بررسی عملکرد مخلوط آسفالت بازیافتی اصلاح شده با جوانساز و الیاف

نوع مقاله : مقاله پژوهشی

نویسندگان

1 School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran

2 دانشکده عمران، دانشگاه علم و صنعت ایران، تهران، ایران

3 گروه عمران، واحد نوشهر، دانشگاه آزاد اسلامی، نوشهر، ایران

چکیده

امروزه با توجه به کمبود منابع انرژی نقش اقتصادی و زیست‌محیطی استفاده مجدد از خرده مصالح بازیافتی آسفالت بر کسی پوشیده نیست. در این مطالعه به بررسیخصوصیات عملکردی مخلوط­های آسفالتی بازیافتی حاوی 50 و 100 درصد تراشه آسفالت اصلاح شده با 06/0، 12/0 و 18/0 درصد الیاف شیشه و پلی­الفین و روغن سایکلوژن به عنوان جوانساز پرداخته شده است. برای این کار آزمایش­های مدول برجهندگی، حساسیت رطوبتی و خزش دینامیکی بر روی مخلوط­های آسفالتی بازیافتی اصلاح شده با جوانساز و الیاف انجام شد. نتایج حاکی از آن بود که استفاده از جوانسازها باعث کاهش مقاومت مخلوط­های آسفالتی در برابر شیارشدگی به میزان 30%،کاهش مقاومت کششی غیر مستقیم به میزان 23%، کاهش مدول برجهندگی به میزان 19% و افزایش حساسیت رطوبتی به میزان 5% می­شود. بااین‌حال، اثر منفی جوانسازها بر خصوصیات حساسیت رطوبتی، مقاومت کششی غیرمستقیم، شیارشدگی و مدول برجهندگی با استفاده از الیاف جبران‌پذیر است. همچنین بهترین نتایج مربوط به زمانی بود که مخلوط­های آسفالتی با استفاده از 12/0 درصد الیاف ترکیبی شیشه و پلی الفین مسلح شده بودند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation of the Performance Properties of Recycled Asphalt Mixtures Modified with Rejuvenator and Fibers

نویسندگان [English]

  • Hassan Ziari 1
  • Ali Moniri 2
  • Hassan Divandari 3
1 School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran
2 School of Civil Engineering, Iran University of Science and technology, Tehran, Iran
3 Department of Civil Engineering, Nowshahr Branch, Islamic Azad University, Nowshahr, Iran
چکیده [English]

In the modern era, due to the shortage of natural resources and the damage of the environment, the benefits of recycling asphalt material is not negotiable. In this research study, the performance properties of asphalt mixtures containing 50% and 100% of reclaimed asphalt pavement modified with Cyclogen as rejuvenator and different percentage of glass-Polyolefine fiber (0.06%, 0.12% and 0.18%) was investigated. For this purpose, resilient modulus, moisture susceptibility and dynamic creep tests was conducted on the manufactured asphalt mixtures. The results showed that using rejuvenator led to decrease in resilient modulus, rutting resistance, moisture susceptibility criterion and indirect tensile strength of asphalt mixtures. However, the negative impact of the rejuvenator on rutting resistance, resilient modulus and moisture sensitivity was compensated by using fibers. The moisture resistance of asphalt mixtures was also improved by adding fiber in the mixtures. The optimum amount of glass-Polyolefine fiber in asphalt mixtures was determined as 0.12%.

کلیدواژه‌ها [English]

  • Recycled asphalt mixtures
  • reclaimed asphalt pavement
  • RAP
  • rejuvenator
  • fiber modified asphalt mixture
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