| abstract |
A composition containing a fixed gypsum is described. On one side of the invention, the composition containing fixed gypsum includes at least a penetrating matrix of fixed gypsum made of calcined gypsum, water and an enhancer material. The enhancing material is (i) an organic polyphosphonic compound or mixture; (ii) ulexite, colemanite or a borate selected from a mixture; It can be selected from a mixture of (i) and (ii) cocks. In another aspect of the invention, the composition containing gypsum is (i) an organic phosphonic compound or a mixture; (ii) ulexite, colemanite or a borate; (iii) a carboxylic compound or a mixture; or (i), (ii) and / or (iii) are treated with an enhancer material that can be selected from a mixture of cycles. |