eng Science and Education Publishing American Journal of Civil Engineering and Architecture 2328-3998 2017-02-07 5 1 29 34 10.12691/ajcea-5-1-5 AJCEA2017515 article David Bilembi 1 Hilaire Elenga 2 Timothée Nsongo nsongo@yahoo.com, bdngom@gmail.com 3 Bernard Mabiala 4 Adolphe Kimpena 5 Balla Diop Ngom nsongo@yahoo.com, bdngom@gmail.com 6 Aboubaker Chedikh Beye 6 Ecole Nationale Supérieure Polytechnique, Université Marien NGOUABI Faculté des Sciences et Techniques, Université Marien NGOUABI, B.P. 69 Brazzaville, CONGO/Centre de Recherches Géologiques et Minières, CRGM Groupe 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 Laboratoire Mécanique, Energétique et Ingénierie, Ecole Nationale Supérieure Polytechnique, Université Marien NGOUABI Faculté des Sciences et Techniques, Université Marien NGOUABI 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 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. http://pubs.sciepub.com/ajcea/5/1/5/ajcea-5-1-5.pdf materials physical properties mechanical properties proctor tests CBR tests