Changes in the physicomechanical characteristics of a ceramic paste during drying

Hammouda, Imen; Jlassi, Kamel; Mihoubi, Daoued

doi:10.1016/j.crme.2015.06.001

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…In the current study it is assumed that w cr is equal to the SL. Similar assumption is assumed in other studies 38 . Thermal and mechanical properties of the clay are presented in Table 1 and Table 2.…”

Section: Introductionmentioning

confidence: 62%

Influence of convective intermittent drying schemes on drying induced stress–strain of a 3D clay object

2020

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Drying process of industrial green in-process products especially those susceptible to cracking, need great care, and optimally arrangement of parameters of convective drying. Intermittent drying is a new technique in drying area and is a promising solution for product quality enhancement. The intermittent drying with variable air temperature and the intermittent drying with variable air humidity are the most used techniques. The current study is devoted to 3D modeling and simulation of intermittent drying with variations of both air humidity and temperature and it is then compared with each of the cases of the intermittent drying with variable air temperature and the intermittent drying with variable air humidity. It was observed that the best dried product quality was obtained in intermittent drying with periodic changes of air temperature. Vapor condensation in the intermittent drying with variable air humidity is an undesirable phenomenon that significantly reduces the effectiveness of this process.

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Section: Introductionmentioning

confidence: 62%

Influence of convective intermittent drying schemes on drying induced stress–strain of a 3D clay object

2020

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“…In the current study the shrinkage limit and critical moisture content are assumed to be the same;

true(w_{normals normalh} = w_{normalc normalr} = 0.12 normalk normalg / normalk normalg, normald . normalb true)

. This assumption has been made in other works dealing with clay material drying . Figure shows the comparison between the experimental results and the simulated values of the volumetric strain for clay sample.…”

Section: Convective Drying Periods Of Claymentioning

confidence: 99%

More comprehensive 3D modeling of clay‐like material drying

2017

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Drying process plays an important role in the manufacturing of many products such as ceramic, kitchenware and building materials, some of which have complex three‐dimensional (3D) geometry. To deal with many restrictions found in literatures, a 3D numerical approach was used to describe the drying process of a porous Clay‐like material. The problem investigated involves highly coupled equations considering heat, mass, and mechanical aspects. The model is validated through the comparison of experimental measurements with simulation result. Simulation results show that increasing the initial moisture content and reducing the initial temperature have the same privilege and without significant increase in drying time, it reduces slightly the amount of maximum stress but delays the occurrence time of maximum stress. The nonuniform heat expansion induced stresses are very small in comparison to nonuniform moisture shrinkage induced stresses and can be neglected in drying simulation. © 2017 American Institute of Chemical Engineers AIChE J, 64: 1469–1478, 2018

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“…There are also some important physicomechanical properties that are usually examined for the purpose of limiting the formation of defects that may occur in the dried materials during ceramic products formation (Monsif et al 2019). These include shrinkage, water absorption capacity, bulk density and modulus of rupture (Hammouda et al 2015). Detailed scientific information of the source clay properties is therefore required to guarantee its suitability.…”

Section: Introductionmentioning

confidence: 99%

Mineralogical and Physicomechanical Characterization of Kaolinitic Clay from Moshi, Northern Tanzania for Potential Ceramic Utilization

et al. 2022

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Kaolin clay from Moshi, northern Tanzania has been characterized for potential ceramics productions. Clay samples taken from three different levels of the deposit were analysed by XRD and XRF. Firing experiments were carried out on experimental briquettes at a maximum temperature of 1300 °C at the rate of 100 °C/hour. The results revealed dominance of kaolinite and illite in the raw clay. The samples were composed majorly by silica (36.88–41.62%), alumina (30.83–32.40%) and hematite (9.29–12.70%). Granulometric analysis showed that the amount of clay decreased with deposit depth. The physicomechanical properties of the clay fired at the optimal temperature of 1300 °C included shrinkage (22.06–30.72%), water absorption (18.23–20.15%), bulk density (1.834–2.182 g/cm3) and modulus of rupture (2.957–6.313 MPa). Mullite was the key component responsible for mechanical strength. Clay sample from the top level showed the best properties. The parameters were of satisfactory quality and comparable to other ceramically suitable clays. High levels of Fe2O3 (> 9%) could adversely affect the translucency of whitewares. These findings indicate that the investigated kaolin has potential of being used in the ceramic industry for making materials such as non-vitreous tiles, bricks and various high-temperature products that do not require high brightness specifications. Keywords: Clay mineralogy, firing temperature, microstructure characterization, ceramic properties, Tanzanian kaolin.

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Changes in the physicomechanical characteristics of a ceramic paste during drying

Cited by 9 publications

References 16 publications

Influence of convective intermittent drying schemes on drying induced stress–strain of a 3D clay object

Influence of convective intermittent drying schemes on drying induced stress–strain of a 3D clay object

More comprehensive 3D modeling of clay‐like material drying

Mineralogical and Physicomechanical Characterization of Kaolinitic Clay from Moshi, Northern Tanzania for Potential Ceramic Utilization

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