Abstract
Engineering classification of residual granitic soil in Kaduna district, Nigeria, is clarified on the bases of geochemical, geomechanical and statistical studies.
Geotechnical properties of each soil layer are investigated by performing analytical procedure of perticle size distribution, porosity, N-value and chemical composition. The degree of weathering of the parent rock which belongs to tropical savanna zone is discussed in this paper comparing with the characteristics of residual soil derived from granite in Japan.