Effect of various amounts of aluminium oxy‐hydroxide coupled with thermal treatment on the performance of alkali‐activated metakaolin and volcanic scoria

Tiffo, Emmanuel; Belibi, Placide Désiré Belibi; Mbah, Jean Batiste Bike; Alomayri, Thamer; Pougnong, Thierry Ebenizer; Baenla, Jean; Elimbi, A.

doi:10.1016/j.sciaf.2021.e01015

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…This shows that the compressive strength of the specimens containing GP is strongly influenced by its content and size. In addition, Esmaeili et al [27] showed that strength depends on the parameter of the color of the glass, where glasses of green colors showed higher pozzolanic activity than others such as the white-colored GP used in the present study.…”

Section: Compressive Strengthmentioning

confidence: 47%

Physico-Mechanical and Durability Characterization of Eco-Ternary Cementitious Binder Containing Calcined Clay/Rice Husk Ash and Recycled Glass Powder

Nshimiyimana,

Tameghe,

Ramadji

et al. 2023

Materials

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The objective of this study is to determine the influence of recycled glass powder (GP) on the physico-mechanical behavior and durability of a ternary cementitious binder containing calcined clay_metakaolin (MK) or rice husk ash (RHA). Different mortars were produced and characterized in fresh and hardened states. Reference mortars were produced using 100% cement CEM II/B-L 42.5R and 70% CEM + 30% MK or RHA. Test mortars were produced with the substitution of the MK or RHA with the GP and keeping the rate of the substitution at 30%; i.e., in ratios of 20:10, 15:15, and 20:10 of MK/RHA:GP. The water/binder weight ratio was maintained at 0.5, and the consistency of all mortars was adjusted using an admixture (superplasticizer/binder weight ratio of 0.75%). The substitution of MK and RHA with GP reduces the water demand to achieve the normal consistency of pastes and therefore increases the workability of mortars containing both binders CEM+MK+GP and CEM+RHA+GP. The substitution of MK and RHA with GP slightly reduces the compressive strength for both binders. The water-accessible porosity slightly increases for the substitution of MK and reduces for the substitution of RHA with GP. The mass losses after acid attack slightly increase with the substitution with GP, lower for the MK than the RHA up to 15% GP, but it remained far below that of 100% CEM. The results show that the substitution of MK and RHA with GP can improve the physical properties and durability of the mortars compared with that of 100% CEM, but it slightly decreases the mechanical properties due to the low rate of the pozzolanic reactivity of the GP. Further studies should seek to understand the reactivity behavior of the GP at the microstructure scale and therefore improve the mechanical performance of GP based mortar.

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Section: Compressive Strengthmentioning

confidence: 47%

Physico-Mechanical and Durability Characterization of Eco-Ternary Cementitious Binder Containing Calcined Clay/Rice Husk Ash and Recycled Glass Powder

Nshimiyimana,

Tameghe,

Ramadji

et al. 2023

Materials

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“…In contrast, flash calcination produced finer, less agglomerated and potentially more reactive particles [16]. To improve the reactivity, some aluminosilicate sources, wastes or by-products, and metakaolin can be added to concrete [17,18]. G. Barone et al.…”

Section: Introductionmentioning

confidence: 99%

“…[17] showed that replacing 10-25% metakaolin with volcanic ash in the synthesis of activated alkali materials leads to an increase in compressive strength. Another study by E. Tiffo et al [18] showed that geopolymers based on metakaolin or alkali-activated volcanic slag can reach thermally stable products at 1150 °C with high compressive strengths. Similarly, Z.…”

Section: Introductionmentioning

confidence: 99%

Effect of mixing metakaolins: Methodological approach to estimate metakaolin reactivity

N'cho

Gharzouni

Jouin

et al. 2023

Ceramics International

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“…The observed role of these abrasive powders was, in most cases, to be that of an inert filler, even though in some cases limited reactivity was observed, specifically of the fine abrasion residues [ 16 ]. Moreover, there are some studies [ 18 , 19 ] that reported that reactive alumina forms when added to AAMs, exploiting the advantage of partial solutions in alkaline media.…”

Section: Introductionmentioning

confidence: 99%

Chemical and Mechanical Properties of Metakaolin-Based Geopolymers with Waste Corundum Powder Resulting from Erosion Testing

et al. 2022

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Alkali activated binders, based on an aluminosilicate powder that is activated by an alkaline solution, have been proven to encapsulate a wide number of different wastes, both in the form of liquids and solids. In this study, we investigated the effect that the addition of a spent abrasive powder, mainly composed of corundum grains (RC), had on the mechanical, physical, and chemical properties of metakaolin-based geopolymers. The waste was introduced into the geopolymer matrix as a substitute for metakaolin, or added as a filler to the geopolymeric paste. The 3D cross-linking of the geopolymer structure, with and without the presence of the corundum, was investigated via Fourier transform infrared spectroscopy, X-ray diffraction, and ionic conductivity measurements of the eluate that was produced after 24 h of immersion of the sample in water. The RC powder did not significantly modify the matrix reticulation but increased densification, as observed with scanning electron microscopy, and there was increased resistance to compression by 10 wt% addition of RC, and also when added to the paste as a filler at 20 wt%.

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Effect of various amounts of aluminium oxy‐hydroxide coupled with thermal treatment on the performance of alkali‐activated metakaolin and volcanic scoria

Cited by 8 publications

References 34 publications

Physico-Mechanical and Durability Characterization of Eco-Ternary Cementitious Binder Containing Calcined Clay/Rice Husk Ash and Recycled Glass Powder

Physico-Mechanical and Durability Characterization of Eco-Ternary Cementitious Binder Containing Calcined Clay/Rice Husk Ash and Recycled Glass Powder

Effect of mixing metakaolins: Methodological approach to estimate metakaolin reactivity

Chemical and Mechanical Properties of Metakaolin-Based Geopolymers with Waste Corundum Powder Resulting from Erosion Testing

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