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The final setting time of high alumina cement is about _______(a) 30 mins(b) 2 hours(c) 5 hours(d) 24 hoursThis question was addressed to me in my homework.This question is from Plain and Reinforced in chapter Miscellaneous Materials, Plain and Reinforced Cement Concrete of Construction & Building Materials

Answer» RIGHT choice is (c) 5 hours

For explanation I would say: The final setting TIME of high alumina cement is about 5 hours. The setting ACTION of this cement mainly depends on the chemical reactions and therefore it is not essential to grind it to a FINE powder. Great amount of heat is evolved during setting.


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