Physical and mechanical properties of ceramics from clays of the west of S. Paulo State, Brazil

Teixeira, Silvio Rainho; Souza, S. A. de; Nobre, Marcos Augusto Lima

doi:10.1590/s0366-69132004000300015

Cited by 10 publications

(9 citation statements)

References 2 publications

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“…Mica (10.01 and 4.99 Å), quartz (4.26 and 3.34 Å), gibbsite (4.85 Å), goethite (4.18 Å), lepidocrocite (6.30Å), and probably montmorillonite (∼12.5 Å), a 2:1 clay mineral are the minor phases 25 . This mineralogical composition is common to clays from this region 26,27 . Mica and gibbsite increase the K and Al concentrations in the sample, respectively.…”

Section: Resultsmentioning

confidence: 59%

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Sugarcane Bagasse Ash as a Potential Quartz Replacement in Red Ceramic

Teixeira

Souza

Santos

et al. 2008

Journal of the American Ceramic Society

121

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Sugarcane bagasse ash (SCBA) is an industrial waste that contains silicon and aluminum oxides as the major components and iron, calcium, magnesium, and potassium oxides as the main minor components. In this paper, SCBA from one Brazilian factory was characterized and tested for its influence on the ceramic properties of clay/ash ceramic probes. Prismatic probes were pressed (18 MPa) using a ceramic mass mixed with 0%, 5%, 8%, and 10% ash. The probes were fired at temperatures between 800° and 1200°C. X‐ray diffraction, X‐ray fluorescence, thermal analysis (differential thermal analysis, thermogravimetric analysis/differential thermogravimetric analysis), and tests for texture (particle‐size analysis), flexural strength, and linear shrinkage were carried out to characterize the samples. The results showed that the amount of ash to be incorporated will depend on mainly the composition of clay but also ash, and indicated that the clay used in this work can incorporate up to 10% weight of ash to produce solid bricks. The results also showed an improvement in ceramic/ash properties up to sintering temperatures higher than 1000°C.

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Section: Resultsmentioning

confidence: 59%

“…25 This mineralogical composition is common to clays from this region. 26,27 Mica and gibbsite increase the K and Al concentrations in the sample, respectively. Titanium, iron, phosphorus, and other compounds act as nucleating agents in glassceramic formation.…”

Section: Resultsmentioning

confidence: 88%

Sugarcane Bagasse Ash as a Potential Quartz Replacement in Red Ceramic

Teixeira

Souza

Santos

et al. 2008

Journal of the American Ceramic Society

121

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“…The specified values of water absorption (WA) and mechanical resistance ( ) for kaolinitic materials [44] are: dense bricks (WA < 25% and ≥ 2.0 MPa), ceramic blocks (WA < 25% and ≥ 5.5 MPa) and roofing tiles (WA < 20% and ≥ 6.5 MPa). Low flexural strength values disqualify the raw material for ceramic uses [45]. The results show that dense brick and ceramic block specifications were achieved up to 1000 • C, while roofing tile specifications are attained only at 1100 • C for all mixtures.…”

Section: Technological Propertiesmentioning

confidence: 90%

The Ndop plain clayey materials (Bamenda area – NW Cameroon): Mineralogical, geochemical, physical characteristics and properties of their fired products

Yongue-Fouateu

Ndimukong

Njoya

et al. 2016

Journal of Asian Ceramic Societies

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a b s t r a c tThe physicochemical, mineralogical and technological properties of clayey materials from the Ndop plain (NW Cameroon) have been investigated, for their ceramic applications. The clayey materials have mixed facies with colour ranging from brown, grey, mottled and yellowish brown. The thickness of the exploitable clay layer is more than 5 m. Their mineralogical constituents are quartz, kaolinite, illite and feldspars, with kaolinite as major clay mineral. Based on the geochemistry, their source rocks might be felsic, with a mafic rock inference. These materials display high percentage in fine particles and high Atterberg limits. For all the firing temperatures, flexural strength (1.2-11 MPa), water absorption (8.03-24.27%), linear shrinkage (2.10%), weight loss (4.88-16.54%) and bulk density (1.57-2.03 g/cm 3 ) indicate good ceramic properties for firing samples between 900 and 1100 • C. Most of the fired test bricks show a brick red colour with good to very good cohesion. The studied clays were thus, suitable as raw materials for roof tiles, light weight blocks and hollow bricks; however, mixing of high clayey and highly silty materials could improve the quality of the products.

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“…Existe extensa literatura sobre as características e propriedades tecnológicas de argilas brasileiras usadas na fabricação de cerâmica vermelha [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Verifica-se que na maioria dos trabalhos se busca basicamente determinar se uma determinada matéria-prima argilosa está apta ou não para fabricação de cerâmica vermelha para construção civil.…”

Section: Introductionunclassified

Efeito da temperatura de queima em algumas propriedades mecânicas de cerâmica vermelha

Pinheiro

Holanda

2010

Cerâmica

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ResumoO objetivo deste trabalho foi avaliar algumas propriedades mecânicas de cerâmica vermelha como uma função da temperatura de queima. A massa argilosa usada foi caracterizada por meio da determinação da composição química, difração de raios X, distribuição do tamanho de partícula, morfologia, plasticidade e comportamento dilatométrico. Foram conformadas peças cerâmicas por prensagem uniaxial e queimadas a 850 ºC, 950 ºC e 1050 ºC. As peças queimadas foram avaliadas em termos de tensão de ruptura a flexão, módulo de elasticidade flexural, parâmetro de Weibull, tensão característica, massa específica aparente, absorção de água e área superficial específica. A evolução da microestrutura foi acompanhada via microscopia eletrônica de varredura e difração de raios X. Os resultados mostram que a temperatura de queima influencia diretamente nas propriedades mecânicas de cerâmica vermelha. Uma quantidade significativa de poros abertos foi eliminada, principalmente para temperaturas acima de 950 ºC. Os dados de tensão de ruptura a flexão resultaram em distribuição de Weibull, cujos parâmetros de Weibull estão compreendidos na faixa 8,59 -12,42. Palavras-chave: cerâmica vermelha, propriedades mecânicas, porosidade. Efeito da temperatura de queima em algumas propriedades mecânicas de cerâmica vermelha (Effect of the firing temperature on some mechanical properties of red ceramic) Abstract The aim of this work was to evaluate some mechanical properties of red ceramic as a function of the firing temperature. The clayey mass was characterized in terms of chemical composition, X-ray diffraction

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Physical and mechanical properties of ceramics from clays of the west of S. Paulo State, Brazil

Cited by 10 publications

References 2 publications

Sugarcane Bagasse Ash as a Potential Quartz Replacement in Red Ceramic

Sugarcane Bagasse Ash as a Potential Quartz Replacement in Red Ceramic

The Ndop plain clayey materials (Bamenda area – NW Cameroon): Mineralogical, geochemical, physical characteristics and properties of their fired products

Efeito da temperatura de queima em algumas propriedades mecânicas de cerâmica vermelha

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