کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
260007 503648 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effects of asphalt binder and granular material characteristics on foamed asphalt mix strength
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
The effects of asphalt binder and granular material characteristics on foamed asphalt mix strength
چکیده انگلیسی

This paper systematically studies the effects of asphalt foam characteristics and pulverized asphalt pavement (PAP) material attributes on foamed asphalt mix strength. A fracture face image analysis procedure was employed to quantify asphalt dispersion, which was key to establishing the relationships between material microstructural features and measured strengths. Foamability of asphalts was found to be one of the primary factors determining foamed asphalt mix quality. Foams with higher expansion ratios and longer half-life have better dispersion through granular materials, resulting in greater strength improvement. High fines contents in the PAP materials negatively affect mix strength by producing a continuous and weak unbonded mineral filler phase. The microstructural analysis found that typically unquantified physical, chemical and/or mineralogical characteristics of the PAP materials significantly affect asphalt dispersion quality and mastic strength. Therefore, the suitability of PAP materials and available binders for foamed asphalt stabilization should be evaluated for each individual project.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 25, Issue 2, February 2011, Pages 1093–1101
نویسندگان
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