Ready-mixed concrete is made of cement, aggregate, water, and appropriate amounts of additives accurately measured according to the designed mix ratio, and is mixed centrally in a mixing station to form a homogeneous mixture. According to strength grade, it is divided into C10, C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75, C80, C85, C90, C95, and C100. It is the main raw material for on-site structural forming, generally transported to the construction site by mixer trucks, and after curing and hardening, forms concrete products with the strength and durability required by the design.