مدل‌سازی رفتار خستگی مخلوط‌های آسفالتی حاوی سربارۀ کورۀ قوس الکتریک با استفاده از مفهوم انرژی

نوع مقاله : پژوهشی

نویسندگان

1 دانشگاه مهندسی فناوری های نوین قوچان

2 دانشگاه تربیت مدرس

3 دانشگاه حکیم سبزواری

4 دانشگاه تربت حیدریه

چکیده

در این پژوهش به بررسی رفتار خستگی مخلوط­های آسفالتی حاوی سربارۀ کورۀ قوس الکتریک پرداخته شده است. پس از ارزیابی خصوصیات سربارۀ فولادی، پنج سری مخلوط آسفالتی با درصدهای وزنی مختلف سرباره (جایگزین بخش درشت‌دانۀ مصالح آهکی) تهیه شد. با استفاده از آزمایش خمش چهار نقطه‌ای، رفتار خستگی مخلوط­ها در حالت کرنش کنترل شده ارزیابی شد. سپس با استفاده از عمرخستگی­های به‌دست‌آمده، مدل­های پیش‌بینی عمرخستگی توسعه داده شد. همچنین مدل خستگی بر اساس نتایج آزمایش کشش غیرمستقیم، مدول برجهندگی و بر پایه­ی مفهوم انرژی شکست ارائه گردید. نتایج این مطالعه نشان داد که استفاده از سرباره، منجر به بهبود رفتار خستگی مخلوط آسفالتی می­شود. همچنین مدل­های توسعه داده شده دقت خوبی در پیش‌بینی عمرخستگی دارد. مدل­ به‌دست‌آمده از نتایج آزمایش کشش غیرمستقیم و مدول برجهندگی نیز نشان داد که می­توان از پارامتر انرژی شکست برای تعیین عمرخستگی مخلوط­های آسفالتی حاوی سرباره استفاده نمود.

کلیدواژه‌ها


عنوان مقاله [English]

Development of Fatigue Predictive Models for Asphalt Concrete Mixes Containing Electric Arc Furnace Steel Slag Based on Fracture Energy Concept

نویسندگان [English]

  • Morteza Jalili Qazizadeh 1
  • Amir Kavussi 2
  • Aliasghar Sadeghi 3
  • hamid farhad 4
1 Quchan University of Advanced Technology
2 Tarbiat Modares University
3 Hakim Sabzevari University
4 University of Torbat Heydarieh
چکیده [English]

This research was conducted in order to evaluate fatigue resistance properties of asphalt mixes containing Electric Arc Furnace (EAF) steel slag. After evaluating properties of EAF steel slag, five sets of mixes were prepared in laboratory. Each set consisted of a combination of a control limestone aggregate mixed with a specific amount of EAF steel slag. Four points bending beam fatigue testing was performed on all mixes (at strain controlled mode). Based on fatigue lives, fatigue predicting models were developed. Moreover, a fatigue prediction model which was obtained from indirect tensile test, resilient modulus and was based on fracture energy was developed. The results showed that the inclusion of EAF in mixes improved fatigue life of mixes considerably. Very good correlations were observed between responses and fatigue life of mixes. In addition, models based on fracture energy (DEf/DEIDT) predicted reasonably well fatigue life of mixes containing EAF materials

کلیدواژه‌ها [English]

  • Asphalt mixture
  • EAF slag
  • Fatigue model
  • Fracture Energy
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