کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
6480473 1428759 2017 13 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Recycling long-term-aged asphalts using bio-binder/plasticizer-based rejuvenator
ترجمه فارسی عنوان
بازیافت آسفالت های طولانی مدت با استفاده از روان کننده های مبتنی بر زیست باند / پلاستیسر
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کلمات کلیدی
بیو جوان کننده، اموال رئولوژیک، گروه های عاملی، تجزیه و تحلیل کامپوننت، توزیع وزن مولکولی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


- Bio-rejuvenator with a dosage of 10% is sufficient to restore the viscosity of the PAV-aged asphalt to its original level.
- The fatigue resistances of aged asphalts cannot be improved to the level of that of the virgin asphalt.
- The carbonyl and sulfoxide indexes of the PAV-aged asphalt can be reduced by adding the bio-rejuvenator.
- The asphaltene content of the PAV-aged asphalt can be reduced by adding the bio-rejuvenator.

In this study, a bio-binder/plasticizer-based rejuvenator was used to restore the properties of a long-term-aged asphalt binder. The chemical properties of the rejuvenated-asphalt binder were then analyzed. Pen70 asphalt and an SBS-modified asphalt were used in this study as virgin asphalt binders. A pressure-aging-vessel test was conducted to simulate the long-term aging process of the asphalt samples. The aged asphalt binders were blended with a bio-rejuvenator at dosages of 5% and 10%. The results show that adding the bio-rejuvenator with a dosage of 10% helps in restoring the workability and rutting resistance of the long-term-aged asphalt to their original level. The fatigue resistance and low-temperature cracking resistance of the aged asphalt binder also improved. The bio-rejuvenation helped reduce the oxygenated-group peak-area intensities of the aged asphalt. The results of the component analysis show that the asphaltene content of the aged asphalt reduced by adding the bio-rejuvenator. The molecular-weight-distribution patterns were further examined. The results show that the bio-rejuvenator helps increase the medium-weight molecular content whereas the high-weight molecular content remains unchanged.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 147, 30 August 2017, Pages 117-129
نویسندگان
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