Ultra-light mineral foam
AssigneeHolcim Technology Ltd
InventorsPascal Bost, Serge Sabio, Christine Chaumilliat, Hélène Lombois-Burger
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Abstract
A process for the production of a mineral foam includes separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry includes water and Portland cement as well as calcium silicate hydrate crystallization seeds; contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement; and casting the slurry of foamed cement and leave it to set.
Claims21
A process for the production of a mineral foam comprising the following steps:
- (i) separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry comprises water and Portland cement as well as calcium silicate hydrate crystallization seeds;
- (ii) contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement;
- (iii) casting the slurry of foamed cement and leave it to set, wherein no fine particle addition having a D50<2 μm is introduced to obtain the mineral foam such that the mineral foam obtained is substantially free of fine particles, wherein the slurry of foamed cement is obtained without using a calcium aluminate cement.
A method comprising utilizing calcium silicate hydrate crystallization seeds for enhancing the mechanical stability and/or reducing the collapse of a slurry of foamed cement, said slurry of foamed cement being obtained by
- (i) separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry comprises water and Portland cement as well as calcium silicate hydrate crystallization seeds;
- and
- (ii) contacting the slurry of cement with the aqueous foam to obtain the slurry of foamed cement,
- wherein no fine particle addition having a D50<2 μm is introduced to obtain the slurry of foamed cement such that the slurry of foamed cement obtained is substantially free of fine particles, wherein the slurry of foamed cement is obtained without using a calcium aluminate cement.
Dependencies are inferred from the claim text.