Asphalt modifiers and additives 

Table from Health Effects of Occupational Exposure to Asphalt. NIOSH Dec00
(adapted from Roberts et al. 1996 with information from Speight 1992a) 

          Type                  Examples 
1. Antioxidants             Calcium salts 
                            Carbon 
                            Lead compounds 
2. Antistripping agents     Amines 
                            Lime 
3. Combinations             Blends of plastics (9) and rubbers (10) 
4. Extenders                Lignin 
                            Sulfur 
5. Fibers                   Manufactured:
                                Cellulose 
                                Fiberglass 
                                Mineral 
                                Polyester 
                                Polypropylene 
                            Natural: 
                                Asbestos 
                                Rock wool 
6. Fillers                  Carbon black 
                            Mineral filler: 
                                Crusher fines 
                                Fly ash 
                                Lime 
                                Portland cement 
7. Hydrocarbons             Hard and natural asphalts 
                            Recycling and rejuvenating oils 
8. Oxidants                 Manganese salts 
9. Plastics                 Ethylene acrylate copolymers 
                            Ethylene propylene 
                            Ethyl-vinyl-acetate 
                            Polyethylene/polypropylene 
                            Polyolefins 
                            Polyvinyl chloride 
10. Rubbers:                Natural rubber 
        Block copolymers    Styrene-butadiene 
        Natural latex       Polychloroprene latex 
        Reclaimed           Styrene-butadiene-styrene, styrene-isoprene-styrene 
        Synthetic latex     Crumb-rubber-modifier 
11. Waste materials         Glass 
                            Recycled tires 
                            Roofing shingles 
12. Miscellaneous           Coal liquefaction products 
                            Components of shale oil 
                            Deicing calcium chloride granules 
                            Petroleum distillates: 
                                Diesel and other gas oils 
                                Gasoline 
                                Kerosene 
                                Naphthas 
                                Stoddard solvent 
                                Shale oil residues 
                                Silicones

source: 
Butler, M., G.Burr, D.Dankovic, A.Lunsford, A.Miller, M.Nguyen, L.Olsen, D.Sharpnack, J.Snawder, L.Stayner, M.H.Sweeney, A.Teass, J.Wess, R.Zumwalde. U.S. Department of Health and Human Services & Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health. Hazard Review, Health Effects of Occupational Exposure to Asphalt. DHHS (NIOSH) Publication No. 2001110 (Dec. 2000)