Title of article :
Permeability to water of sintered clay ceramics
Author/Authors :
Kam، نويسنده , , S. and Zerbo، نويسنده , , L. and Bathiebo، نويسنده , , J. and Soro، نويسنده , , J. and Naba، نويسنده , , S. and Wenmenga، نويسنده , , U. and Traoré، نويسنده , , K. and Gomina، نويسنده , , M. and Blanchart، نويسنده , , P.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
7
From page :
351
To page :
357
Abstract :
The microstructural characteristics of sintered clay ceramics depend mainly on the clay type and thermal transformations. Different pore morphology and connectivity change the liquid water flow process through the material, as in the case of roof tiles which are progressively saturated with water during rain. In this study, 2 clays mined in Burkina Faso are used for manufacturing roof tiles. The major phases detected by X-ray diffraction in the two clays are kaolinite, illite, smectite, quartz and feldspar. ermal behavior of clays by DTA and TG between 25 °C and 1100 °C is mainly related to individual roles of clay minerals. During sintering, dilatometry curves show successive densification stages in variable temperature ranges, as a function of clay mineral fractions in compositions. It explains differences in microstrutural characteristics and pore structure. mulation of the capillary absorption of water uses the Sharp Front model. The interesting feature of this approach is that measurement of the data for the model requires no complex equipment. Only the Darcy permeability of the material and the steady state capillary pressure are necessary. Results evidence the strong difference of water absorption rates in the 2 clay ceramics, whereas they present similar porosity. It confirms the importance of pore morphology and connectivity in ceramics, induced mostly by the clay type and the sintering process.
Keywords :
Ceramic , clay , Burkina Faso , Permeability
Journal title :
Applied Clay Science:an International Journal on the Application...
Serial Year :
2009
Journal title :
Applied Clay Science:an International Journal on the Application...
Record number :
2222852
Link To Document :
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