During the process of mixing concrete, the key is to ensure that the cement remains in a liquid form. This liquid form is retained through a unique rotation of the concrete mixer’s barrel. The process of mixing and agitating the cement components is called batching. There is about a two-hour window in which the batched concrete can remain in the truck’s barrel before it begins hardening. If concrete is left for too long in the truck’s mixer, the consequences will obviously be unwanted. As you prepare to purchase a concrete mixing truck, make sure to spend time familiarizing yourself with the specifics of the vehicle you choose. Always follow the recommendations outlined by the manufacturer to ensure that the cement never hardens prior to being poured.