ADMIXTURES FOR MINERAL BINDERS BASED ON (OXIDISED) SUGAR AND HYDROGENATED SUGAR, ADMIXTURE-CONTAINING MINERAL BINDERS, AND A PROCESS FOR THE PREPARATION THEREOF

摘要

The invention relates to a novel admixture for mineral binders, composed of a composition containing at the same time a sugar or an oxidized sugar and a hydrogenated sugar. ;The oxidized sugar may consist, in particular, of gluconic acid or one of its salts or an oxidized starch hydrolysate. ;The hydrogenated sugar may consist in particular of maltitol, sorbitol, mannitol, xylitol, arabitol, or a hydrogenated starch hydrolysate containing at least 40% by weight of maltitol. ;Within the admixture, this composition may be combined with conventional admixtures such as phosphates, borates, or amines. ;The combination of a sugar or an oxidized sugar and a hydrogenated sugar within this composition makes it possible to obtain synergistic effects, particularly in terms of plasticity and mechanical properties of the mineral binders. ;The admixtures claimed may be used equally well for admixing with cements, raw materials for cements as for admixing with mortars, slurries and concretes. ;They may also be used in other sectors such as, for example, the plaster industry, particularly as complexing agents or hydration or dehydration controllers.