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and thus gives long storage life to cement.

Masonry Cement

It is used for masonry works and has properties resembling to lime mortar instead of cement mortar.

Oil Well Cement

It is used in the oil wells. This cement withstands high temperature and pressure inside the oil

wells while maintaining its mobility.

Concrete Sleeper Grade Cement

It is special cement and is manufactured as specifications formulated by Indian Railways. Particu-

larly used in concrete sleepers but can also be put forth use in restressed concrete elements or
high rise building where high early strength is required.

High Alumina Cement

It is the cement with very high content of alumina and having a unique property of extensively
high rate of strength development.

Physical properties of cement:

Physical properties Standard prescribed

A) Setting time

Initial ………………………………………. Not less than 30 min

Final ………………………………………. Not more than 600 min

B) Compressive strength of mortar with standard sand

2
After 3 days ± 1hour ……………………. Not less than 16 N/mm
2
After 6 days ± 2 hour ……………………. Not less than 22 N/mm

C) Tensile strength

2
After 3 days ………………………………. Not less than 2.0 N/mm
2
After 7 days ………………………………. Not less than 2.5 N/mm
Field test of cement

 Colour of cement should be greenish gray.

 It should have no lumps.

 Insert the hand in cement bag, one should feel cool.

 Rub the cement between fingers, one should feel silky.

Participant Handbook : Masonry 31