پژوهشنامه حمل و نقل

پژوهشنامه حمل و نقل

بهینه‌سازی چند هدفه مشخصات عملکردی آسفالت حاوی افزودنی‌های بازیافتی با استفاده از روش پاسخ سطح

نوع مقاله : مقاله پژوهشی

نویسنده
گروه مهندسی عمران، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
چکیده
‌استفاده از افزودنی‌های پودر لاستیک و پودر کربن در روسازی، با وجود مزایای فنی و زیست‌محیطی، با محدودیت‌هایی مواجه است که نیاز به بهینه‌سازی درصد مصرف آنها دارد. هدف این پژوهش، بهینه‌سازی خصوصیات مکانیکی آسفالت به‌منظور افزایش طول عمر و کیفیت روسازی و کاهش هزینه‌های تعمیر و نگهداری بر مبنای نتایج آزمایشگاهی است. متغیرهای ورودی شامل درصد پودر کربن و پودر لاستیک و متغیرهای خروجی شامل مدول برجهندگی، مقاومت رطوبتی، انرژی شکست، عمق شیارشدگی و کرنش‌های تجمعی آسفالت هستند. مدل ریاضی فرآیند برای هر مشخصه مکانیکی آسفالت با استفاده از روش پاسخ سطح تعیین و دقت آن با تحلیل واریانس بررسی شد. نتایج نشان داد که تحلیل آماری RSM از دقت بالایی برخوردار بوده و متغیرهای خطی CRM و ACP تأثیر قابل توجهی بر رفتار مکانیکی و عملکردی آسفالت دارند. شرایط بهینه برای بیشینه‌سازی مشخصات مکانیکی آسفالت به‌صورت ACP برابر 4/44% و CRM برابر 9/14% پیشنهاد شد. مقایسه شرایط بهینه‌سازی‌شده و حداقل آزمایشگاهی نشان داد که استفاده از ترکیب بهینه پودر لاستیک و پودر کربن، به ترتیب 9%، 53% و 69% بهبود در مقاومت رطوبتی، انرژی شکست و مدول برجهندگی و همچنین 48% و 44% کاهش در عمق شیارشدگی و کرنش پلاستیک ایجاد می‌کند. به‌طور کلی، نتایج این تحقیق نشان می‌دهد که بهینه‌سازی انرژی شکست، مدول برجهندگی و مقاومت رطوبتی، همراه با کاهش شیارشدگی، می‌تواند منجر به افزایش کیفیت و طول عمر روسازی و کاهش هزینه‌های تعمیر و نگهداری شود.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Multi-Objective Optimization of Performance Characteristics of Asphalt Containing Recycled Additives Using Response Surface Method

نویسنده English

Amir Amini
Department of Civil Engineering, Na.C, Islamic Azad University, Najafabad, Iran.
چکیده English

The use of rubber powder and carbon powder additives in pavement, despite its technical and environmental advantages, faces limitations that require optimization of their usage percentage. The aim of this research is to optimize the mechanical properties of asphalt in order to increase the lifespan and quality of the pavement and reduce maintenance costs based on laboratory results. The input variables include the percentage of carbon powder and rubber powder, and the output variables include the modulus of elasticity, moisture resistance, fracture energy, rutting depth, and asphalt cumulative strains. The mathematical process model for each asphalt mechanical characteristic was determined using response surface method (RSM) and its accuracy was checked by variance analysis. The results showed that the statistical analysis of RSM is highly accurate and the linear variables of CRM and ACP have a significant effect on the mechanical and functional behavior of asphalt. The optimal conditions for maximizing the mechanical characteristics of asphalt were proposed as ACP equal to 44.4% and CRM equal to 14.9%. The comparison of the optimized and minimum laboratory conditions showed that the use of the optimal combination of rubber powder and carbon powder, respectively 9%, 53% and 69% improvement in moisture resistance, fracture energy and modulus of elasticity, as well as 48% and 44% reduction in the depth of rutting. and creates plastic strain. In general, the results of this research show that the optimization of fracture energy, modulus of elasticity and moisture resistance, along with the reduction of rutting, can lead to an increase in the quality and lifespan of the pavement and a reduction in maintenance costs.

کلیدواژه‌ها English

Sustainable Development
Modified Asphalt
Environment
Performance Characteristics
Multi-Objective Optimization
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