The type and quality of fine aggregates significantly affect the strength and durability of concrete. Although river sand has been the preferred choice due to its smooth texture and consistent grading, its dwindling availability and associated environmental issues have led to increased interest in using local sand as a…
Subgrade soil properties critically influence the performance of flexible pavements. This study evaluates subgrade variability and its implications for pavement durability in Nigeria, using soil samples collected at depths of 3 m, 6 m, and 9 m from Akazi sand beach in Ihiala, Anambra State. Laboratory tests including s…
Road infrastructure drives economic development by facilitating trade, mobility, and regional integration. In Nigeria, poor road networks and traffic inefficiencies limit productivity and growth. This study examines the economic impact of the Nnewi-Okija Road dualization in Anambra State, a key corridor linking commerc…