بررسی عوامل تأثیرگذار بر حساسیت رطوبتی مخلوط آسفالتی نیمه گرم (WMA)

نوع مقاله : مقاله مروری

نویسندگان

1 دانشگاه صنعتی نوشیروانی بابل

2 دانشگاه علم وصنعت تهران_ایران

3 هیات علمی دانشگاه صنعتی نوشیروانی بابل

4 دانشگاه علم .و صنعت ایران

چکیده

به دنبال افزایش آلاینده‌ها و نگرانی‌های زیست محیطی و همچنین بالا رفتن قیمت سوخت و انرژی، فن آوری آسفالت نیمه گرم (WMA )به‌عنوان یک فن آوری سازگار با محیط زیست معرفی گردید و امروزه نیز گرایش صنعت روسازی به سمت استفاده از آن بیشتر شده است. فن آوری آسفالت WMA علیرغم کاهش دمای تولید و تراکم روسازی آسفالتی و سایر مزیت‌ها نسبت به آسفالت گرم (HMA) ، دچار ضعف خرابی رطوبتی می‌باشد که یکی از نگرانی‌های اصلی این فن آوری است و استفاده از افزودنی‌های ضد عریان شدگی یکی از پرکاربردترین روش‌ها در جهت کاهش این خرابی می‌باشد. مخلوط آسفالتی WMA از مصالح مختلف قیر، سنگ‌دانه و مواد افزودنی WMA تشکیل می‌شود و بررسی تأثیر هر یک از این مصالح در کاهش حساسیت رطوبتی کمتر مورد توجه و بررسی قرار گرفته است، لذا در این پژوهش با هدف آگاهی بیشتر مهندسین راه سازی در جهت بهبود این معضل در این نوع مخلوط آسفالتی، به بررسی بیشتر عوامل تأثیرگذار در مقاومت رطوبتی مخلوط WMA پرداخته می‌شود. مطالعه‌های انجام شده نشان می‌دهد که نوع سنگدانه (خصوصیات اسیدی یا بازی)، نوع افزودنی WMA و دمای اختلاط و تراکم از مهم‌ترین عوامل تأثیرگذار بر مقاومت مخلوط آسفالتی WMA می‌باشند که به‌طور غیرمستقیم روسازی ساخته شده را تحت تأثیر قرار می‌دهند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

An Investigation of Factors Affecting The Moisture Sensitivity of Warm Mix Asphalt (WMA)

نویسندگان [English]

  • Saeid Sobhi 1
  • afshar yusefi 2
  • saeid hesami 3
  • Mahmood Ameri 4
1 Babol Noshirvani University of Technology
2 Iran University of Science & Technology
3 Nurshirvani Babylon University of Technology
4 دانشگاه علم و صنعت
چکیده [English]

looking for of increased pollution and environmental concerns, as well as rising fuel and energy prices, the Warm Mix Asphalt (WMA) technology, has been introduced as an environmentally friendly technology, and nowadays the direction of the pavement industry has become more widely used. WMA asphalt technology, despite the reduction in production and compaction temperature and other advantages compared to Hot Mix Asphalt (HMA), has a weakness in moisture damage, which is one of the main concerns of this technology, and the use of Anti-stripping additive is one of the most widely used methods to reduce this damage. Asphalt mixtures of WMA are composed of different materials such as bitumen, aggregate and WMA additives. The study on the effect of each of these materials on the reduction of moisture sensitivity less attention has been investigated. Therefore, in this study in order to aware of road engineers to improve this problem with this type of asphalt mixture will be discussed. Studies showed that the type of aggregate (characteristics of acidity or alkalinity), the type of WMA additive, and mixing and compaction temperature were among the most important factors affecting the WMA asphalt mixture resistance, which indirectly affected the pavement.

کلیدواژه‌ها [English]

  • Warm mix asphalt (WMA)
  • Moisture sensitivity
  • Aggregate
  • Bitumen
  • Compaction temperature
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