White and Coloured Cement:

White cement is established from special raw materials like white chalk and china clay having low contents of iron oxide (less than 1 %).

Colored cements are manufactured by adding suitable mineral pigments (oxide of lead, etc.) to Portland cement during grinding. The proportion of the pigment varies 5% to 10%. The cobalt gives blue color. The iron oxide in different proportions gives brown, red or yellow color. The manganese dioxide gives black or brown colored cement. These cements are costlier than OPC because of specific requirements imposed upon the raw materials and manufacturing process. Following are the uses of white and colored cement:

(a)        They are used within decorative works such as finishing coat of concrete floors, face plaster to walls, etc.

(b)       They are also used within mortars to be used for floors and wall tiles and for ornamental concrete works.