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Which of the following is responsible for the strength and durability of hydrated cement? (a) CH(b) Ettringite(c)...

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Civil Engineering

  1. Which of the following is responsible for the strength anddurability of hydrated cement?

(a) CH(b) Ettringite(c) C-S-H (d) All  

  1. Usually pozzolanic cement replacement materials react with:

  1. C3S(b) C-S-H(c) CH(d) C2S

  1. Compaction of concrete results in removal of:

  1. Free water(b) Entrained air(c) Entrapped air(c)All  

  1. Ultrasonic pulse velocity test is used for determining …….. ofconcrete:

  1. Strength(b) Hardness(c) Durability (d) Cracks

  1. Air-entraining agent is used in concrete mainly for:

  1. Corrosion resistance  (b) Freeze-thaw resistance (c)Better workability (d) Less Strength

  1. Which type of ASTM cement is suitable for urgent repairwork?

  1. Type II(b) Type III(c) Type IV(d) Type V

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