A preliminary case study of potential ceramic raw materials in the Aileu area of Timor Leste

Lisboa, J. Vítor; Carvalho, Jorge M. F.; Oliveira, Alexandre Passos; Carvalho, Camila Carolina de; Grade, José

doi:10.1016/j.jseaes.2006.04.003

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…Their use could also be considered in the manufacture of ceramic tiles; therefore, it is important to know the reaction of such mixtures at other firing temperatures and with other types of clay raw materials. One of the most important properties that make these mixtures suitable for industrial manufacture is the plastic behaviour, which reflects the workability and extrudability of the paste, 32 overlooked in research by Eliche-Quesada et al 10 On the other hand, this type of solution also has a negative impact due to the emission of pollutant gases. As Souza et al 33 show on the case of the reuse of sludge from water treatment in ceramics manufacture, the burning of mixtures with organic content may cause the emission of greenhouse gases.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reusing coffee waste in manufacture of ceramics for construction

Fonseca

Vilão

Galhano

et al. 2013

Advances in Applied Ceramics

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This paper aims at studying the influence of different clay/coffee waste mixtures in structural ceramics by incorporating different amounts of spent coffee grounds as an additive. Clay paste with 5, 10, 15 and 20 wt-% of coffee waste was used to mould clay bodies, which were then fired at the temperatures of 900, 1000 and 1100uC. Morphological aspects were evaluated through SEM images, while several laboratory tests provide the physical and mechanical properties. Incorporation of coffee waste increases the water absorption and apparent porosity, and increasing the firing temperature causes an overall decrease in pore size. Samples with up to 10% coffee waste are in the highest grade of mechanical strength standards. The addition of 20% decreases by 70% the thermal conductivity value. The coffee waste residues could be used as a secondary clay raw material to form proper bricks with excellent thermal insulation proprieties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reusing coffee waste in manufacture of ceramics for construction

Fonseca

Vilão

Galhano

et al. 2013

Advances in Applied Ceramics

View full text Add to dashboard Cite

show abstract

“…There are huge studies that develop the clays characterization used for ceramic products (e.g., Ibrahim et al, 2004;Monteiro and Vieira, 2004;Lisboa et al, 2007;Dondi et al, 2008;Mahmoudi et al, 2008;Meseguer et al, 2010;Diko et al, 2011). In addition, many researches deal with the transformations of clay materials by firing.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Optimisation of Drying Parameters of Ceramic Bodies

Mahmoudi¹,

Srasra²,

Zargouni³

2014

American Journal of Geoscience

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This study deals with the mineralogical, physico-chemical and geotechnical analyses of representative Aptian clays in the north-east of Tunisia. X-ray diffraction reveals a predominance of illite (50-60 wt.%) associated to kaolinite and interstratified illite/smectite. The accessory minerals detected in raw materials are quartz, calcite and Na-feldspar. The average amounts of silica, alumina and alkalis are 52, 20 and 3.5 wt.%, respectively. The contents of lime and iron vary between 4 and 8 wt.%. Physical analyses show that the cation exchange capacity is 34.1-45.7meq/100g of air-dried clay. The plasticity test shows medium values of plasticity index (16-a28 wt.%). The linear drying shrinkage is weak (less than 0.99 wt.%) which makes these clays adapt to fast drying. The firing shrinkage and the expansion are limited. A lower firing and drying temperature can be translated into significant energy savings. Currently, these clays are used in the industrial process for the manufacturing of the earthenware tiles. For the better exploitation of the materials and improvement of production conditions, a mathematical formalism is established for the drying parameters. The regression models relate drying shrinkage (d), bending strength after drying (b) and residual moisture (r) with the moisture (m) and the pressing pressure (p).

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