Abstract
Modification of the structure of gypsum-cement-pozzolan binder allows you to expand the range of gypsum binders for creating dry building mixes and structural elements of low-rise buildings. It was found that in the presence of functional additives, the character of crystallization of hydrate neoplasms changes, which leads to a change in the properties of the hardened binder. The study of the effect of individual and complex additives on the properties of gypsum-cement-pozzolan binder allowed us to develop water-resistant gypsum binders.
Highlights
Products and structures made of binding materials are used everywhere today
Gypsumcement-pozzolanic binders were prepared by mixing gypsum binder G-5 B (II) ("Knauf Gips", Krasnogorsk), Portland cement CEM I 42.5 N (Ltd "HeidelbergCementRus" in the village Novogurovsky) and active mineral additive metakaolin (Ltd "MetaRus")
To save the binder and improve its properties, river and dolomite sands, limestone dropout, and microcalcite were added to Gypsumcementpozzolanic binders (GCPB)
Summary
Products and structures made of binding materials are used everywhere today. At the same time, the new time requires the development of new structural and composite materials in conjunction with new technologies. Gypsum binders and materials based on them have a number of valuable qualities: good heat and sound insulation properties, fire safety, relatively low density, decorative properties. Their production is non-toxic and has a low fuel and energy consumption (about [4-5] times less than cement production) [6-9]. There are several ways to increase the water resistance of a gypsum binder, one of the most effective is to create a gypsumcement-pozzolanic binder. The use of various functional modifying additives in the composition of dry building mixes leads to a change in the morphology of hydrate neoplasms, which, in turn, causes a change in the properties of hardened systems [1016]
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