Ground electrode backfill composition, anode bed and apparatus
AssigneeCathodic Engineering Equipment Co., Inc.
InventorJoseph F. Tatum, Jr.
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Abstract
A low resistance non-permeable backfill especially for use in vertical anode beds for cathodic protection of subsurface metallic structures includes a mixture of carbonaceous materials, naturally occurring graphite lubricants, additives to reduce the apparent viscosity of the slurry and portland cement mixed with water and pumped as a high density fluidized suspension into the anode bed, particularly around the casing of a deep anode bed of the general type described in United States patent to Tatum U.S. Pat. No. 3,725,669.
Claims8
A conductive non-porous backfill material for earth anode beds comprising, a mixture of sized calcined fluid petroleum coke, naturally occurrihg graphite flakes, viscosity reducers and portland cement.
A conductive non-porous backfill material for earth anode beds comprising a mixture of the following components:
- ______________________________________ Percent by Weight of Total Mixture ______________________________________ Calcined Fluid Petroleum Coke 83.5- 85 Portland Cement 15- 16 Powdered Graphite .75- 1.25 Surfactant .25- .5 ______________________________________
Dependencies are inferred from the claim text.