بهینه‌سازی پارامتر شیارشدگی قیر اصلاح شده با پودر لاستیک با استفاده از روش سطح پاسخ (RSM)

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار، گروه مهندسی ‌عمران، دانشگاه ارومیه، ارومیه

2 دانشجوی کارشناسی‌‌ارشد، گروه مهندسی عمران، دانشگاه ارومیه، ارومیه

3 دانش‌آموخته کارشناس ارشد، دانشکده علوم و فناوری‌های نوین، دانشگاه شیراز، شیراز

4 دانش‌آموخته کارشناسی، دانشکده مهندسی عمران، دانشگاه تبریز، تبریز

چکیده

اصلاح قیر با افزودنی‌های مختلف یکی از متداول‌ترین روش‌ها برای بهبود رفتار آن است. یکی از افزودنی‌های مورد استفاده در اصلاح قیر پودر لاستیک است که موجب افزایش مقدار مقاومت شیارشدگی قیر می‌شود. هدف از انجام این پژوهش شناسایی فاکتورهای مؤثر بر روی خصوصیات مقاومتی قیر در برابر شیارشدگی و بهینه‌سازی این پارامتر با انجام مدل‌سازی در دمای 64 درجه سلسیوس با استفاده از پودر لاستیک می‌باشد. برای این منظور از روش بهینه طراحی آزمایش، روش سطح پاسخ (RSM) با در نظر گرفتن چهار فاکتور شامل دمای اختلاط، زمان اختلاط، سرعت اختلاط و درصد وزنی پودر لاستیک و نیز یک پاسخ، پارامتر شیارشدگی با تولید 30 نمونه قیر اصلاح شده بهره گرفته شده و آزمایش رئومتر برشی دینامیکی (DSR) روی نمونه‌های پیر نشده انجام شده است. نتایج این پژوهش نشان می‌دهد که مدل‌سازی‌های انجام شده از دقت خوبی برخوردار بوده و فاکتور درصد وزنی برای پارامتر شیارشدگی از سایر فاکتورها و برهم‌کنش آنها مؤثرتر می‌باشد. همچنین برای بهینه‌سازی پارامتر شیارشدگی، با در نظر گرفتن سرعت و دمای اختلاط در سطح پایین و زمان اختلاط در سطح بالا، می‌توان به بیشترین مقدار این پارامتر در درصد وزنی مشخص پودر لاستیک دست یافت.

کلیدواژه‌ها


عنوان مقاله [English]

Optimization of Rutting Parameter for Crumb Rubber Modified Binder Using Response Surface Methodology (RSM)

نویسندگان [English]

  • N. Solatifar 1
  • R. Azadedel 2
  • M. Khalili 3
  • M. Rahbarnia 4
1 Assistant Professor, Department of Civil Engineering, Urmia University, Urmia, Iran
2 M.Sc., Student, Department of Civil Engineering, Urmia University, Urmia, Iran
3 M.Sc., Grad., School of New Science & Technology, Shiraz University, Shiraz, Iran
4 B.Sc., Grad., Faculty of Civil Engineering, Tabriz University, Tabriz, Iran
چکیده [English]

Modification of binder with various additives is a very common method for improving its behavior. Crumb rubber is one of the additives which increase the rutting resistance of binder. The main objective of this study is to identify the factors affecting the resistance characteristics of binder regarding rutting and optimization of this parameter by modeling its behavior at 64°C using crumb rubber. For this purpose, optimum Design of Experiments (DOE) method, i.e. Response Surface Methodology (RSM) was utilized taking into account four factors, including mixing temperature, mixing time, mixing speed and content percentage (by weight) of crumb rubber, as well as one response, rutting parameter. As a result, 30 modified binder samples were produced and Dynamic Shear Rheometer (DSR) test was conducted on the unaged samples. Results show that developed models have good prediction accuracy and the content of crumb rubber is more effective rather than other factors and the interaction of them. For optimization of rutting parameter, considering the mixing temperature and mixing speed at a low level and mixing time at a high level, the maximum rutting parameter could be achieved in a certain content percentage of crumb rubber.
 
 

کلیدواژه‌ها [English]

  • Crumb Rubber Modified Binder (CRMB)
  • Binder Rheology
  • Rutting
  • Design of Experiments (DOE)
  • Response surface methodology (RSM)

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