ارزیابی آزمایشگاهی خصوصیات شیارشدگی قیرهای اصلاح شده با پلیمر و بررسی رابطه آن با مقاومت شیارشدگی مخلوط آسفالتی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته 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

چکیده

در این تحقیق خصوصیات شیارشدگی قیر و مخلوط آسفالتی مورد ارزیابی قرار گرفت. در این تحقیق، قیرها دارای درجه عملکردی بالای یکسان (PG 76-XX) و مخلوط آسفالتی دارای دانه بندی پیوسته می باشد. سه نوع پلیمر Elvaloy SBS   و SBR و PPAجهت اصلاح قیر انتخاب شدند. آازمایشات نقطه نرمی، رئومتر برش دینامیکی، خزش چندگانه و بازیابی و آزمایش جاروب فرکانس بر روی قیرهای اصلاح شده و آزمایش خزش دینامیکی بر روی مخلوط آسفالتی انجام شد. نتایج نشان داد رتبه بندی پارامترهای قیر و مخلوط برای پارامترهای Jnr , عدد روانی مخلوط یکسان بود. همچنین کاربرد پارامتر G*/Sinδ نیز قابل تامل می باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Experimental Evaluation of Rutting Performance of Polymer Modified Binders and Its Relation to Rutting Resistance of Mixture

نویسندگان [English]

  • Amin Choubdar 1
  • Amin Farajollahi 2
  • Alireza Ameli 2
1 M.Sc.,Grad., 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
چکیده [English]

This study was intended to evaluate the susceptibility of asphalt binders and mixtures to rutting. The binders have the same high PG grade (PG 76-xx) and a dense-graded gradation curve was used to produce the mixtures. Three types of polymers – Elvaloy, SBS and SBR – and polyphosphoric acid (PPA) were selected. The tests included softening point, oscillatory shear (parameter G⁄/sind), multiple stress creep and recovery (Jnr) and flow number (FN). The rankings of binder and mixture parameters (Jnr, G⁄/sind, softening point and FN) are the same only for Jnr and FN, and the applicability of G⁄/sind to modified materials is questionable.

کلیدواژه‌ها [English]

  • Asphalt Binders
  • Performance Grade
  • Rutting
  • Flow Number
  • Nonrecoverable Compliance
  • Polymers
  • Polyphosphoric Acid

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