Optimal Mix Design and Mechanical Properties of Rapid-Hardening Foam Concrete

Table 7

Results of analysis of variance.

Target parameter	Source of variation	Sum of squares	Degrees of freedom	Mean square	F-value	Significance level (p)
1d compressive strength (MPa)	α	6.2079	2	3.1039	6.99 × 10^15	1.43 × 10^−16
	β	0.0558	2	0.0279	6.28 × 10^13	1.59 × 10^−14
	γ	0.1577	2	0.0788	1.78 × 10^14	5.63 × 10^−15
	δ	0.3125	2	0.1563	3.52 × 10^14	2.84 × 10^−15
3d compressive strength (MPa)	α	7.1061	2	3.5530	1.43 × 10^14	7.00 × 10^−15
	β	0.5040	2	0.2520	1.01 × 10^13	9.87 × 10^−14
	γ	0.2416	2	0.1208	4.86 × 10^12	2.06 × 10^−13
	δ	0.0494	2	0.0247	9.93 × 10^11	1.01 × 10^−12