cement mixer machine with a large revolving drum in which cement is mixed with other materials to make concrete
A machine, often mounted on a truck, having a revolving drum in which cement, sand, gravel, and water are combined into concrete.A machine with a rotating drum in which the components of concrete are mixed.
A concrete mixer (also commonly called a cement mixer) is a device that homogeneously combines cement, aggregate such as sand or gravel, and water to form concrete. A typical concrete mixer uses a revolving drum to mix the components. For smaller volume works portable concrete mixers are often used so that the concrete can be made table to the contractor. Newer "front discharge" trucks (or "rightway's") have controls inside the cab of the truck to allow the driver to move the chute in all directions. The first rightway mixer was designed and built by Royal W. Sims of Holiday, Utah.
A six-axle truck has three "lift axles" -- the first two axles behind the cab (the pusher axles) and the rear-most axle (the tag axle) -- which can be lifted out of the way for off-road operation. When loaded, these axles distribute the weight of the truck. This distribution of weight is essential. Otherwise, roads most traveled on, by vehicles of this size begin to break down. As an added benefit, these axles provide the driver better control of the vehicle during transport. The lift axles are equipped with brakes, and a system that lets them actually turn with the truck during turns, allowing maneuvering that would otherwise be nearly impossible.
Stephen Stepanian filed a patent application for the first truck mixer in 1916. Trucks weigh 20–30,000 pounds (9–13.5 tonnes), and can carry roughly 40,000 pounds (18 tonnes) of concrete although many varying sizes of Mixer Truck are currently in use. The most common truck capacity is six cubic metre.
Most concrete mixers in the UK are limited to a speed of 56 miles per hour.An episode of MythBusters checks if dynamite can be used to clean out dried concrete from inside of a mixer truck. It is concluded that it can be of limited use. For the finale, an excessive amount of explosive is used, and is detonated from a very, very long distance away. Only the engine Concrete Batching Machine
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