Abstract
The aim of this paper is to give a better understanding of the mechanism of alkali–carbonate reaction, which is essential to solve this durability problem in concrete structures. After studying the microstructural and compositional changes of alkali–dolomite and magnesite reactions both in KOH solution and in cement paste under 150°C autoclaving condition, the authors proposed that the formation and growth of reaction products in a confined space generated the expansion force, which was responsible for alkali–carbonate reaction expansion.
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