کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4918120 1428751 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fracture toughness determination of modified HMA mixtures with two novel disc shape configurations
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Fracture toughness determination of modified HMA mixtures with two novel disc shape configurations
چکیده انگلیسی
In this paper two circular shape test specimens are designed and examined for experimental determination of mode I fracture toughness (KIc) in different modified hot mix asphalt (HMA) materials. The suggested configurations are (i) edge notched disc bend (ENDB) specimen subjected to three-point bend loading and (ii) edge notched diametrically compressed (ENDC) disc specimen. It was shown that both specimens are suitable for conducting fracture toughness experiments on HMA mixtures at low temperature conditions. In general, all the investigated modifiers enhanced the low temperature cracking performance of tested HMA mixtures such that, the nano-clay additive had the most effect on increasing the fracture toughness value relative to the control mixture. However, the KIc data obtained from the ENDB specimen were slightly greater than the corresponding values of ENDC specimen. It was demonstrated that this difference is attributed to the loading configuration (i.e. bending and compressive loads applied to the ENDB and ENDC specimens, respectively). By considering the combined influence of singular (KI) and first non-singular (T) components in the crack tip stress/strain field, the KIc data obtained from these two specimens were predicted by means of the maximum normal strain theory.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 155, 30 November 2017, Pages 789-799
نویسندگان
, , ,