High-Temperature Performance of Asphalt Mixtures: Preliminary Analysis for the Standard Technical Index Based on Gray Relational Analysis Method

Table 3

Testing data of the asphalt mixture Marshall specimen.

Asphalt binders		Asphalt-aggregate ratio	Apparent density	Theoretical maximum density	VV	VMA	VFA
		%	g/cm^3	g/cm^3	%	%	%
Unmodified	PEN20	4.8	2.431	2.542	4.35	14.28	69.5
	PEN50	4.6	2.433	2.547	4.42	14.21	68.7
	PEN90	4.6	2.437	2.553	4.55	14.11	67.8
Modified	SBS I-C	4.9	2.414	2.522	4.30	14.83	71
	SBS I-D	4.9	2.419	2.528	4.33	14.66	70.5
	TPS	5.1	2.409	2.516	4.25	14.97	71.6