Concrete pumping has transformed modern construction by enabling faster, safer, and more efficient placement of concrete, particularly in high-rise buildings, bridges, tunnels, industrial facilities, and large infrastructure projects. However, the success of pumped concrete depends not only on the pumping equipment but also on the quality and characteristics of the concrete mix itself. One of the most important components influencing pumpability is the aggregate, with 20 mm aggregate being one of the most widely used sizes in concrete production.