Asphalt Lubricates Under Heavy Load
Wang baoliang studied the fatigue behavior of asphalt pavement under axle load and proposed a method to obtain the expression of the stress field formula for asphalt pavement under this condition. Under the actual traffic load, the dynamic response of asphalt pavement is affected not only by internal factors, such as pavement structure and material performance, but also by external environment factors, such as vehicle speed, axle load, temperature, and humidity [4]. Rubberized asphalt (ra), or “wet process”, is a blend of asphalt binder and ground recycled tyre rubber powder from scrap elt. The rubber particles react in the hot asphalt and cause the rubber. Based on multiple regression formula of dynamic stability with dynamic viscosity, temperature and load, the lower limit of 60°c dynamic viscosity is recommended as 50000pa•s for normal region,.
The variation laws of dynamic stability with temperature, load, and asphalt binder viscosity were revealed by complex logarithmic variation. How does asphalt function as a lubricant under load? According to user contributions on brainly, asphalt's lubrication effect occurs because the viscous bitumen can deform and flow under stress. Zhang luyu & ye senming. The objective of this study is to clarify the mechanical response behavior of each structural layer of asphalt pavement under actual traffic load and the variation law of related mechanical parameters. Rutting is one of the main distresses in the asphalt pavements, especially in higher summer temperatures and/or under heavy loads. Asphalt pavement deterioration is caused by various factors such as traffic loading, pavement construction, materials, environment, aging, etc. These factors affect the pavement condition and longevity. Among these factors, traffic loading has a major effect on pavement performance and creates difficulties in sustaining pavement life. The results show that asphalt layer bears an alternating effect of tensile and compressive strain, and when the wheel load is reduced or the driving speed increases, the tensile strain at the bottom of the asphalt layer decreases. 2138875 | received 20 nov 2021, accepted 17 oct 2022, published online: Samples from different periods were extracted to research the influence of the cumulative load times under heavy load on asphalt mixtures. Fatigue performance and stiffness modulus are the principal dynamic mechanical characteristics of a bituminous mixture. Increasing the thickness of asphalt layer or reducing the axle load of vehicle. Road infrastructure is used by various types of vehicles among which heavy vehicles imposes the most critical loading, causing damage in pavement structure, which ultimately leads to an increased maintenance and rehabilitation costs.
2138875 | received 20 nov 2021, accepted 17 oct 2022, published online: Samples from different periods were extracted to research the influence of the cumulative load times under heavy load on asphalt mixtures. Fatigue performance and stiffness modulus are the principal dynamic mechanical characteristics of a bituminous mixture. Increasing the thickness of asphalt layer or reducing the axle load of vehicle. Road infrastructure is used by various types of vehicles among which heavy vehicles imposes the most critical loading, causing damage in pavement structure, which ultimately leads to an increased maintenance and rehabilitation costs.
