ASSESSMENT OF THE HOT MIX ASPHALT PROPERTIES USING REED PLANT MODIFIED ASPHALT

Abstract

Many researchers’ attention was drawn by the process of improving the characteristics and the performance of hot mix asphalt. In this research, Reed Plant Ash (RPA) and Reed Plant Powder (RPP) were used as a substance to optimize the characteristics of asphalt at (5, 10, 15, and 20) % by asphalt weight. The laboratory work included two parts to get the requirements of the research: the first part is the physical properties for pure and modified asphalt. The second part is the prepared specimen of HMA with pure and the best percent of modified asphalt according to the Marshall criteria using limestone dust at 7% as a filler to the surface layer. The study found that the HMA with modified asphalt by 10% RPP has more effects on its performance by improving the Marshal Stability, volumetric properties, tensile strength ratio, and retained Marshall Stability rather than control mix and HMA with modified asphalt by 15% RPA.