COMPATIBILITY AND RHEOLOGICAL STUDY OF ASR ASPHALT BINDER

When junk automobiles are shredded to recover the ferrous and nonferro us metals for recycling, a large quantity of nonmetallic residue, comm only called automotive shredder residue (ASR), is generated. Because A SR mostly contains plastic and rubber related materials, and the addit ion of plastic and scrap rubber from waste tires as a road material ha s been proven to be effective in solving existing pavement related pro blems, attempts were made to examine the feasibility of ASR as a road material additive. As a part of this effort, compatibility, rheologica l, and leaching properties of ASR modified asphalt were studied. The p hotomicrographs and Tg of ASR modified asphalt demonstrated some compa tibility between ASR and asphalt. Dynamic mechanical analysis indicate d that rutting and aging properties of asphalt should improve with the addition of ASR. The toxicity characteristics leaching procedure test indicated that leaching levels of various metals from ASR modified as phalt were well below the Environmental Protection Agency regulatory l evel.