ZANDZ Coke Fines to Reduce Grounding Resistance

ZANDZ Coke Fines to Reduce Grounding Resistance

ZANDZ Coke Fines are fines with low resistivity having a particle size of 0 to 10 mm. The use of coke fines for filling grounding electrodes in grounding arrangements allows reducing final resistance of the existing grounding arrangement. High conductivity of coke fines allows creating a zone with reduced resistivity around the electrode.

Benefits of coke fines

  • They are insoluble in water and cannot be washed out. This allows stabilizing the features of the grounding arrangement compared to salt grounding electrodes.

  • They do not form any cavities in the soil upon drying. Porous coke structure allows accumulating and keeping moisture without expanding the materials, i.e. without its reduction upon drying.

  • It increases the service life of steel grounding electrodes not protected from corrosion 5-10 times with the coke layer diameter near the electrode being at least 25 cm.

Calculations and recommendations to perform grounding arrangements using coke fines are detailed in Guidelines for Design, Construction, and Operations of Grounding Electrodes in Wired and Wireless Communication Stations.

Features of ZANDZ Coke Fines

ZANDZ Coke Fines ZZ-14М-030 are packaged in 30 kg PE bags (0.042 m3) or soft 1,000 kg big bag containers (1.4 m3), part number ZZ-14Б-1000.

If large volumes of coke fines are required, they can be supplied in open gondola cars.

Class for piece size (mm) as per GOST 9434-75 at least 10 mm
Resistivity as per GOST R ISO 10143-2016, Ohm•m Up to 2.5
Density, t/m3 0,7 ± 10%
Ash content as per GOST R 55661-2013, % not more than 20
Total moisture weight fraction as per GOST 27588-91, % Up to 22
Fraction over 10 mm as per GOST 5954.2-2020, % Up to 8