Use of a mineral component, sand, wood flour or combinations thereof for reducing thermal conductivity of a mineral foam

The invention is directed to the use of a component A selected from mineral component, sand, wood flour or combinations thereof, for reducing the thermal conductivity of a mineral foam, the mineral foam is produced by a process comprising a step of contacting a cement slurry and a gas-forming liquid, the cement slurry comprises a cement composition, ultrafine particles of which the D50 is comprised from 10 to 600 nm, a transition metal salt and water, the cement composition comprising a Portland clinker and the component A. the gas-forming liquid comprises a gas-forming agent.