Laboratoire de géomatériaux et technologie du bâtiment (LGTB), UFR des sciences de la terre et des Ressources Minières, Université Felix Houphouet Boigny de Cocody, BP 582 Abidjan 22, Côte d'Ivoire
The use of fibers has proven to be an effective solution for correcting certain building pathologies. This is particularly true for plant fibers such as coconut fibers. Their use contributes to the improvement of mechanical performance. This study was conducted to investigate the influence of the length of coconut fibers on the physical and mechanical properties of micro-concrete used for correction. This mortar was prepared with grade 1/5 gravel and 0/1 sand. The fiber lengths are 20 or 40 mm. From the experiments, it is evident that the presence of coconut fibers in the mortar reduces compressive strength, delays setting, and makes it firmer. Regarding fiber length, it varies inversely with the aforementioned delay and workability. However, the increase in length corresponds to an increase in porosity and compressive strength.
With the aim of searching clays that can be used to produce aluminosilicate refractory bricks, characterization studies were carried out on several clays of the region of Abidjan (Ivory Coast) with refractory potential. These studies concerning the chemical, geochemical, mineralogical and thermal characterization showed that clays of Alepe and Anguededou are very rich in kaolinite and have high alumina, and less proportion of melting alkalis and colouring oxides to be refractory clays. The use of geochemical AB diagram of La Roche adapted to clays indicates those Alepe and Anguededou would have a refractory character. These clays after the various characterization tests have also presented interesting chemical and physico-thermal aptitudes to be used in the elaboration of refractory bricks for the manufacture of ovens, blast furnaces, incinerators etc...
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