EVALUATION OF SBR AND PS-MODIFIED ASPHALT BINDERS AND HMA MIXTURES CONTAINING SUCH BINDERS
محل انتشار: مجله تحقیقات کاربردی، دوره: 1، شماره: 9
سال انتشار: 1394
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 473
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شناسه ملی سند علمی:
JR_ARJ-1-9_003
تاریخ نمایه سازی: 26 اسفند 1394
چکیده مقاله:
The present study was conducted to assess the performance of HMA modified by styrene-butadiene-rubber (SBR) and polystyrene (PS) polymers. Four different ratios; namely 1, 3, 5, and 7% of each polymer by weight of asphalt were blended with 40/50 paving grade asphalt. Both unmodified and modified asphalt binders were subjected to rheological andhomogeneity tests such as penetration, ductility, softening point, percent loss of heat and air, and temperature susceptibility. The performance tests including, Marshall stability, Marshall quotient (MQ), tensile strength, compressive strength, and flexural strength. The results show that the performance of SBR and PS modified asphalt mixtures are superior thanconventional mixtures. The moisture susceptibility and temperature susceptibility can be reduced by the implication of SBR and PS polymers inthe asphalt mixture. A polymer content of 5% for SBR and 5% for PS by weight of asphalt are recommended for the improvement of HMA performance
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نویسندگان
A. A. Abdul-Mawjoud
Department of Civil Engineering, College of Engineering, University of Mosul, Iraq
L. S. Thanoon
Department of Civil Engineering, College of Engineering, University of Mosul, Iraq