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What is the ratio of grades m10,m15,m20,m25,m30,m35,m40.Categories companies no where code is is specified mix ratios for grade of concrete.But is 456-2000 table no 9 is given guideline for nominal mix of grade m5 to m20 by weigh batches.At the same time all are mentioned mix ratios.Is it weigh batch or volume batch.
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