Effect of Atmospheric Pressure on Performance of AEA and Air Entraining Concrete

Table 3

Physical properties of fly ash.

Fitness (%)	Water demand ratio (%)	Density (g·cm^−3)	Percentage of compressive strength (%)
			7 days	28 days
7.9	98	2.3	61.3	72.3

Strength ratio between test mortar with fly ash (30% by mass of cement) and base mortar at 28 days of age.