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

Table 7

Range and variance analyses of the flexural strength.

Factors	K and R values					Sources of variation
	K1	K2	K3	K	R	SS	DF	SD	F
A	6.10	5.18	3.76	15.04	2.34	8.34	2	4.17	222.36
B	5.02	5.05	4.97	15.04	0.07	0.01	2	0.01	0.21
C	5.16	5.08	4.80	15.04	0.36	0.21	2	0.11	5.71
Error	—	—	—	—	—	0.08	4	0.02	1.79
Total	—	—	—	—	—	8.63	8	—	—

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