Industrial Ceramic Blocks for Buildings: Clay Characterization and Drying Experimental Study
| Autor: | R. Soares Gomez, Als Guimarães, E. Santana de Lima, João M.P.Q. Delgado, A.G. Barbosa de Lima, R. Pereira de Farias, W.M.P. Barbosa de Lima, A.M. Vasconcelos da Silva |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Thermogravimetric analysis
Control and Optimization Materials science 020209 energy ceramic blocks Energy Engineering and Power Technology 02 engineering and technology Molding (process) Raw material lcsh:Technology law.invention clay mass heat dimensional variation law Mass transfer Lamination 0202 electrical engineering electronic engineering information engineering Relative humidity Ceramic Electrical and Electronic Engineering Composite material Forced-air Engineering (miscellaneous) Renewable Energy Sustainability and the Environment lcsh:T 021001 nanoscience & nanotechnology visual_art visual_art.visual_art_medium 0210 nano-technology Energy (miscellaneous) |
| Zdroj: | Energies, Vol 13, Iss 2834, p 2834 (2020) Energies; Volume 13; Issue 11; Pages: 2834 |
| ISSN: | 1996-1073 |
| Popis: | The conformation of a ceramic piece follows the steps of preparing the raw material, molding, lamination, drying, and firing. Drying is a thermodynamic process of heat and mass transfer, with dimensional variations of the product that requires a large amount of energy. Ceramic materials when exposed to non-uniform drying may suffer cracks and deformations, reducing their post-drying quality. Thus, this work aimed to study the drying of industrial ceramic blocks in an oven with forced air circulation. Experiments were carried out to characterize the clay and drying of the ceramic block at temperatures ranging from 50 °C to 100 °C. Results of the chemical, mineralogical, granulometric, differential thermal, and thermogravimetric analysis of the clay, and heating kinetics, mass loss, and dimensional variation of the industrial ceramic block are presented and analyzed in detail. It was found that the clay is basically composed of silica and alumina (≈ 80.96%), with an average particle diameter of 13.36 μm. The study proved that drying at high temperature and low relative humidity of the air generates high rates of mass loss, heating, and volumetric shrinkage in the ceramic product, and high thermo-hydraulic stresses, which cause the appearance and propagation of cracks, gaps, and cleavages, compromising the final quality of the product. |
| Databáze: | OpenAIRE |
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