Back fill
Petroleum coke breeze is a carbon back fill which is used around impressed current anodes for underground cathodic protection
applications. It is used to:
•Reduce the resistivity of the environment surrounding the anode to increase the amount of current the anode can discharge
•Extend the anode surface area, thus increasing the amount of current the anode can discharge
•Reduce consumption of the anode since the carbon becomes the part of the anode consumed before the anode itself.
While the main purpose of coke breeze back fill is to reduce the anode-to- earth circuit resistance and to increase anode service life, it also helps to eliminate gas blockage and drying tendencies.

According to IPS Standard we have product 3 type of back fill