Field Tests of Cement

How To Check If Cement Is Good? ==>

The following field tests should be done to determine whether the cement is of good quality:

1.    The cement should be of Greenish Gray colour for Ordinary Portland Cement, and Blackish Gray colour for Portland Pozzolana Cement and Whitish Gray colour for Portland Slag Cement.

2.     There should not be any hard lumps on cement, the cement should be finely powdered. If cement contains hard lumps, then it must be rejected. 

3.    The cement, when rubbed between fingers, should feel smooth, it should not feel granular. If it is granular then it means adulteration with sand. 

4.    A cement paste should feel sticky in between fingers. 

5.    When the hand is dipped into a heap or into a bag of cement, it should feel cool, not warm. 

6.    If a hand full of cement is thrown into a bucket of water, the cement should sink, not float as the Specific Gravity of Cement is greater than that of Water. 

7.    If a thick cement paste made on glass and immersed in water should set, not crack.

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