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Study of Sands from Bamendou-West Cameroon: Valorization for Concrete Mix Design

Journal of Geoscience and Environment Protection 2024年第5期12卷 345-354页

作者： Keubou Tatapzia Vladimir Willianov Guimezap Kenou Willy Chance manefouet bertile ilalie Kamga Djoumen Tatiana Ngapgue François Faculty of Sciences University of Dschang Dschang Cameroon Institut universitaire de la Cô te Douala Cameroun Department of Civil Engineering FOTSO Victor University Institute of Technology University of Dschang Bandjoun Cameroon

Bamendou (West Cameroon), has a huge potential in natural resources, especially sands. However, the use of these materials in civil engineering works leads to the appearance of numerous pathologies which in some cases lead to the total ruin of the works. In order to overcome these infrastructural problems, the main objective of this study is set at the improvement of the service life of structures built in Cameroon using local materials formed under climatic, geological and geotechnical conditions similar to those of materials in Bamendou. Eight sand samples were taken from the most representative and exploited quarries. The identification and classification of the sand taken from the most representative quarries in the study area show that they are mainly clayey, with an average sand equivalent of 57.54. In terms of granulometry, the curves of several sand samples do not fall within the granular range of sands used in the formulation of concrete. The modulus of fineness obtained by particle size analysis varies from 2.91 to 3.92 with an average of 3.31.

关键词： Residual Sand Formulation of Concrete Sand Equivalent Fitness Modulus Particle Size Bamendou

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Contribution to the Characterization of Laterites Developed on Granitic Rock in Mbanga (Littoral-Cameroon): Significance in the Sustainable Pavements Design

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Journal of Geoscience and Environment Protection 2024年第3期12卷 181-191页

作者： Willy Chance Guimezap Kenou Vladimir Willianov Keubou Tatapzia bertile ilalie manefouet Institut Universitaire de la cô te P&#244le de Recherche de l&#8217Inovation et de l&#8217Entreprenariat (PRIE) Douala Cameroun Faculty of Sciences University of Dschang Dschang Cameroon

The materials studied were lateritic soils from Souza-Mbanga-Cameroon, with a view to their better use in road geotechnics. In order to achieve the set objective, the work was carried out in two phases, firstly in the field, to provide a morpho-structural description of the soil profiles, followed by a laboratory phase to analyse the samples collected in the field. The results of the physical characterisation of the soil samples show that, for average values, the water content is 9.87%, the percentage of fines 48%, the plasticity index 21.6%, the liquidity limit 50.91%, and the consistency index 1.97. These soils are classified as silty sands in the LCPC classification and as fine soils in the GTR classification. The average value of the maximum dry density is 1.81 g/cm3 and that of the water content at the modified Proctor optimum is 16.24%. The CBR index is between 1.8% and 17.8%, showing that these soils belong to classes S1, S2, S3, S4 and S5. Souza-Mbanga lateritic soils can be used in their natural state as subgrades.

关键词： Soils Souza-Mbanga Characterisation CBR

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