Retarding additives do not reduce water absorption or interfere with all hydration processes, so they have a limited impact on processability loss. Materials other than cement, water, and aggregate that are used as ingredients in concrete and are added to the batch immediately before or during mixing are called admixtures. It is used to adapt the properties of concrete to your needs. Chemical additives for concrete construction have achieved great success in recent decades. Proper use of admixtures can improve quality, accelerate or retard curing time, improve frost and sulfate resistance, control strength development, improve workability, and improve finishability. This method reduces construction costs and is widely recognized as a means to reduce the occurrence of unforeseen problems during the construction process. Various tests must be carried out to determine the effect of admixtures on the quality of concrete produced using specified working materials, using different construction methods, under expected environmental conditions. there is. Chemical additives such as retarders play an important role in modern concrete materials and technology. Chemical admixtures have improved the quality of the concrete mentioned above and have contributed to the development of new concrete technologies.