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The principal binding product formed when Portland cement hydrates is

  • A.calcium silicate hydrate
  • B.crystalline calcium hydroxide
  • C.precipitated calcium carbonate
  • D.hydrated calcium sulphate

Answer: A

Often written as C-S-H, it is a poorly crystalline gel that fills the space between the grains and gives the paste its strength. Calcium hydroxide is formed alongside it but contributes far less to the strength of the hardened material.

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