Road King Technologies Road King GPS tracks the location of concrete trucks – and much more. By Mark Lawton, Senior Editor at Knighthouse Publishing When it comes to delivering ready-mix concrete, timing is everything. Ready-mix concrete is a mix of cement, water and aggregates such as sand, gravel, or crushed stone. It is mixed at a batch plant and put in a barrel truck that rotates the mixture while it is being delivered to the construction site. 3 January 201911 January 2024 Admin 1 min read Exclusive Features