Effect of physicochemical characteristics on the use of clays from Kindia (Guinea) in ceramic compositions

Balde, Mamadou Yaya; Djangang, Chantale Njiomou; Bah, Aissatou Kenda; Blanchart, Philippe; Njopwouo, D.

doi:10.1111/ijac.13669

Cited by 6 publications

(11 citation statements)

References 23 publications

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“…In general bauxite exhibits interesting thermal behaviour and low firing shrinkage, which does not exceed 3.2% at 1200˚C for the studied sample. Consequently, bauxite can be used for manufacturing dense ceramics having enhanced dimensional stability [42]. Besides, some of the properties of the studied sample are supposed to be beneficial in different sectors as for cementitious and geopolymer additives.…”

Section: Discussionmentioning

confidence: 99%

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Physicochemical Characterisation for Potential Uses as Industrial Mineral of Bauxite from Débélé, Guinea

Balde¹,

Djangang²,

Diallo³

et al. 2021

MSCE

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Assessing the potential uses as industrial mineral, bauxite from Débélé, Guinea, has been characterised by chemical and mineralogical analyses, the determination of the amorphous content, the rate of portlandite consumption in an aqueous solution, the strength activity index, and the thermal behaviour up to 1200˚C. It was evidenced that the raw sample is gibbsite-rich type bauxite with about 45.06 wt% of alumina, 23.80 wt% of iron oxide, and 1.74 wt% of silica. It meets the chemical composition required for bauxites used for refractory cement. During heating, the raw bauxite undergoes high densification with low linear shrinkage, motivating a potential use in dense ceramic compositions with high thermal stability. Also, the heating at only 600˚C gives a significant pozzolanic activity in combination with Portland cement. The correlation between the pozzolanicity, the amorphous phase content, and the specific surface area indicated that the raw and the calcined materials present an interesting reactivity for using them in alternative cement formulations.

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Section: Discussionmentioning

confidence: 99%

“…The overall thermal transformation of the bauxite sample at 1200˚C, lead to a total linear shrinkage of 3.2%. This relatively low value indicates that the studied bauxite is suitable in manufacturing dense ceramics, for specific applications requiring dimensional stability [12] [42].…”

Section: Sintering Behaviormentioning

confidence: 99%

Physicochemical Characterisation for Potential Uses as Industrial Mineral of Bauxite from Débélé, Guinea

Balde¹,

Djangang²,

Diallo³

et al. 2021

MSCE

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“…In this way, the particles size distribution of the final fraction of the enriched clay fraction (ECF) was controlled [42].…”

Section: Materials and Samplingmentioning

confidence: 99%

“…Where 𝐹 𝐶 = 24 was the conversion factor and 𝑉 𝐵 is the methylene blue value of the sample under study and determined by the Eq. ( 3) [42] 𝑉 𝐵 = 𝑉 𝑀𝐵 𝑀 × 100…”

Section: Characterization Of Compositesmentioning

confidence: 99%

Low-cost pathways to synthesize silica-smectite clay-based composites

Kepdieu

Djangang

Njimou

et al. 2023

Preprint

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The present study aimed at using rice husk as a natural silica precursor in the fabrication of silica-smectite composites. A local smectite clay was respectively mixed with 1) silica sludge from rice husk ashes after an acid treatment, 2) an aqueous sodium silicate solution from alkaline dissolution of silica sludge and 3) a nanosilica powder obtained after hydroxylation/polymerisation of a sodium silicate solution. Products from the three different synthesis pathways were investigated by XRD, infrared spectrometry, SEM/EDX and BET specific surface measurement. They show a heterogeneous morphology where the distribution of silica particles in the clay matrix change with each synthesis pathway. For silica sludge synthesis pathway, a predominated three-dimensional-like structure with a phyllosilicate matrix skeleton was obtained. For the pathway using a silicate solution, we obtained an amorphous compound having a limited intergranular cohesion and containing silicate agglomerates that are intercalated between clay sheets. It is different for the nanosilica reinforced pathway that led to a packed morphology with a regular distribution of silica phases in the clay matrix. In all the synthesized composites, we observe the occurrence of amorphous silica phases that favours both the existence of porosity and the presence of chemically active sites. Consequently, obtained products are potential multifunctional materials.

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“…Clays are among the most abundant materials on the Earth's surface [1,2]; thus, they are the most commonly used raw materials for construction ceramics, such as bricks and roof tiles [3][4][5][6]. Despite the introduction of newly developed materials in the construction industry, traditional clay ceramics are still widely used [7] and are considered the foundation of this sector [8].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Mining: Reuse of Clay from Abandoned Areas in the South of Brazil for Ceramic Production Based on a Simplex Design

Saviatto,

Zaccaron,

Nandi

et al. 2023

Materials

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The environmental impact of clay mining can be minimized using extractive mineral circularity practices. Combining the available knowledge of the characteristics of different clays with statistical tools was a decisive step for the improved use of mining resources. Through blends, all the mined materials can be incorporated to produce quality ceramic products. This study identified two types of clay from abandoned mining areas in the southern state of Santa Catarina, Brazil. These raw materials were valued together with plastic clay, which is widely used in the region, to develop 10 different formulations using a mixture design method. The clays were characterized using average granulometric distribution, mineralogical composition, and chemical, thermal and plasticity analyses. The specimens were shaped by extrusion, dried in an oven, fired in a muffle furnace and characterized based on their shrinkage, water absorption and compressive strength values. Two clays with varying characteristics—one with low workability and the other with a high silica content—exhibited difficulties (generating defects) in the extrusion shaping process, which compromised the final quality of the ceramic paste. Results showed that incorporating up to 45% by mass of the low-workability clay resulted in an increase in water absorption. The more siliceous clay improved dimensional control; however, its use at high contents (~80%) decreased the mechanical resistance. Nevertheless, when used in controlled amounts, these clays can be beneficial to the production of blocks and bricks because they have the potential to improve some properties of the finished ceramic products.

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Effect of physicochemical characteristics on the use of clays from Kindia (Guinea) in ceramic compositions

Cited by 6 publications

References 23 publications

Physicochemical Characterisation for Potential Uses as Industrial Mineral of Bauxite from Débélé, Guinea

Physicochemical Characterisation for Potential Uses as Industrial Mineral of Bauxite from Débélé, Guinea

Low-cost pathways to synthesize silica-smectite clay-based composites

Sustainable Mining: Reuse of Clay from Abandoned Areas in the South of Brazil for Ceramic Production Based on a Simplex Design

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Effect of physicochemical characteristics on the use of clays from Kindia (Guinea) in ceramic compositions

Cited by 6 publications

References 23 publications

Physicochemical Characterisation for Potential Uses as Industrial Mineral of Bauxite from D&#233;b&#233;l&#233;, Guinea

Physicochemical Characterisation for Potential Uses as Industrial Mineral of Bauxite from D&#233;b&#233;l&#233;, Guinea

Low-cost pathways to synthesize silica-smectite clay-based composites

Sustainable Mining: Reuse of Clay from Abandoned Areas in the South of Brazil for Ceramic Production Based on a Simplex Design

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Physicochemical Characterisation for Potential Uses as Industrial Mineral of Bauxite from Débélé, Guinea

Physicochemical Characterisation for Potential Uses as Industrial Mineral of Bauxite from Débélé, Guinea