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The specific surface (m^2/kg) of silica fume.(a) 370(b) 15000-30000(c) 45000(d) 420This question was addressed to me in a national level competition.This interesting question is from Silica Fume topic in section Admixtures and Construction Chemicals of Concrete Technology

Answer»

Right answer is (b) 15000-30000

Explanation: The specific surface area of SILICA fume can be measured with the BET METHOD or nitrogen ADSORPTION method. It TYPICALLY ranges from 15,000 to 30,000 m^2/kg.



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