—The aim of this paper is to predict the field CBR of
different types of soils. Since CBR can't be easily measured in
the field, prediction of CBR from other simple tests such as
Dynamic Cone Penetrometer (DCP) and soil properties is a
valuable alternative. Various soils have been compacted at
different initial state conditions (i.e. water content and dry
density) then using laboratory and field equipment to enable the
measurement of unsoaked CBR and DCP of these soils. Analysis
of the experimental data indicated that there is a very good
linear relationship of the measured soil strength (i.e. unsoaked
CBR and DCP) with the soil initial state factor as described by
the combination of initial dry density, water content and void
ratio. Comparison of the measured and predicted values of
unsoaked CBR and DCP using the developed equation clearly
indicates the validity of this equation.
—Dynamic cone Penetrometer (DCP), in-situ
CBR and the soil initial state factor.
M. M. E. Zumrawi is with University of Khartoum, Sudan (e-mail:
Cite: M. M. E. Zumrawi, "Prediction of In-situ CBR of Subgrade Cohesive Soils
from Dynamic Cone Penetrometer and Soil Properties," International Journal of Engineering and Technology vol. 6, no. 5, pp. 439-442, 2014.