Gypsum Modified Compositions with the Use of Activated Basalt Filler

Number of journal: 7-2020
Autors:

Petropavlovskaya V.В.,
Zavad’ko M.Yu.,
Novichenkova T.B.,
Petropavlovskii K.S.,
Buryanov A.F.

DOI: https://doi.org/10.31659/0585-430X-2020-782-7-10-17
УДК: 691.333

 

AbstractAbout AuthorsReferences
During the production of basalt fibers, significant amounts of fibrous waste are generated, and in the workshops, filters capture a large amount of dispersed dust – all this refers to waste that is currently not involved in industrial production, but is buried in landfills. Every year, about 150 thousand tons of secondary basalt fiber waste is deposited in landfills, occupying significant land areas. The most popular use of fibrous basalt wastes is their use in the production of concrete. However, this makes it necessary to protect the fiber from the alkaline environment of Portland cement, which leads to its rapid destruction. The use of waste basalt fibers in gypsum materials is more promising. However, this requires solving problems about the influence of mechanical activation and cleaning from the oiling agent on the properties of compositions. In this study, gypsum binder (GB) β-modification of the G-4 brand, Portland cement (PC) of the PC-400 brand, activated waste from the production of basalt fibers – dust with the presence of coarse (~1000 microns), medium and high-dispersed particles (~10 microns) were used. Studies of the granulometric composition of activated waste have established that grinding reduces the size of particles. The introduction of activated waste in the amount of 10% of the mass of the gypsum binder makes it possible to increase the compressive strength of the resulting gypsum stone by 10% , while the use of waste in the original (not activated) state leads to a decrease in the strength of the modified gypsum stone by 20%. However, the analysis of the results of studies of gypsum cement composition with activated basalt powder shows that the effect of activation of basalt waste on the strength and density of gypsum cement compositions does not occur. During the activation of the waste, the oiling agent coagulates, but this has little effect on the properties. It is necessary to note the influence of the oxide composition of basalt waste on the process of structure formation of gypsum and gypsum-cement composites modified with highly dispersed basalt powder. It was found that activation of the dust-like waste of basalt fiber production makes it possible to change its grain composition, reacting capacity, provide increased dispersion and structure imperfection, and hence its chemical activity.
V.В. PETROPAVLOVSKAYA1, Candidate of Science (Engineering),
M.Yu. ZAVAD’KO1, Master,
T.B. NOVICHENKOVA1, Candidate of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
K.S. PETROPAVLOVSKII2, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.F. BURYANOV2, Doctor of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

1 Tver State Technical University (22, Afanasiy Nikitin Еmbankment, Tver, 170026, Russian Federation)
2 National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

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For citation: Petropavlovskaya V.В., Zavad’ko M.Yu., Novichenkova T.B., Petropavlovskii K.S., Buryanov A.F. Gypsum modified compositions with the use of activated basalt filler. Stroitel’nye Materialy [Construction Materials]. 2020. No. 7, pp. 10–17. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2020-782-7-10-17


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