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Correlation Between CBR Values and Index Properties of Soils

Intha Srinivasa Reddy

Abstract


Presently India’s infrastructure is growing rapidly. Large number of new urban and lightly
trafficked roads are being constructed or planned. The California bearing ratio (CBR) is the
well known, common and trustful test currently used in road construction. The CBR values
are used by the engineers to design the thickness of pavement layer to be laid on the top of
the sub-grade. Laboratory tests like consistency tests, standard proctor test and CBR tests
were conducted on soil samples. Correlations between index properties and CBR values of
the soil samples were investigated and predictive equations estimating CBR from the
experimental index values were developed. The findings show that good correlation exists
between index properties and CBR values. However, the values of the CBR computed from
the regression models are only to be used for preliminary in view of simplicity and economy
and not acceptable alternatives to laboratory testing.

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DOI: https://doi.org/10.37628/ijce.v3i2.227

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