Physicomechanical Assessments and Heavy Metals’ Leaching Potential of Modified Asphalt Binders Incorporating Crumb Rubber and Tin Slag Powders

Table 8

Metal elements’ concentrations on CRP-modified bitumen leachate solution.

Metal elements	Bit. +5% CRP (ppm)	Bit. +10% CRP (ppm)	Bit. +15% CRP (ppm)
Calcium (Ca)	0.271	0.542	0.798
Iron (Fe)	0.045	0.064	0.367
Magnesium (Mg)	0.226	0.314	0.956
Molybdenum (Mo)	0.064	0.062	0.062
Antimony (Sb)	0.112	—	0.049
Selenium (Se)	—	—	—
Titanium (Ti)	0.046	0.047	0.093
Vanadium (V)	0.004	0.004	0.006
Zinc (Zn)	0.084	0.060	0.089