Define CBR and write the significance of CBR .
i) Definition : The California Bearing Ratio abbreviated as CBR is defined as the ratio of test load to the standard load, expressed as percentage for a given penetration of plunger
ii) Significance :
a) It is most widely used method for design of flexible pavement.
b) For a given CBR, appropriate thickness of construction required above a material for different wheel load and traffic conditions can be determined.
c) It is used for evaluating the suitability of subgrade, sub – base and base course materials.