Forensic Investigation of Premature Failure of a Roadway Pavement in Minna, Niger State, Nigeria

Abstract

Field and laboratory studies were conducted to investigate the premature failure of a township roadway pavement in Minna, Niger State, Nigeria. tests conducted on the pavement layers of the failed road included moisture content, particle size distribution of soil samples, Atterberg limit tests, in-situ densities and dynamic cone penetrometer (DCP) tests. An empirical equation from literature was used to compute the California Bearing Ratio (CBR) of various pavement layers from DCP data. Data from the tests indicate that the field moisture content of the pavement layers were high recording values above the optimum moisture content.