With the development of national economy, the speed of traffic growth is faster and faster. Truck drivers are often overloaded for greater profits. In addition, vehicles are channelized. Therefore, the performance of pavement is improved by modified asphalt, and the service life of asphalt pavement is longer. This is also a major issue faced by highway construction.
Asphalt pavement mainly includes the following performance: low temperature brittleness resistance, high temperature rutting resistance, durability and pavement surface characteristics. Usually, these performance requirements are balanced. For example, if the performance of one side is improved, the performance of the other side will have to be reduced. For example, if we want to improve the high-temperature rutting resistance, we will increase the amount of aggregate, use coarse-grained aggregate, and appropriately reduce the amount of asphalt. However, such mixture has the problems of high stiffness, poor fatigue resistance and easy cracking at low temperature. However, the modified asphalt can change the indicators to solve the above problems.
After modification, the service life of the pavement is prolonged, and the high temperature anti pushing and anti rutting ability of the pavement is also improved.
