COMPARATIVE STUDY OF THE CALIFORNIA BEARING RATIO TEST AND UNDRAINED TRIAXIALCOMPRESSIVE STRENGTH TEST FOR LATERITIC SOILS

Publication Date : 01/08/2010

Author(s) :

Aboshio, A.

Volume/Issue :

Volume 5

Issue 2

(08 - 2010)

Abstract :

This paper assesses the possibility of substituting the Undrained Triaxial Compresion Test (UTCT) for the California Bearing Ratio (CBR) test for use in pavement design and construction. The UCTC and the CBR tests were performed on samples obtained on site as well as specimens subjected to 24 hours soaking to simulate possible field conditions. Using regression analysis, relationship between UTCT and CBR tests results was developed. The apparently high value of 0.945849 correlation coefficient of this relationship indicate the possibility of substituting the UTCT for the CBR test in the characterization of lateritic soils for pavement design and construction. A model: UTCS=0.0257(CBR)2 + 0.3183CBR + 114.48 was developed for obtaining UTCS values in terms of CBR and vice versa. Statistical test carried out on the results shows that the coefficient of determination (R-squared) is 0.9191. Hence the adoption of the new equation is strongly recommended.

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