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What is the content of Al2O3 in fly ash?(a) 30-60%(b) 15-30%(c) Up to 30%(d) 1-7%I have been asked this question in a job interview.My question comes from Factors Causing Variation in the Quality of Concrete topic in portion Quality Control of Concrete Technology |
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Answer» Correct CHOICE is (b) 15-30% |
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