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

Table 7

Difference in bulk density for the two methods of asphalt mixture design.

Percentage increase of GTM forming density relative to Marshall compaction in different asphalt ratios (%)
Gradation number	Oil-stone ratio
	3.5	4.0	4.5	5.0	Average
1	3.36	2.64	2.62	1.52	2.54
2	2.75	2.60	2.46	2.15	2.49
3	2.84	3.33	2.40	2.59	2.79
4	2.60	2.88	2.87	2.05	2.60
Average	2.89	2.86	2.59	2.08	2.60