Solid Waste of Soda Production is an Important Reserve for Expanding the Raw Material Base for Production of Lime and Low-Energy, Clinkerless Binders Based on it

The higher user cost of lime relative to Portland cement is justified. It is shown that against the background of depletion of natural deposits of pure limestones, an important reserve for expanding the raw material base of lime production is carbonate waste from various branches of the industries, in particular the production of soda. After the introduction of advanced technology for dewatering distilled slurries at JSC “Soda”, the humidity of solid waste of soda production (SWS) decreased to 30%. This determined the possibility of using them to produce lime and low-energy, clinkerless binders based on it. After firing the SWS, a lime product, corresponding to about the third grade of traditional lime from natural raw materials, is obtained. Samples of aerated concrete with a density of 500-600 kg/m³ and a compressive strength of up to 2.5 MPa (class B1.5) were obtained on the basis of burnt filtered SWS, however aerated concrete with a density of 400 kg/m³ has a strength of about 1–1.5 MPa, which does not correspond to GOST 31359–2007. On the basis of annealed SWS and glinite, it is proposed to produce clinkerless binders of grades M150 and higher. If necessary, the grade of lime-glinite binder can be significantly increased (up to M300–M400) by mixing with 20–30% of Portland cement.

A.N. RIAZANOV¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
D.A. SINITSIN¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
G.Yu. SHAGIGALIN¹, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.),
M.R. BIKBULATOV², Chief Technologist (This email address is being protected from spambots. You need JavaScript enabled to view it.),
I.V. NEDOSEKO¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Ufa State Petroleum Technological University (195, Mendeleev Street, Ufa, Republic of Bashkortostan, 450080, Russian Federation)
² OOO “GlavBashStroy” (2a, Kariernaya Street, Chesnokovka Village, Ufa District, Republic of Bashkortostan, 450591, Russian Federation)

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