A Methodology for Determination of Resilient Modulus of Asphaltic Concrete

Table 1

Average properties of DAC and SDAC mix of extracted cores.

Property	Specimen
	DAC	SDAC
Average diameter (mm)	90	90
Average height (mm)	180	180
Bulk density (g/cc)	2.36	2.33
Air voids (%)	4	6
Aggregate voids filled with bitumen (%)	75	66
Bitumen content (%)	5.5	5.4
Poisson’s ratio	0.4	0.4
Penetration value (°C)	58	67
Softening point (°C)	55	47
Temperature susceptibility (A)	0.038	0.049
Penetration index (PI)	0.347	−1.299
Temperature difference (°C)	25	17
Bitumen stiffness (N/m^2)	5000000	4000000
Specific gravity of aggregates	2.75	2.75
Specific gravity of Bitumen	1.007	1.007
Binder volume (cc)	12.9	12.5
Aggregate volume (cc)	81.1	80.2
Stiffness modulus of the mix (MN/m^2)	931.5	750.4
Marshall stability (kg)	765	725
Flow value	2.2	8.35