| 摘要 |
1. Process for the production of mine barriers of lightweight plaster or anhydrite, characterized in that it consists of mixing the plaster or anhydrite with a stable aqueous foam, constituted by a foaming agent and water, cross-linked or not, then putting the obtained mixture in place between the walls delimiting the barrier, by pumping or the like, the product then expanding in an amount between 10% and 300% as a function of the quantity of added foam, and having a final lightweight cellular structure. |
