Effect of Mechanical Activated Low-Calcium Fly Ash on Corrosion Resistance of Hydrotechnical Concretes of the Rogun Hydropower Plant

It is known that the introduction of active mineral additives, as microsilica, fly ash, and furnace slag, reduces the growth of concrete caused by the manifestation of reactivity of fillers and sulfate corrosion, however the mechanism of this process remains not to be fully explored. The research in the effect of the low-calcium fly ash on the processes of simultaneous proceeding of the alkaline reaction of fillers and sulfate corrosion of concrete has been conducted. Possibilities of mechanical activation of the low calcium fly ash to enhance its activity were studied. It is shown that the strength of samples of cement-sand mortat with 20% of mechanical activated fly ash exceeds the strength of samples without ash and samples with 20% of initial ash by 18 and 21% and at the same time significantly improves the concrete corrosion resistance. Various methods for the activation of mineral additives under different impacts are described in sufficient details.

K.B. SAFAROV¹, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.);
V.F. STEPANOVA², Doctor of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
V.R. FALIKMAN^{1, 2,} Doctor of Materials Science (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Moscow state university of civil engineering (National Research University) (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
² Research, Design and Technological Institute of Concrete and Reinforced Concrete named after A.A. Gvozdev (6/5, Institutskaya Street, Moscow, 109428, Russian Federation)

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