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Determination of the acceptable range of mixing and compaction temperatures for modified asphalt mixture with styrene butadine styrene (SBS)

Author : Hasan H. Joni and Ethar K. Shaker

Pages : 1777-1783
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The temperatures of mixing and compaction of modified asphalt mixture are an important factor in the construction process. The temperature should be chosen in the specified range because the increase of the temperature above the limit may cause the drainoff of the asphalt from the mixture. On the other hand , the decreased temperatures lead to poor in coated aggregate particles. This research has been made to predict models for mixing and compaction temperatures for SBS modified asphalt mixture and study the effect of asphalt content, SBS content and filler type on the temperatures. One type of asphalt cement grade (40-50) used and polymer styrene butadiene styrene (SBS) with (3%, 4% and 5%) by weight of asphalt cement. Two types of tests were carried for asphalt mixtures (mix coating test and compaction of asphalt mixture test). From experimental test results, it is observed that the mixing and compaction temperature of the modified asphalt mixture has a negative relationship with asphalt content. On the other hand, the relationship between the temperatures and SBS content is a positive relationship. The mixing and compaction temperature of the modified asphalt mixture with limestone dust has been result more than the mixture with Portland cement.

Keywords: SBS-polymer, mixing and compaction temperatures, Superpave, modified asphalt mixtures,Ross count method

Article published in International Journal of Current Engineering and Technology, Vol.7, No.5 (Sept/Oct 2017)

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