Comparison of Asphalt Mixtures Designed Using the Marshall and Improved GTM Methods

Table 8

Results of a rutting test on the selected asphalt mixtures.

Gradation number	Design method		Test temperature (°C)	Test pressure (MPa)	Dynamic stability (mm/time)	Deformation rate (%)
1	Marshall method	Light load	60	0.7	1512	8.0
		Overload	60	0.7	2080	8.4
	GTM method	0.7 MPa	60	0.7	3315	5.2
2	Marshall method	Light load	60	0.7	1632	9.6
		Overload	60	0.7	2172	9.1
	GTM method	0.7 MPa	60	0.7	3480	5.7
3	Marshall method	Light load	60	0.7	1690	8.1
		Overload	60	0.7	2356	8.4
	GTM method	0.7 MPa	60	0.7	3320	5.0
4	Marshall method	Light load	60	0.7	828	10.8
		Overload	60	0.7	1940	9.6
	GTM method	0.7 MPa	60	0.7	3753	5.6