زهراء هاتف فالح الكعبي

This study, presented the findings of laboratory research on asphalt that has been treated by Styrene-Butadiene-Styrene (SBS), as well as asphalt that has been modified by Nanomaterials (Nano Clay (NC)). Several tests were performed to study the different effects that polymer and nanoparticles have on the characteristics of asphalt. The bitumen graded 40/50 penetration is prepared to control the binder samples that are used. Other samples are asphalt binder combined with a concentrated mixture of SBS. Polymer modified binders were prepared with varying percentages of SBS 3%, 4%, and 5%, respectively. Additionally, the binder is combined with varying proportions of NC to produce nano-modified binders with concentrations of 0.25, % 0.5 %, and 1 %, respectively. Several tests including penetration, softening point, ductility, and kinematic viscosity, were carried out. When comparing the values of SBS and NC, it can be observed that the effect of SBS on asphalt continues to increase as the quantity of SBS in the asphalt is raised, and it also makes the asphalt harder as the amount of SBS in the asphalt continues to climb, whereas the effect of NC on asphalt stops working once it reaches its specific limit 0.5%. Asphalt modified by polymers (SBS) grows its resistance to high and low temperatures, while asphalt modified by NC develops its resistance to high temperatures clearly, while the low temperature is slightly less resistant. © 2024 American Institute of Physics Inc.. All rights reserved.

Asphalt pavement suffers some performance problems such as rutting creep cracking and fatigue, when exposed to frequent traffic load and weather changes, therefore many researchers tried to resolve these shortfalls by applying different technology including nanotechnology to improve asphalt performance. In this study a modified asphalt was studied adding to the asphalt nano clay nano clay at four different percentages (0.25, 0.5, 1, and 2)%NC by mass of asphalt., Four tests used in the experimental program to evaluate the modified asphalt properties, there are softening point, ductility, kinematic viscosity, and penetration tests. The results of modified asphalt by nano clay compared with unmodified asphalt, the kinematic viscosity test at 135C◦ shows increasing in small percentage (29.8%, 30.5%) at (0.25%, 0.5%) NC respectively but at higher percentage viscosity properties start to decrease by (13.1%, 7.4%) at (1%, 2%) NC respectively and the penetration test shows decreasing by (27.2%, 31.8%, 27.2%, 13.6%) at (0.25%, 0.5%, 1%, 2%) NC respectively. © 2023 American Institute of Physics Inc.. All rights reserved.