The Soundness Test of cement using Le-Chatelier apparatus measures expansion caused by excessive presence of:
AFree Lime only
BFree Magnesia only
CBoth Free Lime and Magnesia
DAlkalies (Na2O and K2O)
Explanation
Le-Chatelier apparatus measures soundness (unwanted volume expansion) caused by free lime (CaO) only. Autoclave test measures unsoundness due to both lime and magnesia.

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