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State whether the following is true or false.
A lower water to cement ratio improves resistance to chemical attack.

  • A.True only at large scales
  • B.False only at small scales
  • C.True
  • D.False

Answer: C

A denser paste with fewer connected capillaries admits aggressive solutions far more slowly. Permeability rather than strength is what governs most durability problems, though the two go together. Specifications often set the ratio as well as the strength class.

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