Reuse of Zeolite By-Products Derived from Petroleum Refining for Sustainable Roads

Table 3

Main physical and mechanical characteristics of the HMA used as a control.

Properties	AC 22 35/50 S
Optimal bitumen content (% over mix weight)	4.03
Bulk density (mg/m^3), EN 12697-6	2.477
Air void content (%), EN 12697-8	4.1
Aggregates void content (%), EN 12697-8	13.7
Filler/bitumen ratio	1.0
Marshall stability (kN), EN 12697-34	17.79
Marshall deformation (mm), EN 12697-34	4.1