Gypsum-based dry-mix mortar for 3D printing
and preparation method therefor

(22) 10.04.2019

(43) 14.11.2019

(57) A gypsum-based dry-mix mortar for 3D printing and a preparation method therefor, the dry-mix mortar comprising a first cementing material and a second cementing material, the first cementing material being a first gypsum and the second cementing material being formed of a second gypsum, bauxite, and red mud. The dry-mix water is prepared by means of the following steps: evenly mixing the second gypsum, bauxite, and red mud and then calcining to obtain the second cementing material; evenly mixing the second cementing material with the first gypsum serving as the first cementing material and optionally any one or two of a water reducing agent and a water retaining agent to obtain a mixture; adding to the mixture a solvent capable of preventing the gypsum in the mixture from having a chemical reaction, adding to the mixture containing said solvent a coagulant and a binder, and evenly mixing to obtain the gypsum-based dry-mix mortar.

(71) Beijing New Building Materials Public Limited Company (CN)