Mobile Ready Mix refers to concrete that is being mixed on the job site. Each batch of ready-mixed concrete is tailor-made according to the specifics of the contractor.
As early as 1909, concrete was delivered by a horse-drawn mixer that used paddles turned by the cart’s wheels to mix concrete on route to the jobsite. In 1916, Stephen Stepanian of Columbus, Ohio, developed a self-discharging motorized transit mixer that was the predecessor of the modern ready-mixed concrete truck. Development of improved ready-mixed trucks was hindered by the poor quality of motor trucks in the 1920s. During the 1940s, the availability of heavier trucks and better engines allowed mixing drum capacities to increase, which in turn allowed ready-mixed concrete producers to meet the high demand for concrete caused by World War II.