علي قره داغي

The application of WMA technology in conjunction with recycled asphalt pavement (RAP) not only contributes to the conservation of natural resources but also significantly mitigates environmental concerns by reducing greenhouse gas emissions and energy consumption. This research aims to eva‎luate the impact of polyethylene terephthalate (PET) granules, replacing 50% and 100% of the fine aggregate by volume, as well as waste engine oil as a rejuvenator, on the performance of warm mix asphalt mixtures containing 40% recycled asphalt pavement. A variety of tests were conducted, including the Illinois flexibility index test, indirect tensile Cracking Test at 25°C temperature (on aged and unaged samples), indirect tensile tests in wet and dry conditions, the semicircular bend test has been used at temperatures of 0, -12 and -24 degrees Celsius. The results of indirect tensile tests on asphalt mixtures containing rejuvenator and polyethylene terephthalate (PET) granules, in combination with RAP, showed a 45% increase in tensile strength ratio to the control warm mix asphalt mixture. In the low-temperature performance and fracture toughness tests, only the RAP increased the fracture toughness, while the rejuvenator and polyethylene terephthalate weakened the resistance to low-temperature cracking. Using the Illinois Flexibility Index, the fatigue cracking performance of asphalt mixtures was eva‎luated. The mixture containing 50% PET granules demonstrated the highest resistance to fatigue cracking, exhibiting a 90% improvement compared to the control mixture. The addition of rejuvenator to mixtures containing RAP, as well as mixtures containing RAP with 50% and 100% polyethylene terephthalate (PET) replacement, respectively resulted in a 64%, 60%, and 159% increase in the flexibility index compared to the warm mix asphalt containing RAP. indirect tensile Cracking Test results on unaged samples and the Illinois flexibility index showed a 90% correlation. After long-term aging, the 100% polyethylene terephthalate replacement in the mixture containing RAP and rejuvenator resulted in a 55% increase in the CTindex compared to the sample containing RAP with rejuvenator.

گرانول پلي اتيلن ترفتالات , تراشه آسفالتي بازيافتي , جوانساز ضايعاتي , آسفالت نيمه‌گرم , پيرشدگي بلند مدت

polyethylene terephthalate granules , recycled asphalt pavement , waste rejuvenator , warm mix asphalt , long term aging

aligharedaghi

neda kamboozia-mahmoud ameri