Open AccessStructure formation in gypsum-magnesia materials for laying in the developed spaces of salt deposits
Author(s) -
Н. Х. Белоус,
С. П. Родцевич,
О. Н. Опанасенко,
Н. П. Крутько,
В. В. Шевчук
Publication year - 2019
Publication title -
vescì nacyânalʹnaj akadèmìì navuk belarusì. seryâ hìmìčnyh navuk
Language(s) - English
Resource type - Journals
eISSN - 2524-2342
pISSN - 1561-8331
DOI - 10.29235/1561-8331-2019-55-3-359-368
Subject(s) - thixotropy , gypsum , materials science , plasticizer , rheology , raw material , viscosity , composite material , chemistry , organic chemistry
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.