Laboratory Evaluation of Aging Behaviour of SBS Modified Asphalt

Table 6

Correlation of microstructure indexes, toughness, and tenacity with aging temperature.

Aging time	Microindexes	Macroindexes	Correlation coefficient	Significance
TFOT 3 h	Area	Toughness	0.988	0.097
		Tenacity	0.995	0.052
	Area ratio	Toughness	0.985	0.111
		Tenacity	0.994	0.039
TFOT 5 h	Area	Toughness	0.979	0.129
		Tenacity	0.947	0.210
	Area ratio	Toughness	0.989	0.095
		Tenacity	1	0.015
TFOT 7 h	Area	Toughness	0.958	0.186
		Tenacity	0.992	0.076
	Area ratio	Toughness	0.970	0.156
		Tenacity	0.996	0.047
TFOT 10 h	Area	Toughness	0.996	0.054
		Tenacity	0.997	0.051
	Area ratio	Toughness	0.971	0.154
		Tenacity	0.997	0.049