One of the most pressing issues in modern concrete science is the alkali-silica reaction. The occurrence of such a reaction in hardened cement and concrete stone results in the formation of cracks and the material's deterioration. The results of a study on structure development processes in the interfacial transition zone "cement stone aggregate" of alkali-activated cement concretes are presented in this paper. The findings show that the amount of Al2O3 in the cement mix has an impact on the alkali-silica reaction gain in alkali activated materials. An additional source is introduced. The addition of Al to the system results in a constructive gain in the alkali-silica reaction process. This beneficial impact is achieved by adding corrosion products into alkaline alumina silicate compounds, which slows internal concrete corrosion and increases durability, even when using alkali-activated cements and alkali-susceptible aggregates with high alkali concentration. Variations in pH values in various alkali activated cement systems are also illustrated, depending on the type of alkaline component and extra source of alumina.
Author (s) DetailsP. Krivenko
Kyiv National University of Construction and Architecture, Scientific Research Institute for Binders and Materials Named After V.D. Glukhovskii, Povitroflotskii ave. 31, Kyiv 03680, Ukraine.
O. Gelevera
Kyiv National University of Construction and Architecture, Scientific Research Institute for Binders and Materials Named After V.D. Glukhovskii, Povitroflotskii ave. 31, Kyiv 03680, Ukraine.
O. Kovalchuk,
Kyiv National University of Construction and Architecture, Scientific Research Institute for Binders and Materials Named After V.D. Glukhovskii, Povitroflotskii ave. 31, Kyiv 03680, Ukraine.
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