Concrete remains in its fresh state from the time it is mixed until it sets. It is during this time that the concrete is handled, transported, placed, and compacted. Properties of concrete in its fresh state are very important because it influences the quality of the hardened concrete. Fresh concrete is that stage of concrete in which concrete can be moulded and it is in plastic state. This is also called “Green Concrete.” Consistency of a concrete mix is a measure of the stiffness or fluidity of the mix. It indicates the easiness of flow of concrete. Slump test is commonly used to measure consistency of concrete. Setting of concrete is the transition process of changing of concrete from plastic state to hardened state. Concrete derives its strength by the hydration of cement particles. Air entrainment is used to produce a number of effects in both the plastic and the hardened concrete.