Evaluation of Long Term Ageing of Asphalt Mixtures Containing EAF and BOF Steel Slags
عنوان مقاله: Evaluation of Long Term Ageing of Asphalt Mixtures Containing EAF and BOF Steel Slags
شناسه ملی مقاله: JR_IJTE-2-3_006
منتشر شده در شماره 3 دوره 2 فصل Summer در سال 1393
شناسه ملی مقاله: JR_IJTE-2-3_006
منتشر شده در شماره 3 دوره 2 فصل Summer در سال 1393
مشخصات نویسندگان مقاله:
Seyed Ali Ziaee - Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
Amir Kavussi - Associate Professor, Dept of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
Morteza Jalili Qazizadeh - Assistant Professor, Quchan University of Advanced Technology, Department of Engineering, Quchan, Iran
Abolfazl Mohammadzadeh Moghadam - Assistant Professor, Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
خلاصه مقاله:
Seyed Ali Ziaee - Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
Amir Kavussi - Associate Professor, Dept of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
Morteza Jalili Qazizadeh - Assistant Professor, Quchan University of Advanced Technology, Department of Engineering, Quchan, Iran
Abolfazl Mohammadzadeh Moghadam - Assistant Professor, Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
This study was conducted in order to evaluate the effects of long term ageing on toughness and resilient modulus of asphalt concrete mixtures containing Electric Arc and Basic Oxygen Furnace steel slags. After initial evaluation of the properties of steel slags using X-ray Diffraction andScanning Electric Microscope, eleven sets of laboratory mixtures were prepared. Each set wastreated replacing various portions of limestone coarse aggregates of the mixture (≥ 2.36 mm) withsteel slags. The main laboratory program consisted of the determination of resilient modulus at three testing temperatures of 5, 20 and 40˚C (ASTM D4123) and indirect tensile strength of the samples at 20˚C. In order to evaluate the long term performance of mixtures containing slags, thespecimens were subjected to ageing according to AASHTO PP2 standard method. Results showedthat the peak tensile strength, area up to peak tensile strength and total dissipated energy density of the specimens containing Electric arc furnace slag were greater than the control mixtures. Fracture energy was almost the same for both mixes containing basic oxygen furnace slag and limestone.Results also indicated that the resilient modulus of mixtures increased along with an increase in slag contents in asphalt mixtures. The ratio of aged to unaged resilient modulus of the specimensdecreased upon increasing slag contents. It was concluded that mixtures containing electric arcfurnace slag exhibited less susceptibility to ageing compared with mixtures containing basic oxygen furnace slag and limestone. At 5oC, the highest ratio belonged to control mixtures, whichmight indicate that at lower temperatures, the susceptibility to ageing of the control mixtures were more pronounced
کلمات کلیدی: EAF and BOF slag, resilient modulus, IDT, fracture energy, ageing
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/406433/