Geopolymer Composition on the Basis of Expanded Clay Dust For Geotechnical Construction

Portland cement production is associated with high consumption of minerals, significant energy demand and huge emissions of carbon dioxide into the atmosphere. Therefore, it is important to search for the ways to reduce the cement cost, as well as the negative impact of its production on the environment. An effective way to solve this problem may be the partial replacement of traditional mineral binders in geotechnical construction with composite binders based on geopolymer systems. The term “geopolymers” unites all mineral hydraulic binders obtained by alkaline activation of aluminosilicate raw materials of natural and technogenic origin. In this paper, the possibility of producing a geopolymer based on expanded clay dust is assessed. Expanded clay dust is a waste of the expanded clay production industry, captured in the dust cleaning systems of kilns (dust collection chambers, cyclones, filters). In the course of this research, it was found out that expanded clay dust has sufficient hydraulic activity both when mixed with water and with various alkaline activators. Due to the fact that geopolymer systems and products of their hydration are similar in chemical and mineral composition to natural soils, injectable mixtures based on geopolymers can be effectively used for hardening and compacting soils and solving other geotechnical problems.

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.)

¹ Kalashnikov Izhevsk State University (7, Studencheskaya Street, Izhevsk, 426069, Russian Federation)
² Science Research Centre for Underground Construction (SRC UC) (build. 6, 6, Stroiteley Street, Moscow, 119311, Russian Federation)

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