Effect of Nano-CaCO₃ on the Mechanical Properties and Durability of Concrete Incorporating Fly Ash

Table 6

Results of the variance analysis based on compressive strength.

Factors	3 d compressive strength				7 d compressive strength				28 d compressive strength
	SS	DF	MS	F	SS	DF	MS	F	SS	DF	MS	F
A	249.9	2	125	664	432.6	2	216.3	570.3	478.3	2	239.1	232
B	12.9	2	6.4	32.2	27.0	2	13.5	35.0	27.0	2	13.5	13.1
C	27.9	2	11.0	74.1	28.0	2	14.0	36.9	8.6	2	4.3	4.1
Error	0.38	2	0.19	—	0.76	2	0.38	—	2.06	2	—	—
Total	291.1	8	—	—	488.3	8	—	—	515.8	8	—	—

Significance criteria: F_0.05 (2, 8) = 19; F_0.01 (2, 8) = 99.