Open AccessCombined roasting of raw materials modified by additives-intensifiers in form of low humidity sludge
Author(s) -
Г. Ф. Аверина,
В. А. Кошелев,
L. Y. Kramar
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/687/2/022038
Subject(s) - raw material , magnesium , cement , roasting , granulation , materials science , compressive strength , humidity , aqueous solution , metallurgy , composite material , chemistry , organic chemistry , physics , thermodynamics
This article describes the method of obtaining magnesium oxychloride cement for construction purposes. The study describes the possibility of introducing additives that intensify the process of burning magnesium-containing raw materials in the form of an aqueous solution to obtain a sludge of low humidity. The advantages of this method are described in comparison with the known method of wet granulation of ground raw material with an aqueous solution of the additive. A two-factor experiment was carried out to identify the optimal grain size of the raw material. The dependences of the change in the strength characteristics of a magnesium stone on the amount of the intensifier additive and the fractional composition of the modified raw material are described. The optimal area of the applied fraction and the amount of the additive, allowing one to obtain a magnesium stone with maximum compressive strength, has been established. The authors investigate the tendency of all samples to the formation of cracks. The reasons for the use of grain size outside the established range negatively affecting the quality of the magnesium oxychloride cement obtained are suggested.