The Kano–Kazaure highway, north central Nigeria: the significance of the engineering geology in construction

ano–Kazaure highway traverses granitic rock with minor occurrences of metasediments and fine sandy deposits. The soil profiles were studied to determine their suitability in the proposed dualization of the highway route as part of the Trans-Sahara international highway con- struction project. The soils derived from the granitic rocks are well graded, with a high maximum dry density and low optimum moisture content. The soils derived from the schistose and quartzite zone are also suitable for road base and sub-base but the transported loose silty fine sand/sandy silty soils of the Chad Formation are only limited suitability.