The performance of some soils under stabilization in Ondo State,Nigeria

This study was aimed at classifying and improving soils from some parts of Ondo State, Nigeria, using cement and lime as stabilizing agents. The brownish-red clay (Ak-1) and brownish gravelly clay (Ak-2) were derived from migmatitic rocks (consisting of granite gneisses and metasediments) and charnockites in the north and central part, while the reddish clayey sand (Ok-1) was derived from the Quaternary coastal plain sands and alluvial sands in the southern flank of Ondo State. They have high “fines” ranging between 50 % and 80 % thereby requiring improvement before use as pavement material. Their maximum dry densities were achieved at an average of between 4 % and 6 % cement, although peak CBRs were obtained at between 8 % and 10 % lime. It was observed that cement is a more economical additive in pavement construction.