دانلود مقاله ISI انگلیسی شماره 68379
عنوان فارسی مقاله

پوشش بسیار نازک در تگزاس

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
68379 2015 9 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Very Thin Overlays in Texas
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Construction and Building Materials, Volume 95, 1 October 2015, Pages 108–116

کلمات کلیدی
روکش نازک؛ دوره اصطکاک نفوذ پذیر؛ آسفالت ماتریس سنگ ؛ SMA؛ PFC
پیش نمایش مقاله
پیش نمایش مقاله پوشش بسیار نازک در تگزاس

چکیده انگلیسی

TxDOT is expanding its use of Very Thin Overlays (VTO) as they are economically viable in resurfacing operations. Currently, the VTO mixes are placed at thicknesses of 25 mm (or less) rather than 50 mm mats and they are 30% less expensive per square yard than the traditional dense graded materials. The thin mats are also ideal in many urban situations and highly desirable for many maintenance applications. This paper summarized the requirements and rational of the specifications that were developed to ensure successful thin overlay projects. To evaluate the performance of VTO mixtures, three field projects were selected and mixtures were designed for each location using local materials. The VTO performance to date has been very good with excellent skid resistance and crack resistance. Like any overlay, the final IRI is impacted by the pre-existing ride, but the typical range of reduction on roughness is about 35–50%. To mitigate low skid and bleeding of existing seal coat, fine PFC option (19 mm) with a high air void of greater than 20% was constructed. The free asphalt did not migrate to the surface and the thin PFC did increase skid resistance by 400% and substantially reduced tire-pavement noise. District staffs are very pleased with the VTO performance to date, more pavement sections have been scheduled to place the same VTO mixes.

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