As per IS 9103, a superplasticizer (high-range water reducer) can reduce water demand by:
Choose the correct answer
2-5%
5-10%
12-30% or more, while maintaining workability
50-60%
Correct Answer
C. 12-30% or more, while maintaining workability
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IS 9103 admixture categories: water-reducers (WR): 5-10% water reduction; high-range WR (superplasticizers/HRWR): 12-30%+ reduction. Types: Lignosulphonate (normal WR), Naphthalene/Melamine sulphonate (HRWR), Polycarboxylate ether (PCE, latest, best). Used for high-performance concrete, precast, pump concrete.
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