Method for encasing underground electrical cables
AssigneeHolcim Technology Ltd
InventorsQing Zhang, Anthony Peuchlestrade, Antoine Creyx, Fabrice Toussaint, Jody Wise, Christophe Levy
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Abstract
A method for encasing underground electrical cables, includes (a) providing a fresh concrete composition including a paste that includes a hydraulic binder, a mineral addition and water, the paste being present in a mixture with sand and aggregates, whereby the paste is present in the concrete composition in a volume of <320 L/m3 and/or the solid volume fraction of said paste is >50 vol.-% and (b) placing the fresh concrete composition so as to encase the underground cables therewith.
Claims18
A method for encasing underground electrical cables, comprising:
- (a) providing a fresh concrete composition comprising a paste that comprises a hydraulic binder, a mineral addition and water, said paste being in a mixture with sand and aggregates, whereby the solid volume fraction of said paste is >50 vol.-%, and
- (b) placing said fresh concrete composition so as to encase the underground cables therewith,
- wherein the paste is present in the fresh concrete composition in a volume of <300 L/m3,
- wherein the fresh concrete, after having been placed, is allowed to harden and dry, wherein the thermal resistivity of the concrete once hardened and dried is <0.7 m·K/W, and
- wherein the concrete composition is free from a material having a thermal conductivity of >10 W/m·K.
Dependencies are inferred from the claim text.