Powdered banana peel in calcined halloysite replacement on the setting times and engineering properties on the geopolymer binders

Nemaleu, Juvenal Giogetti Deutou; Kaze, Cyriaque Rodrigue; Tomé, Sylvain; Alomayri, Thamer; Assaedi, Hasan; Kamseu, Elie; Melo, Uphie Chinje; Sglavo, Vicenzo Maria

doi:10.1016/j.conbuildmat.2021.122480

Cited by 33 publications

(11 citation statements)

References 40 publications

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“…It is worthy to mention that the mean pore diameter of porous Ni 50 SH 50 foam should be increased due more evaporation of space holding materials. However, similar phenomenon observed for other ceramic materials which can be ascribed to the densification of the body promoting partial removal of porosity at high temperatures [34,35]. 6(d)).…”

Section: Characterization Of Porous Ni-nio Foamsupporting

confidence: 76%

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Sarker

Rahman

et al. 2021

Trends Sci

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Despite the importance of Nickel Oxide (NiO) in diverse functional applications, very little information is available on the mechanical properties of bulk or porous NiO or, mostly unnoticed. In this study, porous Ni-NiO foam was synthesized using space holding-powder metallurgy and sintering methods to produce opened-cell structure with macrogravel and Neolamarckia cadamba (Cadamba flower) like surface morphology. Four different types of porous Ni-NiO with different pore diameter of 35.65 ± 12.77, 36.10 ± 8.85, 68.20 ±7.36 and 62.45 ± 17.48 µm were fabricated for evaluating the effect of porosity on the mechanical properties of bulk porous Ni-NiO foam. The mechanical properties such as bulk crushing force of as synthesized Ni-NiO foam with various porosities such as 20.55, 27.35, 27.85 and 28.82 % exhibited the average crushing load of 115.40, 39.95, 138.10 and 151.20 N, respectively. This study suggests that crushing load of Ni-NiO foam is not only depending on the porosity but also on the sintering temperature and crystallite sizes of NiO. HIGHLIGHTS Ni-NiO foam is synthesized using space holding-powder metallurgy and sintering methods Different pore diameter is fabricated for evaluating the effect of porosity on the mechanical properties of bulk porous Ni-NiO foam Crushing strength of Ni-NiO foam is not only depending on the porosity but also on the sintering temperature and crystallite sizes of NiO GRAPHICAL ABSTRACT

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Section: Characterization Of Porous Ni-nio Foamsupporting

confidence: 76%

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Sarker

Rahman

et al. 2021

Trends Sci

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“…After investigation they observed that using limestone up to 45 wt.% was beneficial for the strength development of synthesized geopolymer. Nemaleu et al [20] replaced calcined laterite with powdered banana peel up to 20 wt.% and found that a compressive strength of 45 MPa was achieved with 10 wt.%. Is this part on fillers important?…”

Section: Introductionmentioning

confidence: 99%

Reactivity and mechanical performance of geopolymer binders from metakaolin/meta-halloysite blends

Kaze

Jiofack

Cengiz

et al. 2022

Construction and Building Materials

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“…4. However, the increase in setting time with an increase in the alkaline solution to calcined halloysite ratio beyond 0.6 is due to the increased content of Na 2 O, which enriches the entire system and may delay the setting time, as reported previously by other researchers using different source aluminosilicate materials [8, 14,28,29,35,38]. Hence, this would have hindered the polymerisation or polycondensation step during the geopolymerisation reaction, even though the utilisation of a high quantity of alkaline activating solution promoted high dissolution of reactive Al 2 O 3 and SiO 2 in the solid precursor [39,40].…”

Section: Fresh Propertiesmentioning

confidence: 74%

“…Geopolymeric products are obtained at low temperatures (≤ 100°C) by alkaline activation of an aluminosilicate rich material with a concentrated basic solution [4,5]. Since their discovery, various materials have been used in the development of new cementitious binders, including y ash, slag, waste by-products that contain alumina and silica, volcanic scoria, metakaolin, meta-halloysite (MH), and laterite soil [6][7][8][9][10][11][12][13][14][15]. Existing literature on geopolymer product development reveals that geopolymeric products exhibit better or similar mechanical performance, thermal stability, and better acidic and resistance to salt attack compared to ordinary Portland cement (OPC) [12,[15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Microstructural Properties of Meta-Halloysite-Based Geopolymer Mortars Cured at Room Temperature

Kaze

Cengiz

Jiofack

et al. 2022

Preprint

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In this study, meta-halloysite (MH) mixed with an alkaline solution(8, 10, and 12 M) was used as a binder phase to produce geopolymer mortars with alkaline solution/MH ratios of 0.6, 0.7, and 0.8. The flow slump behaviour, setting time, and mechanical properties of the end products were studied at room temperature. The microstructural properties of the geopolymer mortars were evaluated using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy. The results indicated that the cohesion between the geopolymer binder and quartz sand aggregates improved with an increase in the molarity and alkaline solution/meta-halloysite ratio from 0.6 to 0.8. The corresponding slump and flow values increased from 25 to 118 mm, 14 to 115 mm, and 12 to 102 mm, whereas the setting time increased from 77 to 163 min, 54 to 140 min, and 35to 121 min,respectively, with an increase in the alkaline solution concentration. Increasing the alkaline solution/MH ratio (from 0.6 to 0.8) improved the dissolution of the solid precursor and produced a sufficient amount of geopolymer,ensuring the formation of a dense and compact structure with few accessible voids, thus justifying the reduction in water absorption and porosity. A similar trend was observed in the compressive, flexural, and tensile strengths, which increased with the alkaline activator/solid precursor and curing time (7 and 28 days). The geopolymer mortar samples prepared using 0.8 and 12 M NaOH developed high compressive strength (65 MPa), lower porosity, and lower water absorption.

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Powdered banana peel in calcined halloysite replacement on the setting times and engineering properties on the geopolymer binders

Cited by 33 publications

References 40 publications

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Reactivity and mechanical performance of geopolymer binders from metakaolin/meta-halloysite blends

Mechanical and Microstructural Properties of Meta-Halloysite-Based Geopolymer Mortars Cured at Room Temperature

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