| 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.
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