Technical properties of activated gypsum

[摘要] The influence of the activation of the building gypsum in the vortex layer apparatus on the specific surface, the setting time, the heat release, the change in the mineralogical composition, and the strength of the gypsum stone are presented in the article. The measurements were carried out by standard methods. It has been found that the processing of the gypsum binding material in the fluidized bed results in its mechanical activation, which (assuming the optimum processing conditions), in its turn, results in a 200 percent increase in the gypsum's specific surface area, as well as in a 47 percent increase in heat emission during hydration. Assuming the optimum ABS-processing conditions, there is a 44 percent increase in compression strength, and a 50 percent increase in the flexural strength. It takes 2-10 minutes less for the gypsum paste setting.

[发布机构] Department of Technology of Construction Production, Kazan State University of Architecture and Engineering, Zelenaya Street, 1, Kazan; 420043, Russia^1;Scientific and Educational Center Nano-materials and Nanotechnologies, Moscow State University of Civil Engineering, National Research University, Yaroslavskoye Shosse, 26, Moscow; 129337, Russia^2

[学科分类] 土木及结构工程学

[关键词] Binding materials;Compression strength;Mechanical activation;Mineralogical compositions;Optimum processing conditions;Processing condition;Specific surface;Technical properties