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Q: The autoclave test is used to determine the .............. in Portland cement.
  • A. expansion
  • B. sulphur content
  • C. rate of hydration
  • D. calcium content
Correct Answer: Option A - Auto clave test– Auto clave test is used for soundness of cement. It is sensitive to both lime and magnesia. The test consists of heating bars made of cement paste with water of normal consistency and measuring its expansion. The autoclave expansion of aerated cement should not be more than 0.8%.
A. Auto clave test– Auto clave test is used for soundness of cement. It is sensitive to both lime and magnesia. The test consists of heating bars made of cement paste with water of normal consistency and measuring its expansion. The autoclave expansion of aerated cement should not be more than 0.8%.

Explanations:

Auto clave test– Auto clave test is used for soundness of cement. It is sensitive to both lime and magnesia. The test consists of heating bars made of cement paste with water of normal consistency and measuring its expansion. The autoclave expansion of aerated cement should not be more than 0.8%.