A typical test takes only a few minutes and the instrument therefore, provides a very efficient method of obtaining information which would normally require test-pits. Correlations have been established between measurements with DCP and California Bearing Ration (CBR) so that the results can be interpreted and compared with CBR specifications for pavement design. Agreement is generally good over most of the range but differences are apparent at low values of CBR, especially for fine grained materials. It incorporates a 8 Kg weight dropping through a height of 575 mm and a 60 deg. cone having a diameter of 20 mm. It is supplied complete with assembly tools and weighs 20 Kg approx.
The DCP needs three operators, one to hold the instrument, other to raise and drop the weight and a technician to record the results. The instrument is held vertically and the weight carefully raised to the handle limit and then allowed to fall onto the anvil.
The equipment consist of the following replaceable parts
ZI 3026A Top and Bottom Rod
ZI 3026B Handle
ZI 3026C Hammer
ZI 3026D 1m Scale
ZI 3026E 60 deg. Cone
ZI 3026F Anvil