Comparative Analysis of Cement and Lateralite on the Engineering Properties of Niger Delta Soils for Pavement Construction
F. M. Alayaki *
Department of Engineering, CB2 1PZ, University of Cambridge, United Kingdom
A. Al-Tabbaa
Department of Engineering, CB2 1PZ, University of Cambridge, United Kingdom
E. A. Meshida
Department of Civil Engineering, Afe Babalola University, Ado Ekiti, Nigeria
M. J. Ayotamuno
Faculty of Engineering, Rivers State University of Science and Technology, Nigeria
*Author to whom correspondence should be addressed.
Abstract
This study investigated the effect of cement and lateralite in improving some engineering properties of Niger Delta soils, classified as clayey soil, silty/clayey sand, and fine sand. Cement had very good effect in reducing the plasticity of the clayey soil and the silty/clayey sand but increased the plasticity of the fine sand, and all the samples had increased soaked CBR and UCS at 28 days especially with 6% and 8% cement contents. 14% lateralite content had the best effect on the silty/clayey sand in reducing the plasticity and increasing both the CBR and UCS. However, no positive effect on the plasticity indices was noticed for the clayey soil and the fine sand, but appreciable increases in their unsoaked and soaked CBR and UCS at 28 days curing. The applications of cement (6% and 8%) and 14% lateralite would make the stabilized soils applicable as sub-base and base materials.
Keywords: Cement, lateralite, engineering properties, CBR, UCS