THE EFFECT OF WASTE FOUNDRY SAND ON THE DENSIFICATION OF CEMENT MORTARS

A large part of the metal casting production is made with sand mold. The main task of the used mold material is to reveal the shape of the casting cavity and to store this shape until the liquid metal is poured and solidified. Molds mainly come from three materials. The first one is the refractory sand particles, the second is the binder that is naturally found in the sand or later added, and the last is the water that binds the sand particles together to make the sand a suitable mold material. These casting sands are generally in the range of 0.05-2 mm in size. Approximately 2-3% of the casting sand that has reached the end of its life after casting is recycled while the rest is stored in the factories or accumulated in the open areas and released to the nature. There are negative effects on the economy if these wastes are not recycled. Many projects and studies have carried out in order to reduce these damages given to the environment and to the economy and to expand the recycling of these waste materials.