The purpose and objective of this test is to determine the carrying capacity of the land expressed in the value of CBR (California Bearing Ratio) with units% (percent). CBR data is used as one of inputs in road planning process that is to:
Determination of pavement thickness (full depth pavement) for planned road sections will get "road widening" handling;
Determination of overlaid thickness above asphalt road if not available / no Benkelman Beam data;
Determination of pavement thickness for road section to be reconstructed (entire old pavement dismantled);
Determination of new pavement thickness.
DCP or Dynamic Cone Penetrometer is a tool used to measure the carrying capacity of an in-situ ground base. The carrying capacity of the basecoat is calculated on the basis of the processing of the DCP test by measuring how deep within (mm) ends of the cone enter into the bottom soil after obtaining a shear hammer collision on the main stem base. The correlation between the number of collisions and the penetration of the conus ends of the DCP tool into the ground will give a picture of the strength of the ground ground at certain points. The deeper the incoming cone for each collision means the softer the base soil. Testing using a DCP tool will produce data that after being processed will yield baseline ground CBR at the point under review.