INFLUENCE OF THE GARNET CONCENTRATION OF METAMORPHIC ROCKS ON THE FORMATION OF LATERITIC MATERIALS AND THE VARIATION GEOTECHNICAL PARAMETERS IN ROAD BUILDING: CENTER REGION OF CAMEROON

Alain Justin Menye (), Michel Mbessa and Paul Bilong
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Alain Justin Menye: Department of Earth Science, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
Michel Mbessa: Department of Civil Engineering, National Advanced School of Public Works, University of Yaounde, Cameroon
Paul Bilong: Department of Earth Science, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon

Engineering Heritage Journal (GWK), 2024, vol. 8, issue 1, 26-33

Abstract: This study shows the influence of garnet’s content (Cg) of metamorphic rocks on the formation of lateritic materials and their geotechnical road parameters according to the standard test methods of the American Society for Testing and Materials (ASTM). Less than Cg (10 percent) involves the formation of fewer nodules, small sizes with a percentage of fines (˂ 80 μm) as high as 61.9 percent. 20 to 25 % of Cg induced the formation of more and larger nodules and low fines (17.0 to 5.9 percent) in lateritic gravel (LG). These values of fines (%fines) are opposed to the optimum dry density values of compaction γdopm (2.000, 2.430 and 2.460) at the modified Proctor optimum and bearing capacity CBR to 95 % (36, 60 and 68 %) of GL. Thus, GL can be used gradually in sub-base for T2, T3, T4 traffic and base for T1, T2 traffic. The Multiple Determination Coefficients (MCD) are 0.966 with R2 = 0.933 for γdopm, 0.743 with R2 = 0.552 for ω (%) and 0.961 with R2 = 0.924 for CBR according to Cg and %fines. Thus, Cg influences the compaction parameters and %fines of lateritic materials derived from garnet metamorphic rocks. The higher Cg of the parent rock, the best of geotechnical properties of GL derived.

Keywords: garnet content; lateritic gravel; compaction; laterites (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:zib:zbngwk:v:8:y:2024:i:1:p:26-33

DOI: 10.26480/gwk.01.2024.26.33

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