ارزیابی مشخصات رئولوژی و قیرزدگی باقی‌مانده قیرهای امولسیون اصلاح‌شده با پلیمر به روش‌های مختلف ساخت

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه مهندسی عمران، دانشکده فنی مهندسی، دانشگاه پیام نور تهران شمال، تهران

2 استاد، دانشکده مهندسی عمران، دانشگاه علم‌و‌صنعت ایران، تهران

3 دانشجوی دکتری، دانشکده فنی مهندسی، دانشگاه پیام نور تهران شمال، تهران

4 دانشجوی دکتری، دانشکده مهندسی عمران، دانشگاه علم‌و‌صنعت ایران، تهران

چکیده

در سال‌های اخیر، مطالعات مختلف توجه خود را بر روش ساخت قیر امولسیونی به‌منظور بالا بردن ویژگی آسفالت سرد متمرکز کرده‌اند. بر این اساس، اصلاح قیرهای امولسیونی با پلیمر به خاطر بهبود بعضی ویژگی‌ها همچون حساسیت دمایی، شکل‌پذیری و مقاومت در برابر قیرزدگی برای آسفالت‌های سرد بسیار مناسب است. در حالت کلی، فرمولاسیون قیرهای امولسیونی اصلاح‌شده پلیمری به نحوه اضافه کردن لاتکس به قیر امولسیونی بستگی دارد. بر این اساس، در این تحقیق، قیر امولسیون پلیمری اصلاح­شده بر پایه روش‌های مختلف تولید شامل اختلاط در آسیاب کلوئیدی (حین اختلاط محلول امولسیفایری و قیر)، پیش­اختلاط با محلول امولسیفایری و پس­اختلاط با قیر امولسیونی در حضور دو نوع امولسیفایر ساخته شدند. نتایج نشان داد که روش پیش‏اختلاط پلیمر در قیر امولسیون نوع 2 و روش حین اختلاط در قیر امولسیون نوع 1 در ویژگی‌های فیزیکی قیر همچون ویسکوزیته سی بولت فیورل، نقطه نرمی و درجه نفوذ و البته ویژگی‌های رئولوژی قیر همچون مدول مختلط، زاویه فاز و نمره عملکرد سطحی نسبت به سایر روش‌های اصلاح پلیمری، عملکرد بهتری داشته است. در نتیجه، نوع امولسیفایر نیز در انتخاب روش ساخت قیر امولسیون پلیمری نقش مهمی دارد. لذا، فرایند طراحی جهت بهینه‌سازی ساخت قیر امولسیون پلیمری برای هر نوع امولسیفایر متفاوت است.

کلیدواژه‌ها

عنوان مقاله [English]

Assessment of Rheological and Bleeding Characteristics of Polymer-modified Bitumen Emulsions Residue by Different Manufacturing Methods

نویسندگان [English]

  • Mahmoud Reza Keymanesh 1
  • Hassan Ziari 2
  • Hossein Zalnezhad 3
  • Mahdi Zalnezhad 4
1 Assistant Professor, Department of Civil Engineering, Payame Noor University, Tehran, I. R. Iran.
2 Professor, Department of Civil Engineering, Iran University of Science and Technology, Tehran, I. R. Iran.
3 PhD Candidate, Department of Civil Engineering, Payame Noor University, Tehran, I. R. Iran.
4 PhD Candidate, Department of Civil Engineering, Iran University of Science and Technology, Tehran, I. R. Iran.
چکیده [English]

In the last few years, several studies have focused their attention on production methods of bitumen emulsion to enhance the cold asphalt properties. Accodrdinly, because of improving some characteristics like temperature susceptibility, ductility and rutting resistance, polymer- modified bitumen emulsion (PMBE) is more sutiable for cold asphalt mixure. Generally, the formulation of PMBE depends on addition methods of the latex. In this study, PMBE is produced based on two types of emulsifier and various manufacturing techniques including soap pre-batching, co-milling, and post-blending. Results showed that soap pre-batching method of type 2 emulsifier and co-milling method of type 1 emulsifier had best performance in physical properties including Saybolt-Furol Viscosity (SFV), softening point and penetration and also rheological properties containing complex modulus (G*), phase angle (δ), rutting parameter (G*/sin δ) and surface performance grade (SPG). Thus, type of emulsifier has an important role in selection of PMBE manufacturing method. So, the design procedure to optimize manufacturing of PMBE is different for each type of emulsifier.

کلیدواژه‌ها [English]

  • Bitumen emulsion
  • Latex
  • Emulsifier
  • Rheology

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سابقه مقاله

  • تاریخ دریافت: 13 خرداد 1399
  • تاریخ بازنگری: 11 آبان 1399
  • تاریخ پذیرش: 11 آذر 1399

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