Constituents of Cement

Constituents of cement are mainly two types
1.Mineral constituents , 2.Acid and Alkaline constituents.

Mineral Constituents

       Name                   Oxide compositions   Abbreviation    Percentage(%)

Tricalcium Silicate ~     3CaO.SiO2(*1) ~            C3S(*1) ~              45~55
Dicalcium Silicate ~      2CaO.SiO2(*1) ~            C2S(*1) ~              20~30
Tricalcim Aluminate ~    3CaO.Al2O3 ~                      C3A ~                        9~13
Tetracalcium 
Aluminoferrite ~              4CaO.Al2O3.Fe2O3~             C4AF  ~                 8~20
Calcium Sulphate~          CaSo4  ~                                  ----------        ~            2~6
Other Compounds~        ----------   ~                               ---------   ~                  2~8       

Acid and Alkaline Constituents
        
        Name               Composition                Range of percentage


Calcium oxide     ~     CaO               ~               60~67
Magnesium oxide~     MgO               ~               0.1~4
Silica                    ~     SiO2                  ~                  17~25
Alumina               ~     Al2O3                ~                   3~8
Iron oxide             ~     Fe2O3               ~                  0.5~6
Sulphur trioxide   ~     SO3                    ~                  1~3
Potassium oxide   ~     K2O                   ~                   0.3~1
Sodium oxide       ~      Na2O                ~                   0.4~1.3
Loss on Ignition   ~      --------            ~              1.8~2
Insoluble Resedue ~     --------           ~              0.3~0.5