Concrete batch plants, some known as ‘ready-mix’ plants, blend various ingredients such as sand, gravel, cement and water, in order to form concrete. Most ready-mix plants are of similar design, and utilize cement storage silos, screw conveyors, hoppers and mixers. The finished mix is transferred to a truck, where it continues to be mixed as it is transported to the job site. These plants are usually located close to the projects that they service.