Additive selection in ready mixed concrete

In this experimental study, it was aimed to produce a concrete with high strength, suitable workability and reliability in ready-mixed concrete plants using silica fume and fly ash fluidizing additives. A total of 9 sets of experiments were conducted. The cubes are 15x15x15 cm in size. Slip was kept constant in the 15-18 cm range. For this purpose, 9 series of concrete are produced in case of substituting 1.25% super and hyper-fluidizer as chemical additives, 5%, 7.5%, 10% silica fume as mineral additives and 20%, 30%, 40% fly ash with cement., 3., 7., 28., 56. and 90. pressure resistances were tested on days. In addition, the compressive strength gains of these series were compared. The results of the experiment showed that fly ash has a healing effect on the processing of fresh concrete and can produce positive results in the long term in terms of its strength properties. Silica fume negatively affected the workability of fresh concrete, but it produced good results in the short term in terms of strength properties. Key Words: In Ready-Made Concrete, Addıtıve, Selection