Chemistry-
General
Easy

Question

About 2 to 5% of gypsum left parenthesis C a S O subscript 4.2 H subscript 2 O right parenthesis is added to Portland cement. It is just to

  1. Increase the setting rate of the cement during hydration    
  2. Slow down the setting rate to increase strength    
  3. Both (a) and (b) are correct    
  4. None of the above is correct    

The correct answer is: Slow down the setting rate to increase strength

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