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Effect of grain size on selected physico-chemical properties of clay


Ahmed, Osumanu Haruna and Nik Ab. Majid, Nik Muhamad and Jalloh, Mohamadu Boyie (2009) Effect of grain size on selected physico-chemical properties of clay. American Journal of Environmental Sciences, 5 (5). pp. 610-612. ISSN 1553-345X; ESSN: 1558-3910


Mixture of the right proportion of expanding and non-expanding clays to improve plasticity (moldability) of clays used in the pot industry of Malaysia is yet to be well investigated. In addition, little is known about the choice of the right clay size to eliminate or reduce the content of undesirable compounds such as Fe2O3, Al2O3 to improve the strength of pots and roofing tiles in the country. The objective of this study was to investigate how selected physico-chemical properties of pottery clay relate to grain size of Nyalau series ((Typic Paleudults). Approach: Soil samples were refined into 25, 20 and 63 µm using size grading method. The mineralogical composition of the samples was determined using X-Ray Diffraction (XRD). The chemical composition of the samples was also determined using standard procedures. Firing was done at 800°C) in a muffle furnace and the cracks of the samples recorded. Results: The clay particles with sizes 20 and 25 µm were higher in LOI and total C than that those of 63 µm regardless of grain size, the clay investigated had quartz (SiO2), illite-montmorillonite, Anatase ((TiO2) and kaolinite. Grading affected the concentrations of Fe, Al and Si as clays with particle sizes 20 and 25 µm had higher contents of the aforementioned elements compared with those of 63 µm. The clay with particles 63 µm had the best strength and this was so because the clay particles had the lowest amount of Fe, Al and Si. Conclusion: The strength of Malaysian pots could be improved upon proper grading of the clay particles.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture and Food Sciences
DOI Number: https://doi.org/10.3844/ajessp.2009.610.612
Publisher: Science Publications
Keywords: Clay mineralogy; Ceramics; Malaysia; X-ray; Iron oxides; Aluminum oxides
Depositing User: kmportal
Date Deposited: 10 Dec 2013 07:25
Last Modified: 05 Dec 2017 06:02
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3844/ajessp.2009.610.612
URI: http://psasir.upm.edu.my/id/eprint/14254
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