What's the difference between white cement and ordinary cement?
The typical feature of white cement is high whiteness, with bright color, generally used for a variety of architectural decoration materials, painting, sculpture, a typical floor, terrazzo, white cement can be used to produce white and colored concrete, is the largest cement production decoration.
The main chemical composition of Portland cement clinker is calcium oxide, silica, alumina and iron oxide. Calcium oxide mainly derived from calcareous raw materials, such as limestone, chalk, marl; alumina and silica from aluminum silicate containing substances, such as clay, blast furnace slag and fly ash; iron oxide is used in sulfuric acid production of sulfur iron slag. For the content of calcium oxide production of Portland cement lime materials in 52%; silicon oxide content of clay in raw materials up to about 57%, the alumina content is less than 20%. In order to reduce the calcination temperature and to produce part of the melt during calcination, a small amount of iron oxide is often added. Of raw materials but also control the content of alkali and Magnesium Oxide, Magnesium Oxide is content in the cement clinker should be less than 5%, total alkalinity (Na2O+K2O) for general cement should be less than 1.2% of low alkali cement should be less than 0.6%.
White portland cement as the raw meal with the proper components till the partial melting of the calcium silicate as the main ingredient, the iron content in clinker less addition of gypsum, white water ground made of rigid cementitious material. When grinding cement, allow limestone not to exceed 5% of the cement weight. White cement is mostly ornamental, and its manufacturing process is much better than ordinary cement. The gap is mainly used to hook white tiles, is generally not used in the wall, the reason is not high strength. It is available in the building materials market or decoration materials shop.
