Prediction of CBR using DCP for Local Subgrade Materials
There is lack of correlation between Dynamic Cone Penetrometer (DCP) and Soaked California Bearing Ratio (CBR) for local subgrade materials. The aim of this study is to develop relationships between DCP and soaked CBR, DCP and unsoaked CBR, soaked CBR and unsoaked CBR for fine and coarse grained soils. This paper presents relationships between DCP and CBR for local Subgrade materials. The relationship developed in this research considers subgrade material’s behavior and largely saves time and cost of preliminary and detailed engineering works of road projects. A series of DCP tests in the field, soaked CBR at OMC, and unsoaked CBR at field conditions in the laboratory are conducted. Based on the field and laboratory test results relationships between soaked CBR and DCP, unsoaked CBR and DCP, and soaked CBR and unsoaked CBR are established for fine and coarse grained soils. The relationship developed between DCP and CBR value for fine grained soil shows better than that of for coarse grained soil.
Feleke, G.G.; Araya, A.A. Prediction of CBR using DCP for Local Subgrade Materials. (2016) 30 pp. [Int. Conf. on Transport and Road Research, Mombasa, Kenya, 16-18 March 2016]