بررسی تاثیر سیمان و الیاف حاوی آربوسِلِ چرب بر ویژگی‌های مکانیکی و رطوبتی مخلوط‌های آسفالتی سرد امولسیونی | ||
| پژوهش های زیرساخت های عمرانی | ||
| مقاله 13، دوره 9، شماره 2 - شماره پیاپی 17، دی 1402، صفحه 111-123 اصل مقاله (2 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22091/cer.2023.9372.1477 | ||
| نویسندگان | ||
| علیرضا معتمدنیا1؛ حمید شیرمحمدی* 2؛ مرتضی اسدامرجی3 | ||
| 1دانشجوی دکتری عمران، پژوهشگاه حمل و نقل طراحان پارسه، تهران، ایران. | ||
| 2دانشیار، گروه عمران، دانشکده فنی، دانشگاه ارومیه، ایران. | ||
| 3استادیار، دانشکده عمران، آب و محیط زیست، دانشگاه شهید بهشتی، تهران، ایران. | ||
| چکیده | ||
| آسفالت‌های سرد امولسیونی، دارای مزایا و معایبی می‌باشند. مزایای این نوع مخلوط‌ها، به دمای کم تولید، ملاحظات زیست‌محیطی و قابلیت حمل آن برای مسافت‌های زیاد مربوط می‌شود. یکی از دلایل اصلی عملکرد ضعیف این نوع آسفالت، ضعف رطوبتی است. نفوذ آب از عملیات شکست قیر امولسیونی ممانعت به عمل می‌آورد و در این راستا، مقاومت مخلوط در برابر رطوبت کاهش می‌یابد. در تحقیق حاضر، پس از تعیین درصد قیر بهینه به روش مارشال اصلاح شده، به میزان 1 تا 3 درصد وزنی، مخلوط آسفالتی سیمان و 0.3 تا 0.5 درصد وزنی، الیاف حاوی آربوسل‌های چرب به مخلوط اضافه گردید. نمونه‌های حاصل، تحت آزمایش‌های میزان استحکام مارشال، روانی، شاخص مارشال، لاتمن اصلاح شده و نیکلسون قرار گرفت. برمبنای نتایج به‌دست آمده از آزمایش‌ها، استحکام مارشال 47.88 درصد، شاخص مارشال تا میزان قابل‌توجه 139 درصد، چسبندگی 41 درصد، نسبت مقاومت کششی غیرمستقیم 21 درصد، افزایش و روانی36.47 درصد کاهش می‌یابد. این تحقیق، استفاده همزمان سیمان، 3 درصد و الیاف حاوی آربوسل چرب، 0.3 درصد در مخلوط‌های آسفالت سرد را توصیه می‌کند. | ||
| کلیدواژه‌ها | ||
| آسفالت سرد امولسیون؛ لاتمن اصلاح شده؛ استحکام مارشال؛ آربوسل چرب؛ نیکلسون | ||
| عنوان مقاله [English] | ||
| Investigating the Effect of Cement and Fibers Containing Fatty Arbocell on the Mechanical and Moisture Properties of Cold Emulsion Asphalt Mixtures | ||
| نویسندگان [English] | ||
| Alireza Motamadnia1؛ Hamid Shirmohammadi2؛ Morteza Asadamregi3 | ||
| 1PhD Candidate, Tarrahan Parseh Transportation Research Institute, Tehran, Iran. | ||
| 2Associate Professor, Department of civil Engineering, Faculty of Engineering, University of Urmia, Urmia, Iran. | ||
| 3Assistant Professor, Faculty of Civil, Water and Environmental Engineering, University of Shahid Beheshti, Tehran, Iran. | ||
| چکیده [English] | ||
| Cold emulsion asphalts have advantages and disadvantages. The advantages of this type of mixture are related to the low temperature of production, environmental considerations, and its portability to long distances. One of the main reasons for the poor performance of this type of asphalt is its moisture content. The water penetration hinders the fracture of emulsion bitumen, and after that, the mixture's resistance to moisture is reduced. The present research used the modified Marshall method to determine the optimal bitumen percentage. For this reason, one to three percent by weight of the asphalt-cement mixture and 0.3 to 0.5 percent by weight of fiber mixture containing fatty arbocell were added. The resulting samples were subjected to the Marshall strength, Marshall index modified Lottman and Nicholson tests. Based on the results, the Marshall strength was 47.88%, the Marshall index was 139%, adhesion was 41%, the ratio of indirect tensile strength was 21%, and the fluidity was 36.47%. According to the data obtained from this research, it is suggested that 3% cement and 0.3% fatty arbocell fibers should apply in cold asphalt mixtures. | ||
| کلیدواژه‌ها [English] | ||
| Cold Emulsified Asphalt Modified Lottman, Marshall Stability, Fatty Arbocel, Nicholson | ||
| مراجع | ||
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