Imparts pozzolanic activity and CSH gel creation, accelerating setting. Enhances early stage compressive strength, improves pumpability, reduces rebound, provides reduction in thickening time and decreases permeability. Provides bleed and segregation control. Recommended Grades (NS6)15, (NS6)15, (NS7)15, (NS7)15 C, (NS8)20, (NS8)20, (NS20)40, (NS20)40