Rheological Evaluation of Modified Bitumen by EVA and Crumb Rubber Using RSM Optimization

Table 5

ANOVA table for DSR tests.

Regression characteristics	Temp (/sinδ ≥ 2.2 kPa)					Temp (/sinδ ≤ 5000 kPa)
	DF	SS	MS	F-value	value	DF	SS	MS	F-value	value
Regression	5	73.3121	14.6624	27.00	≤0.001	5	200.135	40.027	6.11	0.017
Linear	2	63.3742	31.6871	58.36	≤0.001	2	190.833	95.417	14.56	0.003
Square	2	4.0573	2.0287	3.74	0.079	2	9	4.526	0.69	0.532
Interaction	1	5.8806	5.8806	10.83	0.013	1	0.052	0.250	0.04	0.851
Residual error	7	3.8010	0.5430			7	0.250	6.552
Lack-of-fit	3	1.8010	0.6003	1.20	0.416	3	45.865	14.622	29.24	0.004
Pure error	4	2.0000	0.5000			4	43.865	0.500
R-Sq	95.07%					81.36%