A Comprehensive Study on Polymermodifiedbitumen Blends with PP H030 Mixing Parameters and Homogeneity

Abstract

The effective inclusion of polypropylene (PPH030) into bitumen during road building is essential for improving the qualities of the material. This research examined the impact of mixing factors on the homogeneity and effectiveness of PP-bitumen blends. The experiment conducted by using granules with a size of 4.3 mm. The mixing process took place at temperatures between 158 and 160°C for a duration of 1.5 hours. Nevertheless, this procedure proved inadequate in achieving enough blending and uniformity, resulting in the existence of unabsorbed particulate matter in the mixing nozzle and vessel walls. Further tests were carried out to enhance the mixing process. The temperature was adjusted to a range of 168-175 °C, and the mixing period was prolonged to 2 hours. Additionally, the PP content was increased to 4 percent. The findings showed a significant improvement in consistency, with no visible undissolved particles. In addition, examination of the mixed samples indicated a rise in the softening point from 53.4 to 61.2 °C when the PP content was increased, accompanied by a loss in penetration and elongation capabilities. The comparison with prior findings demonstrated that the adjusted circumstances resulted in a reasonable degree of mixing, as seen by the constant softening point and decreased penetration and elongation values.