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Masonry cement differs from Portland cement in being formulated for

  • A.achieving the highest possible compressive strength
  • B.use only in reinforced concrete structural work
  • C.setting hard under water within a few minutes
  • D.workability in mortar rather than high strength

Answer: D

Plasticisers and air-entraining agents give a mortar that spreads and holds water well. High strength would in fact be a disadvantage in a mortar joint, which should be weaker than the units it bonds. Strength is only one property among several that a mortar must balance.

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