Experimental Investigations and Prediction of Thermal Behaviour of Ferrosialate-Based Geopolymer Mortars

Reddy, Yeddula Bharath Simha; Karthiyaini, S.

doi:10.1007/s13369-019-04314-7

Cited by 22 publications

(8 citation statements)

References 41 publications

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“…Stage one (S1) was located between 0 to 120 °C. The weight loss in this stage was associated with the evaporation of the free water presented on the surface and porosity of the specimens [34,35]. The second stage (S2) was located between 120 to 230 °C.…”

Section: Thermal Stabilitymentioning

confidence: 97%

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Sustainable alkali-activated binders with municipal solid waste incineration ashes as sand or fly ash replacement

Irshidat

Al‐Nuaimi

Rabie

2022

J Mater Cycles Waste Manag

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The present study investigates the feasibility of using two types of municipality solid wastes incineration ashes, namely, fly ash and bottom ash in the production of sustainable alkali-activated binder. The ashes are collected from the incineration plant and characterized to determine their particle size distribution, specific gravity, chemical composition, and heavy metals content. The ashes are then used as either fly ash or sand replacement with five replacement ratios 0%, 5%, 10%, 15%, and 20% to produce the binder. The produced binder are characterized in terms of strength, workability, density, water absorption, thermal conductivity and stability, chemical composition, and heavy metals content. The results reflect the ability of producing sustainable alkali-activated binder with small dosage of MSWI ashes as either fly ash or sand replacement without negatively affecting its strength, workability, density, and water absorption. The ashes enhance the thermal insulation capability of the binder.

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Section: Thermal Stabilitymentioning

confidence: 97%

“…Another weight loss was captured between 630 and 730 °C (S4). This weight loss could be attributed to the dehydroxylation and recrystallization of geopolymer specimens [35].…”

Section: Thermal Stabilitymentioning

confidence: 99%

Sustainable alkali-activated binders with municipal solid waste incineration ashes as sand or fly ash replacement

Irshidat

Al‐Nuaimi

Rabie

2022

J Mater Cycles Waste Manag

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“…Material development has started from "materials by design" in the early 21st century, which involves in-depth knowledge of microscopic origins and later into processing that leads to new advanced materials. "Materials by design" or experimental work of geopolymers have been reported countless times (Zhang and Lu, 2018;Ren and Zhang, 2019;Yao et al, 2019;Cui et al, 2020;Yeddula and Karthiyaini, 2020). The optimum approach available to scientific research is to combine theory, experiment, and simulation (Landau, 2005).…”

Section: Analytical Modeling Aspects Of Graphene Reinforced Geopolymer Nanocompositesmentioning

confidence: 99%

Mechanical Strength of Graphene Reinforced Geopolymer Nanocomposites: A Review

Tay

Mazlan

2021

Front. Mater.

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The emergence of high-strength graphene marks a new milestone in the material science field. With only a small percentage inclusion into the matrix system, this organic nanoparticle could tremendously improve the strength in vast arrays of composites. At the same time, there is a growing interest in using the low-cost, lightweight, and high early strength geopolymer as the new binder for concrete. Compared to the traditional Ordinary Portland Cement (OPC), geopolymer emits 80% less CO2 during its production while exerting similar strength. Thus, the geopolymer has the potential to commercialize as new and green concrete. Geopolymer is a mixture of aluminosilicate powders and alkaline solutions. When incorporated with nano-sized graphene, the material forms a composite known as Graphene Reinforced Geopolymer Nanocomposite (GRGN). The addition of graphene enhances the strength of geopolymer, which can further improve its competitiveness. However, this depends on several factors, including the types of graphene, the surface modification of graphene, and the concentration of alkaline solutions. Generally, the presence of graphene alters the porous structure of geopolymer into a substantially filled porous structure, thus increasing compressive strength and flexural strength. On the other hand, Graphene Oxide (GO) undergoes a chemical reduction in the alkaline solution, producing epoxy functional groups. The chemical treatment results in two conditions which are weak interaction between graphene and geopolymer matrix, and better graphene dispersibility in geopolymer matrix. This review also highlights the analytical modelling aspect of GRGN. The dissolution of Si(OH)4 and Al(OH)4- from the aluminosilicate source was consistent with experimental work and analytical modeling, while the dissolution of Si–OH on the surface-modified graphene indicated otherwise. Therefore, this paper will provide an insightful review of the GRGN mechanical properties.

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“…Recently, research has focused on developing alternative materials to OPC due to environmental and energy concerns [10][11][12]. One promising alternative to OPC is geopolymer material, which uses raw materials rich in aluminosilicate content and an alkaline solution to activate it [13][14][15][16]. Most of the geopolymer synthesis methods occur in this process.…”

Section: Introductionmentioning

confidence: 99%

Production and characterization of heat retardant fiber-reinforced geopolymer plates

GEZER

AKARKEN

Cengiz

2022

Journal of Sustainable Construction Materials and Technologies

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This paper presents an alternative environment-friendly thermal insulation material for the construction industry. We aimed to produce this building material with superior heat resistance properties and comparable strength to the concrete produced with Ordinary Portland Cement. The primary purpose of the experimental studies is to produce a basic geopolymeric plate and to add cellubor and polypropylene fibers to the geopolymeric mortar. In the next stage, fiber-reinforced plates were prepared, thermal experiments were carried out, and discussions and conclusions were formed according to the results and findings. This study initially produced different types of fiber-based metakaolin plates with high heat resistance. Then, the flame test examined the heat resistance of the composite plates formed by the mixture of fibers consisting of cellubor, polypropylene, and cellubor + polypropylene fiber mixtures into geopolymeric mortars. It was found that the metakaolin plates containing approximately 6% by weight of Cellubor in the structure, besides their serious resistance to flame, their heat retardancy properties gave 72% better results than Kalekim (cementitious ceramic tile adhesive) plates and 55% better results than non-fiber metakaolin plates.

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Experimental Investigations and Prediction of Thermal Behaviour of Ferrosialate-Based Geopolymer Mortars

Cited by 22 publications

References 41 publications

Sustainable alkali-activated binders with municipal solid waste incineration ashes as sand or fly ash replacement

Sustainable alkali-activated binders with municipal solid waste incineration ashes as sand or fly ash replacement

Mechanical Strength of Graphene Reinforced Geopolymer Nanocomposites: A Review

Production and characterization of heat retardant fiber-reinforced geopolymer plates

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