Controlled deterioration of non-reinforced concrete anchors
AssigneeElectromagnetic Geoservices AS
InventorsSvein Ellingsrud, Audun Sodal, Hans Rechsteiner, Harald Justnes, Kare Ingvar Johansen
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Abstract
A concrete formulation, which undergoes controlled deterioration in water, that can be used for making anchors for releasably tethering submarine devices at the seabed. The anchor may have handles for a device release mechanism or a central hole for a central device release mechanism. The formulation includes additives, which cause the cement to transform into non-binding Thaumasite over a pre-set period of time, leaving only natural material on the seafloor.
Claims17
An anchor that undergoes controlled disintegration in seawater for releasably tethering a submarine device at a seabed, the anchor made substantially from a Portland cement formulation comprising amorphous calcium silicate, the formulation additionally comprising calcium carbonate and a source of sulphate, wherein upon being exposed to seawater for a pre-set period of time up to four months the anchor disintegrates from a binding formulation to a non-binding formulation such that the tethered submarine device is released from the anchor.
Dependencies are inferred from the claim text.