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Q: Soundness test of cement is carried out to determine
  • A. free lime content
  • B. durability under sea water
  • C. alumina content
  • D. iron oxide content
Correct Answer: Option A - Soundness test– It is essential that the cement concrete does that undergo large change in volume after setting. • Soundness of cement may be tested by Le-Chatelier method or by autoclave method. • For OPC, RHC, LHC and PPC it is limited to 10 mm whereas for HAC and SSC it should not exceed 5 mm. • The soundness test of cement by Le-Chatelier's apparatus gives unsoundness due to free lime only.
A. Soundness test– It is essential that the cement concrete does that undergo large change in volume after setting. • Soundness of cement may be tested by Le-Chatelier method or by autoclave method. • For OPC, RHC, LHC and PPC it is limited to 10 mm whereas for HAC and SSC it should not exceed 5 mm. • The soundness test of cement by Le-Chatelier's apparatus gives unsoundness due to free lime only.

Explanations:

Soundness test– It is essential that the cement concrete does that undergo large change in volume after setting. • Soundness of cement may be tested by Le-Chatelier method or by autoclave method. • For OPC, RHC, LHC and PPC it is limited to 10 mm whereas for HAC and SSC it should not exceed 5 mm. • The soundness test of cement by Le-Chatelier's apparatus gives unsoundness due to free lime only.