Abstract: A method for retarding hydration of a surface of a hydraulic composition includes shaping the hydraulic composition, applying an emulsion onto the surface of the hydraulic composition, and removing a film and a surface layer formed by a non-hardened hydraulic composition from the surface of the hardened hydraulic composition after hardening the hydraulic composition. The emulsion has an oily phase and an aqueous phase, in which the oily phase is dispersed in the aqueous phase. The emulsion includes a non-quaternary amine surfactant and an acid having a set-retarding effect.

Abstract: The application relates to a method for creating a pattern on a surface of a hydraulic binder-based composition, comprising applying by printing a deactivating composition (D1) or acidic composition (A1) to a part or to the whole surface of a hydraulic binder-based composition.

Abstract: The invention relates to an anti-filming surface adjuvant for hydraulic binders comprising at least one fat and at least one anti-caking agent, to its preparation method as well as to a method for preparing a hydraulic binder composition suitable for making screeds or self-compacting concretes (SCC) including the step consisting of adding to the hydraulic binder the adjuvant according to the invention at a dosage comprised between 50 and 1,500 g/m3 of screed or of concrete.

Abstract: The invention relates to an anti-filming surface-active admixture for hydraulic binders, including at least one fatty alcohol and at least one oil, to the method for preparing same, and to a method for preparing a hydraulic binder composition suitable for the manufacture of screeds or concretes, comprising the step of adding, to the hydraulic binder composition, the admixture according to the invention in a metered amount of 0.1 to 5 wt % with respect to the weight of the hydraulic binder.

Abstract: The invention relates to an anti-filming surface-active admixture for hydraulic binders, including at least one fatty alcohol and at least one oil, to the method for preparing same, and to a method for preparing a hydraulic binder composition suitable for the manufacture of screeds or concretes, comprising the step of adding, to the hydraulic binder composition, the admixture according to the invention in a metered amount of 0.1 to 5 wt % with respect to the weight of the hydraulic binder.

Abstract: The invention relates to an emulsion consisting of an oily phase dispersed in an aqueous phase, comprising a non-quaternary amine surfactant and an acid with a set-retarding effect as well as to a method for its preparation. Moreover, it relates to a method for surface retarding of a hydraulic composition, comprising the steps of: (a) shaping the hydraulic composition; (b) applying onto the surface of the hydraulic composition, the emulsion according to the invention, which by breaking releases the oily phase; and (c) after hardening of the hydraulic composition, removing the film formed with the non-hardened hydraulic composition surface layer.

Abstract: The invention relates to an anti-filming surface adjuvant for hydraulic binders comprising at least one fat and at least one anti-caking agent, to its preparation method as well as to a method for preparing a hydraulic binder composition suitable for making screeds or self-compacting concretes (SCC) including the step consisting of adding to the hydraulic binder the adjuvant according to the invention at a dosage comprised between 50 and 1,500 g/m3 of screed or of concrete.