US transportation agencies have been increasingly using recycled asphalt shingles (RAS) in hot mix asphalt (HMA) applications over the last 25 years. Initial use of RAS started with recycled postmanufacturers shingles, but now agencies are showing a growing interest in using post-consumer (tear-off) RAS in asphalt applications. Post-consumer asphalt shingles typically have 20 to 30 percent asph...

US transportation agencies have been increasingly using recycled asphalt shingles (RAS) in hot mix asphalt (HMA) applications over the last 25 years. Initial use of RAS started with recycled postmanufacturers shingles, but now agencies are showing a growing interest in using post-consumer (tear-off) RAS in asphalt applications. Post-consumer asphalt shingles typically have 20 to 30 percent asph...

Enhancing Green Paving in Oklahoma Using Recycled Asphalt Shingles Prof. Musharraf Zaman School of Civil Engineering and Environmental Science Each year, an estimated 11 million tons of old asphalt shingles from roofs are disposed of in the United States. In Oklahoma, it costs between $50 and $150 per ton, depending on size and kind of debris, to dispose of these materials in landfills. Recent ...

s92,1 15363,1980.search, April 1981. 59. “Recyclers Beat the Clock.” Engineering News Record,November 6,1980. 60. “D-Cracked Concrete Pavement Recycled for Less.” Highway andHeavy Construction, April 1981. 61. “Asphalt Pavement Milled and Recycled on Same Project.” Highway and Heavy Construction, August1981. 62. “In Place Recycling Cuts Paving Cost, Time.” Highwa...

The use of recycled materials in pavement construction has seen, over the years, a significant increase closely associated with substantial economic and environmental benefits. During the past decades, many transportation agencies have evaluated the effect of adding Reclaimed Asphalt Pavement (RAP), and, more recently, Recycled Asphalt Shingles (RAS) on the performance of asphalt pavement, whil...

a r t i c l e i n f o Cold recycling technique represents the most environmental friendly solution for pavement rehabilitation nowadays. In fact, this technique allows the use of the highest percentage of reclaimed asphalt avoiding the energy consumption related to aggregates heating required by the traditional hot mix asphalt design. The mix design represents a key phase of the cold mix produc...

In recent decades, economic development and population growth in the world has led to the expansion of road networks. Therefore the use of optimum methods for repairing and maintenance of these roads is considered as an important value. Today one of the options in this regard, is the use of asphalt recycling technology. The present study which took place in the summer of 2015 in Iran, Lorestan ...

Recycled asphalts were evaluated based on SHRP binder specification. DSR (Dynamic Shear Rheometer) and BBR (Bending Beam Rheometer) tests were carried out on samples of the recycled asphalts under three conditions: original binder, RTFOT (Rolling Thin Film Oven Test) residue and RTFOT+PAV (Pressurized Aging Vessel) residue. PG (Performance-Graded) classification was conducted. New straight asph...

ii To my family, friends and professors who helped me throughout this experience iii ACKNOWLEDGEMENTS This research project was made possible with the help of many supporting people throughout the process. I wish to express my gratitude firstly to my supervising professor, Dr. Hosin " David " Lee for the support and advice needed to start and finish this project. I would also like to thank the ...

Cold in-place recycling (CIR) has become an attractive method for rehabilitating asphalt roads that have good subgrade support and are suffering distress related to nonstructural aging and cracking of the pavement layer. Although CIR is widely used, its use could be expanded if its performance were more predictable. Transportation officials have observed roads that were recycled under similar c...