Backfill material
AssigneeSika Technology AG
InventorsSebastien DHERS, Dominik FREIMUT, Kai-Steffen WELDERT, Rebecca GUGGENBERGER, Zlatko MARTIC
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Abstract
A backfill material useful in mining and tunneling applications includes a) tailings, b) a binder component, c) water, and d) at least one dispersant selected from 5 polycarboxylate ethers and polycarboxylic acids. The binder component includes a Portland cement clinker-based binder and calcined clay. By the partial substitution of Portland cement clinker-based binder by calcined clay, the backfill material has a reduced carbon footprint. The yield point of the material and the compressive strength of the formed backfill are not compromised.
Claims14
A backfill material comprising
- a. tailings,
- b. a binder component,
- c. water,
- d. and at least one dispersant selected from polycarboxylate ethers and polycarboxylic acids,
- wherein the binder component comprises a Portland cement clinker-based binder and calcined clay.
Dependencies are inferred from the claim text.