Geotechnical Properties and Geochemical Composition of Kaolin Deposits in Parts of Ifon, Southwestern Nigeria
Journal Title: American journal of Engineering Research - Year 2017, Vol 6, Issue 2
Abstract
:This study dealt with the geotechnical and compositional characteristics of the kaolin deposits in Ifon area of Ondo State using a combination of methods including X-ray diffraction analysis. The results show that kaolinite and quartz are the dominant clay minerals whilepyrophyllite, macassite, pyrite and gippsite occur in minor amounts. The bulk chemical composition is dominated by SiO2 and Al2O3 which abundance respectively range from 28.1 % - 38.98% and 21.61% - 29.77% with appreciable amounts of FeS2 (0.18% - 15.37%). The ratio of SiO2 to Al2O3 is 1.3 and is greater than the theoretical value of 1.18 for kaolinites, thus indicating the presence of impurities. Other oxides include Fe2SO3, CaO, NaO, MgO, K2O and TiO2. In the unfired state, the kaolin is whitish in colour but turns to pinkish white after firing which indicates that they could be made into ceramic products of natural good colour. Geotechnical tests show that the samples are dominated by clay-sized particles with a linear shrinkage that ranged from 4%-10%, plasticity index (16.8% - 23.9%) and loss on ignition (9.6%- 24.5%). The results of all the analyses suggestthat Ifon kaolin is a suitable industrial raw material for the manufacture of ceramics, refractory bricks and tiles; as well as additives in the production of paper, paint and fertilizer. ```
Authors and Affiliations
G. P. Ojo1 ,, U. G. Igbokwe2 ,, C. J. Egbuachor, K. K. Nwozor5
Keywords
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