Applied Social Science / Education

Permanent URI for this collection

https://datad1.aau.org/handle/123456789/1386

Browse

Browsing Applied Social Science / Education by Subject "Education"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Optimization study of the physical parameters of clays from three (3) quarries in the region of MARADI, Niger
    (2020-02) Garba, Salifou; Ali, Aboubacar; Boukar, Makinta
    This article focuses on the determination of the physical parameters of three (3) clay quarries located in the region of MARADI the Republic of Niger. These quarries are in the cities of MARADAWA, JIRATAWA and KABAWA. The parameters to be determined are: water content, particle size, ATTERBERG limits, compressive shear, compressibility and water permeability (porosity). Studies have shown that clays in KABAWA and JIRATAWA quarries are weakly compressible with respective liquidity limits of 31.4 and 36.3. The clay of the quarry of MARADAWA is, for its part, very compressible with a liquidity limit of 55.6. The plasticity index of these three soils is between 14.3 and 26.4 while the void number is between 0.271 and 0.647. As a result, these soils are plastic. JIRATAWA and KABAWA soils are more permeable to water than MARADAWA. We also find that the MARADAWA soil is more resistant to mechanical stress than those of JIRATAWA and KABAWA. All three clays are suitable for use in building construction and pottery.
  • Thumbnail Image
    Item
    Study of Mass and Energy Yields of an Agroforestry Residues Carbonizer
    (Seventh Sense Research Group, 2021-11) Nouhou, Doulla Seydou; Ali, Aboubacar; Ibrahim, Horouna Gado
    Energy recovery from processing wastes of agricultural products is a solution to their management issues and a means of energy production. In addition, it contributes to the reduction of deforestation. The objective of this study is to develop a method of agroforestry residues carbonization. The residues used to consist of the shell of the doum palm (hyphaenethebaica) and the rice husk. Carbonization is in partial combustion, and the device used is a metal furnace made up of three (3) stages. The peaks of temperatures, mass and energy yields, and the quality of the coal (fixed carbon rate) were determined at each stage of the carbonized. The mass yields obtained for stages 3, 2, and 1 are 66.41%, 42.60%, and 21.57% for the shell of the doum palm and 46.94%, 67.19% 24.83% for the rice husk. The energy yields are 82.41%, 57.05%, and 30.97% for the shell of the doum palm and 56.1%, 74.58%, and 26.66% for the rice husk. The coal quality (fixed carbon rate) for the same stages 3, 2, and 1 is 35.32%, 44.42%, and 52.32% for the shell of the doum palm and 32.55%, 30, 43%, and 30.75% for the rice husk. The cycle time is 9.03h for the shell of the doum palm against 11.22h for the rice husk. This study shows that the shell of the doum palm produces better quality charcoal compared to the rice husk and that the charcoal obtained at stage 1 ( ) can be used not only for gasification but also for direct home use.