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

Table 5

Technical standards for an asphalt mixture designed by the GTM method (0.7 Mpa).

Pilot projects	Technical indicators
Dimensions of the specimen (mm)	101.6 × 100
Standard density	GTM final density about rotational compaction
Porosity (%)	2.0∼4.0
Saturation VFA (%)	60∼80
Rotation stability GSI	≯1.05
Shear stability GSF	≮1.30
The minimum VMA requirement corresponding to the nominal particle size (mm)
Nominal particle size (mm)	26.5	19.0	16.0	13.2
Mineral material clearance rate VMA (%)	10.0	10.0	10.5	11.0