a. Chemical requirement
Chemical requirements of cement are those which are attributed to the chemical content of the cement. It includes SiO2, Al2O3, Fe2O3, CaO , MgO , SO3 content that should be present in cement and their respective tests including Loss On Ignition (LOI), Insoluble residue (IR),Alkali Equivalent etc.
b. Physical requirement
Are those requirement cement should possess as per the standard and have to be confirmed through the following tests; expansion test (volume stability), fineness, Specific surface area (Blain Air permeability), setting time
c. Mechanical requirements
Those properties which can be tested mechanically like comprehensive strength test, flexural test etc so as to qualify the cement as per the standard.