Evaluation of roofing shingles in hot mix asphalt

摘要: Recycling waste materials is a viable solution to the expensive and environmentally unacceptable disposal problem for these products. Approximately 9,500,000 tons (86.184 billion kg) of roofing shingles are produced each year. The cost between $18 $60 per ton dispose materials. Reclaimed contain hard crushed aggregate, high viscosity asphalt, fibers that may be desirable production hot mix asphalt (HMA) pavements. One source was evaluated use in HMA mixes. used were 100% manufacturer's postproduction fiberglass shingle scraps. properties mixture with compared conventional (no shingle) mixture. amount can added limited by percentages (-0.075 mm) found shingles. A softer virgin binder should account much stiffer comparable mixtures. In addition, stone mastic Even added, still need polymer modified or fiber, such as cellulose, control draindown.