Evaluation of Geotechnical Properties of Ilesha East Southwestern Nigeria's Lateritic Soil.

This paper aims at presenting the geotechnical properties of lateritic soil found within Ilesha East Local Government Area, Southwestern Nigeria and environs. For this to be achieved, the following laboratory soil tests were carried out during the course of research viz: particle size analysis test, Atterberg limit test, British standard light compaction test, specific gravity, and California bearing ratio in accordance with British Standard 1377 (1990) and Head (1992). Grain size analysis shows that the percentages passing No. 200 BS sieve are 69%, 51%, 33%, 34%, 56%, 32%, 50%, and 64% for samples P1, P2, P3, P4, P5, P6, P7, and P8, respectively. The liquid limit ranges between 15.5% and 48.6%, plastic limit ranges between 4.66% and 25.60%, and the plasticity index ranges between 7.17% and 23%. California bearing ratio (unsoaked) ranges between 37% and 85%. The specific gravity ranges between 2.61 and 2.80 while the maximum dry density ranges between 2.3Mg/m3 and 2.62Mg/m3 with their optimum moisture contents ranging between 14.5 to 28.0%.