کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
258211 503613 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An analytical–empirical investigation of the bleeding mechanism of asphalt mixes
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
An analytical–empirical investigation of the bleeding mechanism of asphalt mixes
چکیده انگلیسی


• The bleeding of asphalt concrete is investigated using image analysis.
• An X-ray CT system was used to capture the internal structure of the specimens.
• We characterize the air voids distribution in asphalt mixes.
• We evaluate the influence of gradation on air voids distribution.

In literature on asphalt mixes, bleeding is considered to occur mostly due to poor construction practices. Also, other than empirical and qualitative observations, there have been little attempts to understand its mechanism. The aim of this study was to evaluate the analytical–empirical bleeding mechanism of asphalt mixes. This evaluation is based on the distribution of air voids in asphalt mixes. An X-ray computed tomography (X-ray CT) system was used to capture the internal structure of the specimens and image analysis techniques were used to quantify the distribution of air voids. The method used was based on image analysis. Firstly, the specimen was scanned using X-ray CT. Then, dynamic loading was applied at temperatures 5, 25, 40 and 60 °C and the specimens were scanned again after loading. At the end, image processing and analysis software were used to quantify the distribution of air voids in the X-ray CT images. The stress–strain results obtained from dynamic loading and the variations in the distribution of air voids in specimens clearly demonstrate the influence of the distribution of air voids on asphalt bleeding.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 45, August 2013, Pages 138–144
نویسندگان
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