Cement additive for retardation of cement hydration, cement mixtures including same, and methods of forming and using same
AssigneeThe Regents of the University of Colorado, a body corporate
InventorsWilfred V. Srubar, III, Xu Chen
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Abstract
Cement mixtures comprising a hydration retarder comprising algae, cement additives comprising algae and/or derivatives thereof, and methods of forming and using the mixtures and additives are disclosed. The algae can be treated to form desired functional groups to tune retardation properties of the hydration retarder.
Claims28
A cement mixture comprising:
- about 0.01 wt % to about 10.0 wt % hydration retarder by weight of the cement, the hydration retarder comprising algae.
A cement additive for retardation of cement hydration, the cement additive comprising:
- algae.
A method of forming a hydration retarder for cement, the method comprising the steps of:
- providing algae, and
- optionally exposing the algae to an oxidant to increase an amount of one or more of a carboxyl group and a hydroxyl group on a surface of the algae.
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Dependencies are inferred from the claim text.