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Super plasticizers reduce water requirement by ___________ %.

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in Concrete Technology by (122k points)
Super plasticizers reduce water requirement by ___________ %.

(a) 12-30

(b) 10-15

(c) 30-42

(d) 48

I have been asked this question in an international level competition.

My question is from Admixtures in section Admixtures and Construction Chemicals of Concrete Technology

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Correct choice is (a) 12-30

The best explanation: Super plasticizers reduce water requirement by 12-30 %. Makes mix highly fluid and can be placed with little or no vibration or compaction.

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