Title Chemophysical characterization of clay soil used for locally manufactured burnt bricks in Makurdi, B
Journal International journal of Engineering And Applied Science
Publisher Faculty of Engineering, Nnamdi Azikiwe University, Awka Nigeria.
Issue 1
ISSN 1119-8109
Pages 93-95
Subject Physics
Date of Publication 2011

AUTHOR(S) A.N. Amah, I. Ahemen, A. Kur


This study characterized raw samples of clay soil used for local production of burnt bricks in Makurdi. The samples were collected from three well known sites where burnt bricks are produced in Makurdi, Benue State. Chemical analysis showed that the clay is highly rich in Silica-SiO2 (67.9%), Alumina-Al2O3 (17.7%), Potassium oxide-K2O (4.2%) and Iron II oxide-FeO (4.2%). The percentages of fifteen other elements identified are not significant. This shows that Kaolinite (Al2Si2O7) must be responsible for the strength of the burnt clay. The physical analysis showed that the sample(s) has on average, 69.8% clay fraction, 20.7% silt fraction and 8.9% sand fraction. The particle size is <425µm. Average plasticity index is 11.4%, Linear shrinkage is 11.0% while Specific gravity is 2.56%. These values are comparable to specifications of Association of American state Highway and Transportation officials, AASHTO H2O guideline.

Keywords: Raw clay; chemophysical properties; burnt bricks

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