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The removal of excess air after placing concrete helps in increasing the strength of concrete by ___________(a) 15-20%(b) 20-25%(c) 30-50%(d) 50-70%I have been asked this question in a job interview.My enquiry is from Light Weight Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology |
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Answer» Correct answer is (a) 15-20% |
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