PRODUCTION OF DECORATIVE AND FACING CONSTRUCTION ARTICLES Russian patent published in 2016 - IPC C04B28/14 C04B40/00 

FIELD: process engineering.

SUBSTANCE: invention relates to construction materials, particularly, to production of decorative and facing construction articles. It can be used for production of gypsum-polymer decorative facing plate, artificial stone of various shapes and sizes and other architectural decorative articles for building interior and facade. Claimed process comprises preparation of the dry mix containing the binder, G-5-grade gypsum, as well high-strength gypsum of separated grade G-16, G-19 with hyper plasticiser Mellflux 2651F, quartz sand, mounting glue and water. Note here that dry mix, hence, water and solution for tempering are performed at the ratio of 4:1 for 1-2 minutes. Then, the solution is poured into the moulds. The latter are vibrated for 3-10 minutes, the solution is hydrated and dried for 23-25 h at 50-55°C and processed with water-repellant fluid at the following ratio of components, wt %: G-5-grade gypsum - 45-45.5, high-strength gypsum of separated grade G-16, G-19 - 23-23.5, hyper plasticiser Mellflux 2651F - 0.12-0.16, quartz sand - 16-16.5, mounting glue - 11-11.5, water making the rest.

EFFECT: higher strength, frost resistance and decreased water absorption.

2 cl