How to Improve the Rutting Resistance of Asphalt Mixtures?

    Rutting refers to the continuous longitudinal groove deformation formed by repeated rolling of vehicles in the same direction on asphalt pavement during high-temperature seasons, particularly in areas where wheels pass intensively. Its depth generally ranges from a few millimeters to several centimeters, and even permanent vertical deformation can occur under the repeated action of vehicle loads, especially in high-temperature seasons. It has become the most serious and common damage to asphalt pavement.

    Oxidized polyethylene wax has excellent cold resistance, heat resistance, wear resistance, and good chemical stability. It has good compatibility with asphalt. As an asphalt modifier, it can quickly combine with asphalt to improve asphalt components without worrying about precipitation from asphalt when the state changes. It can melt and disperse quickly and evenly during asphalt mixing, increase the viscosity of asphalt, enhance the ability of asphalt to resist flow, significantly improve the rutting resistance of asphalt mixtures, and meet other performance requirements of asphalt mixtures.

    Compared with original asphalt, asphalt modified with oxidized polyethylene wax has significant improvements in high-temperature performance, elongation, tensile strength, elasticity, compatibility with mixtures, and anti-aging performance. It can effectively enhance the storage stability of modified asphalt, reduce segregation, maximize the low-temperature ductility of modified asphalt, and improve high-temperature rutting resistance and low-temperature cracking resistance, making it suitable for use in both high-temperature and low-temperature regions.

    Experimental data shows that when the content of oxidized polyethylene wax modifier increases from 0 to 20%, the asphalt softening point increases, penetration decreases, low-temperature ductility increases, flexibility improves, and elastic recovery is enhanced. The effect is very significant, with obvious improvements in both high-temperature and low-temperature performance.

   Therefore, as an asphalt modifier, oxidized polyethylene wax has a large dosage and promising market prospects.