Investigation of Composition and Technological Parameters of Highly Porous Gypsum Products Obtaining

Abstract

A highly porous structure of a gypsum product creation is possible due to the porisation of gypsum mass, using new types of complex gas-forming components. At the same time, it is necessary to determine the technological conditions for the optimal formation of porous gypsum products structure and methods for increasing their strength. The article proposed to use dispersed calcium carbonate and aluminum sulphate, which interaction is the reaction with the release of СО2 for the porisation of the gypsum cast mixture. Micro-reinforcing additives, such as polymeric, basalt and glass fibers were introduced into gypsum composition together with building gypsum and finely ground calcium carbonate to improve the physico-mechanical properties of gas-gypsum. The best results were shown by the gas-gypsum, which included fiberglass. Glass fiber was pre-ground to a specific surface of 190-240 m2 / kg, in order to improve further the physico-mechanical properties of gas-gypsum.

Modified gas gypsum for thermal and sound insulation in engineering structures

“…Further analysis of the morphological differences in the samples (Figs. [4][5][6] showed that the microstructure of the gypsum stone was largely affected by nanocellulose-based additive. In the unmodified sample (Fig.…”

“…Advantages such as better cost-efficiency, lower complexity and energy intensity of manufacturing, environmental, aesthetic and related properties give gypsum-based an undeniable competitive edge. The production of gypsum binders takes 5 to 10 times less energy compared to cement and lime, and are 2.4 times cheaper to produce since their heat treatment isn't costly [4,5].…”

Properties and Microstructure of Gypsum Stone with Synthetic and Protein Foaming Agents

“…The most common methods of creating porous structures, that are offered now, include technologies using gas-forming additives [5,6]. However, the specific properties of gypsum binders, in particular rapid gripping and hardening, make it difficult to combine the processes of gas release and structure formation.…”