White Portland cement

White cement is a member of the Portland cements and is characterized by its low iron oxide content. White cement was invented by Walter Dyckerhoff and 1931 first sold under the brand name Dyckerhoff white.

PREPARATION AND USE

White cements are made ​​from very low ferrous raw materials ( Fe2O3 content < 0.1%) and used mainly for terrazzo, concrete and white plaster. He is not only suitable for light colored preparations, but also offers color pigments also much easier to color than gray Portland cement. This makes you look especially in the production of colored terrazzo advantage.

The production of white cement is more expensive by far. In addition to the specific commodity requirements, the manufacturing processes are thermally much more expensive due to their lower amount of output.

An essential process step for the production of white cement and to prevent unwanted discoloration of the cement is the extremely rapid cooling of falling from the rotary tube furnace hot clinker. Normally the oven falling clinker is dropped into a water basin with surrounding water to be cooled. This produces fumes and Brüdengase that need to be cooled down and some major procurement problems raise the countries in just who appreciate the white cement as: Especially in the Middle East and around the Mediterranean White Cement is an important construction material since white reflects the sun and the color purity in high prestige in society is.

Now are also resource-saving production methods on the market that replace the water by a gas-cooled process in a cooling drum.