کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4913839 1428774 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Consistent distribution of air voids and asphalt and random orientation of aggregates by flipping specimens during gyratory compaction process
ترجمه فارسی عنوان
توزیع دائمی پوسیدگی های هوا و آسفالت و جهت گیری تصادفی از سنگ شکن ها با تغییر دادن نمونه ها در طی فشرده سازی حفره ای
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
The current Superpave mix design determines the optimum asphalt content that would produce asphalt specimens with total air voids of 4.0% without considering their sizes and distribution within the specimens. In addition, the current Superpave gyratory compaction equipment may produce inconsistent specimens with higher air voids on the top layer than the middle and bottom layers of the specimen. To produce more consistent gyratory specimens, a new approach of compacting both ends of the specimen, rather than the one side, is presented. Based on the automated image analysis of twenty-four specimens, the difference in air voids between top and bottom layers decreased when specimens were compacted on both ends. In addition, the standard deviations of both air voids and asphalt contents throughout the specimen decreased when the specimens were compacted on both ends. Therefore, it can be concluded that the air voids and asphalt contents were more uniformly distributed throughout the specimen when the gyratory specimens were compacted on both ends. Based on the angles between major axes of aggregates and horizontal plane, the aggregates were more randomly oriented when compacted on the both ends.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 132, 1 February 2017, Pages 376-382
نویسندگان
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