The need to save time and cost of soil testing at the
planning stage of road work has necessitated developing predictive
models. This study proposes a model for predicting the dry density of
lateritic soils stabilized with corn cob ash (CCA) and blended cement
- CCA. Lateritic soil was first stabilized with CCA at 1.5, 3.0, 4.5 and
6% of the weight of soil and then stabilized with the same
proportions as replacement for cement. Dry density, specific gravity,
maximum degree of saturation and moisture content were determined
for each stabilized soil specimen, following standard procedure.
Polynomial equations containing alpha and beta parameters for CCA
and blended CCA-cement were developed. Experimental values were
correlated with the values predicted from the Matlab curve fitting
tool, and the Solver function of Microsoft Excel 2010. The correlation
coefficient (R2) of 0.86 was obtained indicating that the model could
be accepted in predicting the maximum dry density of CCA stabilized
soils to facilitate quick decision making in roadworks.
 Li, H. “The Family of Compaction Curves for Fine-Grained Soils and
their Engineering Behaviors”. PhD Thesis, (unpublished),. Department
of Civil and Environmental Engineering. University of Alberta,
Edmonton Canada. December 2000.
 Daita, K.R., Drnevich, V.P., and Kim, D. “Family of Compaction
Curves for Chemically Modified Soils”. Publication FHWA/IN/JTRP-
2005/07. Joint Transportation Research Program, 2005, INDOT and
Purdue University, West Lafayette, Indiana, US.
 Ola, S.A. “Geotechnical Properties of some Nigerian Lateritic Soils” in
Tropical Soils in Engineering Practice. Balkema Publishers, Rotterdam,
 Alhassan, M., “Potentials of rice husk ash for soil stabilization” A.U.
Journal of Technology, vol 12, No 2, 2008, pp 246 - 250. Available at
www.journal.au.edu/au_techno. (November 26 2011).
 Apampa, O.A. and Jimoh, Y.A. (2013). “An Evaluation of the Influence
of Corn Cob Ash on the Strength Parameters of Lateritic Soils”
Proceedings of the International Conference on Civil and Building
Engineering, Cape Town, South Africa, November 20 -21, 2013.