Characterization of clay deposit in the central region of Piauí for use in the ceramic industry

Almeida, Kelson Silva de; Soares, Roberto Arruda Lima; Matos, José Milton Elias de

doi:10.1590/s1517-707620200004.1164

Cited by 5 publications

(11 citation statements)

References 35 publications

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“…The quartz present in the clay is a component that acts as a non-plastic and inert raw material during the firing process (Racanelli et al, 2020). Orthoclase is the main raw material used as flux and provides great benefits to the ceramic mixture (Almeida et al, 2020). Therefore, the mineralogical analysis is in agreement with the chemical analysis.…”

Section: Figure 4 -X-ray Diffraction Pattern Of the Claysmentioning

confidence: 62%

“…The presence of fluxing oxides such as CaO, MgO, K2O and Fe2O3 contributes to the firing stage by promoting the formation of liquid phase necessary for particle consolidation, decreasing porosity and increasing linear firing shrinkage (Almeida et al, 2020;Cipriano & Ferraz, 2019;Racanelli et al, 2020). The high K2O content of the clays under study favors densification and provides mechanical strength to red ceramics (Nicolite, 2017;Silva et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

“…Figure 9 shows the macro-structural analysis, which is necessary to determine the possible visible cracks and fissures and to analyze the coloration of the sample (Almeida et al, 2020). The figures show the specimens from leaving the oven at 105°C to firing at 1000°C.…”

Section: Figure 4 -X-ray Diffraction Pattern Of the Claysmentioning

confidence: 99%

“…The study by Pinto et al (2021) showed that the clay sample is suitable for application in roof tiles and hollow bricks. Almeida et al (2020) demonstrated the potential deposits of kaolinite clays from the central region of Piauí (Oeiras/PI) for application in the local ceramic industry.…”

Section: Introductionmentioning

confidence: 97%

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Caracterização físico-química, mineralógica e tecnológica de argilas de Caxias/MA

Magalhães¹,

Almeida²,

Gomes³

2022

J. Eng. Exact Sci.

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Este trabalho visa caracterizar uma mistura de argilas utilizadas na fabricação de tijolos na região de Caxias/MA. Foram realizadas ensaios de composição química, difração de raios X, análise térmica (TG/DTG), análise granulométrica e plasticidade. Além disso, foram determinadas propriedades tecnológicas tais como absorção de água, porosidade aparente, densidade aparente e resistência à flexão. Corpos de prova (15x2,5x1,5 cm) foram moldadas por extrusão e queimadas a três temperaturas, 800, 900 e 1000°C. Em termos de mineralogia, as amostras são argilas cauliniticas e ilíticas. Os resultados mostraram que a formulação estudada é adequada para a aplicação em alvenaria de vedação. Assim, as amostras de argila têm potencial para várias aplicações (tijolos, telhas, entre outras) como matéria-prima para a indústria da cerâmica vermelha no estado do Maranhão.

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Section: Figure 4 -X-ray Diffraction Pattern Of the Claysmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Section: Figure 4 -X-ray Diffraction Pattern Of the Claysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Caracterização físico-química, mineralógica e tecnológica de argilas de Caxias/MA

Magalhães¹,

Almeida²,

Gomes³

2022

J. Eng. Exact Sci.

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“…To this end, many works investigated including dimension stone residues in red ceramics products [6][7][8][9][10][11][12][13]. The term 'red ceramic' includes several products with clays that contain iron oxides and hydroxides, responsible for the reddish color of the pieces after firing.…”

Section: Introductionmentioning

confidence: 99%

The influence of compositional variability of dimension stone residues on the properties of rustic porous ceramic tiles

et al. 2023

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This study analyzed how the compositional variability of dimension stone residues influences the characteristics of rustic porous ceramic tiles. The specimens were prepared by adding 20 wt% of dimension stone residue to the clay and sintered at 1000 °C for 1 h. The testing assays performed were physical properties and structural analysis through scanning electron microscopy. The results indicate that water absorption was lower (~9% to 14%) in samples containing silicate residues compared to carbonate residues (~16%). Apparent porosity of ~21% to 25% and shrinkage of 0.5% to 1.6% were measured in silicate samples while higher apparent porosity of ~30% and expansion of -0.04% were found in carbonate samples. Flexural strength and modulus of rupture were similar, ~16 MPa and ~330 N, respectively, for both sample sets. The samples containing silicate residues whose SiO 2 content was between 48% and 58% and the sum of alkaline and alkaline earth oxides was less than 18% were suitable for manufacturing rustic porous ceramic tile, while residues with high SiO 2 or carbonate contents impaired the properties of the ceramic bodies. Therefore, it is recommended that the dimension stone residues intended for use in ceramic tiles be previously separated according to chemical and mineralogical characteristics.

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Passive of CRFS Technology in Soil-Cement Application

2023

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In Brazil, with the ban on the production, sale, and use of chrysotile asbestos, the sector’s industry opted to replace asbestos with CRFS Technology—Cement Reinforced with Synthetic Wire (fiber cement); that is, another product to be disposed of in landfills. This work aimed to determine a composite based on clay, fiber cement powder, and cement that meets the technical specifications of Brazilian soil–cement application standards to contribute to a more sustainable treatment of the future disposal of fiber cement products. With the characterization analysis of the materials, we identified that the clay granulometry is heterogeneous and distributed from 0.1 µm to 25 µm. In comparison, 75% of the fiber cement powder has grains greater than 10 µm. For clay, the liquidity limit is 39.67%, the plasticity limit is 25.01%, and the plasticity index is 14.66%. In the semiquantitative chemical analysis, silicon oxide (SiO2) and calcium oxide (CaO) stood out as the main oxides found, reflected in the mineralogy as quartz and calcium silicate. Therefore, we identified the percentage of organic matter in clay at 2%, using the result of the thermogravimetric analysis. The results described met the normative parameters foreseen for soil–cement applications. That said, the technological characterization was carried out by tests of linear retraction, water absorption, and simple mechanical compression on the specimens made under an axial pressure of 31.2 Mpa in the formulations defined in this work. The formulations with 10% cement and 20% and 30% fiber cement powder are suitable for use in soil–cement bricks, as they have volumetric shrinkage percentages from 2% to 2.5%, water absorption ranging from 18.66% to 19.39%, and simple compressions from 4.25 Mpa to 6.88 Mpa, meeting the requirements of Brazilian standards for soil–cement applications. It is concluded that the results showed that it is possible to produce soil–cement bricks with passive fiber cement products converted into powder, avoiding improper disposal and unwanted environmental impacts.

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Characterization of clay deposit in the central region of Piauí for use in the ceramic industry

Cited by 5 publications

References 35 publications

Caracterização físico-química, mineralógica e tecnológica de argilas de Caxias/MA

Caracterização físico-química, mineralógica e tecnológica de argilas de Caxias/MA

The influence of compositional variability of dimension stone residues on the properties of rustic porous ceramic tiles

Passive of CRFS Technology in Soil-Cement Application

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