SC-3 Super Conducting Earth Contact (Coke Breeze) Backfill by Loresco

Premium Earth Contact Backfill for High Current C.P. Anode Systems


Loresco type SC-3 is the finest earth contact backfill in the Loresco line of products. SC-3 is designed specifically for demanding anode systems, which mandate a low resistivity medium. SC-3 is dust free and, according to EPA extraction tests, is extremely pure and complies with regulations governing buried products. Utilizing a modified industrial standard method for testing permeability (API RP-27), SC-3 will mitigate fluid interchange between aquifers.

Loresco SC-3 has a bulk density of 74 lbs per cubic foot. The fixed carbon content is greater than 99.35% by weight. The bulk density and high fixed carbon content coupled with the assured low resistivity medium allows for longer groundbed life at a lower operating cost.

Loresco is already acknowledged around the world as a leader in cathodic protection. A dramatic breakthrough in over 30 years of research, Loresco'a SC-3 backfill once again defines the standard for quality and performance in the cathodic protection industry.


Loresco SC-3 is produced specifically for cathodic protection applications using an exclusive multi-step process. First, a very high quality base carbon with desired characteristics is selected. Next, this carbon is calcined to a minimum temperature of 1250°C under very exacting and controlled standards. This step results in semi-graphitized carbon particles with excellent conductivity. Then, to further improve the bulk conductivity, the surfaces of the individual particles are modified to enhance the contact conductance. This breakthrough in surface alteration ensures maximum electronic current transfer with positive anode contact. Finally, a specially formulated surfactant is added to reduce particle surface tension for compact settling under water.

Material Description

Loresco SC-3 is a surface modified, blended, and sized carbon backfill with surfactants.



  • Fixed carbon: 99.35%
  • Ash: 0.6%
  • Mositure: 0.05%
  • Volatiles: Nil at 950°C
  • Bulk Density: 74 lbs. per cubic foot.
  • Predominantly round particles.
  • All particles surface modified for maximum electrical conductivity.
  • Particle Sizing: Dust free with a maximum particle size of 1 mm.
  • Minimum calcination temperature of base materials in excess of 1200°C.
  • Base materials calcined under ISO 9002 quality control.
  • Surfactants added to assist pumping and settling.
  • No de-dusting oils used during the manufacture of base particles.

Shipping Data

Loresco SC-3 is shipped in 50 lb (22.7 kg) coated, woven polypropylene bags. SC-3 may be stored outside for limited periods (not to exceed 400 hours of sunlight). Pallets are available with 50 bags per pallet. Proven export packaging is also available.


Loresco SC-3, due to its dust-free manufacture, is simple to install by either mixing and pumping or by pouring. With deep anode systems, pumping from the bottom up is recommended. Loresco SC-3 has superb pumping qualities due to the addition of surfactants and when agitated in water, takes on the characteristics of heavy mud. A recommended mix is 7 gallons of water per 100 lbs. After installing SC-3, allow 24 hours settling time before energizing. The modified surface of the carbon particles coupled with the action of the surfactants in SC-3 will achieve positive electrical contact by settling. Vibrating or compacting is not necessary.