In soundness tests by Le Chatelier's apparatus the increase in the distance between the pointers should not be more than
A
1 to 2 mm
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B
3 to 5 mm
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C
5 to 10 mm
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D
10 to 15 mm
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Solution
The correct option is C 5 to 10 mm The Le chatelier's method detects unsoundness due to free lime only. Take 100 gm of cement and make a cement paste of consistency 0.78P. The expansion of cement must not exceed 10 mm for OPC, rapid hardening and low heat Portland cement by this method.