Cement mixers are also commonly referred to as concrete mixer trucks. They are basically trucks that have a built-in mixer that is used to combine water, cement, and sand or gravel, to form concrete. These concrete mixers offer a reliable solution to outdoor construction needs where concrete is needed like in road constructions, bridge constructions, or laying a building foundation. Concrete mixers are used to mix and distribute concrete or cement to exactly where it is needed. Modern concrete mixer trucks are usually loaded with ready mixed concrete while others are designed to work in-transit by mixing concrete while on their way to a specific destination.