Aggregate expansivity due to sulfide oxidation — I. Reaction system and rate model
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Abstract Oxidation and hydration of sulfides in aggregate materials can yield to expansive reactions that affect the durability of concrete. This process is, in principle, independent from the potential alkali-aggregate reactivity and the oxidation of the sulfide is the rate-limiting reaction. A model is presented to evaluate the kinetic evolution of expansion due to sulfide oxidation and subsequent sulfate attack on the paste.
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