Accelerated weathering simulation on rheological properties and chemical structure of high viscosity modified asphalt: A temperature acceleration effect analysis

Understanding the Aging Depth Gradient Distribution of High Viscosity Modified Asphalt under the Effect of Solar Radiation and Diffuse Oxygen

“…Recent studies have shown that reactive oxygen species (ozone and nitrogen oxides) are also one of the causes of asphalt aging . Currently, many scholars used test and simulation methods to investigate the aging of asphalt. − The standard specifications recommend using the PAV test to simulate the long-term aging of asphalt. , However, the PAV test only considers the effect of thermal-oxidative aging, which is not entirely suitable for simulating the field aging of HVMA . HVMA is primarily used in large-void permeable asphalt pavements.…”

“…HVMA is primarily used in large-void permeable asphalt pavements. Besides heat and oxygen, solar radiation and rainfall would also significantly influence the performance of HVMA, especially in high-altitude areas and high-rainfall areas . Therefore, the effect of solar radiation and rainfall should also be considered in addition to heat and oxygen in the laboratory aging simulation.…”

“…Therefore, it is more suitable for simulating the aging of large-void permeable asphalt pavements and HVMA in comparison with the PAV test . In the weathering aging test, the aging caused by temperature is almost the same as standard PAV aging. ,, The effect of humidity and solar radiation is the unique feature of weathering aging compared with PAV aging. Humidity is not a significant aging factor in weathering aging.…”

“…In comparison with temperature and humidity, the aging phenomenon of solar radiation is more complicated in the process of weathering aging. At the surface, HVMA tends to have significant chemical reactions such as oxidation and depolymerization and produces noticeable wrinkles and cracks due to the direct effect of solar radiation . However, unlike thermal aging, the impact depth of solar radiation on HVMA is very limited .…”

Study on Properties of Drainage SBS Modified Asphalt Mixture with Fiber

“…It has good noise reduction, drainage, and antiskid performance, which can effectively improve the safety of travel in rainy days and reduce noise pollution to a certain extent [4,5]. Due to the small content of fine aggregate and mineral powder in the drainage asphalt pavement mixture, there are a large number of communicating interstices, air and rainwater are easy to penetrate into the internal structure, and they are prone to aging and reduce the service life; drainage asphalt mixture is an open-graded skeleton void structure with more coarse aggregate and less adhesive force, so the asphalt binder used in drainage asphalt pavement should have strong adhesion, antistripping, and water resistance to aggregate [6][7][8][9][10][11][12][13].…”