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Laboratoire B.C.B.T.P, 2007. Geotechnical Survey of the non-processed base 0/31.5, Brazzaville, Congo.

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Article

Geotechnical Characterization of Local Materials Used in Road Construction in the Brazzaville Aera, Congo

1Ecole Nationale Supérieure Polytechnique, Université Marien NGOUABI

2Faculté des Sciences et Techniques, Université Marien NGOUABI, B.P. 69 Brazzaville, CONGO/Centre de Recherches Géologiques et Minières, CRGM

3Groupe de Recherches sur les Propriétés Physico - Chimiques et Minérales des Matériaux, Faculté des Sciences et Techniques, Université Marien NGOUABI, B.P. 69 Brazzaville, CONGO/Centre de Recherches Géologiques et Minières, CRGM

4Laboratoire Mécanique, Energétique et Ingénierie, Ecole Nationale Supérieure Polytechnique, Université Marien NGOUABI

5Faculté des Sciences et Techniques, Université Marien NGOUABI

6Laboratoire de Photonique et de Nano-Fabrication, Faculté des sciences et Techniques Université Cheikh Anta Diop de Dakar (UCAD) B.P. 25114 Dakar-Fann Dakar, Senegal


American Journal of Civil Engineering and Architecture. 2017, Vol. 5 No. 1, 29-34
DOI: 10.12691/ajcea-5-1-5
Copyright © 2017 Science and Education Publishing

Cite this paper:
David Bilembi, Hilaire Elenga, Timothée Nsongo, Bernard Mabiala, Adolphe Kimpena, Balla Diop Ngom, Aboubaker Chedikh Beye. Geotechnical Characterization of Local Materials Used in Road Construction in the Brazzaville Aera, Congo. American Journal of Civil Engineering and Architecture. 2017; 5(1):29-34. doi: 10.12691/ajcea-5-1-5.

Correspondence to: Balla  Diop Ngom, Laboratoire de Photonique et de Nano-Fabrication, Faculté des sciences et Techniques Université Cheikh Anta Diop de Dakar (UCAD) B.P. 25114 Dakar-Fann Dakar, Senegal. Email: nsongo@yahoo.com, bdngom@gmail.com

Abstract

The survey of the road construction materials within the Brazzaville Area in the Congo was conducted on the geotechnical data of materials collected from different sites in order to establish a correlation with the norms of their use in Civil Engineering fields. These data include grading curves, consistency limits for the fine fraction, modified Proctor test results and CBR tests. Those data were subjected to classical statistic processing (characterization of every geotechnical parameter variability, study of correlations between parameters). The survey concludes that the material samples analyzed present so close physical properties that they cannot be clearly distinguished through statistical analysis. The overall analysis of the CBR index values varies depending on the materials used. As a consequence these variations cause the deterioration of the pavement structure. The constituents that comply with the above-defined physical properties can be used as materials of a pavement structural layer. The deterioration effects and the granular fragmentation from the Inkisi formations help appreciate the Micro-Deval coefficient and the Los Angeles coefficient, for the figures of both coefficients and result in high figures which means better basic mechanical properties of the foundation and structural layers.

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