Effect of Flyash Addition on Mechanical and Gamma Radiation Shielding Properties of Concrete

Table 1

Physical properties of Portland cement.

Physical test	Requirement IS: 8112-1989
Fineness (retained on 90 µm sieve)	10 max.
Time of setting (min.)
Initial	30 min.
Final	600 max.
Compressive strength (MPa)
28 days	33 min.
91 days	43 max.
Specific gravity	3.15