Structure formation in gypsum-magnesia materials for laying in the developed spaces of salt deposits
https://doi.org/10.29235/1561-8331-2019-55-3-359-368
Abstract
The influence of the preparation method, gypsum content and liquid-solid ratio on the process of hardening and properties of mixed gypsum-magnesia binders intended for laying in the developed space of salt areas has been studied. With the introduction of fillers – waste from the development of salt deposits and plasticizers – in them, filling mixtures, which are non-linear viscoplastic thixotropic systems with a certain period of stress and strain relaxation, have been obtained. The phase composition of hardening products, electrokinetic, rheological and physico-mechanical properties of the obtained plasticized filling mixtures depending on the method of injection, the type and content of plasticizers have been investigated. At optimum liquid-solid ratio and the plasticizer content of the mixture with low static and dynamic yield stress and effective viscosity and extended setting time have been obtained.
About the Authors
N. Ch. Belous
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Natalia Ch. Belous – Ph. D. (Chemistry), Senior Researcher
9/1, Surganov Str., 220072, Minsk
S. P. Rodtsevich
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Sofia P. Rodtsevich – Researcher
9/1, Surganov Str., 220072, Minsk
O. N. Opanasenko
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Olga N. Opanasenko – D. Sc. (Chemistry), Head of the Laboratory of Oil and Organic-Mineral Dispersions
9/1, Surganov Str., 220072, Minsk
N. P. Krutko
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Nikolay P. Krutko – Academician, D. Sc. (Chemistry), Head of the Department of Composite Materials
9/1, Surganov Str., 220072, Minsk
V. V. Shevchuk
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Viacheslav V. Shevchuk – Corresponding Member of the National Academy of Sciences of Belarus, D. Sc. (Chemistry), Head of the Department of Mineral Fertilizers
9/1, Surganov Str., 220072, Minsk
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