Scientific publications
2016PreprintEnglishOpen access
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Scientific publications
Amadou Moundom
Kamdjo Grégoire
Other affiliations: Victor (Japan)
François Ngapgue
Other affiliations: Victor (Japan)
Chérif Bishweka Biryondeke
SSRN Electronic Journal
This research work deals with the physical characterization of the black pozzolanas, brown pozzolanas and black volcanic ashes. The results showed that the black volcanic ash sands with dimension less than or equal to 5 mm are classified as lightweight, fine, clean, gap-graded and poorly graded materials; Their use as sands for quality concrete needs correction by addition to them of coarser sands. The black pozzolana sands with dimension less than or equal to 5 mm are classified as lightweight, very clean, gapgraded and well-graded and coarser materials; Their use as sands for quality concrete needs correction by addition to them of finer sands. The brown pozzolana sands with dimension less than or equal to 5 mm are classified as lightweight, very clean, gap-graded and poorly-graded and coarser materials; Their use as sands for quality concrete needs correction by addition to them of finer sands. The black pozzolana gravels and the brown pozzolana gravels with dimension between 5 and 20 mm, the black pozzolanas and the brown pozzolanas with dimension greater than 20 mm are classified as lightweight and uniform materials. These latest materials could be used as foundation materials for buildings as well as base and foundation layers for roads, and the gravels used with sand to manufacture concrete and concrete blocks.