Structure Formation Aspects for Fluoranhydrate-Based Materials

It is known that moderate physical-mechanical properties of anhydrate-based materials are due to the slow hydration reaction and hardening. To make it faster and manage structure formation of sulfate-based materials different types of hardening activators are widely used. In this article there are results of using activators of different nature and their impact on anhydrate-based binder, activators that were used – sodium sulfate, Portland cement, sodium phosphate and a by-product additive. Metallurgical dust was suggested to use in this research as a by-product additive. It was proved that effective amount of additives is 3% of activator of hardening combining with 0.5–1.5% of metallurgical dust. This amount of additives has led to positive changes in characteristics of material such as increasing of strength (flexural and compressive) and water resistance, reducing of water absorption. All that changes is likely due to changes in hydration conditions. Aspects of hydration process have been explained by microstructure and differential thermal analyses. Microstructure of fluor anhydrate-based material showed that using the additives results in formation of denser structure. Also, additives enable the porosity to decrease and at the same time the contact areas between new growths increase. Spectral results showed that sodium phosphate is the most effective in terms of providing proper conditions for binder hydration.

A.F. GORDINA, Candidate of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
I.S. POLYANSKIKH, Candidate of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.T. GAFIPOV, Master student (This email address is being protected from spambots. You need JavaScript enabled to view it.),
N.V. KUZMINA, graduate student (This email address is being protected from spambots. You need JavaScript enabled to view it.),
I.А. PUDOV, Candidate of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Kalashnikov Izhevsk State Technical University (7, Studencheskaya Street, Izhevsk, 426000, Russian Federation)

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