Transit Mixed Concrete

“Transit mixing” refers to concrete that is mixed, either wet or dry, en route to a job site. A transit mix truck carries a mixer and a water tank from which the driver can, at the proper time, introduce the required amount of water into the mix. The truck picks up the dry ingredients at the batch plant together with a slip which tells how much water to introduce to the mix upon arrival at the site. The mixer drum is kept revolving en route and at the job site so that the dry ingredients do not segregate. Transit mix trucks are part of the battalion’s equipment inventory and are widely used on all but the smallest concrete jobs assigned to a battalion. A large concrete job is shown in Figure 14.