Truck Mixer Truck mixers are used to mix and transfer concrete from the Concert batching plant to the place of project. Usually these mixers are filled with water and aggregates and they are mixed while moving to the project. But nowadays using modern batching plant, ready concrete also can be loaded into the truck mixer. In this way concrete is mixed and then filled in to the truck. Truck mixers should be near to the place of projects , so that the concrete be used very soon after loading before it get stiff and firm, if concrete get stiff in the mixer it can’t be used. Truck mixers are most used in big projects such as road construction, bridge building and other structural projects for providing the needed concrete of the project.