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This paper describes the factors influencing the reactivity of quicklime; namely the chemical composition of the raw material, the calcination and decrepitation processes to manufacture calcium oxide (CaO) and the slaking rate of lime in water. The water composition was also investigated. It was found that the presence of impurities, the tendency to decrepitate and overburning of the lime during calcination dramatically decreased its reactivity. Furthermore, the water chemistry has an important influence on the slaking rate of lime: the presence of chloride in the slaking water increases the hydration rate whereas sulfate and magnesium ions decrease this rate and delay the slaking process.
Gallala et al. (Fri,) studied this question.
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