بررسی رفتار رئولوژیکی قیرهای اصلاح شده با خاکستر ضایعات صنعتی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه مهندسی عمران، واحد ملارد، دانشگاه آزاد اسلامی، ملارد، تهران، ایران

2 گروه مهندسی عمران، واحد ملارد، دانشگاه آزاد اسلامی، ملارد، تهران، ایران

3 گروه مهندسی عمران، موسسه آموزش عالی رحمان، رامسر، مازندران، ایران

چکیده

هدف از این مقاله بررسی افزودنی خاکستر ذغال سنگ و خاکستر پوسته برنج بر خواص رئولوژیکی و  عملکردی قیر می باشد. در این تحقیق از خاکستر ذغال سنگ و خاکستر پوسته برنج  به عنوان افزودنی در درصدهای (0%، 2%،4%، 6% و 8%) در قیر استفاده شد. جهت بررسی خصوصیات عملکردی قیر آزمایشات درجه نفوذ، نقطه نرمی، مقاومت خاصیت انگمی، حساسیت دمایی، رئومتر برش دینامیکی، رئومتر تیرچه خمشی، ویسکومتر دورانی و آزمایش خزش-باربرداری با تنش چندگانه (MSCR)  انجام شد. نتایج نشان داد نتایج نشان داد پارامتر G*/Sind با افزودن مقادیر خاکستر پوسته برنج افزایش می یابد. در حالیکه افزودن خاکستر ذغال سنگ سبب کاهش مقدار پارامتر G*/Sind می گردد و به ازای افزایش درصد افزودنی روند کاهش برای پارامتر شیارشدگی اتفاق می افتد. همچنین اضافه نمودن خاکستر پوسته برنج سبب کاهش مقادیر G*.Sind و اضافه نمودن خاکستر ذغال سنگ سبب افزایش مقادیر G*.Sind می گردد. . پارامتر (Jnr) با افزودن خاکستر پوسته برنج کاهش می یابد. مقادیر کمتر (Jnr) نشان دهنده مقاومت بیشتر مخلوط ساخته شده با آن قیر یا حساسیت کمتر مخلوط نسبت به شیارشدگی می باشد. نتایج مقادیر بهتری را برای افزودنی خاکستر پوسته برنج نسبت به خاکستر ذغال سنگ نشان می دهد.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of Rheological Behaviour of Bitumen Containing Industrial Waste Ashes

نویسندگان [English]

  • Majid Sattari 1
  • Alireza Ameli 2
  • Seyed Rohalah Moafimadani 3
1 M.Sc., Student, Department of Civil Engineering, Malard Branch, Islamic Azad University, Malard, Tehran, Iran.
2 Department of Civil Engineering, Malard Branch, Islamic Azad University, Malard, Tehran, Iran.
3 Department of Civil Engineering, Rahman Institute of Higher Education, Ramsar,Mazandaran, Iran.
چکیده [English]

The purpose of this paper is to investigate the effect of coal waste ash and rice husk ash on mechanical properties of the stone matrix asphalt mixtures. In this study, of coal waste ash and rice husk ashes was used as a substitute for limestone powder in percentages (0 %, 25 %, 75 %, 75 % and 100 %)in the stone matrix asphalt mixtures. also to prevent drain down of this mixture, the cellulose fibers and SBS polymer fibers were used. in order to investigate the performance characteristics of mixtures the Marshall stability test,  Resilient modulus, indirect tensile strength, moisture  sensitivity, dynamic creep, and wheel tracking tests were performed. the results showed that the replacement of rice husk ash with limestone powder has improved the performance characteristics of the mixture. While the use of coal waste ash is only enhanced the moisture sensitivity of mixtures and it has a negative effect on the performance properties of mixtures.

کلیدواژه‌ها [English]

  • Binder Rheology
  • Coal Waste Ash
  • Rice Husk Ash
  • industrial wastes
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