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US 4,177,078 AGranted
Thermal stabilization of soil
AssigneeMinnesota Mining and Manufacturing Company
InventorsWalton W. Welna, Lowell C. Frank
Life of this patent
Estimating the term…
Abstract
A stabilizing agent and backfill composition for providing a thermally stable environment for buried electrical equipment comprising from about 90 to about 99 percent by weight soil and from about 1 to about 10 percent by weight of the stabilizing agent, which is comprised of a mixture of clay and a dispersing agent therefor, wherein the dispersing agent comprises at least about 0.25 percent by weight of the stabilizing agent.
Claims3
A process for providing a thermally stable environment for underground electrical equipment comprising the steps of:
- (a) placing said equipment in an open trench;
- (b) backfilling said trench with soil in which from about 1 to about 10 percent by weight of a stabilizing agent is thoroughly mixed in the presence of water, said stabilizing agent comprising a mixture of clay and a dispersing agent for said clay, wherein said dispersing agent comprises at least about 0.25% by weight of said stabilizing agent.
Dependencies are inferred from the claim text.