Production process of dolomite-based facing building materials

Abstract

Abstract The paper presents comparative data on the strengths and weaknesses of glass-magnesite sheets (GMS) and glass dolomite sheets (GDS). It is shown that, over time, the GDS samples change their geometric dimensions more than their GMS counterparts. As established, this is primarily due to the low MgO activity of caustic dolomite (CD), sub-optimal composition of the raw materials, and the large size of particles. The paper proposes a method for activating caustic dolomite by ultrafine grinding in a device with an external electromagnetic layer (vortex-layer device, VLD). A formulation of laboratory GDS samples based on activated caustic dolomite has been developed. It has been found that the strength of the obtained GDS samples is much higher (up to 4-8 MPa). Furthermore, they do not change their geometric shapes (no deformation of samples is observed during the warranty period). Also developed is a production process scheme for GDS samples based on activated CD and a three-dimensional production model.