کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4676020 1634486 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Unilateral heat-transfer asphalt pavement for permafrost protection
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Unilateral heat-transfer asphalt pavement for permafrost protection
چکیده انگلیسی

Much radiation absorption and accumulation by asphalt pavement result in serious deteriorations of embankment and permafrost along the Qinghai–Tibet Highway (QTH). In order to reduce these adverse effects, a unilateral heat-transfer (UHT) asphalt pavement is proposed in this paper. It is a tri-layered asphalt pavement with a decreasing conductivity from top to bottom. The pavement with such a conductivity gradient has a capability of UHT. Comparative laboratory experiments under lamplight were carried out to validate the UHT capability. The simulation result of summer pavement heat-absorbing showed that, comparing with the contrast group (CG), the temperature under the experimental group (EG) could be reduced by 2.5 °C. The simulation result of winter embankment heat-releasing showed that the temperature on the surface of the EG was 1.0 °C higher than that on the surface of the CG. The calculation of heat absorption and heat conduction in specimens demonstrated that the EG had a better cooling potential than the CG. These results demonstrate that the CG can not only aid in buffering the radiation heat into the embankment, but also help the accumulated heat to be released outward. If the technology can be applied in permafrost areas, it may provide a positive method to protect the embankment and permafrost.


► Provide a solution to solve heat absorption and accumulation of asphalt pavement.
► It is feasible to decrease temperature in permafrost.
► The gradient thermal conductivity pavement is convenient to be constructed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cold Regions Science and Technology - Volume 71, February 2012, Pages 129–138
نویسندگان
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