Comparative Geotechnical Analysis of the Properties of Sands from the Major Sandpits in the West Region of Cameroon
- 1 Research Unit of Civil Engineering and Architecture, National Higher Polytechnic Institute of Bamenda, University of Bamenda, Bambili, Cameroon
- 2 Research Unit of Civil Engineering and Architecture, National Higher Polytechnic Institute of Bamenda, University of Bamenda, Bambili, Cameroon
- 3 Laboratory of Civil Engineering and Mechanics, National Advanced School of Engineering, The University of Yaoundé 1, Yaounde, Cameroon
Abstract
Sandpits produce sands of different properties, based on the nature of the weathered mother rocks and sand quality directly affects the performance, durability and functionality of products and processes in construction. A comparative analysis was done on the sandpits in the Noun, Mifi, Hauts Plateaux and Koung-Khi Divisions of the West region to assess the geotechnical characteristics and potential uses of the various sands in construction for sustainable infrastructural development. This comparative analysis consisted of identifying and locating the major sandpits in the West region of Cameroon, determining the geotechnical properties of the various sands, and classifying the various sands to determine their potential uses in construction. The geotechnical testing of the sands was carried out in accordance with AFNOR, EN, and ISO standards, whereas the classification of the sands was performed according to EN, ISO, and ASTM standards. The Noun, Mifi, Baleng, Batié and Bandjoun sand had natural moisture content of 12.90%, 12.10%, 9.50%, 11.42% and 6.98% respectively. From the grain size analysis, the coefficient of uniformity (Cu) and curvature (Cc) of the sands were 2.43 and 0.93, 2.71 and 0.83, 12.86 and 0.84, 8.28 and 1.74, 12.50 and 1.45 respectively. The fineness moduli (FM) obtained were 2.43, 2.40, 3.27, 3.78 and 2.96 respectively. The sands had sand equivalent (SE) of 93.15%, 86.65%, 53.80%, 78.60% and 94.90% respectively. The specific gravities obtained were 2.586, 2.394, 2.471, 2.474 and 2.557 g/cm 3 respectively. The apparent densities were 1.516, 1.456, 1.713, 1.577 and 1.631 g/cm 3 respectively. The compressive strengths of the formulated B25 concrete (That is a concrete designed to achieve a characteristic compressive strength of 25 MPa at 28 days) obtained at 28 days for the various sands were 23.19, 22.32, 20.14, 25.23 and 33.62 MPa respectively. The classification of the various sands according to the USCS showed that the Batié and Bandjoun sand are well graded (SW) while the Noun, Mifi, and Baleng sand are poorly graded (SP). The Batié and Bandjoun sand gave the desired resistance at 28 days, therefore, these sands are good for concrete production. The Noun, Mifi and Baleng sand did not give the desired resistance at 28 days due to their poor gradation and can only be used for light structural applications (15 to 20 MPa).
- Mehta, P.K. and Monteiro, P.J. (2013) Concrete: Microstructure, Properties, and Materials. McGraw-Hill Education.
- Chudley, R. and Greeno, R. (2013) Building Construction Handbook. Routledge.
- Fang, M., Park, D., Singuranayo, J.L., Chen, H. and Li, Y. (2018) Aggregate Gradation Theory, Design and Its Impact on Asphalt Pavement Performance: A Review. International Journal of Pavement Engineering , 20, 1408-1424. https://doi.org/10.1080/10298436.2018.1430365
- United Nations Environment Programme (2014) Sand, Rarer Than One Thinks. UNEP/GRID-Geneva. https://unepgrid.ch/storage/app/media/activities/Sand/Sand-as-a-Resource-Paper-FINAL.pdf
- World Economic Forum (2023) Global Sand Mining: Demand Impacting Environment and Solutions. https://www.weforum.org/stories/2023/09/global-sand-mining-demand-impacting-environment
- European Committee for Standardisation (2018) EN ISO 14688-1—Geotechnical Investigation and Testing—Identification and Classification of Soil. Part 1: Identification and Description.
- European Committee for Standardisation (2018) EN ISO 14688-2: 2018—Geotechnical Investigation and Testing—Identification and Classification of Soil. Part 2: Principles for a Classification.
- Mbuh Moses, K., Nsahlai, L.N., Penka, J.B., Mofor, N.A. and Ncham, M.K. (2024) Physical-Mechanical Properties of Sand from Various Sandpits in the North West Region and Their Recommended Domains of Application. Research Square.
- Ngounou, S.M., Nkendong, C.S. and Fokwa, D. (2017) Geotechnical Characteristics of Sand Deposits from Batié, West Region of Cameroon. International Journal of Geotechnical Engineering , 11, 460-467.
- Tenkeng, A.F., Nkendong, C.S. and Fokwa, D. (2018) Evaluation of the Geotechnical Properties of Sand from Bandjoun, West Region of Cameroon.
- Kouam, G.R., Kamdoum, B., Fokam, A. and Ngnikam, E. (2016) Characterization of Sand from the Noun River Basin in Cameroon for Geotechnical Applications. Journal of Materials and Engineering Structures , 3, 65-72.
- Nkendong, C.S., Fokwa, D. and Tenkeng, A.F. (2018) Geotechnical Characterization of Sand from the Mifi River, West Region of Cameroon. International Journal of Geotechnical Engineering , 12, 369-377.
- Nkendong, C.S., Fokwa, D. and Ngounou, S.M. (2020) Geotechnical Characterization of Sand from the Noun River, West Region of Cameroon. International Journal of Geotechnical Engineering , 14, 412-420.