پژوهشنامه حمل و نقل

پژوهشنامه حمل و نقل

ارزیابی و مقایسه خصوصیات دوام و شکست بتن آسفالتی بازیافتی جوانسازی شده با دو نوع روغن ضایعاتی و مواد ضد عریان شدگی آهک هیدراته و زایکوترم

نوع مقاله : مقاله پژوهشی

نویسندگان
علی شکری 1
حسن طاهرخانی 2
1 دانش‌آموخته کارشناسی ارشد، گروه مهندسی عمران، دانشگاه زنجان، زنجان، ایران
2 دانشیار، گروه مهندسی عمران، دانشگاه زنجان، زنجان، ایران
10.22034/tri.2025.497613.3310
چکیده
این تحقیق به مقایسه تاثیر دو نوع ماده ضد عریان شدگی شامل آهک هیدراته و زایکوترم و دو نوع ماده جوانساز شامل روغن موتور ضایعاتی و روغن خوراکی ضایعاتی بر عملکرد بتن آسفالتی حاوی 50% تراشه آسفالتی ضایعاتی پرداخته است. نمونه‌های ساخته شده تحت آزمایش‌های مقاومت کششی در شرایط خشک و مرطوب بعد از اعمال 1، 5 و 7 سیکل ذوب و یخبندان، افت وزنی کانتابرو در شرایط خشک و مرطوب و آزمایش خمش نیمدایره‌ای در دمای 25 درجه سانتیگراد قرار گرفته‌اند. نتایج نشان می‌دهند که مقاومت کششی مخلوط بازیافتی حاوی روغن خوراکی ضایعاتی بیشتر از روغن موتور ضایعاتی بوده و تاثیر نوع ماده ضد عریان شدگی بر مقاومت کششی بستگی به نوع جوانساز دارد. همچنین، روغن موتور ضایعاتی مقاومت به آسیب رطوبتی را بیشتر از روغن خوراکی افزایش می‌دهد و تاثیر زایکوترم نیز از آهک هیدراته در کاهش حساسیت رطوبتی بیشتر است. از نظر مقاومت به سیکلهای ذوب و یخبندان و مقاومت به شن‌زدگی افزودنی آهک هیدراته عملکرد بهتری از زایکوترم نتیجه می‌دهد. روغن موتور ضایعاتی عملکرد بهتری نسبت به روغن خوراکی از نظر مقاومت به شن‌زدگی دارد، ولی نوع روغن برای مقاومت در برابر سیکلهای یخبندان و ذوب عامل موثری نیست. نتایج آزمایش شکست با خمش نیمدایره نشان داد که مخلوط حاوی آهک هیدراته انرژی شکست بیشتری از مخلوط حاوی زایکوترم داشته و روغن موتور ضایعاتی نیز از نظر انرژی شکست عملکرد بهتری را نسبت به روغن خوراکی ضایعاتی نتیجه می‌دهد. اما، از نظر شاخص مقاومت به ترک خوردگی زایکوترم از آهک هیدراته بهتر و روغن خوراکی ضایعاتی از روغن موتور ضایعاتی بهتر است.
کلیدواژه‌ها
آهک هیدراته
بتن آسفالتی بازیافتی
روغن خوراکی ضایعاتی
روغن موتور ضایعاتی
زایکوترم

موضوعات

عنوان مقاله English

Evaluation and comparison of durability and fracture properties of recycled asphalt mixture rejuvenated with two types of waste oils and containing anti striping additives of hydrated lime and zychotherm

نویسندگان English

Ali Shokri 1
Hasan Taherkhani 2
1 M.Sc., Grad., Civil Engineering Department, University of Zanjan, Zanjan, Iran.
2 ssociate Professor, Civil Engineering Department, University of Zanjan, Zanjan, Iran.
چکیده English

This research has investigated the comparison of two types of anti striping additives, namely, hydrated lime filler and zychotherm, and two types of rejuvenating oils including waste engine oil and waste cooking oil, on the performance of recycled asphalt concrete containing 50% of reclaimed asphalt pavement (RAP). The samples of mixtures were undergone indirect tensile strength test in dry and and conditioned after applying 1, 5 and 7 cycles of freeze-thaw, Cantaboro loss test in dry and wet condition, and semi-circular bending (SCB) test at 25°C. The results show that the indirect tensile strength of recycled mixtures containing waste cooking oil is more than the mixtures containing waste engine oil, and, the effect of anti-stripping agent depends on the rejuvenating agent. Furthermore, the waste engine oil results in higher moisture damage resistance than waste cooking oil, and, hydrated lime leads to more resistance against moisture damage than zychotherm. In terms of resistance against freeze-thaw cycles, hydrated lime results in better performance than zychotherm; while type of rejuvenating oil is significant. SCB test results reveal that the mixtures containing hydrated lime results in higher fracture energy than zychotherm; and, the waste engine oil performs better than waste cooking oil. However, in terms of cracking resistance index, zychotherm has resulted better performance than hydrated lime and waste cooking oil has resulted better than waste engine oil.

کلیدواژه‌ها English

Recycled Asphalt Concrete
Waste Cooking Oil
Waste Engine Oil
Zychotherm
Hydrated Lime
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