Cement : Ordinary Portland Cement.

Aggregates : The maximum size of aggregate is generally limited to 20 mm. Aggregate of size 10 to 12mm is desirable for structures having congested reinforcement. Wherever possible size of aggregate higher than 20mm could aslo be used. Well graded cubical or rounded aggregates are desirable. Aggregates should be of uniform quality with respect to shape and grading.

Fine aggregates can be natural or manufactured. The grading must be uniform throughout the work. The moisture content or absorption characteristics must be closely monitored as quality of Self Compacting Concrete will be sensitive to such changes. Particles smaller than 0.125 mm i.e. 125 micron size are considered as FINES which contribute to the powder content.

Mixing Water : Water quality must be established on the same line as that for using reinforced
concrete or prestressed concrete.

Chemical Admixtures : Superplaseizers are an essential component of Self Compacting Concrete to provide necessary workability. The new generation superplasticizers termed poly-carboxylated ethers (PCE) is particularly useful for Self Compacting Concrete.

Other types may be incorporated as necessary, such as Viscosity Modifying Agents (VMA) for stability, air entraining agents (AEA) to improve freeze-thaw resistance, and retarders for Control of Setting.