Geopolymer Binder on the Basis of Expanded Clay Dust for Injection Mixtures in Geotechnical Construction

The production of Portland cement is associated with a high consumption of mineral raw materials and significant emissions of carbon dioxide into the atmosphere. Therefore, the search for ways to reduce the cost of its production and reduce the negative impact on the environment is an urgent task. In the course of the study, the composition of a geopolymer binder based on expanded clay dust captured in the systems of dust cleaning of kilns: dust-settling chambers, cyclones, filters was developed. To identify the composition of expanded clay dust, methods of physical and chemical analysis were used: IR spectral, differential thermal, X-ray phase analysis and scanning electron microscopy with X-ray microanalysis. It is established that expanded clay dust is chemically active to liquid glass, as a result of their interaction, products based on calcium silicate and silicic acid gel are formed. The method of manufacturing the mixture is considered and the microstructure studies, the results of X-ray microanalysis of the obtained solidified geopolymer, as well as the results of testing standard images-cubes for compression, with a different ratio of liquid glass to expanded clay dust at different concentrations of liquid glass are presented. The use of the developed geopolymer will significantly reduce the cost of work related to the strengthening of the ground base, as well as improve the environmental situation in the production places of ceramic materials.

S.A. KNYAZEVA¹, Engineer (graduate student) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
G.I. YAKOVLEV¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
I.Ya. HARCHENKO², Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
Z.S. SAIDOVA¹, Engineer (postgraduate student) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.M. ALEXANDROV¹, student (This email address is being protected from spambots. You need JavaScript enabled to view it.),
I.A. PUDOV¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.E. STEVENS¹, Engineer (Postgraduate Student) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.I. BABAEV¹, Student (This email address is being protected from spambots. You need JavaScript enabled to view it.),
S.N. SEMYONOVA¹, Engineer (graduate student) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Kalashnikov Izhevsk State University (426069, Izhevsk, Studencheskaya Street, 7, Russian Federation)
² National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

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