Sustainable geopolymer composite reinforced with sisal fiber: Durability to wetting and drying cycles

Santos, Géssica Zila Batista dos; Oliveira, Daniel Passos de; Filho, João de Almeida Melo; Silva, Neliton Marques da

doi:10.1016/j.jobe.2021.102568

Cited by 21 publications

(10 citation statements)

References 28 publications

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“…SEM observations also supported that coir fibers removed from a 12-year-old house sample were undamaged. Similarly, Batista dos Santos et al [79] found a minor drop in the flexural strength of sisal fiber-reinforced geopolymer composites (sludge precursors generated in water treatment plants) when exposed to accelerated aging conditions, representing good durability to wetting-drying cycles.…”

Section: Degradation Of Cellulosic Fibers Caused By Weatheringmentioning

confidence: 95%

Degradation Kinetics and Durability Enhancement Strategies of Cellulosic Fiber-Reinforced Geopolymers and Cement Composites

Addis

Sendekie

Satheesh

2022

Advances in Materials Science and Engineering

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The need to overcome the low energy-absorbing response and low tensile strength of geopolymers and cementitious materials has motivated researchers to develop fiber-reinforced composites. Interestingly, natural cellulosic fibers provide exciting prospects for advancements in bio-based materials compared to synthetic fibers. Incorporating fibers in such binders offer a crack limiting effect by creating multiple cracks than forming one major crack, usually leading to improved toughness and tensile strength of the composites. However, their sensitivity in alkaline media and environmental fluctuations deteriorates their durability and reinforcing capacity in composites. Therefore, exploring suitable mitigation strategies for such drawbacks of natural fibers based on previous research work and figuring out the existing gaps for further developments is extremely important. In this paper, cellulosic fiber degradation in geopolymer and cement-based matrices and the respective remedial actions have been reviewed based on a comprehensive analysis of the available literature. The influence of fiber modification and matrix treatment on the durability and strength characteristics of such composites is thoroughly discussed. Finally, recommendations and suggestions for further research in the field are presented.

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Section: Degradation Of Cellulosic Fibers Caused By Weatheringmentioning

confidence: 95%

Degradation Kinetics and Durability Enhancement Strategies of Cellulosic Fiber-Reinforced Geopolymers and Cement Composites

Addis

Sendekie

Satheesh

2022

Advances in Materials Science and Engineering

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“…Plant fibers have been regarded to be excellent reinforcing elements for geopolymer matrices because geopolymerization occurs in high alkaline settings and lignocellulose fibers have a considerable tolerance to these conditions [ 110 , 111 ]; the addition of pozzolanic materials and alkaline activators in the composition of the geopolymer matrix act as specific fiber treatments [ 111 ]. Recent advances in the production of natural fiber-reinforced geopolymers as promising sustainable construction materials were reviewed by Silva et al [ 110 ] and Li et al [ 112 ]; a survey of successful reinforcements with natural fibers was reported, with a majority of the studies focusing on industrial by-products such as fly ash, ground-granulated blast furnace slag, construction and demolition wastes, and mine-tailings.…”

Section: Sustainability Of Diatomaceous Earth As a Concrete Productio...mentioning

confidence: 99%

“…Numerous investigations on geopolymeric composites reinforced with vegetable fibers have been published in the literature, including on cotton [ 114 , 115 , 116 ], bamboo [ 117 ], flax [ 118 , 119 ], sisal [ 111 , 116 , 120 , 121 , 122 , 123 ], coconut [ 120 ], and jute [ 110 ]. However, the interaction of vegetable fibers with a diatomaceous earth-based geopolymeric matrix has rarely been investigated.…”

Section: Sustainability Of Diatomaceous Earth As a Concrete Productio...mentioning

confidence: 99%

A Review on the Incorporation of Diatomaceous Earth as a Geopolymer-Based Concrete Building Resource

et al. 2022

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The development of geopolymer building composites at a lower cost with a smaller carbon footprint may lessen the growing concerns about global warming brought on by emissions of a critical greenhouse gas (CO2) paired with the high production costs in the cement sector. Diatomaceous earth, commonly used as an admixture or partial replacement of cement owing to its most effective pozzolanic properties, has been investigated as a precursor in geopolymer concrete development. Several studies have been examined to develop a greater understanding of its characterization, inclusion status, and impacts on the performance aspects of concrete. The literature review showed that using diatomaceous earth is one of the effective ways to create sustainable, insulating, lightweight building materials while minimizing the harmful economic and environmental effects of industrial solid wastes. However, since most studies have focused on its integration as a partial cement substitute or a replacement for fine aggregate, further research on diatomaceous earth-based clinker-free concrete is required. A lack of research on geopolymer concrete’s reinforcement with either natural or synthetic fibers, or a combination of the two, was also discovered. This review also showed that there has been remarkably little effort made towards theoretical property correlation modeling for predicting concrete performance. It is anticipated that the detailed overview presented herein will guide potential researchers in defining their future paths in the study area.

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“…[40], along with workability in the fresh state [58,60,61], altogether have established them as promising construction materials as a substitute of OPC-composites. Furthermore, on account of adequate mechanical attributes in hardened conditions [55,58,59,62], and brilliant performances in the context of durability [41,42,56,58], geopolymer composites have proved themselves as a possible emerging green replacement of ordinary Portland cement [63][64][65][66][67][68][69][70][71][72][73][74]. The process of geopolymerization includes the use of alkaline solutions to activate minerals of geological origin like metakaolin or industrial by-products such as fly ash that is desirably rich in alumina and silica, producing a three-dimensional (3D) polymeric structures which sustain load-mechanics.…”

Section: Geopolymeric Materialsmentioning

confidence: 99%

Review on Performance Evaluation of Autonomous Healing of Geopolymer Composites

Luhar

Shaikh

2021

Infrastructures

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It is a universal fact that concrete is one of the most employed construction materials and hence its exigency is booming at a rocket pace, which in turn, has resulted in a titanic demand of ordinary Portland cement. Regrettably, the production of this essential binder of concrete is not merely found to consume restricted natural resources but also found to be associated with emission of carbon dioxide—a primary greenhouse gas (GHG) which is directly answerable to earth heating, resulting in the gigantic dilemma of global warming. Nowadays, in order to address all these impasses, researchers are attracted to innovative Geopolymer concrete technology. However, crack development of various sizes within the concrete is inevitable irrespective of its kind, mix design, etc., owing to external and internal factors viz., over-loading, exposure to severe environments, shrinkage, or error in design, etc., which need to be sealed otherwise these openings permits CO2, water, fluids, chemicals, harmful gases, etc., to pass through reducing service life and ultimately causing the failure of concrete structures in the long term. That is why instant repairs of these cracks are essential, but manual mends are time-consuming and costly too. Hence, self-healing of cracks is desirable to ease their maintenances and repairs. Self-healing geopolymer concrete (SHGPC) is a revolutionary product extending the solution to all these predicaments. The present manuscript investigates the self-healing ability of geopolymer paste, geopolymer mortar, and geopolymer concrete—a slag-based fiber-reinforced and a variety of other composites that endow with multifunction have also been compared, keeping the constant ratio of water to the binder. Additionally, the feasibility of bacteria in a metakaolin-based geopolymer concrete for self-healing the cracks employing Bacteria-Sporosarcina pasteurii, producing Microbial Carbonate Precipitations (MCP), was taken into account with leakage and the healing process in a precipitation medium. Several self-healing mechanisms, assistances, applications, and challenges of every strategy are accentuated, compared with their impacts as a practicable solution of autogenously-healing mechanisms while active concretes are subjected to deterioration, corrosion, cracking, and degradation have also been reviewed systematically.

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Sustainable geopolymer composite reinforced with sisal fiber: Durability to wetting and drying cycles

Cited by 21 publications

References 28 publications

Degradation Kinetics and Durability Enhancement Strategies of Cellulosic Fiber-Reinforced Geopolymers and Cement Composites

Degradation Kinetics and Durability Enhancement Strategies of Cellulosic Fiber-Reinforced Geopolymers and Cement Composites

A Review on the Incorporation of Diatomaceous Earth as a Geopolymer-Based Concrete Building Resource

Review on Performance Evaluation of Autonomous Healing of Geopolymer Composites

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