Resistance To Wet-dry Cyclesmentioning

confidence: 99%

Iron-rich laterite-bagasse fibers based geopolymer composite: Mechanical, durability and insulating properties

Nkwaju

Djobo

Nouping

et al. 2019

Applied Clay Science

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“…The performance of composites against wetting/drying cycles is an important part of durability. Trindade et al [ 86 ] formulated two geopolymers of 100% metakaolin (MK) and 60% (MK) + 40% blast furnace slag (BFS). The mechanical behavior of the two matrices is changed by the jute reinforcing fiber to make it ductile and change its crack mode.…”

Section: Research Status Of the Durability Of Cfgcsmentioning

confidence: 99%

“…Another experiment [ 86 ] found that there were fine crack networks on pure geopolymer heated at 400 and 600 °C. After over 600 °C, severe cracks appear on the surface.…”

Section: Research Status Of the Durability Of Cfgcsmentioning

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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“…Recent studies demonstrate great improvements in the mechanical behavior of geopolymers with the use of reinforcements, such as: fique [4]; glass [5]; jute [2]; and steel fibers [6]. It is interesting, however, to notice that despite presenting distinct microstructural properties, it is possible to correlate the adhesion and stress transfer mechanisms of geopolymer and cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

“…However, with the knowledge dissemination and further investigations performed by several research groups around the globe, additional features appear as advantages in the use of this technology, such as: high th Brazilian Conference on Composite Materials. Rio de Janeiro, July 22 nd -25 th , 2018 2 resistance in early ages [1]; improved durability behaviour [2]; and great adhesion performance with distinct types of fibers.…”

Section: Introductionmentioning

confidence: 99%

Mechanical response of geopolymer composites reinforced with distinct types of fibers

Trindade¹,

Borges²,

Silva³

2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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Ceramic materials, such as geopolymers, have been increasingly used in civil construction as a compatible, green-friendly, and even more efficient alternative. They are obtained through the mixture of an aluminosilicate source, with an alkali solution, and its mechanical properties may vary according to its molar ratios, curing regimes and processing conditions. Geopolymers present compatible mechanical and durable responses, despite their characteristic brittle behaviour. Fiber reinforcement appear as an interesting solution to overcome this vulnerability. Particulate, discrete and textile forms of distinct fibers can be used as reinforcements, resulting in sustainable solutions (natural fibers) and even ultraductility performance (synthetic fibers). This study presents an experimental evaluation of distinct geopolymer composites reinforced with natural (sisal, jute and curauá) and synthetic fibers (PVA). The geopolymer mixture was produced with metakaolin in a sodium based solution. Compression, tensile and pull-out tests were performed. Scanning electron microscopy (SEM) was used to investigate the hardened geopolymer microstructure. Despite presenting distinct quantitative responses, all composites exhibited strain-hardening behaviour with multiple cracking formation.

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On the Durability Behavior of Natural Fiber Reinforced Geopolymers

Cited by 20 publications

References 14 publications

Iron-rich laterite-bagasse fibers based geopolymer composite: Mechanical, durability and insulating properties

Iron-rich laterite-bagasse fibers based geopolymer composite: Mechanical, durability and insulating properties

Durability of Cellulosic-Fiber-Reinforced Geopolymers: A Review

Mechanical response of geopolymer composites reinforced with distinct types of fibers

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