It is a material that helps in many tasks inside the concrete by using it is controlled in what is known as the time of doubt and also in what is known as the workability of concrete, all modern mixtures depend on these types of additions therefore it has been found that they are useful in compensating some unwanted properties of concrete used in hot climates such as the speed of doubt And the lack of operational, where types of chemical additives are used for concrete Which includes general-purpose chemicals which are those that reduce the demand for water for a certain operating potential called "water reducers" and materials that trap air inside concrete to provide resistance to freezing and thawing called "air inputs" and chemicals that control the time and rate of strength gain of concrete and are Two types are either "accelerators" or "disincentives" Apart from these chemicals, there are other materials for special purposes, including viscosity modification materials and additives that contribute to reducing shrinkage and some materials that are added to dampen corrosion of the iron element inside the concrete and in addition to other materials that contribute to the coloring of concrete
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