CEMENT/case study on cement industry

                         PORTLAND CEMENT

Cement is a special class of finely ground material obtained by heating a mixture of lime , silica, alumina, and iron oxide at a very high temperature.

             Constituents of portland cement by the flowing compounds………….

Ca2 Sio4 (26%) ,Ca3 Sio5 (47%) ,Ca3 Al2 O6 (11%) ,Ca4 Al2 Fe2 O10 (7%) ,CaSo4.2H2 O (23%) , &  CaO , MgO

......................................................................................................................................................................                                               

                        HISTORY OF CEMENT     

                                                               

                         

          In 1824, a british mason JOSEPH ASPDIN  mixed finely pulverised, limestone, and clay, taken in a specific proportion and burnt them at high temperature  

         Which was far superior then any binding material known at the time.it is aspdin who named it portland cement                                

......................................................................................................................................................................                                              British Portland Cement Manufacturers 

The company was founded in 1900 as Associated Portland Cement Manufacturers Ltd by the amalgamation of 24 cement companies,[2] owning a total of 35 cement plants.

                             

                             South India Industrial Ltd. ( bangur cement)

The first cement factory established in India was established at Chennai (Madras) in 1904. The cement industry in Chennai (Madras) laid the foundation of cement manufacturing in India. It was established
                                                            by

 South India Industrial Ltd.   

                                  

       NOW  TOTAL CEMENT COMPANIES IN INDIA  =145

Here is the list of Top 7 cement companies in India.  

 1] CC Ltd. ACC Ltd 

 

2) Ambuja Cements Ltd. ...

 

3) Birla Corporation Ltd. ...

5) UltraTech Cement Ltd. ...

6) JK Cement Ltd. ...

7) Shree Cement Ltd (SKB) .

                                                                 1pac cement = 50 kg cements

                                                                                    TO SEE ALL CEMENT COMPANY LIST

TAB THIS LINK-----    https://eaindustry.nic.in/cement/report1.asp

              Mmtypes of Portland cement         

1     Ordinary portland cement

              

           Used  = It mainly used as an important building material

2     Slow-setting portland cement

                

                  Used       =    This type of cement starts setting after several hours in the presence of water. So, it is used for construction work at distant place        

3   Low heat portland cement

            Used     =      This type of cement is used for the construction of dams, bridges etc.

4    High early strength portland cement

        

            Used       =         This type of cement is used construction of road and culverts on emergency basis because it take only 72 hours to acquire the desired strength.

5      Sulphate resistant cement   

  

               

              Used      =         This type of cement mainly used in places close to sea, for under sea water construction and at places where sulphate compounds are present in large quantities.

                                   

                         Some special types of cement       -

   1    White cement                             2    Pozzolana cement

    3     Blast furnace slag cement         4     Water-proof    cement     

   5     High alumina cement               6     causes of setting of cement

   7    Plaster of paris  (2CaSO4.H2O)