California bearing ratio test simplified

Due to the large volume of soil sample material and effort involved, the co nventional California bearing ratio (CBR) tests are laborious and time cons uming. Hence, an attempt was made to use the Proctor mold itself with a pro portionately smaller plunger to estimate the CBR values. The good agreement between the CBR values obtained using the conventional mold and plunger an d the Proctor mold and a smaller plunger (with a correction factor) suggest s the feasibility of this approach, especially for fine-grained soils. The recommended minitest apparatus and procedure make the CBR test much simpler .