These properties are also interrelated and must be maintained for a required period of time after mixing.  To achieve these properties, the material selection, proportioning and quality control including production control are critical. 

The three essential fresh properties required by SCC are:

¶ Filling Ability:- the concrete must have the ability to flow and completely fill all parts within the formwork under its own weight without leaving voids. As it is highly fluid it has the ability to flow considerable distances both horizontally and upwards and fill vertical elements from the bottom.

¶ Passing Ability:- the concrete containing the required aggregate size must have the ability to flow through and around restricted spaces between steel reinforcing bars and other embedded objects under its own weight and without blocking or segregation.

¶ Segregation Resistance:- the concrete must be able to satisfy both the filling ability and passing ability requirements while it still remains homogeneous both during transport and placing and after placing.

Paste viscosity (measure of the speed of flow) is another important property, which although not essential in defining SCC, it can nevertheless influence the passing ability, segregation resistance and cohesiveness of SCC. Sufficient viscosity is required within an SCC concrete to ensure that aggregates are fully suspended within the paste and thus enhance the other important properties of SCC.