@article { author = {Soleymanikermani, M.R.}, title = {Effect of Rock Salt on Skidding Resistance on the Snow Covered Road Surfaces}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {187-193}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {To make the slippery roads surfaces safe during the winter, highway authorities usually must either apply rock salt (NaCl) or other chemical de-icers to melt ice and snow or spread sand to provide traction. Since usage of these materials may have negative environmental and physical impacts, therefore, their properties must be known to provide adequate space for improvement and to compensate for any short comes. In this research we are only concerning with the physical impact of the issue which is lowering skidding resistance of the surface as a result of applying rock salt to melt the snow and ice. Road surface type snow and ice melt more rapidly on a concrete surface because it gives up heat more rapidly. Since asphalt absorbs more solar radiation, it is therefore have more heat available for melting snow. This is why snow melts rapidly next to bare asphalt pavement areas. Even when the temperature of the  pavement is below freezing point, it holds some heat and can help melting snow and ice. Changing ice or snow into water (brine) requires heat from the air, the sun, the pavement, or traffic friction. The surface temperature of a snow- or ice-covered road determines de-icing salt amounts and melting rates. As temperatures go down, the amount of salt needed to melt a given quantity of ice increases significantly. Using salt brine to pre-wet is becoming more common because of its lower cost. In this research it was established that the presence of salt brine on the surface will lower down the skidding resistance of the surface considerably. It is necessary to have adequate drainage system on the roads that enables the melted snow and ice which have concentration of high amount of salt content to be clear off the surface as soon as possible. It is better to apply salt as needed than to over-treat initially. It has been established that on the location in which the harsh maneuvering, acceleration and deceleration is needed aggregate of higher Polished Stone Value (PSV) be used than it was believed to be used before.}, keywords = {}, title_fa = {تأثیر نمک‌پاشی زمستانی بر مقاومت لغزشی سطح جاده‌ها}, abstract_fa = {پاشیدن نمک (NaCl) و یا پخش مواد شیمیایی (ضد یخ) ، در نقاط پر برف، فعالیت معمولی است که بر روی جاده‌ها در فصل زمستان در سر تا سر جهان صورت می‌گیرد. این مقاله اثرات نمک پاشی در فصل زمستان را بر مقاومت لغزشی سطح جاده‌ها مورد بررسی قرار می‌دهد. دمای برف و یخ موجود بر سطح جاده، مقدار و نسبت مورد نیاز نمک را مشخص می‌کند. هرچه برودت هوا بیشتر باشد مقدار نمک مورد نیاز به طرز قابل توجهی افزایش می‌یابد. در این مقاله، اثر نمک بر مقاومت لغزشی سطح جاده‌ها مورد بررسی قرار گرفته و ثابت شد که حضور محلول نمک بر سطح جاده، مقاومت لغزشی سطح را به طور قابل ملاحظه ای کاهش می‌دهد، و همچنین می‌توان نتیجه گرفت که زهکشی مناسب جاده برای خارج کردن محلول نمک از سطح و برقراری مقاومت لغزشی مناسب در این راستا بسیار مؤثر است تا از سر خوردن وسایل نقلیه که نهایتاً منجر به تصادفات می‌شود جلوگیری شود. از آنجا که حضور محلول نمک بر سطح جاده خطرناک بوده و باعث کاهش مقاومت لغزشی می‌شود، بنابراین، بهتر است از مقدار مورد نیاز این ماده اطمینان حاصل شود تا نیاز به نمک پاشی مجدد نباشد.}, keywords_fa = {مقاومت لغزشی,ضد یخ,محلول نمک,جاده‌ها}, url = {https://www.trijournal.ir/article_11400.html}, eprint = {https://www.trijournal.ir/article_11400_045e6bb003e3d009e4c7d866e7d724ca.pdf} } @article { author = {}, title = {}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {-}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {}, keywords = {}, title_fa = {مسیریابی بهینه سیستم‌های حمل‌و‌نقل در انبارهای اتوماتیک}, abstract_fa = {}, keywords_fa = {}, url = {https://www.trijournal.ir/article_11401.html}, eprint = {} } @article { author = {}, title = {}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {-}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {}, keywords = {}, title_fa = {ارتقای الگوریتم تخصیص بهینه منابع در پروژه‌های 3R}, abstract_fa = {}, keywords_fa = {}, url = {https://www.trijournal.ir/article_11402.html}, eprint = {} } @article { author = {}, title = {}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {-}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {}, keywords = {}, title_fa = {بررسی تأثیر ارتفاع پایه پل‌ها بر دقت روش تک مودی آیین‌نامه آشتو در تحلیل لرزه‌ای پل‌ها و ارائه پیشنهاد برای اصلاح و توسعه روش}, abstract_fa = {}, keywords_fa = {}, url = {https://www.trijournal.ir/article_11403.html}, eprint = {} } @article { author = {}, title = {}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {-}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {}, keywords = {}, title_fa = {تعیین قیود تماس چرخ - محور با ریل به روش هندسی}, abstract_fa = {}, keywords_fa = {}, url = {https://www.trijournal.ir/article_11404.html}, eprint = {} } @article { author = {}, title = {}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {-}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {}, keywords = {}, title_fa = {بررسی اثر مشخصات سنگدانه‌ها در خواص بتن غلتکی مورد استفاده در روسازی راه}, abstract_fa = {}, keywords_fa = {}, url = {https://www.trijournal.ir/article_11405.html}, eprint = {} } @article { author = {}, title = {}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {-}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {}, keywords = {}, title_fa = {کاربرد نظریه خاک غیراشباع در بررسی پایداری خاکریزها}, abstract_fa = {}, keywords_fa = {}, url = {https://www.trijournal.ir/article_11420.html}, eprint = {} } @article { author = {}, title = {}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {-}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {}, keywords = {}, title_fa = {شناسایی معیارهای مؤثر در اولویت‌بندی مقاطع تصادف‌خیز و میزان اهمیت هر یک از آنها بر اساس روش‌های تصمیم‌گیری گروهی}, abstract_fa = {}, keywords_fa = {}, url = {https://www.trijournal.ir/article_11421.html}, eprint = {} } @article { author = {}, title = {}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {-}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {}, keywords = {}, title_fa = {بررسی تئوری استفاده از هیدروژن در موتور جرقه‌ای و تنها آلاینده آن}, abstract_fa = {}, keywords_fa = {}, url = {https://www.trijournal.ir/article_11422.html}, eprint = {} } @article { author = {}, title = {}, journal = {Journal of Transportation Research}, volume = {5}, number = {2}, pages = {-}, year = {2008}, publisher = {}, issn = {1735-3459}, eissn = {2008-3351}, doi = {}, abstract = {}, keywords = {}, title_fa = {بررسی آزمایشگاهی تأثیر تراشه‌های خرده آسفالت بر روی خصوصیات قیر و مخلوط‌های آسفالتی گرم}, abstract_fa = {}, keywords_fa = {}, url = {https://www.trijournal.ir/article_11423.html}, eprint = {} }