Abstract
In order to characterize and enhance clay collected in Londela-kayes in the Republic of Congo, in this work, it was a question of proceeding to the mineralogical, physico-chemical, thermal and geotechnical characterization of this clay. Next, determine the technological properties of fired bricks. For this, various methods were used in particular: X-ray diffraction, infrared spectroscopy, gravimetric thermal analysis and differential thermal analysis, dilatometric analysis, scanning electron microscopy, specific surface and analysis chemical. It appears that, for the mineralogical characterization, kaolinite is the most abundant mineral of this clay. The results of dilatometric analysis have shown that this clay can be fired at low temperatures. The geotechnical characterization showed that it is plastic clay thus exhibiting a high shrinkage. The results of the technological properties of LON1 bricks have shown that this clay cannot be used in the manufacture of fired bricks. The geotechnical properties must be improved by adding additives in order to improve the technological properties of the fired bricks.
Highlights
Clay refers to any natural material, composed of fine grains, which turns plastic in the presence of suitable water contents and hardens by drying or heating [1]
This work had for general objective, the characterization and the valorization of clay taken in Londéla-kayes
Its specific objectives were to carry out a mineralogical characterization and to study the technological properties in order to provide the necessary answers linked to the breakage of bricks made by rural populations
Summary
Clay refers to any natural material, composed of fine grains, which turns plastic in the presence of suitable water contents and hardens by drying or heating [1]. The latter is mainly used in the ceramic and pharmaceutical industries, in road. The fired brick manufacturing units are functional, but the products obtained are not of good quality This could be due to the lack of mastery of the technology as well as the quality of the clays used. In order to support rural populations in this sector, our work consists of characterizing these clays, determining the technological properties of fired bricks in order to better understand their use. By characterizing and determining the technological properties of fired bricks from the clay sample at the study site, using modern techniques and equipment, this research may provide answers to certain questions of fundamental interest
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