Asphalt Roadholding in A Tropical Climate: The Example of Guinea Volume 4 - Issue 2

Diaka Sidibé¹*, André Lecomte², Malick Somparé³ and Henri Loua³

• ¹Higher Institute of Mines and Geology, Boké, Guinea
• ²Institut Jean Lamour, UMR 7198, University of Lorraine, Nancy, France
• ³Ministry of Public Works of Guinea, Conakry, Guinea

Received:July 15, 2021   Published: July 27, 2021

Corresponding author:Diaka Sidibé, Higher Institute of Mines and Geology, Boké, Guinea

DOI: 10.32474/TCEIA.2021.04.000186

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This study uses the periodic surveys of the degradation of Guinea’s paved roads from the country’s Road Database. Processing the data from five representative sections shows that these structures suffer recurrent degradation, often located at the same places on the roads. These degradations are mainly manifested by deformations of the pavement, marked by collapses and pronounced ruts. Simulations with the Alize software show that the causes of these disorders are mainly related to problems of the evolutionary bearing capacity of the lateritic support soil between dry and wet periods. This parameter is apparently not yet well integrated into current methods of pavement design in tropical climates. This work can therefore be used to initiate new studies of the mechanical and dimensional behaviour of lateritic materials according to climatic cycles and of the improvements that can be made to them by treatments with hydraulic binders in particular.

Keywords:laterites; pavements; diagnosis; degradation; dimensioning

Abstract| Introduction| Methodology| Surveys Carried Out in Guinea| Results and Discussion| Conclusion| Thanks| References|