DSCAPESARCH

FIELD TESTS ON CEMENT Field tests on cements are carried to know the quality of cement supplied at site. It gives some idea  about cement quality based on colour, touch and feel and other tests. The following are the field tests on cement: (a) The colour of the cement should be uniform. It should be grey colour with a light greenish shade. (b) The cement should be free from any hard lumps. Such lumps are formed by the absorption of  moisture from the atmosphere. Any bag of cement containing such lumps should be rejected. (c) The cement should feel smooth when touched or rubbed in between fingers. If it is felt rough, it  indicates adulteration with sand. (d) If hand is inserted in a bag of cement or heap of cement, it should feel cool and not warm. (e) If a small quantity of cement is thrown in a bucket of water, the particles should float for some  time before it sink. (f) A thick paste of cement with water is made on a piece of glass plate and it is kep...